The Effect of ZnO Transfer to Graphene Layer as ZnO/Graphene Nanocomposite: A Potential pH Sensor

Abstract

The accurate measurement and monitoring of pH levels are crucial in various fields, including environmental monitoring, healthcare, and industrial processes. However, the development of an efficient graphene-based pH sensor with enhanced sensitivity, wide sensing range, and long-term stability remains a challenge. The objective of this research project is fourfold: firstly, to fabricate graphene through Thermal Chemical Vapor Deposition (TCVD) using waste engine oil (WEO) as a carbon precursor; secondly, to transfer graphene onto Indium Tin Oxide (ITO) substrate. Thirdly, to fabricate ZnO/Graphene nanocomposites through a transfer process; and finally, to characterize the structural, optical, and bonding properties of the nanocomposites. The primary focus of this study lies in investigating the effect of transferring ZnO onto a graphene layer as a ZnO/Graphene nanocomposite on the structural, optical, and bonding properties of graphene, with the goal of evaluating its potential as a pH sensor.