Gas sensor using single-wall carbon nanohorns
Gas sensor using single-wall carbon nanohorns
复制标题
DOI：
10.1163/156855207781389447
复制
发表时间：
2007
影响因子：
5.2
通讯作者：
N. Sano;M. Kinugasa;F. Otsuki;J. Suehiro
中科院分区：
文献类型：
--
作者：
N. Sano;M. Kinugasa;F. Otsuki;J. Suehiro
我们制作了一个气体传感器使用单壁碳纳米角（SWNHs）的气体注入电弧在水中的方法。该气体传感器由附聚的SWNH作为玻璃基板上的Al电极之间的涂层膜组成，并且监测由气体吸附引起的该涂层膜的电阻的偏移。在室温下考察了其对NH3和O3的传感性能。结果表明，SWNHs薄膜的电阻随NH3的吸附而增大，而O3的吸附则导致电阻减小。提出了一种将气体浓度与传感特性相关联的模型，重点是基于单层吸附和吸附气体分子的二级相互作用进行电荷转移的NH3检测。
We fabricated a gas sensor using single-walled carbon nanohorns (SWNHs) produced by the gas-injected arc-in-water method. This gas sensor consisted of agglomerated SWNHs as a coating film between Al electrodes on a glass substrate and the shift of the electric resistance of this coating film caused by gas adsorption was monitored. Its sensing property was examined for the detection of NH3 and O3 at room temperature. It was confirmed that the electrical resistance of the SWNHs film increases with adsorption of NH3, whereas the adsorption of O3 induced the decrease of the resistance. A model to correlate the gas concentration and the sensing property was proposed focusing on the detection of NH3 based on mono-layer adsorption and a second-order interaction of adsorbed gas molecules for charge transfer.