Graphene oxide is a unique nanoscale object with tunable electronic properties, largely influenced by the presence of oxygen functional groups located on the basal plane [1-3]. In this work shine light on the nanoscale charge density and dynamics of isolated GO nanosheets, probed by Kelvin Probe Microscopy [4]. We visualize the existence of charge-domains with respective charge interactions. We further reveal short range fluctuations of jumping electrons and the existence of very long-term relaxation times. The experimental findings are consistent with theoretical simulations, underlining that graphene oxide needs to be understood in terms of an electron glass revealing hopping transport between charge-domains.

Spanish MICINN/AEI: Projects PID2019-104272RB-C51/AEI/10.13039/501100011033 and PID2019-104272RB-C52/AEI/10.13039/501100011033; Government of Aragón: Grupos Reconocidos DGA T03_20R.

Resumen del póster presentado en el congreso ChemOnTubes 2022, celebrado en Donostia-San Sebastián (España), del 24 al 28 de abril.