Discussing the Relationship between the Static and Dynamic Light Scattering

2004/10/11 by Yong Sun, Sun, Yong
Agricultural and Biological Sciences · Computer Science · Engineering · Physics and Astronomy · #Chemical Physics (physics.chem-ph) #Data Visualization and Analytics #FOS: Physical sciences #Leaf Properties and Growth Measurement #Traffic Prediction and Management Techniques #physics.chem-ph

paper · pdf · doi:10.48550/arxiv.physics/0410064

openalex publication_date 2004/10/11 · arxiv created 2004/12/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Both the static (SLS) and dynamic (DLS) light scattering techniques are used to obtain the size information from the scattered intensity, but the static radius R_s and the apparent hydrodynamic radius R_h,app are different. In this paper, the relationship between SLS and DLS is discussed using dilute water dispersions of two different homogenous spherical particles, polystyrene latexes and poly(N-isopropylacrylamide) microgels, with a simple assumption that the hydrodynamic radius R_h is in proportion to the static radius R_s, when Rayleigh-Gans-Debye approximation is valid. With the assistance of the simulated data, the apparent hydrodynamic radius R_h,app has been discussed. The results show that the apparent hydrodynamic radius is different with the mean hydrodynamic radius of particles and is a composite size obtained from averaging the term exp (-q²Dτ) in the static size distribution G(R_s) with the weight R_s⁶P(q,R_s) .

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