Updated on 2025/03/21

写真a

 
Okada Kenji
 
Organization
Graduate School of Engineering Division of Science and Engineering for Materials, Chemistry and Biology Associate Professor
School of Engineering Department of Materials Science
Title
Associate Professor
Affiliation
Institute of Engineering

Position

  • Graduate School of Engineering Division of Science and Engineering for Materials, Chemistry and Biology 

    Associate Professor  2022.04 - Now

  • School of Engineering Department of Materials Science 

    Associate Professor  2022.04 - Now

Degree

  • 博士(工学) ( Osaka Prefecture University )

Research Areas

  • Nanotechnology/Materials / Nanomaterials

  • Nanotechnology/Materials / Inorganic compounds and inorganic materials chemistry

  • Nanotechnology/Materials / Organic functional materials

  • Nanotechnology/Materials / Inorganic materials and properties

  • Nanotechnology/Materials / Inorganic compounds and inorganic materials chemistry

Research Interests

  • 有機/無機界面

  • Metal-organic framework

  • Oriented films

  • Inorganic materials

  • Porous materials

  • Nanomaterials

Research subject summary

  • 無機材料の表面化学構造を反映した材料合成

  • 金属水酸化物擬単結晶薄膜の形成と機能創出

  • Metal Organic Frameworks (MOFs)配向薄膜の形成と電子/光学デバイスへの応用

Research Career

  • 無機材料の表面化学構造を反映した材料合成

    International Joint Research

    2020.04 - Now 

  • 金属水酸化物擬単結晶薄膜の形成と機能創出

    Joint Research in Organization

    2018 - Now 

  • Metal Organic Frameworks (MOFs)配向薄膜の形成と電子/光学デバイスへの応用

    International Joint Research

    2017 - Now 

Professional Memberships

  • 日本化学会

    2018.03 - Now   Domestic

  • 国際ゾル-ゲル学会(International Sol-Gel Society)

    2011.06 - Now   Overseas

  • 日本ゾル-ゲル学会

    2011.04 - Now   Domestic

  • 日本セラミックス協会

    2011.04 - Now

Committee Memberships (off-campus)

  • 行事企画委員会   日本セラミックス協会  

    2021.04 - Now 

Awards

  • 2024 Emerging Investigator

    2024.10   Nanoscale  

  • 進歩賞

    2024.03   日本化学会  

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    Country:Japan

  • ”2021 Emerging Investigator”

    2021.09   Journal of Materials Chemistry A  

  • 第34回の若い世代の特別講演会

    2021.03   日本化学会  

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    Country:Japan

  • Global Session Best Presentation Award

    2021.03   The 59th Ceramics Basic Science Symposium  

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    Country:Japan

  • Global Session Best Presentation Award

    2021.01   The 59th Ceramics Basic Science Symposium  

  • 日本セラミックス協会 進歩賞

    2019.11   日本セラミックス協会  

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    Country:Japan

  • 第13回 日本ゾル-ゲル学会『Best Poster award』

    2015.11   日本ゾル-ゲル学会  

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    Country:Japan

  • XVIII International Sol-Gel Conference『Excellent poster award』

    2015.09   International Sol-Gel Society  

  • 粉体粉末冶金学会 平成26年度春季大会『優秀講演発表賞』

    2014.06   粉体粉末冶金学会  

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    Country:Japan

  • SiO2 Advanced Dielectrics and Related Devices Ⅹ International Symposium『Young Scientist Award』

    2014.06   SiO2 Advanced Dielectrics and Related Devices Ⅹ International Symposium  

  • CIPS2013(CSIRO Intelligent Processing Symposium and Workshop)『Best Poster Presentation』

    2013.05   CSIRO Intelligent Processing Symposium and Workshop  

  • 2012 OPU-KIST-ECUST Joint Symposium on Advanced Materials and their Applications『Best Poster Award』

    2012.09   OPU-KIST-ECUST Joint Symposium on Advanced Materials and their Applications  

  • 日本表面科学会関西支部20周年 若手ポスター発表会 『優秀ポスター賞』

    2012.03   日本表面科学会関西支部  

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    Country:Japan

  • 16th International Sol-Gel Conference『Best Poster Award』

    2011.09   International Sol-Gel Society  

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Job Career (off-campus)

  • 大阪公立大学   大学院工学研究科 物質・化学系専攻

    2022.04 - Now

  • Osaka Prefecture University

    2020.11 - 2022.03

  • 国立研究開発法人 科学技術振興機構 さきがけ研究員兼任

    2019.10 - Now

  • Japan Science and Technology Agency

    2019.10 - Now

  • Osaka Prefecture University   Graduate School of Engineering, Division of Materials Science and Engineering

    2017.11 - 2020.10

  • 大阪大学大学院工学研究科応用化学専攻 助教

    2015.11 - 2017.10

  • 日本学術振興会特別研究員(PD)

    2014.10 - 2015.10

  • 日本学術振興会特別研究員(DC1)

    2013.04 - 2014.09

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Papers

  • Carbon Dot‐Doped Silica Xerogel Phosphors Excited by Blue LEDs and LDs for the Brilliant White Lighting of Endoscope Tips Reviewed OA

    Hirohisa Iwabayashi, Kenji Okada, Arisa Fukatsu, Kazumasa Suzuki, Ryohei Mori, Masahide Takahashi

    Advanced Materials Interfaces   2025.03

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Endoscopy, a crucial, minimally invasive medical procedure, is poised for significant advancements in the integration of cutting-edge optical technologies. Although rare-earth-doped single-crystal phosphors offer high-luminance white light at their endoscope tips via external excitation of a wavelength conversion element, their cost, toxicity, and complex fabrication processes limit their widespread adoption. This study presents a novel approach to the development of biocompatible, cost-effective phosphors for endoscopic applications. By incorporating carbon dots into a silica glass (xerogel) matrix via a simple sol–gel process, transparent phosphor rods is successfully fabricated. The incorporation of carbon dots reinforced the monolithic phosphor, enabling the fabrication of centimeter-scale monolithic phosphors. These carbon dot-doped silica xerogel phosphors exhibits efficient blue-to-white light conversion, making them promising candidates for next-generation endoscopes. This approach offers a sustainable, scalable solution for the development of advanced endoscopic devices with enhanced imaging capabilities and reduced environmental impacts.

    DOI: 10.1002/admi.202401015

  • Lowering the combustion temperature of organic components in organosiloxane gels by an incorporation of copper ions Reviewed

    Naonobu Oura, Arisa Fukatsu, Kenji Okada, Kazutaka Kamitani, Masahide Takahashi

    Journal of Sol-Gel Science and Technology   2025.03( ISSN:0928-0707

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    The sol-gel method enables glass fabrication at significantly lower temperatures than conventional methods such as the melt-quenching processes. However, heat treatment at high temperatures is still required to remove organic residues and densify the structure. Lowering the combustion temperatures of gels derived by the sol-gel method can provide not only industrial benefits but also environmental ones. In the present work, we investigated the catalytic effect of Cu compounds on lowering the combustion temperature of organic residues, thereby facilitating the removal of organic residues at reduced temperatures. Specifically, the role of Cu2+ as a catalyst for the decomposition of organic groups within siloxane structures was focused. Methylsiloxane, which contains methyl groups attached to the siloxane side chain, was used as a model compound to quantitatively evaluate the catalytic effect of Cu2+ in lowering the combustion temperature of methyl groups. Methylsiloxane powders were synthesized via the sol-gel method, and Cu2+-doped methylsiloxane powders were prepared by incorporating copper sources such as Cu(NO3)2 or others into the precursor solution. Thermogravimetric-differential thermal analysis (TG-DTA) and Fourier-transform infrared (FT-IR) spectroscopy revealed that the Si-CH3 bonds in the Cu-doped powders underwent combustion and decomposition at significantly lower temperatures compared to those in undoped methylsiloxane powders. These findings demonstrate that Cu can effectively catalyze the low-temperature combustion of organic components. The present finding has the potential to enable silica glass fabrication at lower temperatures than previously achievable, thereby reducing energy consumption. Additionally, it offers promising opportunities for expanding the applicability of glass materials to new domains.

