AI Article Synopsis
- Graphene was created using a method called chemical vapor deposition with polystyrene as the carbon source, where the number of layers could be controlled by adjusting the polystyrene weight at high temperatures.
- Silver nanoparticles were added to the graphene using a citrate reduction method, and analysis showed that the interaction between silver and graphene leads to n-type doping, improving its electrical properties.
- The resulting four-layer graphene with silver doping demonstrated a low sheet resistance and high light transmittance, surpassing current industry standards for materials like indium tin oxide, while also offering better stability and protection for the silver layer.
Article Abstract
Graphene was synthesized by chemical vapor deposition using polystyrene as the solid carbon source. The number of graphene layers could be controlled by regulating the weight of polystyrene under atmospheric pressure at 1000 °C. Silver nanoparticles were then deposited on the graphene by a citrate reduction method. The interaction between graphene and silver was investigated by suface-enhanced Raman scattering spectra and X-ray photoelectron spectroscopy. The change in the G band position indicates n-type doping of the graphene due to an interaction between the silver and the graphene. Silver interlayer doped four-layer graphene shows a sheet resistance of 63 Ω/sq and a light transmittance of 85.4% at 550 nm. The optical and electrical quality of graphene exceeds the minimum industry standard for indium tin oxide replacement materials. It is clearly understood that the environmental sheet resistance stability of the interlayer doped graphene film is better than that of surface doped graphene sheets. The presence of graphene at the surface also acts as a protective layer for the inner silver ions and clusters.
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