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Applied Physics Letters / Volume 90 / Issue 16 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 90, 163106 (2007); doi:10.1063/1.2724747 (3 pages)

Fast fragmentation of metal oxide nanoparticles via reduction in oxyhydrogen flame

Peter V. Pikhitsa1, Mansoo Choi1, Sangsun Yang2, Jae-Young Kim3, Hoyoung Jang3, and Jae-Hoon Park3

1National CRI Center for Nano Particle Control, Institute of Advanced Machinery and Design, Seoul National University, Seoul 151-742, Korea and School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea
2Powder Materials Research Center, Korea Institute of Machinery and Materials, Changwon 641-831, Korea
3Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784, Korea and Department of Physics and Electron Spin Science Center, Pohang University of Science and Technology, Pohang 790-784, Korea

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(Received 19 January 2007; accepted 16 March 2007; published online 17 April 2007)

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.

© 2007 American Institute of Physics

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KEYWORDS and PACS

Keywords

nanoparticles, tin compounds, semiconductor materials, flames, electron beam effects, X-ray absorption spectra, reduction (chemical), nanotechnology, semiconductor growth

PACS

  • 81.16.Be

    Chemical synthesis methods

  • 81.05.Cy

    Elemental semiconductors

  • 61.82.Rx

    Nanocrystalline materials

  • 61.80.Fe

    Electron and positron radiation effects

  • 61.46.Df

    Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)

  • 78.70.Dm

    X-ray absorption spectra

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.2724747

PUBLICATION DATA

ISSN:

0003-6951 (print)  
1077-3118 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    S. Yang, J. Yi, S. Son, J. Jang, I. S. Altman, P. V. Pikhitsa, and M. Choi, Appl. Phys. Lett. 83, 4842 (2003)APPLAB000083000023004842000001.

    Z. Y. Wu, S. Gota, F. Jollet, M. Pollak, M. Gautier-Soyer, and C. R. Natoli, Phys. Rev. B 55, 2570 (1997).


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