    DOI: 10.1007/s10971-025-06718-4

  • Solvato/Vapochromism‐Based Alcohol Sensing through Metal–Organic Framework Thin Films with Coordinatively Unsaturated Metal Sites Reviewed OA

    Yuto Toki, Kenji Okada, Arisa Fukatsu, Yuta Tsuji, Masahide Takahashi

    Small Science   2025.02

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Ethanol (EtOH) is a ubiquitous compound with critical applications across various industries, necessitating accurate and reliable sensing for sanitation, quality control, and environmental monitoring. Chromism-based sensors, known for their simplicity, portability, and real-time detection capabilities, have faced limitations in EtOH sensing due to insufficient sensitivity, low selectivity, irreversibility, and low color perception. Herein, a groundbreaking solvato/vapochromism-based EtOH sensor utilizing a Cu-based metal–organic framework (MOF) thin film, Cu-MOF-74, is reported. The conversion of Cu-based ceramics to Cu-MOF-74 facilitates the fabrication of solvato/vapochromic MOF thin films with low light scattering, enabling effective colorimetric analysis. The Cu-MOF-74 thin films demonstrate rapid and reversible solvato/vapochromism upon the adsorption of guest molecules, including water and EtOH. This unique behavior allows for the precise and reliable detection of EtOH across the entire concentration range. Furthermore, a smartphone application is developed to detect EtOH concentrations, enabling rapid and convenient evaluation of EtOH levels. The findings represent a significant advancement in EtOH sensing technology, overcoming the limitations of traditional methods. The Cu-MOF-74-based sensor offers a versatile and reliable solution for various applications, including environmental monitoring, process control, and healthcare.

    DOI: 10.1002/smsc.202400634

  • Synthesis of a Platinum Linker Complex as a Scaffold for the Hybridization of Naturally Occurring DNA and Gold Nanoparticles Reviewed

    Yasui Ibuki, Shimizu Hayaki, Fukatsu Arisa, Tomoda Misa, Kondo Mio, Masaoka Shigeyuki, Okada Kenji, Takahashi Masahide

    MATERIALS TRANSACTIONS   advpub ( 0 )   2025( ISSN:13459678 ( eISSN:13475320

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Composites of DNA and gold nanoparticles are expected to be stimuli-responsive and photo-functional materials that can synergistically utilize both the stimuli-responsiveness derived from DNA and the optical properties derived from gold nanoparticles. However, conventional methods require the bottom-up synthesis of artificial DNA modified with functional groups such as thiols that can form chemical bonds with gold nanoparticles, which limits the flexible design of the resulting composite. Therefore, we conceived the idea of introducing a “linker” that can interact with both gold nanoparticles and the bases naturally exist in DNA. The introduction of such a linker allows naturally occurring DNA, which is abundant in nature and has long strand lengths, to utilize as the multi-functional material platform. In this work, we designed and synthesized a linker complex with disulfide group and platinum(II) ion to interact with gold nanoparticles and the bases of DNA, respectively. Furthermore, the interaction between gold nanoparticles and naturally occurring DNA via the platinum linker complex was confirmed using UV–visible absorption spectroscopy.

    DOI: 10.2320/matertrans.mt-y2024010

  • Liquid Polyether-Based Water Harvester for Near Ambient Temperature Operation via Hydrophilicity-Difference-Induced Water Transfer Reviewed

    Daisuke Ikegawa, Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    ACS ES&T Water   4 ( 11 )   5169 - 5177   2024.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Liquid moisture adsorbents recover water from the atmosphere and are used in applications such as atmospheric water harvesting (AWH) and desiccant air conditioning (DAC). Liquid adsorbents allow for flexible device design as well as lower regeneration temperatures. Although both the adsorption and desorption performance of liquid adsorbents is essential for energy efficiency, the latter has been less studied. Previously, we combined oligomeric poly(ethylene glycol) (PEG) and oligomeric poly(propylene glycol) (PPG), resulting in a lowered water desorption temperature and enhanced water desorption efficiency, which was facilitated by a “hydrophilicity-difference-induced water transfer (HWT)” mechanism. However, the inclusion of hydrophobic molecules limits the water adsorption capacity of the mixture. In this study, PEG-PPG copolymer combinations with PEG were investigated for enhancing HWT. The results of water adsorption and desorption experiments and thermogravimetric differential thermal analyses revealed that the PEG-PPG copolymer combinations effectively improved the water harvesting rate. The PEG-PPG random copolymer exhibited the highest water harvesting rate, above that of PEG. The improved water recovery originated from the synergistic effect of HWT and the collapse of water clusters. The proposed concept is expected to be applied to various hygroscopic liquids to develop energy-efficient liquid adsorbents for AWH and DAC.

    DOI: 10.1021/acsestwater.4c00775

  • Formation of interfaces responsive and adaptive to environment via the sol-gel method Reviewed International coauthorship OA

    Masahide Takahashi, Kenji Okada, Luca Malfatti, Plinio Innocenzi

    Journal of Sol-Gel Science and Technology   112   174 - 181   2024.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Smart devices, such as soft robots, artificial organs, and soft actuators, require materials that adapt their morphologies and properties in response to their environment. These materials can be obtained through the composition of different types of materials that exhibit different responses to environmental stimuli, arranged in a rational spatial configuration. We achieved unique responsive materials by forming interfaces and surfaces of appropriate materials using the sol–gel method. In recent decades, we have proposed the use of wrinkles and nano-brushes on sol–gel-derived materials for various sophisticated applications, such as micropattern fabrication, wettability control, and linear actuators for size-selective transportation. This account introduces environment-responsive materials with rational interfaces via the sol–gel method, particularly those characterized by surface morphology.

    DOI: 10.1007/s10971-024-06522-6

  • Improved optical quality of heteroepitaxially grown metal-organic framework thin films by modulating the crystal growth Invited Reviewed OA

    Yuka Koseki, Kenji Okada, Shotaro Hashimoto, Shun Hirouchi, Arisa Fukatsu, Masahide Takahashi

    Nanoscale   16 ( 29 )   14101 - 14107   2024.06( ISSN:20403364

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Fabricating high-quality thin films of metal–organic frameworks (MOFs) is important for integrating MOFs in various applications. Specifically, optical/electrical devices require MOF thin films that are crystallographically oriented, with closely packed crystals and smooth surfaces. Although the heteroepitaxial growth approach of MOFs on metal hydroxides has been demonstrated to control the orientation of the three crystallographic axes, the fabrication of MOF thin films with both three-dimensional crystallographic orientation and smooth surfaces remains a challenge. In this study, we report the fabrication of high-quality thin films of MOFs with closely packed MOF crystals, smooth surfaces, optical transparency, and crystal alignment by modulating the crystal growth of MOFs using the heteroepitaxial growth approach. High-quality thin films of Cu-paddlewheel-based pillar-layered MOFs are fabricated on oriented Cu(OH)2 thin films via epitaxial growth using acetate ions as modulators to control the crystal morphology. Increasing the modulator concentration results in a uniform crystal shape with a relatively long one-dimensional pore direction and uniform heterogeneous nucleation over the entire film. The MOF thin films fabricated using the modulator exhibit high optical transparency. High-quality MOF thin films with dense and flat surfaces will pave the way for integrating MOFs into sophisticated optical and electrical devices.

    DOI: 10.1039/d4nr01885k

  • Machine learning-assisted chemical design of highly efficient deicers Reviewed OA

    Kai Ito, Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    Scientific Reports   14 ( 1 )   12453   2024.06( ISSN:2045-2322

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    The use of deicers in urban areas, on runways and aircrafts has raised concerns about their environmental impact. Understanding the ice-melting mechanism is crucial for developing environmentally friendly deicers, yet it remains challenging. This study employs machine learning to investigate the ice penetration capacity (IPC) of 21 salts and 16 organic solvents as deicers. Relationships between their IPC and various physical properties were analysed using extreme gradient boosting (XGBoost) and Shapley additive explanation (SHAP). Three key ice-melting mechanisms were identified: (1) freezing-point depression, (2) interactions between deicers and H2O molecules and (3) infiltration of ions into ice crystals. SHAP analysis revealed different ice-melting factors and mechanisms for salts and organic solvents, suggesting a potential advantage in combining the two. A mixture of propylene glycol (PG) and sodium formate demonstrated superior environmental impact and IPC. The PG and sodium formate mixture exhibited higher IPC when compared to six commercially available deicers, offering promise for sustainable deicing applications. This study provides valuable insights into the ice-melting process and proposes an effective, environmentally friendly deicer that combines the strengths of organic solvents and salts, paving the way for more sustainable practices in deicing.

