Energy-efficient Flexible Ammonia Sensors Enabled by Polypyrrole-Graphene

Two Dimensional (2D) materials and their combination with conductive polymers are emerging candidates for high-performance gas sensing with desirable mechanical flexibility. It is of great importance to understand the influence of applied strain to the sensing performance of such flexible sensors. In this work, we investigated the combination of graphene and polypyrrole (PPy) as flexible sensor de...