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Electron-Beam-Induced Growth of TiO2 Nanostructures

  • See Wee Chee (a1), Shankar Sivaramakrishnan (a2), Renu Sharma (a3) (a4) and Jian-Min Zuo (a2)
Abstract
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.

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Corresponding author
Corresponding author. E-mail: see.chee@asu.edu
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Microscopy and Microanalysis
  • ISSN: 1431-9276
  • EISSN: 1435-8115
  • URL: /core/journals/microscopy-and-microanalysis
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Supplementary Materials

Chee Supplementary Video
Chee Supplementary Video 03

 Video (69.8 MB)
69.8 MB
VIDEO
Supplementary Materials

Chee Supplementary Video
Chee Supplementary Video 02

 Video (30.4 MB)
30.4 MB
VIDEO
Supplementary Materials

Chee Supplementary Video
Chee Supplementary Video 01

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77.3 MB

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