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Fast fragmentation of metal oxide nanoparticles via reduction in oxyhydrogen flame

Title
Fast fragmentation of metal oxide nanoparticles via reduction in oxyhydrogen flame
Authors
박재훈
POSTECH Authors
박재훈
Date Issued
Jan-2007
Publisher
AMER INST PHYSICS
Abstract
Fast fragmentation of 20 nm iron oxide and 60 nm tin oxide nanoparticles into a few nanometer nanoparticles in a diffusion oxyhydrogen flame is reported. The phenomenon is explained by the in situ reduction of generated 20-60 nm nanoparticles. The fragmentation occurs due to reduction induced instability in the oxygen-deficient surface. Simulated experiments with electron irradiation and characterization with x-ray absorption spectroscopy substantiated this mechanism. This finding may open a route to continuously generate a few nanometer scale nanoparticles of various oxides in a flame synthesis. (C) 2007 American Institute of Physics.
URI
http://oasis.postech.ac.kr/handle/2014.oak/9599
DOI
10.1063/1.2724747
Article Type
Article
Citation
APPLIED PHYSICS LETTERS, vol. 90, no. 16, 2007-01
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 PARK, JAE HOON
Div of Advanced Materials Science
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