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Plasma production of metallic nanoparticles

Published online by Cambridge University Press:  31 January 2011

ChinHao Chou  and
Jonathan Phillips
ChinHao Chou
Affiliation:
Department of Chemical Engineering, 133 Fenske Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
Jonathan Phillips*
Affiliation:
Department of Chemical Engineering, 133 Fenske Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
*
a)Author to whom correspondence should be addressed.
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Abstract

Metallic iron and iron oxide particles were produced by injecting ferrocene into the afterglow region of a low pressure, low power, plasma generated using a microwave power source. This was done as part of an effort to explore the feasibility of using flow type microwave plasmas for the production of metal nanoparticles. It was found that two parameters had the largest impact on the particles: injection point and plasma composition. Analysis done using Mössbauer effect spectroscopy, transmission electron microscopy, and x-ray diffraction indicated that low yields of small particles (ca. 10 nm) resulted from injection into the afterglow region. Much higher yields of large particles (ca. 50 nm) formed if the ferrocene was injected through the coupler. In hydrogen plasmas the particles that were produced were metallic iron, whereas in oxygen and argon plasmas the particles were iron oxide. In all cases significant amounts of graphitic carbon formed around the metal particles.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 8 , August 1992 , pp. 2107 - 2113
Copyright
Copyright © Materials Research Society 1992

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