    DOI: 10.1038/s41598-024-62942-y

  • Fabrication of Light-Driven Soft Actuators of Polymer/Ag Nanoparticles Embedded Metal-Organic Framework/Polymer Composite Thin Films Reviewed OA

    KOSEKI Yuka, MASHITA Risa, FUKATSU Arisa, OKADA Kenji, TAKAHASHI Masahide

    Journal of the Japan Society of Powder and Powder Metallurgy   2024.01

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    Authorship:Corresponding author   International / domestic magazine:Domestic journal  

    DOI: 10.2497/jjspm.23-00070

    Repository URL: http://hdl.handle.net/10466/0002001387

  • Synthesis of a Platinum Linker Complex as a Scaffold for the Hybridization of Naturally Occurring DNA and Gold Nanoparticles Reviewed OA

    YASUI Ibuki, SHIMIZU Hayaki, FUKATSU Arisa, TOMODA Misa, KONDO Mio, MASAOKA Shigeyuki, OKADA Kenji, TAKAHASHI Masahide

    Journal of the Japan Society of Powder and Powder Metallurgy   2024.01

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    International / domestic magazine:Domestic journal  

    DOI: 10.2497/jjspm.23-00071

    Repository URL: http://hdl.handle.net/10466/0002001388

  • Accelerated Water Desorption of Oligomeric Poly(ethylene glycol) by Addition of Poly(propylene glycol) for Energy-Efficient Water Recovery Systems Reviewed

    Daisuke Ikegawa, Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    ACS Omega   2024.01

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1021/acsomega.3c07310

  • Additive manufacturing using highly concentrated nanocolloids of metal hydroxide salts towards structured metals and metal oxides Reviewed OA

    2023.10

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    DOI: 10.2109/jcersj2.23119

    Repository URL: http://hdl.handle.net/10466/0002001386

  • Polarization-dependent plasmonic heating in epitaxially grown multilayered metal–organic framework thin films embedded with Ag nanoparticles Reviewed

    Kenji Okada, Risa Mashita, Arisa Fukatsu, Masahide Takahashi

    Nanoscale Advances   5 ( 6 )   1795 - 1801   2023.02( eISSN:2516-0230

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Polarization-dependent plasmonic heating by lasers in a multilayered metal–organic framework (MOF-on-MOF) oriented film embedded with silver nanoparticles, paving the way for MOF-based thin-film devices with temperature-controllable electrical and optical properties.

    DOI: 10.1039/D2NA00882C

  • Alcohol-induced deboronation of organoborosilicate thin films Reviewed

    Arisa Fukatsu, Ayana Karim, Kenji Okada, Masahide Takahashi

    Journal of Sol-Gel Science and Technology   104 ( 3 )   485 - 489   2022.12( ISSN:0928-0707 ( eISSN:1573-4846

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1007/s10971-022-05897-8

    Other URL: https://link.springer.com/article/10.1007/s10971-022-05897-8/fulltext.html

  • Guest Alignment and Defect Formation during Pore Filling in Metal–Organic Framework Films Reviewed

    Bettina Baumgartner, Risa Mashita, Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    Angewandte Chemie International Edition   61 ( 28 )   e202201725   2022.07( ISSN:1433-7851 ( eISSN:1521-3773

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    The degree of pore filling is an important parameter for defining guest@MOF properties in applications including electronics, optics, and gas separation. However, the interplay of key aspects of host–guest interactions, such as a quantitative description of the guest alignment or the structural integrity of the host as function of pore filling are yet to be determined. Polarisation-dependent infrared spectroscopy in attenuated total reflection configuration combined with gas sorption allowed to simultaneously study the orientation of the guest molecule and structural changes of the MOF framework during the pore filling process. Thereby we found, that initially randomly oriented guest molecules align with increasing pore filling during adsorption from the gas phase. At the same time, the framework itself undergoes a reversible, guest molecule-dependent rotation of the aromatic linker and a linker detachment process, which induce defects.

    DOI: 10.1002/anie.202201725

    Other URL: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/anie.202201725

  • Crystalline Framework Formation in Single-digit Nanometer Scale Silica Nanoparticles of Reverse Mesostructure Reviewed

    Shigeru Sakamoto, Kenji Okada, Shinji Tanaka, Yasuhito Kotera, Arisa Fukatsu, Masahide Takahashi

    Chemistry Letters   51 ( 6 )   605 - 609   2022.06( ISSN:0366-7022 ( eISSN:1348-0715

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1246/cl.220108

  • Ausrichtung von Gastmolekülen und Defektbildung während der Porenfüllung in Metallorganischen Gerüstverbindungsdünnschichten Reviewed

    Bettina Baumgartner, Risa Mashita, Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    Angewandte Chemie   2022.05

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    DOI: 10.1002/ange.202201725

  • Colloidal dispersion of chiral layered hydroxide salt (LHS) nanocrystals exhibiting chiroptical response Reviewed

    Yasuaki Tokudome, Akihiro Koyama, Hidenobu Murata, Kenji Okada, Atsushi Nakahira, Shigenori Nishimura, Masahide Takahashi

    Journal of Sol-Gel Science and Technology   104   580 - 587   2022.04( ISSN:0928-0707 ( eISSN:1573-4846

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Chiral inorganic materials have attracted increasing attention in the fields such as catalysis, electronics, photonics, and sensing. A new class of functional materials with chirality is extensively explored. Herein, we demonstrate the synthesis of nanometric nickel layered hydroxide salt (Ni-LHS) modified with chiral amino acids, (D- or L-) phenylalanine (PHE). An alkalization reaction in a starting mixture of nickel-phenylalanine aqua complexes was induced by using propylene oxide, leading to intercalate and adsorb phenylalanine on the surface and into the interlayers of Ni-LHS in an in-situ manner. The chiral molecules also act as surface modifier to inhibit the extensive crystal growth and aggregation, to form Ni-LHS with a diameter of 2–3 nm in a state of stablly-suspended in a solvent. It was also found that Ni-LHS exhibit induced circular dichroism (ICD) in the spectral range of d-d transitions of Ni(II) metal centres. The layered nanomaterials with chiroptical response demonstrated here is a promising option as an advanced adsorbent for detection of molecules. [Figure not available: see fulltext.]

    DOI: 10.1007/s10971-022-05766-4

  • Semi‐Automatic Deposition of Oriented Cu(OH)2 Nanobelts for the Heteroepitaxial Growth of Metal–Organic Framework Films Reviewed

    Mercedes Linares‐Moreau, Lea A. Brandner, Tomas Kamencek, Sumea Klokic, Francesco Carraro, Kenji Okada, Masahide Takahashi, Egbert Zojer, Christian J. Doonan, Paolo Falcaro

    Advanced Materials Interfaces   8 ( 21 )   2101039 - 2101039   2021.10( ISSN:2196-7350 ( eISSN:2196-7350

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Processing oriented metal–organic frameworks (MOFs) as thin films is a key challenge for their application to device fabrication. However, typical fabrication methods cannot generate precisely oriented crystals on commercially relevant scales (i.e., cm2). This limits access to applications that require anisotropic functional properties (e.g., separation, optics, and electronics). Currently, highly oriented copper-based MOFs are synthesized via the addition of the organic MOF component to an ethanolic solution of manually aligned Cu(OH)2 nanobelt films. In this work, the optimization of a semi-automatic method for the fabrication of precisely oriented MOF films that affords a 100% yield of high quality ceramic films at the centimeter scale is reported. This improved fabrication protocol will facilitate the progress of heteroepitaxially grown MOFs for molecular separators and micro-opto-electronic devices.

