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High-pressure behavior of SnO2 nanocrystals

He, Y. and Liu, J. F. and Chen, W. and Wang, H. and Zeng, Y. W. and Zhang, G. Q. and Wang, L. N. and Liu, J. and Hu, T. D. and Hahn, Horst and Gleiter, H. and Jiang, J. Z. (2005):
High-pressure behavior of SnO2 nanocrystals.
In: Physical Review B, American Physical Society, p. 212102, 72, (21), ISSN 1098-0121,
[Online-Edition: http://dx.doi.org/10.1103/PhysRevB.72.212102],
[Article]

Abstract

High-pressure behaviors of bulk and nanocrystalline SnO2 samples have been studied by in situ highpressure synchrotron radiation x-ray diffraction measurements up to about 40 GPa at ambient temperature. It is found that the smaller the nanocrystal SnO2, the higher the onset transition pressure for the rutile-to-cubic phase transformation in SnO2. The enhancement of the transition pressure is mainly due to the surface energy differences between the rutile and cubic phases and/or the enhancement of energy band gap when the SnO2 crystallite size gets smaller.

Item Type: Article
Erschienen: 2005
Creators: He, Y. and Liu, J. F. and Chen, W. and Wang, H. and Zeng, Y. W. and Zhang, G. Q. and Wang, L. N. and Liu, J. and Hu, T. D. and Hahn, Horst and Gleiter, H. and Jiang, J. Z.
Title: High-pressure behavior of SnO2 nanocrystals
Language: English
Abstract:

High-pressure behaviors of bulk and nanocrystalline SnO2 samples have been studied by in situ highpressure synchrotron radiation x-ray diffraction measurements up to about 40 GPa at ambient temperature. It is found that the smaller the nanocrystal SnO2, the higher the onset transition pressure for the rutile-to-cubic phase transformation in SnO2. The enhancement of the transition pressure is mainly due to the surface energy differences between the rutile and cubic phases and/or the enhancement of energy band gap when the SnO2 crystallite size gets smaller.

Journal or Publication Title: Physical Review B
Volume: 72
Number: 21
Publisher: American Physical Society
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials
Date Deposited: 11 Feb 2013 08:47
Official URL: http://dx.doi.org/10.1103/PhysRevB.72.212102
Identification Number: doi:10.1103/PhysRevB.72.212102
Funders: The authors would like to thank BSRF in Beijing, NSRL in Hefei, HASYLAB in Hamburg SPring8, and KEK in Japan for use of the synchrotron radiation facilities., Financial support from the National Natural Science Foundation of China �Grant Nos. 50341032 and 50425102�, the Ministry of Science and Technology of China �Grant Nos. 2004/249/ 37-14 and 2004/250/31-01A�, the Ministry of Education of China,, and Zhejiang University is gratefully acknowledged.
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