| Enhanced Raman scattering from nano-SnO2 grains |
| |
| 引用本文： | 丁硕,刘金全,刘玉龙. Enhanced Raman scattering from nano-SnO2 grains[J]. 中国物理, 2004, 13(11): 1854-1856 |
| |
| 作者姓名： | 丁硕 刘金全 刘玉龙 |
| |
| 作者单位： | Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
| |
| 基金项目： | Project supported in part by Special Funds for Major State Basic Research of China (Grant No 2002CB713803). |
| |
| 摘 要： | We present the Raman spectra of nano-SnO_{2} grains with sizes from 4nm to 80nm excited by 532nm and 1.06μm lines. The enhanced Raman scattering of the nanograins is observed for both exciting lines when the grain size is less than 8nm. The less the grain size is, the more intensely the Raman scattering is enhanced. According to our results, the enhancements of the Raman intensity are a few tenfolds and different for different exciting lines when the grain size is 4nm. It can be attributed to enhanced Raman scattering by electron－hole pair excitations in the nanograins that originate from sub-microscopic (10nm) size and other defect- and surface-related features. A critical size that divides respective predominance of bulk properties and the defect-, surface-, and size-related features can be determined to be about 8nm.
|
| 关 键 词： | 二氧化锡 纳米叉 拉曼光谱 散射放大 电子对 |
| 收稿时间： | 2004-03-03 |
Enhanced Raman scattering from nano-SnO2 grains |
| |
| Ding Shuo,Liu Jin-Quan and Liu Yu-Long. Enhanced Raman scattering from nano-SnO2 grains[J]. Chinese Physics, 2004, 13(11): 1854-1856 |
| |
| Authors: | Ding Shuo Liu Jin-Quan Liu Yu-Long |
| |
| Affiliation: | Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
| |
| Abstract: | We present the Raman spectra of nano-SnO_{2} grains with sizes from 4nm to 80nm excited by 532nm and 1.06μm lines. The enhanced Raman scattering of the nanograins is observed for both exciting lines when the grain size is less than 8nm. The less the grain size is, the more intensely the Raman scattering is enhanced. According to our results, the enhancements of the Raman intensity are a few tenfolds and different for different exciting lines when the grain size is 4nm. It can be attributed to enhanced Raman scattering by electron－hole pair excitations in the nanograins that originate from sub-microscopic (10nm) size and other defect- and surface-related features. A critical size that divides respective predominance of bulk properties and the defect-, surface-, and size-related features can be determined to be about 8nm. |
| |
| Keywords: | nano-SnO_{2} grains enhanced Raman scattering electron-hole pair |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理》浏览原始摘要信息 |
|
点击此处可从《中国物理》下载免费的PDF全文 |
|
