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Improvement of windowed type environmental-cell transmission electron microscope for in situ observation of gas-solid interactions

Rev. Sci. Instrum. 80, 113701 (2009); doi:10.1063/1.3250862

Published 2 November 2009

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Tadahiro Kawasaki,1,2 Kouta Ueda,1 Mikio Ichihashi,3 and Takayoshi Tanji3
1Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
2PRESTO-JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
3EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
We have developed an improved, windowed type environmental-cell (E-cell) transmission electron microscope (TEM) for in situ observation of gas-solid interactions, such as catalytic reactions at atmospheric pressure. Our E-cell TEM includes a compact E-cell specimen holder with mechanical stability, resulting in smoother introduction of the desired gases compared with previous E-cell TEMs. In addition, the gas control unit was simplified by omitting the pressure control function of the TEM pre-evacuation chamber. This simplification was due to the successful development of remarkably tough thin carbon films as the window material. These films, with a thickness of <10  nm, were found to withstand pressure differences >2  atm. Appropriate arrangement of the specimen position inside the E-cell provided quantitatively analyzable TEM images, with no disturbances caused by the windowed films. As an application, we used this E-cell TEM to observe the dynamic shape change in a catalytic gold nanoparticle supported on TiO2 during the oxidation of CO gas. ©2009 American Institute of Physics
History: Received 30 July 2009; accepted 25 September 2009; published 2 November 2009
Permalink: http://link.aip.org/link/?RSINAK/80/113701/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.78.+s
    Electron, positron, and ion microscopes; electron diffractometers
  • 82.65.+r
    Surface and interface chemistry; heterogeneous catalysis at surfaces
  • 81.65.Mq
    Surface oxidation
  • 61.46.Df
    Structure of nanocrystals and nanoparticles
  • 68.55.aj
    Insulator thin film nucleation and growth
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
Publisher:
AIP is a member of CrossRef AIP

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