    DOI: 10.1002/admi.202101039

    Other URL: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/admi.202101039

  • Semi‐Automatic Deposition of Oriented Cu(OH)2 Nanobelts for the Heteroepitaxial Growth of Metal–Organic Framework Films Reviewed

    M. Linares‐Moreau, L. A. Brandner, T. Kamencek, S. Klokic, F. Carraro, K. Okada, M. Takahashi, E. Zojer, C. J. Doonan, P. Falcaro

    Advanced Materials Interfaces 雑誌   2021.10

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    Kind of work:Joint Work  

  • Infrared crystallography for framework and linker orientation in metal–organic framework films Reviewed

    B. Baumgartner, K. Ikigaki, K. Okada, M. Takahashi

    Chemical Science 雑誌   12 ( 27 )   9298 - 9308   2021.05

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    Kind of work:Joint Work  

  • Epitaxial Growth of Multilayered Metal-Organic Framework Thin Films for Electronic and Photonic Applications Reviewed

    K. Ikigaki, K. Okada, M. Takahashi

    ACS Applied Nano Materials 雑誌   2021

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    Kind of work:Joint Work  

  • Synthesis of high-specific-surface-area Li-Al mixed metal oxide: Through nanoseed-assisted growth of layered double hydroxide Reviewed

    M. Takemoto, Y. Tokudome, H. Murata, K. Okada, M. Takahashi, A. Nakahira

    Applied Clay Science 雑誌   203   2021

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    Kind of work:Joint Work  

  • Reactivity of silanol group on siloxane oligomers for designing molecular structure and surface wettability Reviewed

    D. Kino, K. Okada, Y. Tokudome, M. Takahashi, L. Malfatti, P. Innocenzi

    Journal of Sol-Gel Science and Technology 雑誌   97 ( 3 )   734 - 742   2021

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    Kind of work:Joint Work  

  • Epitaxial Growth of Multilayered Metal-Organic Framework Thin Films for Electronic and Photonic Applications Reviewed OA

    Ikigaki, K., Okada, K., Takahashi, M.

    ACS Applied Nano Materials   4 ( 4 )   3467 - 3475   2021( ISSN:2574-0970 ( eISSN:2574-0970

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    Multilayered metal-organic frameworks (MOF) thin films, called MOF-on-MOF thin films, generate integrated and multiple functionalities toward high-performance sensing, electrochemical, and optical devices. Although epitaxy at the MOF/MOF interfaces in these multilayered MOF films plays a crucial role for high functionalities, the effect of structural consistency at a molecular scale at the epitaxial interface on the quality of the films (e.g., crystallite size and degree of orientation of MOF-on-MOF thin films) has not been explored. Here, we report the factors governing such physical parameters by revealing a relationship between lattice mismatch ratios and orientations of MOF-on-MOF thin films with epitaxial interfaces (referred as to "e-MoM thin films"). Highly oriented e-MoM thin films were successfully obtained by considering not only lattice mismatch ratios but also stacking order depending on the lattice parameters of MOF components. Because of the chemical and structural tunability of e-MoM materials, the present finding will offer insight into fabricating e-MoM thin films for designing future MOF-based devices.

    DOI: 10.1021/acsanm.0c03462

  • Synthesis of high-specific-surface-area Li-Al mixed metal oxide: Through nanoseed-assisted growth of layered double hydroxide Reviewed

    Takemoto, M., Tokudome, Y., Murata, H., Okada, K., Takahashi, M., Nakahira, A.

    Applied Clay Science   203   106006 - 106006   2021( ISSN:0169-1317

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    DOI: 10.1016/j.clay.2021.106006

  • Reactivity of silanol group on siloxane oligomers for designing molecular structure and surface wettability Reviewed

    Kino, D., Okada, K., Tokudome, Y., Takahashi, M., Malfatti, L., Innocenzi, P.

    Journal of Sol-Gel Science and Technology   97 ( 3 )   734 - 742   2021( ISSN:1573-4846 ( eISSN:1573-4846

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    Molecular structures of siloxane materials should be highly controlled for achieving advanced functionalities. However, it is still difficult to precisely control the structure of siloxane materials by the sol–gel processing. In the present study, we focused on the silanol groups in the intermediate oligomers and resultant siloxane materials as a key structural unit for controlling the molecular structure. Thermal stability and chemical reactivity of silanol groups were found to be highly dependent on the steric effects of the surrounding side chains and siloxane skeletons. The present work suggests that controlling the steric effects around silanol groups in the intermediate oligomers allows modulating the crosslink density of siloxane skeletons. The selective molecular modification tunes the structure and chemical properties of the resultant siloxane materials. [Figure not available: see fulltext.]

    DOI: 10.1007/s10971-020-05448-z

  • Oriented growth of semiconducting TCNQ@Cu3(BTC)2 MOF on Cu(OH)2: crystallographic orientation and pattern formation toward semiconducting thin-film devices Reviewed

    Kenji Okada, Keyaki Mori, Arisa Fukatsu, Masahide Takahashi

    Journal of Materials Chemistry A   9 ( 35 )   19613 - 19618   2021( ISSN:2050-7488 ( eISSN:2050-7496

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    Oriented film and pattern of TCNQ@Cu<sub>3</sub>(BTC)<sub>2</sub>(HKUST-1) fabricated <italic>via</italic> epitaxial growth exhibit anisotropic electrical properties toward MOF-based (flexible) thin-film smart device applications, such as transistors and thermoelectric thin films.

    DOI: 10.1039/d1ta02968a

  • Infrared crystallography for framework and linker orientation in metal–organic framework films Reviewed

    Bettina Baumgartner, Ken Ikigaki, Kenji Okada, Masahide Takahashi

    Chemical Science   12 ( 27 )   9298 - 9308   2021( ISSN:2041-6520 ( eISSN:2041-6539

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    <p>Polarization-dependent infrared spectroscopy of oriented metal organic framework films fills the information gap left by diffraction methods and gives access to the orientation of the aromatic linker and initial orientation of ultra-thin films.</p>

    DOI: 10.1039/d1sc02370e

  • Thermo-responsive wettability: Via surface roughness change on polymer-coated titanate nanorod brushes toward fast and multi-directional droplet transport Reviewed

    K. Okada, Y. Miura, T. Chiya, Y. Tokudome, M. Takahashi

    RSC Advances 雑誌   10 ( 47 )   28032 - 28036   2020

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  • Synthesis of a Crystalline and Transparent Aerogel Composed of Ni-Al Layered Double Hydroxide Nanoparticles through Crystallization from Amorphous Hydrogel Reviewed

    M. Takemoto, Y. Tokudome, D. Noguchi, R. Ueoka, K. Kanamori, K. Okada, H. Murata, A. Nakahira, M. Takahashi

    Langmuir 雑誌   36 ( 32 )   9436 - 9442   2020

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  • Preparation of silicophosphate alternating hybrid copolymers via nonaqueous acid-base reactions of phosphoric acid and organo-bridged Bis(chlorosilane) Reviewed

    K. Okada, M. Takano, Y. Tokudome, Y. Tokuda, M. Takahashi

    Molecules 雑誌   25 ( 1 )   2020

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    Kind of work:Joint Work  

  • One-dimensional metal hydroxide nanomaterials with macroscopically controlled orientation and aggregation: Fascinating surface hydroxyl groups on anisotropic structures for functionalities Reviewed

    K. Okada

    Journal of the Ceramic Society of Japan 雑誌   128 ( 9 )   627 - 634   2020

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    Kind of work:Single Work  

  • Imparting CO<inf>2</inf> reduction selectivity to ZnGa<inf>2</inf>O<inf>4</inf> photocatalysts by crystallization from hetero nano assembly of amorphous-like metal hydroxides Reviewed

    M. Takemoto, Y. Tokudome, S. Kikkawa, K. Teramura, T. Tanaka, K. Okada, H. Murata, A. Nakahira, M. Takahashi

    RSC Advances 雑誌   10 ( 14 )   8066 - 8073   2020

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  • Fabrication of Metal-organic Framework (MOF) thin films from copper hydroxide nano-assemblies Reviewed

    K. Ikigaki, K. Okada, M.. Takahashi

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 雑誌   67 ( 3 )   132 - 139   2020

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  • Controlling the alignment of 1D nanochannel arrays in oriented metal-organic framework films for host-guest materials design Reviewed

    K. Okada, M. Nakanishi, K. Ikigaki, Y. Tokudome, P. Falcaro, C.J. Doonan, M. Takahashi

    Chemical Science 雑誌   11 ( 30 )   8005 - 8012   2020

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  • Controlling the alignment of 1D nanochannel arrays in oriented metal-organic framework films for host-guest materials design Reviewed OA

    Okada, K., Nakanishi, M., Ikigaki, K., Tokudome, Y., Falcaro, P., Doonan, C.J., Takahashi, M.

