Methane detection scheme based upon the changing optical constants of a zinc oxide/platinum matrix created by a redox reaction and their effect upon surface plasmons
Methane detection scheme based upon the changing optical constants of a zinc oxide/platinum matrix created by a redox reaction and their effect upon surface plasmons
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DOI：
10.1016/j.snb.2017.08.058
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发表时间：
2018-02-01
影响因子：
8.4
通讯作者：
Webb, David J.
中科院分区：
文献类型：
--
作者：
Allsop, Thomas;Kundrat, Vojtech;Webb, David J.
我们检测了多层薄膜基质中金属氧化物半导体 (MOS) ZnO 在碳氢化合物气体甲烷存在下的光学特性变化。室温下，浓度为 0 至 10% 时的检测限为 2%（体积），浓度范围为 30% 至 80% 时的最大分辨率为 0.15%，并且相对于二氧化碳和其他烷烃气体，甲烷对甲烷具有选择性化学反应。该器件可产生 1.8 x 10(5) nm/RIU 的等效最大体折射率光谱灵敏度。这是首次通过监测 MOS 的光学特性来检测特定气体的存在。这一单次观察结果意义重大，因为 MOS 可能具有大量目标气体，从而为使用 MOS 的气体传感提供了新范例。 (C) 2017 年作者。由 Elsevier B.V. 出版
We detect changes in the optical properties of a metal oxide semiconductor (MOS), ZnO, in a multi-thin-film matrix with platinum in the presence of the hydrocarbon gas methane. A limit of detection of 2% by volume with concentrations from 0 to 10% and maximum resolution of 0.15% with concentrations ranging from 30% to 80% at room temperature are demonstrated along with a selective chemical response to methane over carbon dioxide and the other alkane gases. The device yields the equivalent maximum bulk refractive index spectral sensitivity of 1.8 x 10(5) nm/RIU. This is the first time that the optical properties of MOS have been monitored to detect the presence of a specific gas. This single observation is a significant result, as MOS have a potentially large number of target gases, thus offering a new paradigm for gas sensing using MOSs. (C) 2017 The Authors. Published by Elsevier B.V.