Effects of substrate temperature on the growth of CuO nano/micro rods by ion beam sputter deposition

Abstract

CuO nano/micro rods were deposited on Si substrates by ion beam sputter deposition at substrate temperatures 300 C, 350 C, 400 C and 450 C. The effects of changing substrate temperature on the structural properties and surface morphology of the deposited CuO nano/micro roads were studied. Field Emission Scanning Electron Microscopy micrographs showed that at substrate temperature of 300 C and 350 C, tiny nanoparticles were observed on the surface of CuO thin films and at substrate temperature of 400 C and 450 C, CuO nano/micro rods of lengths (100 nm to 1 µm) observed in a periodic arrangement. X-Ray Diffraction (XRD) analysis showed that all the diffraction peaks of the samples were single-crystalline CuO corresponded to (1 ̅11) orientation. From the crystallographic analysis using XRD data, crystallite sizes of the samples increased (18 to 32 nm) with the increase of substrate temperature. The Micro-Raman spectroscopy investigation shows that all the Raman peaks observed were phonon modes of CuO and as the substrate temperature increased, the intensities of the Rama peaks increased. Hence, by changing substrate temperatures, it is possible to deposit high quality CuO nano/micro thin films with tunable structures, morphologies and sizes for different optoelectronic applications through ion beam sputter deposition.

A comprehensive study on ZrO2-ZnO nanocomposites synthesized by the plant-mediated green method

“…The crystallite size (D S ) of the ZnO and ZrO 2 phases present in the composite was determined using the Scherrer equation [50,51]. Also, the modified Scherrer equation was used to calculate the crystallite size (D M ) for the h:ZnO phase only, and for the t:ZrO 2 phase we could not find the crystallite size using the modified Scherrer method because this method is only applicable when a suitable number of peaks are available to fit a linear plot of lnβ versus ln(1/cosθ).…”