Identification and Quantification of Explosives in Nanolitre Solution Volumes by Raman Spectroscopy in Suspended Core Optical Fibers

Sensors

Georgios Tsiminis²  Fenghong Chu¹  Stephen C. Warren-Smith²  Nigel A. Spooner² 

[1] School of Computer Science and Information Technology, Shanghai University of Electric Power, Shanghai 200090, China; E-Mail:;Institute for Photonics & Advanced Sensing and School of Chemistry & Physics, the University of Adelaide, Adelaide, South Australia 5005, Australia; E-Mails:

关键词: explosives detection;    fiber sensors;    Raman spectroscopy;    chemical sensing;    microstructured optical fibers;   

DOI  :  10.3390/s131013163

来源: mdpi

【 摘 要 】

A novel approach for identifying explosive species is reported, using Raman spectroscopy in suspended core optical fibers. Numerical simulations are presented that predict the strength of the observed signal as a function of fiber geometry, with the calculated trends verified experimentally and used to optimize the sensors. This technique is used to identify hydrogen peroxide in water solutions at volumes less than 60 nL and to quantify microgram amounts of material using the solvent's Raman signature as an internal calibration standard. The same system, without further modifications, is also used to detect 1,4-dinitrobenzene, a model molecule for nitrobenzene-based explosives such as 2,4,6-trinitrotoluene (TNT).

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.