Photochemical switching of hydrogel film properties

High clay content nanocomposite hydrogels with surprising mechanical strength and interesting deswelling kinetics

“…Poly(N-isopropylacrylamide) gel (PNIPAAm), as well-known temperature sensitive hydrogels, have been investigated systematically since 1980's [6][7][8][9][10][11][12][13]. Many researchers focus on improving its response rate in different ways [14], like using, thin layers or small particles [15][16][17], cold-treatment [18], introducing macro-or nanoporous structures [19,20], grafting polymers, hydrophobic crosslinkers [21], with hydrophilic silica as nanosized water reservoirs [22] or preparing gels in organic/water mixture media [23] etc. Although fast responsive rate is important in many applications.…”

Water Soluble Onium Salt Type Photo Amphoteric Compound Generators

“…Typically, photo-crosslinking by photo-dimerization [27,28] and radical reaction [29] are known in negative photoresists. In the reference 28, photochemical switching of hydrogel film properties was reported.…”

Surface plasmon optical study of the interfacial phase transition of elastinlike polypeptide grafted on gold

“…The transition is completely reversible upon cooling 2. The LCST transition of ELPs can also be isothermally triggered by other external stimuli such as changes in ionic strength,12 p H,13 electric field,14 light,15 or the addition of chemical or biological analytes 16,17…”