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Chemical, structural, and morphological characterization of tungsten nanoparticles synthesized by a facile chemical route

Published online by Cambridge University Press:  18 February 2011

Prasanta Kumar Sahoo ,
Sarika Srinivas ,
Kalyan Kamal ,
Loganathan Durai  and
Bojja Sreedhar
Prasanta Kumar Sahoo*
Affiliation:
Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad 500 058, India
Sarika Srinivas
Affiliation:
Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad 500 058, India
Kalyan Kamal
Affiliation:
Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad 500 058, India
Loganathan Durai
Affiliation:
Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad 500 058, India
Bojja Sreedhar
Affiliation:
Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India
*
a)Address all correspondence to this author. e-mail: prasant_chem@yahoo.co.in
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Abstract

Tungsten nanoparticles (W-NPs) with average sizes ranging between 30 and 80 nm were prepared by thermolytic decomposition of tungsten hexacarbonyl in presence of a mixture of surfactants, oleic acid and oleyl amine. Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy (XPS) results reveal that the surfactants oleic acid and oleyl amine bonded to the surface of W-NP through their functional groups, which in turn render stability to the nanopowders with respect to coarsening or aggregation. XPS results also confirm that carbon is present only at the surface of the W-NPs. The as-synthesized W-NPs were amorphous, and on heat treatment at 600 °C for 1 h, the amorphous powders transform into a body-centered cubic crystalline form (α-W).

Keywords

NanostructureAmorphousChemical Synthesis
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 5 , 14 March 2011 , pp. 652 - 657
Copyright
Copyright © Materials Research Society 2011

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