物理化学学报 >> 2010, Vol. 26 >> Issue (08): 2306-2310.doi: 10.3866/PKU.WHXB20100820

材料物理化学 上一篇    下一篇

Mn掺杂SnO2一维纳米结构的制备、形貌及光学性质

池俊红, 王娟   

  1. 兰州大学磁学与磁性材料教育部重点实验室, 兰州 730000
  • 收稿日期:2010-01-31 修回日期:2010-03-30 发布日期:2010-07-23
  • 通讯作者: 池俊红 E-mail:chijh@lzu.edu.cn
  • 基金资助:

     国家自然科学基金青年科学基金(50901037)和国家基础科学人才培养基金(J0630313)资助项目

Synthesis, Morphology and Optical Properties of Mn Doped SnO2 One-Dimensional Nanostructures

CHI Jun-Hong, WANG Juan   

  1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, P. R. China
  • Received:2010-01-31 Revised:2010-03-30 Published:2010-07-23
  • Contact: CHI Jun-Hong E-mail:chijh@lzu.edu.cn
  • Supported by:

    The project was supported by the Young Scientists Fund of the National Natural Science Foundation of China (50901037) and National Fund for Fostering Talents of Basic Science of China (J0630313).

摘要:

用化学气相沉积(CVD)法制备了Mn掺杂的SnO2一维纳米结构(纳米线及纳米带), X射线衍射(XRD)显示样品为金红石型SnO2晶体, 其生长机理可分别归结为气-液-固(VLS)和气-固(VS)机理, 生长温度和气态原料浓度的差别是造成样品形貌及生长机理不同的主要原因. 样品的拉曼谱出现了500、543、694 和720 cm-1四个新拉曼谱峰, 分别是由活性的红外模和表面模引起的. 纳米线及纳米带发光峰位于520 nm处, 发光强度随样品中氧空位的增减出现由强到弱的变化.

关键词: 纳米结构, 锰掺杂氧化锡, 化学气相沉积, 光学性质, 生长机理

Abstract:

Mn doped SnO2 one-dimensional nanostructures (nanowires and nanobelts) were fabricated using catalyst assisted chemical vapor deposition (CVD). X-ray diffraction revealed a rutile structure of SnO2 in all the products. The morphology and the growth mechanism of the products were sensitive to the fabrication temperature and the concentration of the gaseous source materials. The growth mechanisms of the nanowires and nanobelts can be ascribed to vapor-liquid-solid (VLS) and vapor-solid (VS) processes, respectively. Four new peaks appeared at 500, 543, 694, and 720 cm-1 in the Raman spectra were attributed to the active infrared mode and the surface mode. A photolumines-cence peak was observed at 520 nm and the intensity of the peak was closely dependent on the concentration of oxygen vacancies.

Key words: Nanostructure, Mn doped SnO2, Chemical vapor deposition, Optical property, Growth mechanism

MSC2000: 

  • O644