X-RAY REFLECTIVITY STUDY OF GRAPHENE OXIDE ASSEMBLY AT THE AIR-LIUQID INTERFACE

The current proposal focuses on characterizing the behavior of pristine and modified graphene oxide (GO) nanoflakes at the air-liquid interface. A thin GO layer can be effectively utilized in applications such as transparent conductors, sensors, et al. Langmuir-Blodgett (LB) is a widely used technique for thin film deposition. However, conventional LB deposition often results in the folding and overlapping of GO nanosheets before achieving continuous layers. This effect is influenced by edge-to-edge negatively charged interactions of GO nanoflakes, governed by the presence of ionized carboxylic acid groups. Carboxylic groups can be employed to modify GO nanoflakes with amino molecules, altering charge and van der Waals interactions. The proposal aims to use XRR and GIWAXS techniques to study GO assembly at the air-liquid interface. The results will help determine the composition of modified or reduced GO nanoflakes and experimental conditions for defect-free layer formation.