Cost-efficient Printing of Graphene Nanostructures on Smart Contact Lenses

Smart contact lenses have been put forward for years, but there is still no commercial product in the market, the high cost bring by the expensive fabrication techniques could be one of the reasons. In this paper, firstly, a cost-efficient and reliable route to fabricate graphene grating on contact lens was designed and demonstrated based on direct laser interference pattering graphene film on commercial contact lenses using an Nd:YAG laser. The thickness of film and interference angle have been taken into consideration. Optical characterization and simulation have been applied to evaluate the quality of our final achieved grating patterns with grating size from 0.92 um to 3.04 um. 2D patterns could also be obtained through double-time laser interference. Contact angles for samples with different interference angle were presented considered the service environment of the smart contact lenses. And of course, the conductivity of the samples was evaluated using a four-probe method. The most conductive sample...