An investigation of the Structural, Electrical and Optical Properties of Graphene-Oxide Thin Films Using Different Solvents

Abstract

Graphene oxide (GO) thin films were prepared successfully using modified Hummer's method, which includes oxidation of graphite and reduction to graphene oxide at room temperature. Then; the samples were deposited on glass substrates using the sol-gel technique. Different solutions have been used to obtain graphene oxide such as Ethanol, Acetone, and Deionized Water. The structural, optical and electrical properties of the prepared samples were diagnosed and studied using optical microscope and XRD diffraction, Fourier Transform Infrared Spectroscopy (FTIR) and UV-Vis spectrophotometer respectively. XRD pattern confirmed the formation of graphene oxide with a sharp peak at an angle of 2θ=11.42°. Thicknesses of (GO) samples using weight method have been calculated. In addition, the optical properties of the samples such as transmittance, reflectance, refractive index, extinction coefficient, and optical energy gap have been measured. The optical band gap of the samples dissolved in acetone, deionized water and ethanol has been measured of about 2.5, 2.45 and 2.35 eV respectively.