A New Approach for in situ Picolitre Sampling of Aerosol using Optically Trapped Droplets

In the event of a Chemical Warfare Agent (CWA) release, it is anticipated that CWA would be present in the atmosphere as vapour and/or aerosol. A sensing capability must provide a fast, high confidence response with low false alarms to background aerosols commonly encountered in operational environments. In addition, the technique should allow detection of a broad range of hazards, and be able to sample and analyse both gas phase species and condensed phase particles (typically >100 nm in diameter).

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