title: Synthesis and Gas Sensing Properties of Single La-Doped SnO₂ Nanobelts.
abstract: Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation. Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated. It is found that the single La-SnO2 NB sensor had a high sensitivity of 8.76 to ethanediol at a concentration of 100 ppm at 230 °C, which is the highest sensitivity of a single SnO2 NB to ethanediol among three kinds of volatile organic (VOC) liquids studied, including ethanediol, ethanol, and acetone. The La-SnO2 NBs sensor also exhibits a high sensitivity, good selectivity and long-term stability with prompt response time to ethanediol. The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.
authors.affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. wuyuemei893@163.com.
authors.forename: Yuemei
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. zhangheng214168@163.com.
authors.forename: Heng
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. ykliu@ynnu.edu.cn.
authors.forename: Yingkai
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. cww11022@126.com.
authors.forename: Weiwu
authors.initials: W
authors.lastname: Chen
authors.affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. mayului@126.com.
authors.forename: Jiang
authors.initials: J
authors.lastname: Ma
authors.affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. lishuanghui808@163.com.
authors.forename: Shuanghui
authors.initials: S
authors.lastname: Li
authors.affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. qinzhaojun031@163.com.
authors.forename: Zhaojun
authors.initials: Z
authors.lastname: Qin
keywords: La-doped SnO2 nanobelts; ethanediol; gas sensor; single nanobelt