Analytical Methods

Static (SLS) and Dynamic (DLS) Light Scattering

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Method:

The light scattered by a polymer solution or dispersion contains information about the static and dynamic properties of the molecules or particles. For dynamic light scattering the intensity fluctuations over time are measured at certain angles and converted into autocorrelation functions, while for static light scattering the angular dependency of the average scattering intensity is being investigated.


Determination of:

Dynamic light scattering:

- translational diffusion coefficient Dz
- hydrodynamic radius <Rh>z
- aggregation phenomena in complex solutions with several diffusing species (e.g. blood plasma)

Static light scattering:

- weight average molecular mass Mw and aggregation number
- radius of gyration <Rg2>z1/2 and resulting structure parameter ρ
- second virial coefficient A2


Equipment:

Multiangle light scattering systems equipped with He-Ne lasers (632.8 nm)


Literature:

1.
P. J. Wyatt
Measurement of Special Nanoparticle Structures by Light Scattering
DOI
2.
K. Rausch, A. Reuter, K. Fischer, M. Schmidt
Evaluation of Nanoparticle Aggregation in Human Blood Serum
DOI
3.
W. Schärtl
Light scattering from polymer solutions and nanoparticle dispersions
4.
P. J. Wyatt
Light scattering and the absolute charaterization of macromolecules
DOI
Contact: Christine Rosenauer Beate Müller
Phone: 06131-379-225 06131-379-225
 
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