Explosives detection by fluorescence quenching of conjugated polymers in suspended core optical fibers

SENSORS AND ACTUATORS B-CHEMICAL

卷:199

Article

Chu, Fenghong¹  Tsiminis, Georgios²  Spooner, Nigel A.^2,3  Monro, Tanya M.² 

[1] Shanghai Univ Elect Power, Shanghai 200090, Peoples R China

[2] Univ Adelaide, Sch Chem & Phys, Adelaide, SA 5005, Australia

[3] Def Sci & Technol Org, Edinburgh, SA 5111, Australia

关键词: Explosives detection;    Fluorescence sensor;    Optical fiber sensor;   

DOI  :  10.1016/j.snb.2014.03.031

来源: Elsevier

【 摘 要 】

In this work we demonstrate a suspended core microstructured optical fiber-based sensor platform for explosives detection based on the fluorescence quenching of a surface-attached conjugated polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV). These fibers allow for strong evanescent field interactions with the surrounding media because of their small core size, and can sample minute liquid volumes. This is the first demonstration of a fluorescent conjugated polymer sensor capable of measuring liquid explosives samples loaded within an optical fiber. This technique is used to identify 1,4-dinitrobenzene (DNB), a member of the nitroaromatics family of explosives, in acetone for concentrations as low as 6.3 ppm in a total sampling volume of 27 nl and to quantify its concentration using the fluorescence decay lifetime, requiring an analysis time of only a few minutes. (C) 2014 The Authors. Published by Elsevier B.V.

【 授权许可】

Free