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Electron-Beam-Induced Growth of TiO2 Nanostructures

Published online by Cambridge University Press:  01 February 2011

See Wee Chee ,
Shankar Sivaramakrishnan ,
Renu Sharma  and
Jian-Min Zuo
See Wee Chee*
Affiliation:
LeRoy Eyring Center for Solid State Science, Arizona State University, Tempe, AZ 85287, USA
Shankar Sivaramakrishnan
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 68101, USA
Renu Sharma
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899, USA School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85287, USA
Jian-Min Zuo
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 68101, USA
*
Corresponding author. E-mail: see.chee@asu.edu
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Abstract

We report the evolution of titanium dioxide nanostructures when Au nanoparticles, supported on single crystal TiO2 substrates, were heated under ∼260 Pa of flowing O2 in an environmental transmission electron microscope. Nanostructures with different morphologies were first observed around 500°C. Our measurements show that temperature, oxygen pressure, and the electron beam control the nanostructure growth. We propose a reaction-controlled growth mechanism where mobile Ti atoms generated by the electron- beam-induced reduction of TiO2 are preferentially reoxidized at the Au-TiO2 interface.

Keywords

titanium dioxidenanostructuresin situ electron microscopyelectron-beam-induced effects
Type
Material Applications
Information
Microscopy and Microanalysis , Volume 17 , Issue 2 , April 2011 , pp. 274 - 278
Copyright
Copyright © Microscopy Society of America 2011

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Footnotes

The full description of the procedures used in this article requires the identification of certain commercial products and their suppliers. The inclusion of such information should in no way be construed as indicating that such products or suppliers are endorsed by the National Institute of Standards and Technology (NIST) or are recommended by NIST or that they are necessarily the best materials, instruments, software, or suppliers for the purposes described.

See Wee Chee is currently at Rensselaer Polytechnic Institute, Troy, New York

References

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