Characterization of anisotropic nano-particles by using depolarized dynamic light scattering in the near field

D. Brogioli, D. Salerno, V. Cassina, Stefano Sacanna, A. P. Philipse, F. Croccolo, F. Mantegazza

Research output: Contribution to journalArticle

Abstract

Light scattering techniques are widely used in many fields of condensed and soft matter physics. Usually these methods are based on the study of the scattered light in the far field. Recently, a new family of near field detection schemes has been developed, mainly for the study of small angle light scattering. These techniques are based on the detection of the light intensity near to the sample, where light scattered at different directions overlaps but can be distinguished by Fourier transform analysis. Here we report for the first time data obtained with a dynamic near field scattering instrument, measuring both polarized and depolarized scattered light. Advantages of this procedure over the traditional far field detection include the immunity to stray light problems and the possibility to obtain a large number of statistical samples for many different wave vectors in a single instantaneous measurement. By using the proposed technique we have measured the translational and rotational diffusion coefficients of rod-like colloidal particles. The obtained data are in very good agreement with the data acquired with a traditional light scattering apparatus.

Original languageEnglish (US)
Pages (from-to)1222-1233
Number of pages12
JournalOptics Express
Volume17
Issue number3
DOIs
StatePublished - Feb 2 2009

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near fields
light scattering
far fields
immunity
luminous intensity
rods
diffusion coefficient
scattering

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Brogioli, D., Salerno, D., Cassina, V., Sacanna, S., Philipse, A. P., Croccolo, F., & Mantegazza, F. (2009). Characterization of anisotropic nano-particles by using depolarized dynamic light scattering in the near field. Optics Express, 17(3), 1222-1233. https://doi.org/10.1364/OE.17.001222

Characterization of anisotropic nano-particles by using depolarized dynamic light scattering in the near field. / Brogioli, D.; Salerno, D.; Cassina, V.; Sacanna, Stefano; Philipse, A. P.; Croccolo, F.; Mantegazza, F.

In: Optics Express, Vol. 17, No. 3, 02.02.2009, p. 1222-1233.

Research output: Contribution to journalArticle

Brogioli, D, Salerno, D, Cassina, V, Sacanna, S, Philipse, AP, Croccolo, F & Mantegazza, F 2009, 'Characterization of anisotropic nano-particles by using depolarized dynamic light scattering in the near field', Optics Express, vol. 17, no. 3, pp. 1222-1233. https://doi.org/10.1364/OE.17.001222
Brogioli, D. ; Salerno, D. ; Cassina, V. ; Sacanna, Stefano ; Philipse, A. P. ; Croccolo, F. ; Mantegazza, F. / Characterization of anisotropic nano-particles by using depolarized dynamic light scattering in the near field. In: Optics Express. 2009 ; Vol. 17, No. 3. pp. 1222-1233.
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