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2015.03.23

【Awards and Commendations】 Younsoo KIM in the Department of Chemistry and Biotechnology, won a Excellent Poster Presentation Award in the MANA International symposium 2015.

Younsoo KIM in the Department of Chemistry and Biotechnology, won a Excellent Poster Presentation Award in the MANA International symposium 2015.

 Recently, we found that unilamellar titania nanosheets, dispersed in water, are oriented perpendicular to the flux line of magnetic field.  Through in-situ polymerization of acryl monomer in the dispersion, the aligned structure can be chemically locked in the hydrogel network.  Based on this strategy, we fabricated a thermoresponsive hydrogel by hybridization of poly-N-isopropylacrylamide with uniformly aligned titania nanosheets.  The resultant hydrogel showed anisotropic and anomalous swelling/deswelling behavior in response to temperature changes below or above LCST. Unlike conventional actuators, this deformation is realized by an unprecedented mechanism, where a repulsive force among TiNSs is physically modulated by a change in permittivity of the gelling water synchronous with thermal hydration and dehydration of a NIPAM gel network.

It is big honor to receive this award. I would like to express my deepest gratitude to Prof. Takuzo Aida and Dr. Ishida Yasuhiro, and also our lab members for all of their support. I`d like to take this opportunity to activate and poromote my research.