Graphene oxide and poly(3-hexylthiophene) nanoscale interface interactions probed by KPFM

Abstract

Graphene oxide (GO) is a chemically modified form of graphene containing many different types of oxygen functional groups on its basal plane and edges. Their presence imparts hydrophilicity and allows for ease of processing from water dispersions. We recently have shown that sheets of graphene oxide critically affect the aggregate structure of water dispersible nanoparticles P3HTNPs and thus the performance of optoelectronic thin film devices. In this work we elucidate the photogenerated charge tranfer dynamics of (P3HTNPs-GO) ensembles with defined aggregate structure across their interface by Kelvin Probe Force microscopy (KPFM).