title: Photo-Response of Functionalized Self-Assembled Graphene Oxide on Zinc Oxide Heterostructure to UV Illumination.
abstract: Convective assembly technique which is a simple and scalable method was used for coating uniform graphene oxide (GO) nanosheets on zinc oxide (ZnO) thin films. Upon UV irradiation, an enhancement in the on-off ratio was observed after functionalizing ZnO films by GO nanosheets. The calculations of on-off ratio, the device responsivity, and the external quantum efficiency were investigated and implied that the GO layer provides a stable pathway for electron transport. Structural investigations of the assembled GO and the heterostructure of GO on ZnO were performed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The covered GO layer has a wide continuous area, with wrinkles and folds at the edges. In addition, the phonon lattice vibrations were investigated by Raman analysis. For GO and the heterostructure, a little change in the ratio between the D-band and G-band was found which means that no additional defects were formed within the heterostructure.
authors.affiliation: Physics Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt. alynabieh@yahoo.com.|Recruitment Department, University of Hail, Hail, 2440, Kingdom of Saudi Arabia. alynabieh@yahoo.com.
authors.forename: A N
authors.initials: AN
authors.lastname: Fouda
authors.affiliation: Basic Science Department, Faculty of Industrial Education, Helwan University, Cairo, Egypt.
authors.forename: A B
authors.initials: AB
authors.lastname: El Basaty
authors.affiliation: Department of Basic Science, Higher Technological Institute, 10th of Ramadan City, Egypt.
authors.forename: E A
authors.initials: EA
authors.lastname: Eid
keywords: Graphene oxide on ZnO; Raman analysis; Self-assembly; Structure modeling