Physical and Electrical Properties of Spray Coating Graphene Films: The Effect of Solution Concentration

Graphene nanofilms were deposited by the spray coating method at different concentrations (0.05, 0.1, 0.2, 0.3, 0.4, and 0.5 g) prepared 120°C. The characterized in terms of their structural, morphological, optical, electrical properties. results confirm formation high-purity high-crystallinity graphene with a layered nanosheet morphology. X-ray diffraction pattern shows presence pure (002) crystal planes. SEM Images show that intended films are symmetrical few wrinkles on surface. semi-transparent behavior maximum transmission 50%. Raman spectroscopy relative intensity, position, shape G 2D peaks change number layers. conductivity increases temperature, can be further increased depending metal or oxide functionalization. film concentration 0.3 g was significantly higher than values reported for other concentrations. this study suggest physical properties spray-coated optimized controlling solution concentration, which could have potential applications transparent conductive films.