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

<p>Soft actuators are gaining attention as flexible components for soft robotics. Responsive materials that respond to external stimuli such as light are often used as the driving part of the soft actuator. For example, thermo-responsive soft actuators are fabricated by bilayer polymer films of different thermal expansion coefficients. Heating of such bilayer polymer films by plasmon heating enables the soft actuators to be driven remotely by light. In the present study, we report the fabrication of plasmonic heating driven responsive soft actuators by using metal-organic framework (MOF) thin films as supports of plasmonic nanoparticles. The thin films of Cu₂(bpydc)₂ (bpydc = 2,2’-bipyridine-5,5’-dicarboxylate) of which metal ion adsorption capacity is high were fabricated on Cu₂(bpdc)₂ (bpdc = 4,4’-biphenyldicarboxylate) which grown on ceramics precursor, Cu(OH)₂. The actuating was operated by plasmon heating of Ag nanoparticles contained in MOF thin films inserted in between the two polymers, PDMS (poly(dimethylsiloxane)) and PVDC (poly(vinylidene chloride)). Two polymers have different thermal expansion coefficient so that they work as soft actuators by plasmon heating. Such fabrication process of soft actuators would pave the way for development of advanced devices in the field of soft robotics.</p>

DOI： 10.2497/jjspm.23-00070

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

<p>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.</p>

DOI： 10.2497/jjspm.23-00071

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

DOI： 10.1021/acsomega.3c07310

PubMed

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

Immobilised iron complex catalysts with hydrophobic reaction fields mimicking the active sites of enzymes constructed into the mesopores of SBA-15. Surface modification with a longer fluoroalkyl chain and Me₃Si group improves catalytic activity.

DOI： 10.1039/D3CY00698K

Publishing type：Research paper (scientific journal)   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

PubMed

Authorship：Lead author   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Kind of work：Joint Work   International / domestic magazine：Domestic journal  

Authorship：Lead author   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Kind of work：Joint Work   International / domestic magazine：Domestic journal  

Authorship：Lead author   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)   Kind of work：Joint Work   International / domestic magazine：International journal  

Type：Lecture