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

SENSORS AND ACTUATORS B-CHEMICAL

卷:255

Article

Allsop, Thomas¹  Kundrat, Vojtech²  Kalli, Kyriacos³  Lee, Graham B.¹  Neal, Ron⁴  Bond, Peter⁴  Shi, Baogul⁵  Sullivan, John⁵  Culverhouse, Phil⁴  Webb, David J.¹ 

[1] Aston Univ, Dept Elect Engn, Aston Inst Photon Technol, Birmingham B4 7ET, W Midlands, England

[2] Aston Univ, Sch Engn & Appl Sci, Nanosci Res Grp, Birmingham B4 7ET, W Midlands, England

[3] Cyprus Univ Technol, Dept Elect Engn Comp Engn & Informat, CY-3036 Limassol, Cyprus

[4] Univ Plymouth, Sch Comp Commun & Elect, Plymouth, Devon, England

[5] Aston Univ, Midlands Surface Anal Ltd, Birmingham B4 7ET, W Midlands, England

关键词: Localized surface plasmons;    Metal oxide semiconductors;    Optical sensing;    Gas sensing;    Fibre optics;   

DOI  :  10.1016/j.snb.2017.08.058

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free