    Chemical Science   11 ( 30 )   8005 - 8012   2020( ISSN:2041-6539 ( eISSN:2041-6539

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    © 2020 The Royal Society of Chemistry. Controlling the direction of molecular-scale pores enables the accommodation of guest molecular-scale species with alignment in the desired direction, allowing for the development of high-performance mechanical, thermal, electronic, photonic and biomedical organic devices (host-guest approach). Regularly ordered 1D nanochannels of metal-organic frameworks (MOFs) have been demonstrated as superior hosts for aligning functional molecules and polymers. However, controlling the orientation of MOF films with 1D nanochannels at commercially relevant scales remains a significant challenge. Here, we report the fabrication of macroscopically oriented films of Cu-based pillar-layered MOFs having regularly ordered 1D nanochannels. The direction of 1D nanochannels is controllable by optimizing the crystal growth process; 1D nanochannels align either perpendicular or parallel to substrates, offering molecular-scale pore arrays for a macroscopic alignment of functional guest molecules in the desired direction. Due to the fundamental interest and widespread technological importance of controlling the alignment of functional molecules and polymers in a particular direction, orientation-controllable MOF films will open up the possibility of realising the potential of MOFs in advanced technologies.

    DOI: 10.1039/d0sc02958k

  • Thermo-responsive wettability: Via surface roughness change on polymer-coated titanate nanorod brushes toward fast and multi-directional droplet transport Reviewed OA

    Okada, K., Miura, Y., Chiya, T., Tokudome, Y., Takahashi, M.

    RSC Advances   10 ( 47 )   28032 - 28036   2020( ISSN:2046-2069 ( eISSN:2046-2069

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work   International / domestic magazine:International journal  

    © The Royal Society of Chemistry. A novel approach for thermo-responsive wettability has been accomplished by surface roughness change induced by thermal expansion of paraffin coated on titanate nanostructures. The surface exhibits thermo-responsive and reversible wettability change in a hydrophobic regime; the surface shows superhydrophobicity with contact angles of ∼157° below 50 °C and ∼118° above 50 °C due to a decrease of surface roughness caused by thermally-expanded paraffin at higher temperatures. Reversible wettability change of ∼40° of a contact angle allows for fast and multi-directional droplet transport. The present approach affords a versatile selection of materials and wide variety of contact angles, promoting both scientific advancement and technology innovation in the field of smart surfaces. This journal is

    DOI: 10.1039/d0ra05471b

  • Synthesis of a Crystalline and Transparent Aerogel Composed of Ni-Al Layered Double Hydroxide Nanoparticles through Crystallization from Amorphous Hydrogel Reviewed

    Takemoto, M., Tokudome, Y., Noguchi, D., Ueoka, R., Kanamori, K., Okada, K., Murata, H., Nakahira, A., Takahashi, M.

    Langmuir   36 ( 32 )   9436 - 9442   2020( ISSN:1520-5827 ( eISSN:1520-5827

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    © 2020 American Chemical Society. Enormous efforts have been devoted to the development of crystalline aerogels toward heterogeneous catalysis, energy storage, ion/molecular absorption, and luminescence. However, properties of aerogels are not fully exploited due to their low content of functional moieties embedded in their solid networks, low crystallinity, and limited chemical compositions. Herein, we develop a one-pot approach based on crystallization from amorphous metal hydroxides modified with a β-diketone ligand, toward crystalline transition-metal hydroxide aerogels. Synthesis of monolithic and crystalline aerogels of layered double hydroxide (LDH) was performed in a Ni-Al system starting from aqueous ethanol solutions of NiCl2·6H2O and AlCl3·6H2O with acetylacetone (acac) as an organic ligand. Propylene oxide (PO) as an alkalization reagent was added into precursory solutions to yield monolithic wet gels. The successive pH increase induces the formation of a three-dimensional (3-D) solid framework composed of amorphous Al(OH)3. Then, amphoteric Al(OH)3 undergoes crystallization into Ni-Al LDH via an acetylacetone-driven dissolution-crystallization of metal hydroxides without destroying the preformed 3-D solid framework. The process allows us to obtain crystalline aerogel monoliths with high porosity and high transparency after supercritical CO2 drying of wet gels. The present scheme can be expected to synthesize functionalized aerogel composed of crystalline transition-metal oxide/hydroxide nanobuilding blocks (NBBs).

    DOI: 10.1021/acs.langmuir.0c01292

    PubMed

  • Preparation of silicophosphate alternating hybrid copolymers via nonaqueous acid-base reactions of phosphoric acid and organo-bridged Bis(chlorosilane) Reviewed OA

    Okada, K., Takano, M., Tokudome, Y., Tokuda, Y., Takahashi, M.

    Molecules   25 ( 1 )   2020( ISSN:1420-3049 ( eISSN:1420-3049

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    © 2019 by the authors. Licensee MDPI, Basel, Switzerland. A design of atomic and oligomer level structure in organic-inorganic hybrid materials is highly important for various applications. Nonaqueous acid-base reaction allows us to prepare silicophosphates with controlled inorganic networks (-(O-P-O-Si)n) at atomic level because phosphorous and silicon-based precursors can react directly, resulting in an alternating copolymer network. Organic functionalization in those materials has been realized so far by using organic-modified phosphorous acid and/or organo-chlorosilane as precursors. In the present study, silicophosphate oligomers exhibiting inorganic-organic hybrid chains of (-(O-P-O-Si-R-Si)n) (R: bridging organic functional groups), are prepared from phosphoric acid and organo-bridged bis(chlorosilane). The 1, 2-bis(chlorodimethylsilyl)ethane ((C2H4)(Me2SiCl)2) and 1, 4-bis(chlorodimethylsilyl)benzene ((C6H4)(Me2SiCl)2) were used as organo-bridged bis(chlorosilane). Different types of silicophosphate oligomers with different network structures and terminal groups (P-OH and/or Si-Cl) were prepared by changing the reaction temperature and molar ratio of precursors. The formation of low molecular weight oligomers of ring and cage morphologies (ring tetramer, cage pentamer, and ring hexamer) is suggested in the product prepared from phosphoric acid and (C6H4)(Me2SiCl)2 molecule at 150 °C. Those silicophosphate hybrid oligomers are expected to be used as building blocks of hybrid materials with well-defined network structures for desired functionalities.

    DOI: 10.3390/molecules25010127

    PubMed

  • One-dimensional metal hydroxide nanomaterials with macroscopically controlled orientation and aggregation: Fascinating surface hydroxyl groups on anisotropic structures for functionalities Reviewed

    Okada, K.

    Journal of the Ceramic Society of Japan   128 ( 9 )   2020( ISSN:1348-6535

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    DOI: 10.2109/jcersj2.20105

  • Imparting CO<inf>2</inf> reduction selectivity to ZnGa<inf>2</inf>O<inf>4</inf> photocatalysts by crystallization from hetero nano assembly of amorphous-like metal hydroxides Reviewed

    Takemoto, M., Tokudome, Y., Kikkawa, S., Teramura, K., Tanaka, T., Okada, K., Murata, H., Nakahira, A., Takahashi, M.

    RSC Advances   10 ( 14 )   8066 - 8073   2020( ISSN:2046-2069 ( eISSN:2046-2069

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    Imparting an enhanced CO2 reduction selectivity to ZnGa2O4 photocatalysts has been demonstrated by controlled crystallization from interdispersed nanoparticles of zinc and gallium hydroxides. The hydroxide precursor in which Zn(ii) and Ga(iii) are homogeneously interdispersed was prepared through an epoxide-driven sol-gel reaction. ZnGa2O4 obtained by a heat-treatment exhibits a higher surface basicity and an enhanced affinity for CO2 molecules than previously-reported standard ZnGa2O4. The enhanced affinity for CO2 molecules of the resultant ZnGa2O4 leads to highly-selective CO evolution in CO2 photo-reduction with H2O reductants. The present scheme is promising to achieve desirable surface chemistry on metal oxide photocatalysts.

