Low temperature optical properties of amorphous oxide nanoclusters in polymethyl methacrylate matrix
文献类型：期刊论文
| 作者 | Volkov, VV ; Wang, ZL ; Zou, BS ; Xie, SS |
| 刊名 | CHINESE PHYSICS
 |
| 出版日期 | 2000 |
| 卷号 | 9期号:10页码:767 |
| 关键词 | SMALL SEMICONDUCTOR CRYSTALLITES ELECTRONIC STATES ZNO PHOTOCHEMISTRY |
| ISSN号 | 1009-1963 |
| 通讯作者 | Zou, BS: Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA. |
| 中文摘要 | We studied the temperature-dependent steady-state and time-resolved fluorescence properties of very small (1-2 nm) ZnO, CdO, and PbO amorphous nanoclusters prepared in AOT reverse micelles and imbedded in polymethyl methacrylate(PMMA) films. X-ray diffraction and electron diffraction and imaging indicate that these structures are amorphous. These amorphous oxide nanoclusters demonstrate similar structural, electronic, and optical properties. Properties of steady-state fluorescence spectra indicate the unique localization of electronic states due to the amorphous structure. ZnO and CdO show double-band fluorescence structure, which is due to the spin-orbital splitting, similar to Cu2O. Time-resolved fluorescence studies of the nanoclusters in the polymer reveal two lifetime components, as found in solution. The slow component reflects relaxation processes from band-tail states while the fast component may be related to high-lying extended states. The temperature dependence of fast fluorescence component reveals the presence of exciton hopping between anharmonic wells at temperatures higher than 200K. We correlate the barrier height between two wells formed around local atoms with the inter-atomic distance and bond ionicity. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41007]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Volkov, VV,Wang, ZL,Zou, BS,et al. Low temperature optical properties of amorphous oxide nanoclusters in polymethyl methacrylate matrix[J]. CHINESE PHYSICS,2000,9(10):767. |
| APA | Volkov, VV,Wang, ZL,Zou, BS,&Xie, SS.(2000).Low temperature optical properties of amorphous oxide nanoclusters in polymethyl methacrylate matrix.CHINESE PHYSICS,9(10),767. |
| MLA | Volkov, VV,et al."Low temperature optical properties of amorphous oxide nanoclusters in polymethyl methacrylate matrix".CHINESE PHYSICS 9.10(2000):767. |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。