title: Synthesis and low-temperature photoluminescence properties of SnO2 nanowires and nanobelts.
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.
authors.affiliation: 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.
authors.forename: Suhua
authors.initials: S
authors.lastname: Luo
authors.forename: Jiyang
authors.initials: J
authors.lastname: Fan
authors.forename: Weili
authors.initials: W
authors.lastname: Liu
authors.forename: Miao
authors.initials: M
authors.lastname: Zhang
authors.forename: Zhitang
authors.initials: Z
authors.lastname: Song
authors.forename: Chenglu
authors.initials: C
authors.lastname: Lin
authors.forename: Xinglong
authors.initials: X
authors.lastname: Wu
authors.forename: Paul K
authors.initials: PK
authors.lastname: Chu