Wavelength-Selective Softening of Hydrogel Networks

  • Pelloth, Jessica L.
  • Tran, Phong A.
  • Walther, Andreas
  • Goldmann, Anja S.
  • Frisch, Hendrik
  • Truong, Vinh X.
  • Barner-Kowollik, Christopher
Publication date
October 2021
Publisher
Wiley-Blackwell

Abstract

Photoresponsive hydrogels hold key potential in advanced biomedical applications including tissue engineering, regenerative medicine, and drug delivery, as well as intricately engineered functions such as biosensing, soft robotics, and bioelectronics. Herein, the wavelength-dependent degradation of bio-orthogonal poly(ethylene glycol) hydrogels is reported, using three selective activation levels. Specifically, three chromophores are exploited, that is, ortho-nitrobenzene, dimethyl aminobenzene, and bimane, each absorbing light at different wavelengths. By examining their photochemical action plots, the wavelength-dependent reactivity of the photocleavable moieties is determined. The wavelength-selective addressability of individual photore...

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