dorsal/arxiv
View SchemaAuto-correlation Function Analysis of Scattered Light Intensity at Different Scattering Angles
| Authors | Yong Sun |
|---|---|
| Categories | |
| ArXiv ID | physics/0512009 |
| URL | https://arxiv.org/abs/physics/0512009 |
Abstract
In this work, the effects of the scattering angle on the nonexponentiality of the normalized time auto-correlation function of the scattered light intensity $g^{(2)}(\tau) $ are investigated using dilute Poly($N$-isopropylacrylamide) microgel and standard polystyrene latex samples in dispersion respectively. The results show that the influences of the scattering angle on the deviation between an exponentiality and $% g^{(2)}(\tau) $ are small. With the assistance of the simulated data of $g^{(2)}(\tau) $, the effects of the particle size distribution and scattering angle on the deviation between an exponentiality and $g^{(2)}(\tau) $ are explored. The analysis reveals that the nonexponentiality of $% g^{(2)}(\tau) $ is determined by the particle size distribution and scattering angle. In general, the influences of the particle size distribution are small on the nonexponentiality of $g^{(2)}(\tau) $ and very large on the initial slope of the logarithm of $g^{(2)}(\tau) $ and the effects of the scattering angle are determined by the particle size distribution and mean particle size. Under some conditions, the deviation between an exponentiality and $g^{(2)}(\tau) $ is greatly influenced by the scattering angle. The values of the apparent hydrodynamic radius are also determined by the particle size distribution and scattering angle. The apparent hydrodynamic radius and its distribution obtained using the cumulants method are different from the hydrodynamic radius and its distribution.
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"abstract": "In this work, the effects of the scattering angle on the nonexponentiality of\nthe normalized time auto-correlation function of the scattered light intensity\n$g^{(2)}(\\tau) $ are investigated using dilute Poly($N$-isopropylacrylamide)\nmicrogel and standard polystyrene latex samples in dispersion respectively. The\nresults show that the influences of the scattering angle on the deviation\nbetween an exponentiality and $% g^{(2)}(\\tau) $ are small. With the assistance\nof the simulated data of $g^{(2)}(\\tau) $, the effects of the particle size\ndistribution and scattering angle on the deviation between an exponentiality\nand $g^{(2)}(\\tau) $ are explored. The analysis reveals that the\nnonexponentiality of $% g^{(2)}(\\tau) $ is determined by the particle size\ndistribution and scattering angle. In general, the influences of the particle\nsize distribution are small on the nonexponentiality of $g^{(2)}(\\tau) $ and\nvery large on the initial slope of the logarithm of $g^{(2)}(\\tau) $ and the\neffects of the scattering angle are determined by the particle size\ndistribution and mean particle size. Under some conditions, the deviation\nbetween an exponentiality and $g^{(2)}(\\tau) $ is greatly influenced by the\nscattering angle. The values of the apparent hydrodynamic radius are also\ndetermined by the particle size distribution and scattering angle. The apparent\nhydrodynamic radius and its distribution obtained using the cumulants method\nare different from the hydrodynamic radius and its distribution.",
"arxiv_id": "physics/0512009",
"authors": [
"Yong Sun"
],
"categories": [
"physics.chem-ph"
],
"title": "Auto-correlation Function Analysis of Scattered Light Intensity at Different Scattering Angles",
"url": "https://arxiv.org/abs/physics/0512009"
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