- Author
-
Lettieri, T. R.
|
Preston, R. E.
|
Bell, M. I.
- Title
- Raman Spectroscopy of Single Optically Levitted Droplets.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Report
-
CRDC-SP-85007,
- Book or Conf
- Chemical Research and Development Center. Scientific Conference on Obscuration and Aerosol Research, 1984. June 25-29, 1984,
Aberdeen Proving Ground, MD,
Kohl, R. H.; Stroud, D., Editors,
255-257 p.,
1985
- Keywords
-
aerosols
- Abstract
- Spontaneous Raman scattering has been observed from single aerosol droplets optically levitated by an argon ion laser beam. All of the Raman bands of bulk liquid silicone oil and dioctyl phthlate were present in spectra taken of droplet of the same liquids. This suggests that chemical characterization of individual droplets may be possible without the undesirable effects of a supporting substrate. The droplet spectra also contained unexplained, size-dependent sharp features superimposed on the Raman peaks. The new technique may have applications in chemical characterization studies of evaporating multicomponent droplets, droplets in chemically reacting flows, and other transient processes involving single liquid droplets.