The University of Southampton
University of Southampton Institutional Repository

Aerosol assisted chemical vapour deposition of MoO3 and MoO2 thin films on glass from molybdenum polyoxometallate precursors; thermophoresis and gas phase nanoparticle formation

Aerosol assisted chemical vapour deposition of MoO3 and MoO2 thin films on glass from molybdenum polyoxometallate precursors; thermophoresis and gas phase nanoparticle formation
Aerosol assisted chemical vapour deposition of MoO3 and MoO2 thin films on glass from molybdenum polyoxometallate precursors; thermophoresis and gas phase nanoparticle formation
Aerosol assisted chemical vapour deposition (AACVD) of molybdenum polyoxometallates dissolved in acetonitrile or water yielded adhesive thin films of molybdenum oxides on glass. At substrate temperatures of 300 - 350 degrees C single phase MoO(3) was obtained, from 350 - 500 degrees C mixed phases of MoO(3) - MoO(2) were formed and at 500 - 550 degrees C single phase MoO(2) was observed. The morphology of the as-deposited molybdenum oxide films was found to be dependent upon a number of factors including the nature of the precursor used, the deposition temperature and position of the film within the reactor. Needles, spheres, agglomerates and platelets formed depending on the conditions. The films with a needle-like microstructure displayed enhanced hydrophobicity to water droplets (125 degrees contact angle). X-Ray diffraction showed that the MoO(3) films had typical cell constants of a = 3.96, b = 13.85, c = 3.69 angstrom and the MoO(2) films had typical cell constants of a = 5.62, b = 4.84, c = 5.56 angstrom, beta = 119.32 degrees. The MoO(2) films were readily converted to MoO(3) by annealing in air for 30 minutes at 600 degrees C. The MoO(3) films functioned as gas sensors showing a linear change in electrical resistance upon exposure to trace amounts of ethanol vapour in air.
3575-3582
Ashraf, Sobia
da98853d-f13c-48ab-bfcf-8b96600f68d1
Blackman, Christopher S.
fbf8b12f-b5af-42bf-a881-fd61624812f5
Hyett, Geoffrey
4f292fc9-2198-4b18-99b9-3c74e7dfed8d
Parkin, Ivan P.
7f95b9c4-1f9d-441c-8d43-ac8ea2554b85
Ashraf, Sobia
da98853d-f13c-48ab-bfcf-8b96600f68d1
Blackman, Christopher S.
fbf8b12f-b5af-42bf-a881-fd61624812f5
Hyett, Geoffrey
4f292fc9-2198-4b18-99b9-3c74e7dfed8d
Parkin, Ivan P.
7f95b9c4-1f9d-441c-8d43-ac8ea2554b85

Ashraf, Sobia, Blackman, Christopher S., Hyett, Geoffrey and Parkin, Ivan P. (2006) Aerosol assisted chemical vapour deposition of MoO3 and MoO2 thin films on glass from molybdenum polyoxometallate precursors; thermophoresis and gas phase nanoparticle formation. Journal of Materials Chemistry, 16 (35), 3575-3582. (doi:10.1039/b607335b).

Record type: Article

Abstract

Aerosol assisted chemical vapour deposition (AACVD) of molybdenum polyoxometallates dissolved in acetonitrile or water yielded adhesive thin films of molybdenum oxides on glass. At substrate temperatures of 300 - 350 degrees C single phase MoO(3) was obtained, from 350 - 500 degrees C mixed phases of MoO(3) - MoO(2) were formed and at 500 - 550 degrees C single phase MoO(2) was observed. The morphology of the as-deposited molybdenum oxide films was found to be dependent upon a number of factors including the nature of the precursor used, the deposition temperature and position of the film within the reactor. Needles, spheres, agglomerates and platelets formed depending on the conditions. The films with a needle-like microstructure displayed enhanced hydrophobicity to water droplets (125 degrees contact angle). X-Ray diffraction showed that the MoO(3) films had typical cell constants of a = 3.96, b = 13.85, c = 3.69 angstrom and the MoO(2) films had typical cell constants of a = 5.62, b = 4.84, c = 5.56 angstrom, beta = 119.32 degrees. The MoO(2) films were readily converted to MoO(3) by annealing in air for 30 minutes at 600 degrees C. The MoO(3) films functioned as gas sensors showing a linear change in electrical resistance upon exposure to trace amounts of ethanol vapour in air.

Full text not available from this repository.

More information

e-pub ahead of print date: 8 August 2006
Published date: 2006
Organisations: Organic Chemistry: Synthesis, Catalysis and Flow

Identifiers

Local EPrints ID: 346995
URI: https://eprints.soton.ac.uk/id/eprint/346995
PURE UUID: cc7635b6-7ab2-4831-b881-07ab35e661b3
ORCID for Geoffrey Hyett: ORCID iD orcid.org/0000-0001-9302-9723

Catalogue record

Date deposited: 14 Feb 2013 16:36
Last modified: 14 Jul 2018 00:30

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×