Study of structural and optical properties of low temperature photo-activated ZnO-rGO composite thin film. (July 2017)

• Record Type: Journal Article
• Authors: Chakraborty, Abhisek; Agresti, Antonio; Pizzoferrato, Roberto; Matteis, Fabio De; Orsini, Andrea; Medaglia, Pier Gianni
• Is Part Of: Materials research bulletin. Volume 91(2017)
• Page Start: 227
• Page End: 231
• Publication Date: 2017-07
• Subjects: Zinc oxide -- Reduced graphene oxide -- Sol-gel -- UV-assisted reduction -- Thin film; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.03.030
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Abstract: Zinc oxide-reduced graphene oxide (ZnO-rGO) nanocomposite thin films were fabricated by dip-coating various substrates with a homogeneous dispersion of graphene oxide powder in a sol-gel derived ethanolic solution of zinc acetate and subsequent photo-annealing with deep-ultraviolet radiation. For comparison, ZnO thin films and ZnO-rGO thin films thermally annealed at 500 °C were also prepared. The low temperature deep-ultraviolet irradiation resulted in crystallization of ZnO and reduction of graphene oxide which was confirmed by x-ray diffraction and Raman spectroscopy. Moreover, the Raman spectra also revealed that the reduction degree of graphene oxide was highest for deep-ultraviolet irradiated ZnO-rGO thin film. These results show that photo-chemical activation by deep-ultraviolet irradiation provides a low temperature, environment friendly technique to make ZnO-rGO thin films and can be used to fabricate semiconductor-graphene composite thin films on flexible substrates.