dorsal/arxiv
View SchemaDiscussing the Relationship between the Static and Dynamic Light Scattering
| Authors | Yong Sun |
|---|---|
| Categories | |
| ArXiv ID | physics/0410064 |
| URL | https://arxiv.org/abs/physics/0410064 |
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 (-q^{2}D\tau) $ in the static size distribution $G(R_{s}) $ with the weight $R_{s}^{6}P(q,R_{s}) $.
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"abstract": "Both the static $(SLS) $ and dynamic $(DLS) $ light scattering techniques are\nused to obtain the size information from the scattered intensity, but the\nstatic radius $R_{s}$ and the apparent hydrodynamic radius $R_{h,app}$ are\ndifferent. In this paper, the relationship between SLS and DLS is discussed\nusing dilute water dispersions of two different homogenous spherical particles,\npolystyrene latexes and poly($N$-isopropylacrylamide) microgels, with a simple\nassumption that the hydrodynamic radius $R_{h}$ is in proportion to the static\nradius $R_{s}$, when Rayleigh-Gans-Debye approximation is valid. With the\nassistance of the simulated data, the apparent hydrodynamic radius $R_{h,app}$\nhas been discussed. The results show that the apparent hydrodynamic radius is\ndifferent with the mean hydrodynamic radius of particles and is a composite\nsize obtained from averaging the term $\\exp (-q^{2}D\\tau) $ in the static size\ndistribution $G(R_{s}) $ with the weight $R_{s}^{6}P(q,R_{s}) $.",
"arxiv_id": "physics/0410064",
"authors": [
"Yong Sun"
],
"categories": [
"physics.chem-ph"
],
"title": "Discussing the Relationship between the Static and Dynamic Light Scattering",
"url": "https://arxiv.org/abs/physics/0410064"
},
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