Investigation of Raman spectrum for nano-SnO2 |
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| Authors: | Caoshui Xiong Yonghong Xiong Hong Zhu Yuheng Zhang Yulong Liu |
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| Affiliation: | (1) Structure Research Laboratory, University of Science and Technology of China, 230026 Hefei, China;(2) Institute of Physics, Chinese Academy of Sciences, 100080 Beijing, China;(3) Foundational Physics Center, University of Science and Technology of China, 230026 Hefei, China |
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| Abstract: | The dependence of the microstructural change and lattice space symmetry of nano-SnO2 on the annealing temperature has been studied systematically using Raman spectroscopy and X-ray diffraction. Comparing the results of nano-SnO2 with the results of amorphous film and single crystal of SnO2, it is found that the new Raman peaks N1 and N2 are in accordance with Matossi’s force constant model completely. When the annealing temperature is near 673K, the local lattice disorders and the density of vacant lattice decrease rapidly in the nano-SnO2 grains. The lattice distortion and the new Raman peaks disappear almost at the same time. The possible mechanisms of the microstructural change and the new Raman peaks N1 and N2 are discussed. Project supported by the Foundation of State Science and Technology Commission and the Natural Science Foundation of Anhui Province. |
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| Keywords: | nano-SnO2 Raman spectrum local lattice disorder vacancy clusters lattice space symmetry lattice distortion |
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