AAAR 31st Annual Conference
October 8-12, 2012
Hyatt Regency Minneapolis
Minneapolis, Minnesota, USA
Abstract View
Differential Light Scattering by Dye Coated Silica Microspheres
Matthew Hart, PAUL LANE, Jay Eversole, Naval Research Laboratory
Abstract Number: 771 Working Group: Aerosol Physics
Abstract We report the use of elastic scattering spectroscopy for single, threat agent aerosol particle detection and discrimination. Dispersion of the refractive index results in light scattering that is dependent upon the wavelength of incident light, as well as the particle size and shape. A test bed was developed that consists of a quadrapole trap into which monodisperse silica microspheres are injected via electrospray ionization. The microspheres traverse coincident laser beams at two separate wavelengths, generating a differential scattering signal. The results of Mie scattering theory to experimental results are compared. Preliminary measurements showing the effect of an organic dye coating on differential scattering will also be presented.