DOI: 10.1063/1.447195. Detection of small polydispersities by photon correlation spectroscopy

Detection of small polydispersities by photon correlation spectroscopy

10.1063/1.447195

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

We consider dilute suspensions of homogeneous polydisperse spherical particles for which the Rayleigh–Gans–Debye (RGD) approximation is valid. For two model particle size distributions we calculate the dependence on scattering vector Q of the average scattered intensity I(Q) and the effective diffusion coefficient De(Q) obtained from the first cumulant measured by photon-correlation spectroscopy. If the mean particle radius R̄ is large enough (≳170 nm) that the intensity form factor P(QR̄) shows at least one minimum in the accessible range of Q, we find that De(Q) exhibits a characteristic variation with Q which is very sensitive to the sample polydispersity. Under favorable conditions it should be possible to measure polydispersities (standard deviation/mean size) as small as 0.01. These theoretical considerations are supported, at least qualitatively, by experiment. We also discuss briefly the effect of relaxing the RGD approximation and the implications of this work for the more common PCS probes of polydispersity such as Laplace transformation of the light scattering correlation function.

Bibliography

Pusey, P. N., & van Megen, W. (1984). Detection of small polydispersities by photon correlation spectroscopy. The Journal of Chemical Physics, 80(8), 3513â3520.

Authors 2

P. N. Pusey (first)
W. van Megen (additional)

References 19 Referenced 109

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10.1063/1.1678153 / J. Chem. Phys. (1972)
10.1063/1.430557 / J. Chem. Phys. (1975)
10.1002/macp.1979.021800119 / Makromol. Chem. (1979)
10.1080/713820704 / Opt. Acta (1981)
10.1098/rspa.1982.0117 / Proc. R. Soc. London Ser. A (1982)
{'key': '2024021000410084000_r8'}
10.1021/ma60047a018 / Macromolecules (1975)
10.1063/1.432528 / J. Chem. Phys. (1976)
10.1021/ma60063a003 / Macromolecules (1978)
10.1021/ma60077a042 / Macromolecules (1980)
{'key': '2024021000410084000_r13'}
{'key': '2024021000410084000_r14', 'first-page': '25', 'volume': '43', 'year': '1935', 'journal-title': 'Z. Phys. Chem.'} / Z. Phys. Chem. (1935)
10.1063/1.444428 / J. Chem. Phys. (1982)
{'key': '2024021000410084000_r16'}
10.1364/JOSA.69.000796 / J. Opt. Soc. Am. (1979)
{'key': '2024021000410084000_r18', 'first-page': '285', 'volume': '44', 'year': '1983', 'journal-title': 'J. Phys. (Paris)'} / J. Phys. (Paris) (1983)

Dates

Type	When
Created	22 years, 5 months ago (Feb. 28, 2003, 12:18 p.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 9 p.m.)
Indexed	1 year ago (Aug. 12, 2024, 7:14 a.m.)
Issued	41 years, 4 months ago (April 15, 1984)
Published	41 years, 4 months ago (April 15, 1984)
Published Print	41 years, 4 months ago (April 15, 1984)

Funders 0

None

BibTeX

@article{Pusey_1984, title={Detection of small polydispersities by photon correlation spectroscopy}, volume={80}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.447195}, DOI={10.1063/1.447195}, number={8}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Pusey, P. N. and van Megen, W.}, year={1984}, month=apr, pages={3513–3520} }

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