O2 and C2H4 molecular fluorescence enhanced by aerosol surface

Abstract
The fluorescence spectra produced from ArF laser (193 nm) excitation of O2 and C2H4 either in the gas phase or adsorbed on aerosol surfaces were observed. The aerosols were produced from the reaction of O3+C2H4 or O3+C2H4+SO2 in O2 in a high pressure flow tube. The fluorescence spectra of the adsorbed molecules were identified from their gas phase spectra. It was observed that the aerosol surface greatly enhanced the molecular fluorescence cross section.