Cavity enhanced Raman spectroscopy is applied to the study of individual aqueous aerosol droplets. Holographic optical tweezers are employed to trap, isolate and direct the flow of aerosol. In this way, well-characterised, simple probe droplets are used to elicit thermodynamic and kinetic properties of more complex droplets through comparative measurements. Further, tweezed aerosol probes are used to measure forces, trapping strengths and observe droplet-droplet interactions.1
