Nanowire structured SnOx-SWNT composites: High performance sensor for NOx detection
Nanowire structured SnOx-SWNT composites: High performance sensor for NOx detection
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DOI：
10.1016/j.snb.2009.07.053
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发表时间：
2009-10-12
影响因子：
8.4
通讯作者：
Kim, Dojin
中科院分区：
文献类型：
--
作者：
Hoa, Nguyen Duc;Quy, Nguyen Van;Kim, Dojin
采用流变生长和热氧化法制备了氧化锡（SnOx）和单壁碳纳米管（SWNT）纳米复合材料，并将其应用于气敏传感器。对薄膜的形貌、气敏性能、化学性能和电学性能进行了研究。Sn的氧化温度主要决定了SnOx纳米珠的化学计量，并因此决定了纳米复合材料传感器的电和气敏特性。对氮氧化物、氢气、氧气、二甲苯、丙酮、一氧化碳和氨气的气体传感也进行了检查，以确定传感器的气体选择性。纳米复合材料传感器对NOx的高灵敏度和选择性是通过单壁碳纳米管模板的多孔结构实现的。并对纳米复合结构的气敏机理进行了讨论。(C)2009 Elsevier B.V.保留所有权利。
A nanowire structured nanocomposite of tin oxide (SnOx) and a single-walled carbon nanotube (SWNT) are fabricated using rheotaxial growth and thermal oxidation method for gas sensor application. The morphology, gas sensing properties, as well as the chemical and electrical properties are investigated. The oxidation temperature for Sn mainly determines the stoichiometry of the SnOx nano-beads, and consequently the electrical and gas sensing properties of the nanocomposite sensors. The gas sensing to nitrogen oxide, hydrogen, oxygen, xylene, acetone, carbon monoxide, and ammonia are also examined to determine the gas selectivity of the sensor. The high sensitivity and selectivity towards NOx of the nanocomposite sensor is realized via the porous structure of the SWNT template. The gas sensing mechanism of the nanocomposite structure is also discussed. (C) 2009 Elsevier B.V. All rights reserved.