期刊
SOLID STATE COMMUNICATIONS
卷 138, 期 5, 页码 242-246出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2006.03.007
关键词
nanostructures; chemical synthesis; crystal structure and symmetry; inelastic light scattering
Single-crystalline SnO2 nanowires with sizes of 4-14 nm in diameter and 100-500 nm in length were produced in a molten salt approach by using hydrothermal synthesized precursor. Structural characters of the nanowires were examined by X-ray diffraction and high-resolution electron transmission microscopy. Raman, photoluminescence and X-ray photoelectron spectra of the samples were examined under heat treatments. Three new Raman modes at 691, 514 and 358 cm(-1) were recorded and assigned. The former two are attributed to activation of original Raman-forbidden A(2u)LO mode and the third is attributed to defects in small-sized nanowires. A strong photoluminescence is observed at about 600 nm, the temperature effects is examined and the origin of the PL process is discussed via X-ray photoelectron spectra. (c) 2006 Elsevier Ltd. All rights reserved.
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