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Platinum nanoparticle-functionalized tin dioxide nanowires via radiolysis and their sensing capability

Published online by Cambridge University Press:  24 May 2012

Sun-Woo Choi  and
Sang Sub Kim
Sun-Woo Choi
Affiliation:
School of Materials Science and Engineering, Inha University, Incheon 402-751, Republic of Korea
Sang Sub Kim*
Affiliation:
School of Materials Science and Engineering, Inha University, Incheon 402-751, Republic of Korea
*
a)Address all correspondence to this author. e-mail: sangsub@inha.ac.kr
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Abstract

Platinum (Pt) nanoparticles were synthesized on tin dioxide (SnO2) nanowires by applying γ-ray radiolysis. The growth behavior of Pt nanoparticles was systematically investigated as a function of precursor concentration, illumination intensity and exposure time of the γ-rays. We found that these processing parameters greatly influenced the growth behavior of Pt nanoparticles in terms of size and formation density. Vapor-phase-grown SnO2 nanowires were uniformly covered with Pt nanoparticles by the radiolysis process. The Pt nanoparticle-functionalized SnO2 nanowires were tested as sensors for detecting reductive gases including carbon monoxide, toluene, and benzene. The results indicate that the γ-ray radiolysis is an efficient way of functionalizing the surface of oxide nanowires with catalytic Pt nanoparticles.

Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 13 , 14 July 2012 , pp. 1688 - 1694
Copyright
Copyright © Materials Research Society 2012

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