- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Photo-control of poly(N-[4-[(4-Nitrophenyl)azo]phenyl]acrylamide) brushes on graphene oxide coated silicon surface
摘要： Poly(N-[4-[(4-Nitrophenyl)azo]phenyl]acrylamide [poly(NPAPAA)] brushes were obtained via interface-mediated reversible addition–fragmentation chain transfer polymerization to design new photoresponsive surface on the graphene oxide coated silicon substrate. Switchable surface wettability was controlled successfully by these densely packed polymer brushes using light as the exterior stimulation. The relatively nonpolar trans azobenzene polymer brushes were converted to a polar cis form (with a larger dipole moment) utilizing light of the suitable wavelength. This conversion is reversible and can be switched back by employing visible light. Cis–trans photo-induced isomerization provided a reversible contact angle change (~ 9o) with UV and visible light for the poly(NPAPAA) brushes under successive irradiation cycles. This study may be promised to control cell culture surface without leaving any residual in terms of alternative medicine.
关键词： Interface-mediated RAFT polymerization,Photoresponsive polymer brushes,Switchable surface wettability
更新于2025-09-09 09:28:46
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Photoinduced mechanical motions of biferrocene-containing pseudorotaxane crystals
摘要： This study presents photoresponsive, dynamic pseudorotaxane crystals composed of axle molecules containing biferrocene or ferrocene groups threaded through a dibenzo[24]crown-8 ether ring. A biferrocene-containing pseudorotaxane crystal is used for photomechanical conversion under 445-nm laser irradiation and provides a lifting force that is 2900 times the weight of the crystal itself.
关键词： photomechanical conversion,biferrocene,ferrocene,photoresponsive,pseudorotaxane
更新于2025-09-09 09:28:46