2024/04/01 更新

写真a

オカダ ケンジ
岡田 健司
Okada Kenji
担当
大学院工学研究科 物質化学生命系専攻 准教授
工学部 マテリアル工学科
職名
准教授
所属
工学研究院

担当・職階

  • 大学院工学研究科 物質化学生命系専攻 

    准教授  2022年04月 - 継続中

  • 工学部 マテリアル工学科 

    准教授  2022年04月 - 継続中

取得学位

  • 博士(工学) ( 大阪府立大学 )

研究分野

  • ナノテク・材料 / ナノ材料科学

  • ナノテク・材料 / 無機物質、無機材料化学

  • ナノテク・材料 / 有機機能材料

  • ナノテク・材料 / 無機材料、物性

  • ナノテク・材料 / 無機物質、無機材料化学

研究キーワード

  • 有機/無機界面

  • 金属有機構造体

  • 配向薄膜

  • 無機材料

  • 多孔質材料

  • ナノ材料

研究概要

  • 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

研究歴

  • 無機材料の表面化学構造を反映した材料合成

    国際共同研究

    2020年04月 - 継続中 

  • 金属水酸化物擬単結晶薄膜の形成と機能創出

    機関内共同研究

    2018 - 継続中 

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

    国際共同研究

    2017 - 継続中 

所属学協会

  • 日本化学会

    2018年03月 - 継続中   国内

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

    2011年06月 - 継続中   国外

  • 日本ゾル-ゲル学会

    2011年04月 - 継続中   国内

  • 日本セラミックス協会

    2011年04月 - 継続中

委員歴(学外)

  • 2021度行事企画委員会   日本セラミックス協会  

    2021年04月 - 継続中 

受賞歴

  • 進歩賞

    2024年03月   日本化学会  

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    受賞国:日本国

  • ”2021 Emerging Investigator”

    2021年09月   Journal of Materials Chemistry A  

  • 第34回の若い世代の特別講演会

    2021年03月   日本化学会  

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    受賞国:日本国

  • Global Session Best Presentation Award

    2021年03月   The 59th Ceramics Basic Science Symposium  

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    受賞国:日本国

  • Global Session Best Presentation Award

    2021年01月   The 59th Ceramics Basic Science Symposium  

  • 日本セラミックス協会 進歩賞

    2019年11月   日本セラミックス協会  

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    受賞国:日本国

  • 第13回 日本ゾル-ゲル学会『Best Poster award』

    2015年11月   日本ゾル-ゲル学会  

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    受賞国:日本国

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

    2015年09月   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年06月   粉体粉末冶金学会  

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    受賞国:日本国

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

    2014年06月   SiO2 Advanced Dielectrics and Related Devices Ⅹ International Symposium  

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

    2013年05月   CSIRO Intelligent Processing Symposium and Workshop  

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

    2012年09月   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年03月   日本表面科学会関西支部  

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    受賞国:日本国

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

    2011年09月   International Sol-Gel Society  

▼全件表示

職務経歴(学外)

  • 大阪公立大学   大学院工学研究科 物質・化学系専攻

    2022年04月 - 継続中

  • 大阪府立大学   大学院工学研究科 物質・化学系専攻

    2020年11月 - 2022年03月

  • 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年10月 - 継続中

  • 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年10月 - 継続中

  • 大阪府立大学   大学院工学研究科 物質・化学系専攻

    2017年11月 - 2020年10月

  • 大阪大学大学院工学研究科応用化学専攻 助教

    2015年11月 - 2017年10月

  • 日本学術振興会特別研究員(PD)

    2014年10月 - 2015年10月

  • 日本学術振興会特別研究員(DC1)

    2013年04月 - 2014年09月

▼全件表示

論文

  • ポリマー上における銀ナノ粒子含有金属有機構造体薄膜の形成による光応答ソフトアクチュエータの作製 査読

    小関 友香, 真下 理彩, 深津 亜里紗, 岡田 健司, 髙橋 雅英

    2024年01月

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    担当区分:責任著者   国際・国内誌:国内誌  

    DOI: 10.2497/jjspm.23-00070

  • 天然由来DNAと金ナノ粒子との複合化の足場となる白金リンカー錯体の合成 査読

    2024年01月

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    国際・国内誌:国内誌  

    DOI: 10.2497/jjspm.23-00071

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

    Daisuke Ikegawa, Arisa Fukatsu, Kenji Okada, Masahide Takahashi

    ACS Omega   2024年01月

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1021/acsomega.3c07310

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

    2023年10月

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    掲載種別:研究論文(学術雑誌)   国際・国内誌:国際誌  

    DOI: 10.2109/jcersj2.23119

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

    K. Okada, R. Mashita, A. Fukatsu, M. Takahashi

    Nanoscale Advances   5 ( 6 )   1795 - 1801   2023年02月

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1039/D2NA00882C

  • Alcohol-induced deboronation of organoborosilicate thin films 査読

    Arisa Fukatsu, Ayana Karim, Kenji Okada, Masahide Takahashi

    Journal of Sol-Gel Science and Technology   104 ( 3 )   485 - 489   2022年12月( ISSN:0928-0707

