https://doi.org/10.1140/epje/i2010-10550-2
Regular Article
Confocal zero-angle dynamic depolarized light scattering
1
Dipartimento di Fisica, Università di Milano, 20133, Milano, Italy
2
Dipartimento di Elettronica, Università di Pavia, 27100, Pavia, Italy
* e-mail: marco.potenza@unimi.it
Received:
8
October
2009
Revised:
26
November
2009
Accepted:
27
November
2009
Published online:
20
January
2010
We present a novel Dynamic Depolarized Scattering method based on a tight confocal, zero scattering angle, heterodyne scheme. The method is highly immune from parasitic multiple-scattering contributions, so that it can operate with non-index-matched samples presenting large turbidity. It provides measurements of both rotational and translational diffusion coefficients, the latter via number fluctuation spectroscopy. In addition, the amplitude ratio between the two baselines for the fast rotational mode and the slow translational mode can be used to determine the particles intrinsic birefringence.
© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2010