Trace level detection of explosives by surface-enhanced Raman spectroscopy (SERS) for defence applications: best practice

Wenka Schweikert; Frank Schnürer; Alexander Mendl; Stefan Müller

doi:10.1117/12.2532780

7 October 2019 Trace level detection of explosives by surface-enhanced Raman spectroscopy (SERS) for defence applications: best practice

Wenka Schweikert, Frank Schnürer, Alexander Mendl, Stefan Müller

Author Affiliations +

Proceedings Volume 11166, Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies III; 111660V (2019) https://doi.org/10.1117/12.2532780
Event: SPIE Security + Defence, 2019, Strasbourg, France

Abstract

Recently a high demand for fast, cheap and easy to use selective and sensitive methods for trace detection of explosives developed. Beside other techniques like sensitive mass detections SERS (Surface-enhanced Raman spectroscopy) is a very powerful tool to enhance signals in the order of 10⁴ - 10¹⁰for Raman-active analytic molecules. SERS based on the interaction between surface plasmon of metal nanoparticles (10 – 300 nm) like gold, silver, aluminum and gold/palladium alloy with traces of contaminants like explosives. Here we present our results for different explosives on different available and self-made SERS-substrates with varying parameters, like laser excitation (266 nm, 532 nm, 633 nm, 785 nm and 1064 nm), laser power, spot size and local energetic efficiency to acquire the best practice for an easy, effective and safe treatment of explosive traces.

Citation Download Citation

Wenka Schweikert, Frank Schnürer, Alexander Mendl, and Stefan Müller "Trace level detection of explosives by surface-enhanced Raman spectroscopy (SERS) for defence applications: best practice", Proc. SPIE 11166, Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies III, 111660V (7 October 2019); https://doi.org/10.1117/12.2532780

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