    DOI: 10.1039/d0ra00710b

  • Fabrication of Metal-organic Framework (MOF) thin films from copper hydroxide nano-assemblies Reviewed OA

    Ikigaki, K., Okada, K., Takahashi, M.

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy   67 ( 3 )   132 - 139   2020( ISSN:0532-8799

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    Thin films of metal-organic frameworks (MOFs) have attracted huge interests for various applications (e.g., sensing, catalysts and opto-electronics) due to their large porosity and tunable chemical property. Controlling the position and orientation of MOF crystals on device-scale substrates (over the centimeter scale) is required for the practical use of these sophisticated applications. Cu(OH)2 is a good precursor of the Cu-based MOF thin film due to their high reactivity with organic linkers, which allows for the growth of MOFs under mild conditions. In addition, lattice matching allows for the epitaxial growth of MOFs on Cu(OH)2. This article describes our recent progress on the fabrication of MOF thin films grown on assemblies of nanostructured Cu(OH)2. The approach enables us to control both position and orientation of MOF crystals on a substrate. The present approach for oriented MOF thin film growth is expanded for the oriented MOF-on-MOF thin films where different types of MOF layers possess epitaxial interfaces. A unique anisotropic plasmon resonance is found in the oriented MOFon- MOF films accommodating Ag nanoparticles. These materials demonstrated here are considered as good candidates for functional porous coatings for solid catalysts, bio-sensors, electrical/optical devises and others.

    DOI: 10.2497/jjspm.67.132

  • Innentitelbild: MOF‐on‐MOF: Oriented Growth of Multiple Layered Thin Films of Metal–Organic Frameworks (Angew. Chem. 21/2019) Reviewed

    Ken Ikigaki, Kenji Okada, Yasuaki Tokudome, Takashi Toyao, Paolo Falcaro, Christian J. Doonan, Masahide Takahashi

    Angewandte Chemie   131 ( 21 )   6856 - 6856   2019.05

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    DOI: 10.1002/ange.201904691

  • MOF‐on‐MOF: Oriented Growth of Multiple Layered Thin Films of Metal–Organic Frameworks Reviewed

    K. Ikigaki, K. Okada, Y. Tokudome, T. Toyao, P. Falcaro, C. Doonan, M. Takahashi

    Angewandte Chemie International Edition 雑誌   131 ( 21 )   6960 - 6964   2019.05

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  • Inside Cover: MOF-on-MOF: Oriented Growth of Multiple Layered Thin Films of Metal-Organic Frameworks (Angew. Chem. Int. Ed. 21/2019) Reviewed

    Ken Ikigaki, Kenji Okada, Yasuaki Tokudome, Takashi Toyao, Paolo Falcaro, Christian J. Doonan, Masahide Takahashi

    Angewandte Chemie International Edition   58 ( 21 )   6784 - 6784   2019.05

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    DOI: 10.1002/anie.201904691

  • MOF‐on‐MOF: Oriented Growth of Multiple Layered Thin Films of Metal–Organic Frameworks Reviewed

    Ken Ikigaki, Kenji Okada, Yasuaki Tokudome, Takashi Toyao, Paolo Falcaro, Christian J. Doonan, Masahide Takahashi

    Angewandte Chemie   131 ( 21 )   6960 - 6964   2019.05

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    DOI: 10.1002/ange.201901707

  • Anisotropic and reversible deformation of mesopores and mesostructures in silica-based films under mechanical stimuli toward adaptive optical components Reviewed

    K. Okada, G. Asakura, T. Yamamoto, Y. Tokudome, M. Takahashi

    ACS Applied Nano Materials 雑誌   2 ( 4 )   2377 - 2382   2019.03

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  • Metal-organic framework thin films from copper hydroxide nano-assemblies Reviewed

    K. Ikigaki, K. Okada, Y. Tokudome, M. Takahashi

    Journal of Sol-Gel Science and Technology 雑誌   89 ( 1 )   128 - 134   2019.01

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    Kind of work:Joint Work  

  • Anisotropic and Reversible Deformation of Mesopores and Mesostructures in Silica-Based Films under Mechanical Stimuli toward Adaptive Optical Components Reviewed

    Okada, K., Asakura, G., Yamamoto, T., Tokudome, Y., Takahashi, M.

    ACS Applied Nano Materials   2 ( 4 )   2377 - 2382   2019( ISSN:2574-0970 ( eISSN:2574-0970

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    Deformation of the mesostructures in surfactant/silica hybrid films and mesoporous silica films prepared on bulky elastomeric substrates is investigated by compressing the substrates along an in-plane direction of the films. The mesostructure in the surfactant/silica hybrid film consists of organized micelles and a silica matrix. The micelles are removed in the mesoporous silica films to leave mesopores. A grazing-incidence small-angle X-ray scattering investigation reveals that the mesostructures with C2mm symmetry anisotropically change under a compressive strain of 6% in both films; shrinkage of the lattice parameters is along the direction of compression and extension in the normal direction. Deformation is reversible below a strain as high as 6%. Anisotropic deformation of the mesostructures results in an anisotropic change of the refractive indices normal and parallel to the direction of the compression. Compression of the surfactant/silica hybrid film induces a decrease of the refractive index parallel to the surface and an increase normal to the surface on the order of 10-3, while an opposite result is observed for the mesoporous silica film. The present finding gives us fundamental insight into the development of adaptive optical components for sensing, attenuation, switching, modulation, shutters, filters, and others in soft-material-based devices.

    DOI: 10.1021/acsanm.9b00269

  • Monolithic SrTiO<inf>3</inf>/titanate nanotube/TiO<inf>2</inf> nanocomposite toward enhanced photocatalytic activity Reviewed

    Okada, K., Takahashi, M.

    Journal of the Ceramic Society of Japan   127 ( 10 )   2019( ISSN:1348-6535

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    DOI: 10.2109/jcersj2.19089

  • MOF-on-MOF: Oriented Growth of Multiple Layered Thin Films of Metal–Organic Frameworks Reviewed

    Ikigaki, K., Okada, K., Tokudome, Y., Toyao, T., Falcaro, P., Doonan, C.J., Takahashi, M.

    Angewandte Chemie - International Edition   58 ( 21 )   6886 - 6890   2019( ISSN:1521-3773 ( eISSN:1521-3773

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    The precise alignment of multiple layers of metal–organic framework (MOF) thin films, or MOF-on-MOF films, over macroscopic length scales is presented. The MOF-on-MOF films are fabricated by epitaxially matching the interface. The first MOF layer (Cu2(BPDC)2, BPDC=biphenyl-4,4′-dicarboxylate) is grown on an oriented Cu(OH)2 film by a “one-pot” approach. Aligned second (Cu2(BDC)2, BDC=benzene 1,4-dicarboxylate, or Cu2(BPYDC)2, BPYDC=2,2′-bipyridine-5,5′-dicarboxylate) MOF layers can be deposited using liquid-phase epitaxy. The co-orientation of the MOF films is confirmed by X-ray diffraction. Importantly, our strategy allows for the synthesis of aligned MOF films, for example, Cu2(BPYDC)2, that cannot be grown on a Cu(OH)2 surface. We show that aligned MOF films furnished with Ag nanoparticles show a unique anisotropic plasmon resonance. Our MOF-on-MOF approach expands the chemistry of heteroepitaxially oriented MOF films and provides a new toolbox for multifunctional porous coatings.