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1007/s10971-022-05897-8

    その他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 査読

    B. Baumgartner, R. Mashita, A. Fukatsu, K. Okada, M. Takahashi

    Angewandte Chemie International Edition   61 ( 28 )   e202201725   2022年07月( ISSN:1433-7851

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1002/anie.202201725

    その他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 査読

    S. Sakamoto, K. Okada, S. Tanaka, Y. Kotera, A. Fukatsu, M. Takahashi

    Chemistry Letters   51 ( 6 )   605 - 609   2022年06月( ISSN:0366-7022

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1246/cl.220108

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

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

    Angewandte Chemie   2022年05月

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1002/ange.202201725

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

    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年04月( ISSN:0928-0707

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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 査読

    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年10月( ISSN:2196-7350

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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

    その他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 査読

    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年10月

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    共著区分:共著  

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

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

    Chemical Science 雑誌   12 ( 27 )   9298 - 9308   2021年05月

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    共著区分:共著  

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

    K. Ikigaki, K. Okada, M. Takahashi

    ACS Applied Nano Materials 雑誌   2021年

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    共著区分:共著  

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

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

    Applied Clay Science 雑誌   203   2021年

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    共著区分:共著  

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

    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年

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    共著区分:共著  

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

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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 査読

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1016/j.clay.2021.106006

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

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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 査読

    Kenji Okada, Keyaki Mori, Arisa Fukatsu, Masahide Takahashi

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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 査読

    Bettina Baumgartner, Ken Ikigaki, Kenji Okada, Masahide Takahashi

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    <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

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

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

    Chemical Science 雑誌   11 ( 30 )   8005 - 8012   2020年

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    共著区分:共著  

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

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

    RSC Advances 雑誌   10 ( 47 )   28032 - 28036   2020年

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    共著区分:共著  

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

    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年

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    共著区分:共著  

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

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

    Molecules 雑誌   25 ( 1 )   2020年

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    共著区分:共著  

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

    K. Okada

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

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    共著区分:単著  

  • 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 査読

    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年

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    共著区分:共著  

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

    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年

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    共著区分:共著  

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

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    © 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 査読

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    © 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 査読

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    © 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) 査読

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    © 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 査読

    Okada, K.

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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 査読

    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年( ISSN:2046-2069

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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 査読

    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年( ISSN:0532-8799

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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) 査読

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

    Angewandte Chemie   131 ( 21 )   6856 - 6856   2019年05月

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1002/ange.201904691

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

    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年05月

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    共著区分:共著  

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

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

    Angewandte Chemie International Edition   58 ( 21 )   6784 - 6784   2019年05月

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1002/anie.201904691

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

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

    Angewandte Chemie   131 ( 21 )   6960 - 6964   2019年05月

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1002/ange.201901707

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

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

    ACS Applied Nano Materials 雑誌   2 ( 4 )   2377 - 2382   2019年03月

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    共著区分:共著  

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

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

    Journal of Sol-Gel Science and Technology 雑誌   89 ( 1 )   128 - 134   2019年01月

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    共著区分:共著  

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

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    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 査読

    Okada, K., Takahashi, M.

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.2109/jcersj2.19089

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

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

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

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    掲載種別:研究論文(学術雑誌)   共著区分:共著   国際・国内誌:国際誌  

    DOI: 10.1002/anie.201901707

    PubMed

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

    K. Okada, I. Kimura, K. Machida

    RSC Advances 雑誌   8 ( 11 )   5848 - 5853   2018年

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    共著区分:共著  

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

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

    CrystEngComm 雑誌   19 ( 29 )   4194 - 4200   2017年

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    共著区分:共著  

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

    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年

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    共著区分:共著  

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

    K. Okada, Y. Tokudome, M. Takahashi

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

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

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

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

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    共著区分:共著  

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

    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年

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    共著区分:共著  

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

    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年

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    共著区分:共著  

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

    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年

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    共著区分:共著  

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

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

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

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    共著区分:共著  

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

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

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

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    共著区分:共著  

  • Titanate nanofunnel brushes: toward functional interfacial applications 査読

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

    Chemical Communications 雑誌   48 ( 49 )   6130 - 6132   2012年

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    共著区分:共著  

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

    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年

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    共著区分:共著  

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

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

    Microporous and mesoporous materials 雑誌   163   356 - 362   2012年

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    共著区分:共著  

▼全件表示

書籍等出版物

  • 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( 範囲: ディビジョン・トピック)

    化学と工業  2022年06月 

  • 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 査読

    岡田健司、高橋雅英( 担当: 共著 ,  範囲: 解説)

    日本ゼオライト学会 ゼオライト  2022年01月 

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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( 範囲: 飛躍する若手研究者)

    化学と工業  2021年12月 

  • 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( 担当: 単著)

    月刊化学  2017年03月 

産学官連携可能研究(シーズ)キーワード

  • 溶液合成

  • 多孔質材料の合成

  • ナノ材料の合成

その他

  • 研究職歴

    2020年11月 - 継続中

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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年11月 - 2020年10月

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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