Conductive polymer-based electrochromic soft contact lens

摘要

Combining biocompatible, flexible, conducting polymers with hydrogels is highlyattractive for future biomedical devices, including implanted electronics and wearableelectronics. Previously, we have succeeded a printing of conductive polymer on hydrogels1and a bonding of metals/hydrogels2 with electrochemical polymerization of conductivepolymer. Here, we develop a conductive polymer-based electrochromic soft contact lens toblock a sun light or widen eye’s iris. To this end, we fabricate first a PEDOT/PSS film includingpolyurethane, ethylene glycol and dodecyl benzenesulfonic acid with spin coating. After that,we cut the conductive films: one is circular film and the other is ring film. Both films aremounted on commercial available soft contact lens with electrochemical polymerization.Such electrochemical bonding provides good adhesion even we wash the lens with myforefinger. When we applied a positive voltage to the film, the film is dopedelectrochemically and change a color from transparency to dark blue. In contrast, whenapplying a negative voltage, we observe an original transparency. This reversible behaviorcan be observed during several repeated cycles. The deepness of film color depends on theapplied potential and the thickness of films (see Fig.1). In my presentation, I will discuss thedetail about experimental results.