Synthesis and low-temperature photoluminescence properties of SnO2 nanowires and nanobelts
Synthesis and low-temperature photoluminescence properties of SnO2 nanowires and nanobelts
复制标题
DOI：
10.1088/0957-4484/17/6/025
复制
发表时间：
2006-03-28
期刊：
影响因子：
3.5
通讯作者：
Chu, PK
中科院分区：
文献类型：
--
作者：
Luo, SH;Fan, JY;Chu, PK
以金膜为催化剂，采用热氧化法制备了金红石型二氧化锡纳米线和纳米带。纳米线或纳米带可以通过调节反应温度来选择性地产生。提出了气-液-固生长机理。纳米线和纳米带的带隙分别为3.74和3.81 eV，从UV/可见光吸收光谱结果确定。SnO 2纳米线显示出稳定的光致发光，具有以470和560 nm为中心的两个发射峰。在10 ~ 300 K的实验范围内，它们的波长几乎保持不变，而强度则敏感地依赖于温度。SnO 2纳米带显示出类似的光致发光行为，并讨论了发光的起源。
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.