![]() A macroscopic viscosity oscillation of a concentrated polymer solution (15 wt. %) coupled with the periodic microphase separation is also demonstrated. The periodic structural transition of the diblock copolymer in a dilute solution ( = 0.1 wt. %) is closely investigated in terms of the time-resolved dynamic light scattering technique at constant temperature in the bistable region. 25 ☌) large enough to cause stable self-oscillation can be prepared. When these dual-functionalized gels are exposed to non-uniform illumination, the localized contraction of the gel (due to the SP moieties) in the presence of traveling chemical waves (due to the BZ reaction) leads to new forms of spontaneous, self-sustained movement, which cannot be achieved by either of the mono-functionalized = (ca. Importantly, both the SP moieties and the BZ reaction are photosensitive. These gels contain both spirobenzopyran (SP) chromophores and the ruthenium catalysts that drive the oscillatory Belousov-Zhabotinsky (BZ) reaction. ![]() The microvalves were prepared by in-situ polymerization of photoresponsive gel composed of PNIPAM functionalized with spirobenzopyran chromophore in the microchannel, and the microvalves are opened by shrinkage of the gels under blue light. Herein, we develop a computational model to design a new class of polymer gels where structural reconfigurations and internalized reactions are intimately linked to produce autonomous motion, which can be directed with light. developed a photoresponsive polymer gel microvalve through the local light irradiation. Moreover, for practical applications, this bio-inspired motion must be readily controllable. TERADA, Masahiro 4E4 - 20 Synthesis of Benzofuran derivatives by the. One of the challenges in the field of biomimicry is eliciting this form of motion from purely synthetic materials, which typically do not generate internalized reactions to drive mechanical action. 2A6- 17, 2A6- 18, 2A6- 19, 2A6- 20 2A6 - 15 Doping of Spiro-OMeTAD with TEMPO. Compared to these collapsed ends, the central region is relatively swollen. Taku Satoh, Kimio Sumaru, Toshiyuki Takagi and Toshiyuki Kanamori, Soft Matter, 2011, DOI: 10.Human motion is enabled by the concerted expansion and contraction of interconnected muscles that are powered by inherent biochemical reactions. Due to the spirobenzopyran chromophores, the illuminated ends of the gel shrink. Rates of reswelling from the light-induced shrunken state of the spirobenzopyran-functionalized gels increased with increasing ring-opening rates of spirobenzopyrans in the gels. Stimuli-responsive hydrogels: Researchers have functionalised poly(N-isopropylacrylamide) gel with spirobenzopyrans and evaluated the effects of spontaneous ring-opening rates of the photo-chromic molecules on the light-responsive volume change of the subsequent gels. ![]() Keiki Kishikawa, Takahiro Inoue, Yoshiyuki Sasaki, Sumihiro Aikyo, Masahiro Takahashi and Shigeo Kohmoto, Soft Matter, 2011, 7, 7532-7538, DOI: 10.1039/C1SM05887H The slow rotation of the molecules showed unique phenomena such as no clear odd–even effect in their clearing and melting points. Thermal liquid crystal phases: An interaction assisted approach for realization of biaxiality in smectic A phases is demonstrated in addition to the effectiveness of perfluoroarene-arene and C-H/F interactions as the intermolecular interactions. ![]() The triggered response of the hydrogels is discussed and a focus is placed on formulation principles, and on how the physicochemical properties of such hydrogels influence their antimicrobial/antiviral action. The closed, colourless, hydrophobic form referred often as benzospiropyran and the open, coloured, charged merocyanine form. Antimicrobial and antiviral hydrogels: This brief review provides some illustrative examples of different types of antimicrobial (antibacterial/antifungal) and antiviral hydrogels. Variations of spiropyran molecules based on the core structure of 1,3,3-trimethylspiro chromene-2,2-indoline can exist in two distinctively different forms. ![]()
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