Wearable Smart Contact Lens Sensors For Monitoring Glucose Wirelessly Using Graphene-Nanowire Hybrid Structures

Abstract

Real-time, wireless tear glucose monitoring of nanosensor integrated on a wearable soft contact lens could play an important role for a diabetic. To realize wearable glucose sensors, the suitable materials and design that can be flexible to apply to soft contact lens, be harmless to humans, and not obstruct the field of vision are required. Here, we present a transparent, flexible and ultrasensitive glucose sensor based on hybrid nanostructures of 1-dimensional (1D) and 2-dimensional (2D) nanomaterials. Our glucose sensor with graphene-silver nanowire hybrid nanostructures exhibits high transparency, superb flexible and stretchable characteristics, and enables the detection of tear glucose concentration. As integrating antenna with hybrid structure on soft contact lens, it is possible to detect glucose concentration wirelessly. Furthermore, in vivo testes on a live rabbit show that our glucose sensor can be applicable to biological systems.