Advertisement

Approaching the limits of multiple scattering decorrelation: 3D light-scattering apparatus utilising semiconductor lasers

  • E. Overbeck
  • C. Sinn
  • T. Palberg
Conference paper
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 104)

Abstract

Light scattering as a function of scattering angle can be regarded as a standard method to investigate the dynamics of dilute colloidal suspensions. Concentrated suspensions, which are of interest if interactions between the particles are to be investigated, usually show strong multiple scattering. Decorrelation of multiple scattered light, which isolates single scattering events at the expense of a reduced signal-to-noise ratio, has been proven to work using the two-colour crosscorrelation scheme.

In this contribution we demonstrate for the first time the suppression of multiple scattering of a concentrated colloidal suspension at different scattering angles using the 3D cross-correlation technique. Our set-up is designed to extend both measurements towards smaller q values and the scattering intensity of the samples under study beyond the limits of existing apparatus. The latter feature will enable us to approach the photon-diffusion regime as far as possible using decorrelation methods.

Key words

Dynamic light scattering multiple scattering cross-correlation colloidal physics 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Sorensen CM, Mockler RC, O'Sullivan WJ (1976) Phys Rev A 14:1520–1532CrossRefGoogle Scholar
  2. 2.
    Sorensen CM, Mockler RC, O'Sullivan WJ (1978) Phys Rev A 17:2030–2035CrossRefGoogle Scholar
  3. 3.
    Bøe A, Lohne O (1978) Phys Rev A 17:2023–2029CrossRefGoogle Scholar
  4. 4.
    Böheim J, Hess W, Klein R (1979) Z Physik B 32:237–243CrossRefGoogle Scholar
  5. 5.
    Dhont JKG, de Kruif CG (1983) J Chem Phys 79:1658–1663CrossRefGoogle Scholar
  6. 6.
    Phillies GDJ (1981) J Chem Phys 74:260–262CrossRefGoogle Scholar
  7. 7.
    Schätzel K (1991) J Mod Opt 38:1845–1865Google Scholar
  8. 8.
    Phillies GDJ (1981) Phys Rev A 24:1939–1943CrossRefGoogle Scholar
  9. 9.
    Mos HJ, Pathamanoharan C, Dhont JKG. de Kruif CG (1986) J Chem Phys 84:45–49CrossRefGoogle Scholar
  10. 10.
    Drewel M, Ahrens J, Podschus U (1989) J Opt Soc Amer 7:206–210Google Scholar
  11. 11.
    Segrè PN, van Megen W, Pusey PN, Schätzel K, Peters W (1995) J Mod Opt 42:1929–1952CrossRefGoogle Scholar
  12. 12.
    Overbeck E, Sinn Chr, Palberg T, Schätzel K (1997) Colloid Surf A, accepted for publicationGoogle Scholar
  13. 13.
    Ricka J (1993) Appl Opt 32:2860–2875CrossRefGoogle Scholar

Copyright information

© Steinkopff Verlag 1997

Authors and Affiliations

  • E. Overbeck
    • 1
  • C. Sinn
    • 1
  • T. Palberg
    • 1
  1. 1.Institut für Physik der Johannes-Gutenberg-UniversitätMainzGermany

Personalised recommendations