ZnO nano/microstructures grown by laser assisted flow deposition
authors Rodrigues, J; Peres, M; Soares, MRN; Fernandes, AJS; Ferreira, N; Ferro, M; Neves, AJ; Monteiro, T; Costa, FM
nationality International
journal JOURNAL OF NANO RESEARCH
author keywords nc-ZnO; LAFD; photoluminescence; DRX; Raman; SEM; TEM
keywords RESONANT RAMAN-SCATTERING; ZINC-OXIDE NANOWIRES; VAPOR-PHASE EPITAXY; OPTICAL-PROPERTIES; CATALYTIC GROWTH; NANOSTRUCTURES; TRANSPORT; TEMPERATURE; SUBSTRATE; DEVICES
abstract Nano/microstructures of zinc oxide (ZnO) were grown by the laser assisted flow deposition (LAFD) method. This new process has proved to be very efficient, allowing high yield ZnO deposits at high-rate applicable to large-scale substrates. Laser local heating promotes fast ZnO decomposition and recombination under a self-catalytic vapour liquid-solid mechanism for the nucleation and growth. Three types of ZnO morphologies were obtained according to the temperature/oxygen availability inside the growth chamber. The morphology can also be controlled adding rare-earth elements to the initial composition. Particularly, tetrapod morphology was obtained by europium oxide addition to the precursors. The structural and microstructural characterizations confirm the good crystallinity of the wurtzite structure. The photoluminescence spectroscopy revealed high optical quality of the as-grown ZnO. Specifically, the free exciton recombination and a strong near band edge recombination due to donor bound exciton transitions can be clearly recognized, although deep level emission in the green spectral region is present.
publisher TRANS TECH PUBLICATIONS LTD
issn 1662-5250
year published 2012
volume 18-19
beginning page 129
ending page 137
digital object identifier (doi) 10.4028/www.scientific.net/JNanoR.18-19.129
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
subject category Science & Technology - Other Topics; Materials Science; Physics
unique article identifier WOS:000309295700012
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 1.238
5 year journal impact factor 0.822
category normalized journal impact factor percentile 17.187
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg