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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 8, Iss. 6 — Mar. 12, 2001
  • pp: 314–321

Two-dimensional angular light-scattering in aqueous NaCl single aerosol particles during deliquescence and efflorescence

Christian Braun and Ulrich K. Krieger  »View Author Affiliations

Optics Express, Vol. 8, Issue 6, pp. 314-321 (2001)

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We present a new method to analyze two–dimensional angular light–scattering patterns of single aerosol particles by image processing. A pattern distortion parameter can be calculated to determine the solid–to–liquid partitioning in micron sized composite particles similar to using temporal light–scattering intensity fluctuations. We use the scattering patterns during deliquescence of a NaCl crystal to prove the feasibility of the method. In addition we show that even fast processes like the efflorescence from a supersaturated solution droplet can be analyzed where temporal fluctuation analysis fails. We find that efflorescence cannot be described as a time reversed deliquescence. There is indication that during efflorescence a solid shell grows at the surface of the liquid droplet which finally collapses due to mechanical stress.

© Optical Society of America

OCIS Codes
(010.1110) Atmospheric and oceanic optics : Aerosols
(100.2000) Image processing : Digital image processing
(290.5820) Scattering : Scattering measurements
(290.5850) Scattering : Scattering, particles

ToC Category:
Focus Issue: Light scattering by non-spherical particles

Original Manuscript: January 17, 2001
Published: March 12, 2001

Christian Braun and Ulrich Krieger, "Two-dimensional angular light-scattering in aqueous NaCl single aerosol particles during deliquescence and efflorescence," Opt. Express 8, 314-321 (2001)

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