Sharma, R.
(2011),
Electron Beam Induced Growth of TiO2 Nanostructures, Microscopy and Microanalysis, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905919
(Accessed December 26, 2024)
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Electron Beam Induced Growth of TiO2 Nanostructures
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Abstract
We report the evolution of TiO2 nanostructures when Au nanoparticles, supported on single crystal TiO2 substrates, were heated in ~2 Torr of flowing O2 in an environmental transmission electron microscope. Nanostructures with different morphologies were first observed around 500°C. Our measurements show that nanostructure growth is controlled by temperature, oxygen pressure, and the electron beam. We propose a reaction-controlled growth mechanism where mobile Ti atoms generated by the electron beam induced reduction of TiO2, are preferentially re-oxidized at the Au-TiO2 interface.Citation
Microscopy and Microanalysis
Volume
17
Pub Type
Journals
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Created February 1, 2011, Updated February 19, 2017