Colloidal Hydrogel Dynamically Tunable Microlenses

Lyon s group explored the application of hydrogels on dynamically tunable microlenses [20-22]. Poly (N-isopropylacrylamide) hydrogel materials can respond to external stimuli such as temperature, pH, ionic strength, electric field, and antibody-antigen interactions by swelling or shrinking transitions 

SEM image of hydrogel microlens array taken at grazing angle with respect to substrate. The microgels formed an ordered array of planoconvex shapes. Source Kim, M.J. Serpe, and L.A. Lyon. 2004. Journal of the American Chemical Society, 126(31), 9512-9513. With permission.) 

5 Liquid Microlenses Tuned by Environmental Stimuli-Responsive Hydrogels 

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