A Self-Supported Flexible Electrode Based on Graphene Modified Carbon Cloth for Glucose Detection

Exploring flexible electrode materials with good robustness and stability is essential in developing sensor devices for biomedical applications. Here we fabricate a new type flexible electrode based on graphene modified carbon cloth. Graphene nano-sheets (GNSs) were in situ grown vertically on the surface of carbon cloth (CC) via thermal chemical vapor deposition (CVD). The GNSs/CC composite was characterized by Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), Raman spectrometry and cyclic voltammetry (CV). Decent enzyme loading capacity of GNSs/CC was confirmed by doping of glucose oxidase (GOD), which transformed this flexible composite material into a biological electrochemical sensor. Detection of glucose yielded remarkable sensitivity of 85 μA mM ^-1 cm ^-2 in the linear range of 0.01~0.5 mM.