Explosive vapour/particles detection using SERS substrates and a hand-held Raman detector.

ABSTRACT: We developed and optimized surface-enhanced Raman spectrometry (SERS) methods for trace analysis of explosive vapour and particles using a hand-held Raman spectrometer in the field. At first, limits of detection (LODs) using SERS methods based on a colloidal suspension of gold nanoparticles were measured under alkaline conditions and are as follows: pentaerythritol tetranitrate (PETN) (1.5 × 10^-6 M, 6.9 ng), 1,3,5,7-tetranitro-1,3,5,7-tetrazoctane (HMX), 8.1 × 10^-6 M, 35 ng; urea nitrate (UN), 9.2 × 10^-4 M, 165 ng; 2,4,6-trinitrotoluene (TNT), 1.1 × 10^-7 M, 0.35 ng. We developed SERS substrates that demonstrate the wide applicability of this technique for use in the field for explosive vapour and particles adsorbed on a surface based on Au nanopa

SUBMITTER: Heleg-Shabtai V 

PROVIDER: S-EPMC9037225 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature