Vapour-liquid-solid growth of ZnO-ZnMgO core-shell nanowires by gold-catalysed molecular beam epitaxy

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Title: Vapour-liquid-solid growth of ZnO-ZnMgO core-shell nanowires by gold-catalysed molecular beam epitaxy
Authors: Kennedy, OW
White, R
Shaffer, MSP
Warburton, PA
Item Type: Journal Article
Abstract: Nanowire heterostructures, combining multiple phases within a single nanowire, modify functional properties and offer a platform for novel device development. Here, ZnO/ZnMgO core–shell nanowires are grown by molecular beam epitaxy. At growth temperatures above 750 °C, Mg diffuses into ZnO making heterostructure growth impossible; at lower shell-growth temperatures (500 °C), the core–shell structure is retained. Even very thin ZnMgO shells show increased intensity photoluminescence (PL) across the ZnO band-gap and a suppression in defect-related PL intensity, relative to plain ZnO nanowires. EDX measurements on shell thickness show a correlation between shell thickness and core diameter which is explained by a simple growth model.
Issue Date: 10-May-2019
Date of Acceptance: 23-Jan-2019
URI: http://hdl.handle.net/10044/1/69159
DOI: https://dx.doi.org/10.1088/1361-6528/ab011c
ISSN: 0957-4484
Publisher: IOP Publishing
Journal / Book Title: Nanotechnology
Volume: 30
Issue: 19
Copyright Statement: © 2019 IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (https://creativecommons.org/licenses/by/3.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/K035274/1
Keywords: Science & Technology
Technology
Physical Sciences
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Science & Technology - Other Topics
Materials Science
Physics
nanowires
ZnO
heterostructure
MBE
NANOBELTS
MD Multidisciplinary
Publication Status: Published
Article Number: 194001
Online Publication Date: 2019-02-22
Appears in Collections:Chemistry



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