▎ 摘　　要

A facile solvo-thermal route is employed in the synthesis of Graphene/ZnO-nanocomposite. Analysis of Graphene/ZnO-nanocomposite synthesized and performed using spectroscopes and electron microscopic in various investigations like: X-ray diffraction (XRD), FTIR, FT-Raman spectroscopy, Scanning electron microscope (SEM), Transmission electron microscope (SEM), Atomic Force Microscopy (AFM), dielectric contacts and loss investigations. Crystalline structure was examined by XRD patterns, while the morphology was investigated was carried out using typical electron microscopic investigations of FE-SEM and HR-TEM equipped with Electron Dispersion Spectroscopy (EDS) analogous to the detection of chemical elements in hybrid composite. The thickness of thin film and surface topography were confirmed by AFM. The UV-visible absorption spectroscopy, while calculating optical band gap energy (E-g) of Graphene/ZnO-nanocomposite was found to be 3.15 eV. The photoluminescence spectrum was also used to determine the optical properties. Hence, the FTIR and Raman spectrum was used in identifying the functional groups. At various frequencies and at an ambient condition of temperatures, the dielectric studies like: dielectric constant, dielectric loss and AC conductivity properties were investigated. We reported the smartest applied methodologies for the designing of ZnO nanostructures homogeneous dispersion with graphene for this hybrid nanocomposite. A range of remarkable characteristics is then presented, organized into sections describing the optical switching of phase transition with temperature. In this article, we provide an overview idea of the most recent progresses in Graphene/ZnO-nanocomposite doping-induced to control the novel switching operation for the first time. This optimization puts the Graphene/ZnO hybrid structure of the high impact level applications in nanoelectronics and optoelectronics. (C) 2017 Elsevier B.V. All rights reserved.