    DOI: 10.1002/anie.201901707

    PubMed

  • High rate capability by sulfur-doping into LiFePO4 matrix Reviewed

    K. Okada, I. Kimura, K. Machida

    RSC Advances 雑誌   8 ( 11 )   5848 - 5853   2018

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  • Electrochemical sensing and catalysis using Cu3(BTC)2 coating electrodes from Cu(OH)2 films Reviewed

    K. Okada, S. Sawai, K. Ikigaki, Y. Tokudome, P. Falcaro, M. Takahashi

    CrystEngComm 雑誌   19 ( 29 )   4194 - 4200   2017

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  • Centimetre scale micropore alignment in ‘single-crystal-like’ Metal-Organic Framework films via hetero-epitaxial growth Reviewed

    P. Falcaro, K. Okada, T. Hara, K. Ikigaki, Y. Tokudome, A. Thornton, A.J. Hill, T. Williams, C. Doonan, M. Takahashi

    Nature Materials 雑誌   16 ( 3 )   342 - 348   2017

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  • Superhydrophobic adhesive surface on titanate nanotube brushes through surface modification by capric acid Reviewed

    K. Okada, Y. Tokudome, M. Takahashi

    Journal of sol-gel science and technology 雑誌   79 ( 2 )   389 - 394   2016

  • Macroporous Titanate Nanotube/TiO2 Monolith for Fast and Large-Capacity Cation Exchange Reviewed

    K. Okada, G. Asakura, A. Nakahira, Y. Tokudome, M. Takahashi

    Chemistry of Materials 雑誌   27 ( 5 )   1885 - 1891   2015

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  • Positioning of the HKUST-1 metal–organic framework (Cu3(BTC)2) through conversion from insoluble Cu-based precursors Reviewed

    T. Toyao, K. Liang, K. Okada, R. Ricco, M. J. Styles, Y. Tokudome, Y. Horiuchi, A. J. Hill, M. Takahashi, M. Matsuoka, P. Falcaro

    Inorganic Chemistry Frontiers 雑誌   2 ( 5 )   434 - 441   2015

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  • Copper conversion into Cu(OH)2 nanotubes for positioning Cu3(BTC)2 MOF crystals: controlling the growth on flat, 3D architecture and patterns Reviewed

    K. Okada, R. Ricco, Y. Tokudome, M. J. Styles, A. J. Hill, M. Takahashi, P. Falcaro

    Advanced Functional Materials 雑誌   24 ( 14 )   1969 - 1977   2014

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  • Micropattern formation by molecular migration via UV-induced dehydration of block copolymer Reviewed

    K. Okada, Y. Tokudome, K. Konstas, R. Makiura, L. Malfatti, P. Innocenzi, H. Ogawa, T. Kanaya, P. Falcaro, M. Takahashi

    Advanced Functional Materials 雑誌   24 ( 19 )   2801 - 2809   2014

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  • Switchable and Reversible Water Adhesion on Superhydrophobic Titanate Nanostructures Fabricated on Soft Substrates: Photopatternable Wettability and Thermomodulatable Adhesivity Reviewed

    Y. Tokudome, K. Okada, A. Nakahira, M. Takahashi

    Journal of Materials Chemistry A 雑誌   65 ( 1 )   36 - 40   2013

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  • Highly oriented growth of titanate nanotubes (TNTs) in micro and confinement spaces on sol–gel derived amorphous TiO2 thin films under moderate hydrothermal condition Reviewed

    K. Okada, Y. Takamatsu, A. Nakahira, Y. Tokudome, M. Takahashi

    Journal of sol-gel science and technology 雑誌   2 ( 1 )   58 - 61   2013

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  • Titanate nanofunnel brushes: toward functional interfacial applications Reviewed

    K. Okada, Y. Tokudome, P. Falcaro, Y. Takamatsu, A. Nakahira, M. Takahashi

    Chemical Communications 雑誌   48 ( 49 )   6130 - 6132   2012

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  • Microfabrication of mesoporous silica encapsulated enzymes using deep X-ray lithography Reviewed

    C. M. Doherty, Y. Gao, B. Marmiroli, H. Amenitsch, F. Lisi, L. Malfatti, K. Okada, M. Takahashi, A. J. Hill, P. Innocenzi, P. Falcaro

    Journal of Materials Chemistry 雑誌   22 ( 32 )   16191 - 16195   2012

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  • Coffee stain-driven self-assembly of mesoporous rings Reviewed

    L. Malfatti, Y. Tokudome, K. Okada, S. Yagi, M. Takahashi, P. Innocenzi

    Microporous and mesoporous materials 雑誌   163   356 - 362   2012

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Books and Other Publications

  • 汎用FT-IR装置に3Dプリンター自作測定ホルダー装着して薄膜中の分子や化学結合の向きを検出

    岡田健司(ディビジョン・トピック)

    化学と工業  2022.06 

  • 無機化合物表面における金属有構造体の配向制御と機能制御 Reviewed

    岡田健司、高橋雅英( Role: Joint author ,  解説)

    日本ゼオライト学会 ゼオライト  2022.01 

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  • 困難とされてきた物質の配向を可能にする新しいアプローチ 金属水酸化物表面の特異な“場”を利用した物質配向

    岡田健司(飛躍する若手研究者)

    化学と工業  2021.12 

  • PCP/MOFおよび各種多孔質材料の作り方,使い方,評価解析 第1章 第5節「MOFのエピタキシャル成長技術によるMOF配向薄膜の合成と応用」

    岡田健司,高橋雅英 (分担執筆)( Role: Joint author)

    株式会社 技術情報協会  2019 

  • 解説「ナノメートルの穴が揃った多孔質MOF薄膜~薄膜に新たな機能を付加できるMOF配向制御~」

    岡田健司( Role: Sole author)

    月刊化学  2017.03 

Presentations

  • 金属有機構造体配向薄膜の作製と異方的機能:マクロスケールで配向したミクロ細孔・骨格の利用 Domestic conference

    岡田 健司, 深津 亜里紗, 高橋 雅英

    日本化学会 第105春季年会(2025)  2025.03  日本化学会

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    Presentation type:Oral presentation (general)  

    Venue:関西大学  

  • 擬ベーマイト上配向カルボン酸分子を基板としたZn系金属有機構造体(MOF)のエピタキシャル成長 Domestic conference

    山口 歩, 岡田 健司, 深津 亜里紗, 高橋 雅英

    日本化学会 第105春季年会(2025)  2025.03  日本化学会

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    Presentation type:Oral presentation (general)  

    Venue:関西大学  

  • 銅水酸化物塩単結晶上における金属有機構造体(MOF)の配向成長 Domestic conference

    小関 友香, 岡田 健司, 深津 亜里紗, 高橋 雅英

    日本化学会 第105春季年会(2025)  2025.03  日本化学会

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    Presentation type:Oral presentation (general)  

    Venue:関西大学  

  • 水酸化銅上でのポルフィリン誘導体金属有機構造体(MOF)配向薄膜の作製 Domestic conference

    齋藤 大, 岡田 健司, 深津 亜里紗, 高橋 雅英

    日本化学会 第105春季年会(2025)  2025.03  日本化学会

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    Presentation type:Oral presentation (general)  

    Venue:関西大学  

  • 配位不飽和サイトを有する金属有機構造体(MOF)の急速な水吸着・脱着 Domestic conference

    土岐 雄人, 岡田 健司, 深津 亜里紗, 高橋 雅英

    日本化学会 第105春季年会(2025)  2025.03  日本化学会

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    Presentation type:Oral presentation (general)  

    Venue:関西大学  

  • Boosting desorption of confined water in metal-organic frameworks using oligomeric liquids Domestic conference

    Meles Zenawi Gebrekidan, Yuto Toki, Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    日本化学会 第105春季年会(2025)  2025.03  日本化学会

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    Presentation type:Oral presentation (general)  

    Venue:関西大学  

  • 無機材料を基板としたMOF配向膜作製と機能開拓 Domestic conference

    岡田健司

    錯体化学若手の会 近畿支部勉強会  2024.11  錯体化学会 近畿支部

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    Presentation type:Oral presentation (invited, special)  

  • Organic-inorganic epitaxial interface on metal hydroxides as scaffold for oriented MOF films with unique properties Invited International conference

    Kenji Okada

    The 1st International Frontier Interdisciplinary Forum on Crystalline Porous Particles  2024.10 

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    Presentation type:Oral presentation (invited, special)  

