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Nanotechnology. 2013 May 24;24(20):205303. doi: 10.1088/0957-4484/24/20/205303. Epub 2013 Apr 19.

Fabrication of nanocrystalline SnO₂ using electron stimulated oxidation.

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Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China.


Fabrication of nanocrystalline SnO₂ using electron stimulated oxidation was investigated by in situ transmission electron microscopy. SnO₂ nanocrystals ranging from several to dozens of nanometers were transformed from single crystalline tin under 200 keV electron irradiation. This process includes crystallization of the surface amorphous SnO₂ layer and oxidation of the inner tin crystal substrate. On stimulation by electron irradiation, newly formed SnO₂ is supposed to act as a catalyst to oxidize the tin atoms underneath with lattice oxygen, and then be re-oxidized by absorbed oxygen from the residual gas of the microscope. This provides a new method to fabricate nanocrystalline SnO₂ materials and structures.

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