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Comparison of ZnO Nanowires Grown on E‐beam Evaporated Ag and ZnO seed layers

Abstract

In this study, ZnO nanowires with diameters ranging from 50 nm to 500 nm have been synthesized hydrothermally on Ag and ZnO seed layers deposited by electron beam evaporation. ZnO nanowires grown on hetero and homo interfaces have been studied by comparing the growth characteristics of (a) ZnO nanowires on Ag seed layer, and (b) ZnO nanowires grown on ZnO seed layer respectively. The surface morphology of as-evaporated seed layers before the nanowire growth has been investigated. Electron Backscatter diffraction (EBSD) has been employed to examine the crystallinity of ZnO nanowires. In addition, the integrity of the Ag-ZnO heterointerface has been investigated using high-resolution transmission electron microscopy (HR-TEM). The length, diameter, density, and alignment of nanowires grown on Ag and ZnO seed layers have been studied as a function of growth time from 0.5 hours to 18 hours, and precursors concentration from 5 mM to 18 mM. Furthermore, for both Ag-ZnO nanowires heterostructure and ZnO-ZnO nanowires homostructure, the role of defects in the optical properties in the wavelength range of 517 nm to 900 nm has been studied using photoluminescence (PL) spectroscopy.

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Supplementary files

Article information


Submitted
02 Sep 2019
Accepted
18 May 2020
First published
19 May 2020

This article is Open Access

Nanoscale Adv., 2020, Accepted Manuscript
Article type
Paper

Comparison of ZnO Nanowires Grown on E‐beam Evaporated Ag and ZnO seed layers

Y. Geng, K. Jeronimo, M. A. Bin Che Mahzan, P. Lomax, E. Mastropaolo and R. Cheung, Nanoscale Adv., 2020, Accepted Manuscript , DOI: 10.1039/C9NA00553F

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