Hokkaido University · 재료과학
타지마 교수의 연구실은 광학 스위칭 소자 및 생분해성 고분자 합성 분야에서 주로 활동하고 있습니다. 고속 전기적 제어 없이도 초고속으로 작동하는 편광 분별형 마흐-젠더 간섭계 기반 온오파이트 스위치 개발에 성공하였으며, 동시에 생물학적 기반 소재인 나노섬유화 박테리아 셀룰로오스와 폴리(3-하이드록시부티레이트) 등의 생합성 반응 메커니즘을 규명하고 있습니다. 특히 수용성-유기용매 이상반응계를 활용한 고분자 합성 및 표면 기능화 기술을 통해 환경 친화적인 신소재 개발에 기여하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
We propose a polarization-discriminating Mach-Zehnder (PDMZ) all-optical switch. The switching speed of this PDMZ all-optical switch is not limited by the slow relaxation time of highly efficient incoherent nonlinearities. We demonstrate a squarelike modulation characteristic, which is necessary in most switching applications, at a switching speed (on-off time) of 40 ps. We also demonstrate ultrafast switching at a detector limited speed of ∼8 ps.
Surface modification of nanofibrillated bacterial cellulose (NFBC) with methyltrimethoxysilane was performed in water to hydrophobize its surface. A series of cellulose samples with different degrees of molar substitution of methyltrimethoxysilane was prepared by changing the NFBC:methyltrimethoxysilane ratio in the preparation. Detailed structural characterization of these samples, including their degrees of molar substitution and crystallinity, was conducted by X-ray diffraction, Fourier-trans
In our previous paper, we synthesized poly-3-hydroxybutyrate [P(3HB)] by using the water-organic-solvent two-phase reaction system (TPRS), in which (R)-3-hydroxybutyrylCoA [(R)-3HBCoA] was continuously supplied to PHA synthase by the ester exchange reaction between CoA and thiophenol in thiophenyl (R)-3HB [(R)-3HBTP]. By applying TPRS to the screening, we found a lactate- (LA-) polymerizing enzyme from PHA synthases. The enzyme was an engineered PHA synthase, which stereoselectively copolymerize
