Controlling the LCST-Phase Transition in Azobenzene-Functionalized Poly (-Isopropylacrlyamide) Hydrogels by Light.

Poly(-isopropylacrylamide) PNIPAAm hydrogels were modified with a new azobenzene-containing co-monomer. In this work, light responsiveness as an additional functionality, is conceptualized to induce two phase transitions in the same material, which can be controlled by light. For a hydrogel with merely 2.