二氧化锡纳米线和纳米带的合成及低温光致发光特性

Synthesis and low-temperature photoluminescence properties of SnO2 nanowires and nanobelts.

作者信息

Luo Suhua, Fan Jiyang, Liu Weili, Zhang Miao, Song Zhitang, Lin Chenglu, Wu Xinglong, Chu Paul K

机构信息

Research Center of Semiconductor Functional Film Engineering Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China. Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China.

出版信息

Nanotechnology. 2006 Mar 28;17(6):1695-9. doi: 10.1088/0957-4484/17/6/025. Epub 2006 Feb 27.

DOI:10.1088/0957-4484/17/6/025

PMID:26558579

Abstract

Ultra-long rutile tin dioxide nanowires and nanobelts are synthesized by thermal oxidation of tin powder using gold film as the catalyst. Nanowire or nanobelts can be selectively produced by tuning the reaction temperature. The vapour-liquid-solid growth mechanism is proposed. The band gaps of the nanowires and nanobelts are 3.74 and 3.81 eV respectively, determined from UV/visible absorption spectral results. The SnO2 nanowires show stable photoluminescence with two emission peaks centred at around 470 and 560 nm. Their wavelengths stay almost fixed while their intensities depend sensitively on the temperatures within the examination ranges from 10 to 300 K. The SnO2 nanobelts show similar photoluminescence behaviours and the origin of the luminescence is discussed.

摘要

以金膜为催化剂，通过锡粉的热氧化合成了超长的金红石型二氧化锡纳米线和纳米带。通过调节反应温度可以选择性地制备纳米线或纳米带。提出了气-液-固生长机制。根据紫外/可见吸收光谱结果确定，纳米线和纳米带的带隙分别为3.74和3.81电子伏特。SnO₂纳米线表现出稳定的光致发光，有两个发射峰，中心波长分别约为470和560纳米。在10至300 K的测试温度范围内，它们的波长几乎保持不变，而强度则对温度敏感依赖。SnO₂纳米带表现出类似的光致发光行为，并对发光的起源进行了讨论。