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Flow rate effect on the structure and morphology of molybdenum oxide nanoparticles deposited by atmospheric-pressure microplasma processing

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Bose, AC, Shimizu, Y, Mariotti, D, Sasaki, T, Terashima, K and Koshizaki, N (2006) Flow rate effect on the structure and morphology of molybdenum oxide nanoparticles deposited by atmospheric-pressure microplasma processing. NANOTECHNOLOGY, 17 (24). pp. 5976-5982. [Journal article]

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URL: http://www.iop.org/EJ/article/0957-4484/17/24/012/nano6_24_012.pdf?request-id=36cc4ae0-7b94-4ae1-8239-4b431150503f

DOI: 10.1088/0957-4484/17/24/012

Abstract

Nanoparticles of crystalline molybdenum oxide were prepared by changing the flow rate of plasma gas (2% oxygen balanced by Ar) using an atmospheric-pressure microplasma technique. The morphology and crystalline structure of the nanoparticles were characterized by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The FESEM results revealed that the shape of the deposited nanoparticles depended on the plasma gas flow rate. The TEM results supported the FESEM observations. The transmission electron diffraction (TED) pattern revealed that the obtained nanoparticles changed from MoO2 to MoO3 with the flow-rate increase, and correspondingly the nanoparticle size drastically decreased. A process mechanism is proposed from the observations of optical emission spectroscopy (OES) during the process and consumed wire surface analysis from x-ray photoelectron spectroscopy (XPS) and FESEM studies.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:262
Deposited By:Dr Davide Mariotti
Deposited On:17 Sep 2009 15:29
Last Modified:18 Aug 2011 11:51

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