Paper Title
Development of Graphene-Based Screen-Printed Electrochemical Sensor

Abstract
Graphene, an atomically thick graphitic layer, has attracted great interest in many fields due to its extraordinary electrical, chemical and mechanical properties. In particular, graphene is a highly promising material for electrochemical sensing because it possesses a much larger specific surface area and an excellent electrical conductivity compared with other carbon based materials. In this study, we developed a disposable screen-printed carbongraphene electrode for electrochemical sensing. The direct incorporation of graphene into carbon paste electrodes resulted in increased reactive surface area, electronic mobility and electron transfer rate for electrochemical sensing. The electrochemical response of the screen-printed carbongraphene electrodes were analysed by measuring cyclic voltammetry with potassium ferricyanide as redox probe. The peak current at the carbongraphene composite electrode was ~2 times higher than the carbon electrode. The increased peak current at carbongraphene electrode indicates that the graphene enhanced the electron transfer rate. The experimental results exhibited the superiority of carbongraphene electrode to carbon electrode, and the potential of graphene as a new generation of electrochemical sensing platform. The electrodes can be fabricated with low-cost and mass-produced. Therefore, the developed screen printed graphene/carbon composite is highly promising for advanced electrochemical detection. Keywords- Graphene; Screen-printing; Electrochemical detection; Cyclic voltammetry