  • Water harvesting systemの開発に向けた液体アルコール・アミン混合材料の吸脱水特性の解析 Domestic conference

    植山 希, 岡田 健司, 深津 亜里紗, 高橋 雅英

    日本化学会秋季事業 第14回 CSJ化学フェスタ2024  2024.10  日本化学会

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    Presentation type:Poster presentation  

    Venue:タワーホール船堀  

  • 天然由来 DNA と金属イオンの相互作用により形成されたハイドロゲルの機械特性 Domestic conference

    野村 佳澄, 岡田 健司, 深津 亜里紗, 高橋 雅英

    第73回高分子討論会  2024.09  高分子学会

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    Presentation type:Poster presentation  

    Venue:新潟大学  

  • Atmospheric water harvestingを志向したアルコール系液体材料の水吸脱着特性評価 Domestic conference

    深津 亜里紗, 池川 大輔, 岡田 健司, 高橋 雅英

    第73回高分子討論会  2024.09  高分子学会

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    Presentation type:Oral presentation (general)  

    Venue:新潟大学  

  • ⾦属有機構造体薄膜のソルバト/ベイポクロミズム特性を⽤いた⽔中のエタノール濃度検出センサー Domestic conference

    土岐 雄人, 岡田 健司, 深津 亜里紗, 高橋 雅英

    錯体化学会第74回討論会  2024.09  錯体化学会

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    Presentation type:Poster presentation  

    Venue:岐阜大学  

  • γ-AlOOH ナノファイバーを前駆体とした金属有機構造体(MOF)ナノファイバーの合成 Domestic conference

    岡田 健司, 谷本 裕貴, 深津 亜里紗, 高橋 雅英

    日本セラミックス協会第37回秋季シンポジウム  2024.09  日本セラミックス協会

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    Presentation type:Oral presentation (general)  

    Venue:名古屋大学  

  • 原子間力顕微鏡を用いた水酸化銅上での銅パドルホイール型金属有機構造体のヘテロエピタキシャル成長過程観察 Domestic conference

    齋藤 大, 岡田 健司, 深津 亜里紗, 高橋 雅英

    日本セラミックス協会第37回秋季シンポジウム  2024.09  日本セラミックス協会

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    Presentation type:Oral presentation (general)  

    Venue:名古屋大学  

  • Solvato/vapochromism-based sensors by metal-organic frameworks film prepared from inorganic precursors International conference

    Kenji Okada, Yuto Toki, Arisa Fukatsu, Masahide Takahashi

    The 22nd international Sol-Gel conference  2024.09  International Sol-Gel Society

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    Presentation type:Oral presentation (general)  

    Venue:Berlin, Germany  

  • 3D printable and stimuli-responsive DNA hydrogels International conference

    Arisa Fukatsu, Waka Yoshida, Kenji Okada, Masahide Takahashi

    The 22nd international Sol-Gel conference  2024.09  International Sol-Gel Society

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    Presentation type:Oral presentation (general)  

    Venue:Berlin, Germany  

  • Multifunctional Hydrogels from Naturally Occurring DNA for Sustainable Future International conference

    Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    International Commission on Glass Annual meeting 2024  2024.08  International Commission on Glass

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    Presentation type:Oral presentation (general)  

    Venue:Incheon, South Korea  

  • Improved Spinnability on Metal-Organic Framework (MOF) Glass by Incorporating γ-AlOOH Nanobelt Filler International conference

    Kenji Okada, Yusuke Ito, Arisa Fukatsu, Masahide Takahashi

    International Commission on Glass Annual meeting 2024  2024.08  International Commission on Glass

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    Presentation type:Oral presentation (general)  

    Venue:Incheon, South Korea  

  • Multifunctional Hydrogels Composed of Naturally Occurring DNA and Various Metal Ions International conference

    Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    International Conference on Nanospace Materials 2024 Thailand (NANOSPACE2024)  2024.08  Vidyasirimedhi Institute of Science and Technology (VISTEC)

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    Presentation type:Oral presentation (general)  

    Venue:Rayong, Thailand  

  • 金属有機構造体(MOF)の基礎と機能性薄膜としての可能性 Invited Domestic conference

    岡田健司

    MOF【WEBセミナー】  2024.08  R&D支援センター 

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    Presentation type:Public lecture, seminar, tutorial, course, or other speech  

  • 光重合性官能基を有するシングルナノメートルスケールのシリカナノ粒子をインクに使用した3次元光造形 Domestic conference

    日名子 大輝, 阪本 樹, 岡田 健司, 深津 亜里紗, 高橋 雅英

    日本ゾル-ゲル学会 第22回討論会  2024.07  日本ゾル-ゲル学会

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    Presentation type:Poster presentation  

    Venue:東広島芸術文化ホール くらら  

  • 溶液反応を駆使したナノ材料の配向制御と機能開拓 Invited Domestic conference

    岡田 健司

    日本ゾル-ゲル学会 第22回討論会  2024.07  日本ゾル-ゲル学会

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    Presentation type:Oral presentation (invited, special)  

    Venue:東広島芸術文化ホール くらら  

  • 有機シリカ材料への銅イオン添加による有機物燃焼温度の低減 Domestic conference

    大浦 直伸, 深津 亜里紗, 岡田 健司, 神谷 和孝, 高橋 雅英

    日本ゾル-ゲル学会 第22回討論会  2024.07  日本ゾル-ゲル学会

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    Presentation type:Poster presentation  

    Venue:東広島芸術文化ホール くらら  

  • Enhancing water release at lower temperatures in atmospheric water harvesting systems using mixture of MOF and oligomeric liquids International conference

    Meles Zenawi Gebrekidan, Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    9th International Conference on Metal-Organic Frameworks and Open Framework Compounds (MOF2024)  2024.07  International Commission on Metal-Organic Frameworks

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    Presentation type:Poster presentation  

    Venue:Singapore  

  • A sensor detecting the composition of water-ethanol mixtures by solvato/vapochromism of Cu-MOF-74 International conference

    Kenji Okada, Yuto Toki, Arisa Fukatsu, Masahide Takahashi

    9th International Conference on Metal-Organic Frameworks and Open Framework Compounds (MOF2024)  2024.07  International Commission on Metal-Organic Frameworks

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    Presentation type:Oral presentation (general)  

    Venue:Singapore  

  • Epitaxial growth of metal-organic framework on single crystals of copper-based mineral International conference

    Yuka Koseki, Kenji Okada, Arisa Fukatsu, Masahide Takahashi

    9th International Conference on Metal-Organic Frameworks and Open Framework Compounds (MOF2024)  2024.07  International Commission on Metal-Organic Frameworks

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    Presentation type:Poster presentation  

    Venue:Singapore  

▼display all

Collaborative research (seeds) keywords

  • 溶液合成

  • 多孔質材料の合成

  • ナノ材料の合成

Charge of on-campus class subject

  • マテリアル工学実験2

    2024   Weekly class   Undergraduate

  • マテリアル工学概論

    2024   Weekly class   Undergraduate

  • メゾ構造化学特論

    2024   Weekly class   Graduate school

  • 物質化学生命系特別研究第1

    2024   Intensive lecture   Graduate school

  • 物質化学生命系特別演習第1

    2024   Intensive lecture   Graduate school

  • 物質化学生命系特別演習

    2024   Intensive lecture   Graduate school

  • 基礎化学実験

    2024   Weekly class   Graduate school

  • 機能材料科学

    2024   Weekly class   Undergraduate

  • 材料プロセス

    2024   Weekly class   Undergraduate

  • マテリアル工学実験3

    2024   Weekly class   Undergraduate

  • マテリアル工学実験1

    2024   Weekly class   Undergraduate

  • マテリアル工学特論

    2024   Weekly class   Graduate school

  • 物質化学生命系特別研究第2

    2024   Intensive lecture   Graduate school

  • 物質化学生命系特別演習第2

    2024   Intensive lecture   Graduate school

  • 物質化学生命系特別研究

    2024   Intensive lecture   Graduate school

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Other

  • 研究職歴

    2020.11 - Now

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    大阪府立大学大学院工学研究科物質・化学系専攻 准教授

  • 研究職歴

    2017.11 - 2020.10

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    大阪府立大学大学院工学研究科物質・化学系専攻 助教