Alteration of architecture of MoO sub(3) nanostructures on arbitrary substrates: growth kinetics, spectroscopic and gas sensing properties

MoO sub(3) nanostructures have been grown in thin film form on five different substrates by RF magnetron sputtering and subsequent annealing; non-aligned nanorods, aligned nanorods, bundled nanowires, vertical nanorods and nanoslabs are formed respectively on the glass, quartz, wafer, alumina and sa...

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Bibliographic Details
Published in:Nanoscale 2014-10, Vol.6 (22), p.13882-13894
Main Authors: Illyaskutty, Navas, Sreedhar, Sreeja, Sanal Kumar, G, Kohler, Heinz, Schwotzer, Matthias, Natzeck, Carsten, Pillai, VPMahadevan
Format: Article
Language:English
Subjects:
Alterations
Gas sensors
Nanorods
Nanostructure
Spectroscopy
Thermal expansion
Thin films
X-ray photoelectron spectroscopy
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Summary:MoO sub(3) nanostructures have been grown in thin film form on five different substrates by RF magnetron sputtering and subsequent annealing; non-aligned nanorods, aligned nanorods, bundled nanowires, vertical nanorods and nanoslabs are formed respectively on the glass, quartz, wafer, alumina and sapphire substrates. The nanostructures formed on these substrates are characterized by AFM, SEM, GIXRD, XPS, micro-Raman, diffuse reflectance and photoluminescence spectroscopy. A detailed growth model for morphology alteration with respect to substrates has been discussed by considering various aspects such as surface roughness, lattice parameters and the thermal expansion coefficient, of both substrates and MoO sub(3). The present study developed a strategy for the choice of substrates to materialize different types MoO sub(3) nanostructures for future thin film applications. The gas sensing tests point towards using these MoO sub(3) nanostructures as principal detection elements in gas sensors.
ISSN:2040-3364
2040-3372
DOI:10.1039/c4nr04529g