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Hindered diffusion of a single sphere very near a wall in a nonuniform force field

J. Chem. Phys. 98, 7552 (1993); doi:10.1063/1.464695

Issue Date: 1 May 1993

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Nasser A. Frej and Dennis C. Prieve
Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
Total internal reflection microscopy is used to monitor Brownian fluctuations in the elevation of a single 10 µm sphere, levitated 0.05 to 0.35 µm above a glass plate by double-layer repulsion in a dilute aqueous salt solution. An analysis reveals that the initial slope of the autocorrelation function of the scattering intensity yields the diffusion coefficient evaluated at the weighted-average elevation in which the product of the Boltzmann factor and the square of the scattering intensity for that elevation are used as the weighting factor. When the sphere is very close to the wall, its mobility is expected to be significantly reduced owing to hydrodynamic interactions with the wall. Diffusion coefficients as small as 1.5% of the Stokes–Einstein value in the bulk were measured. Using Brenner's relation between mobility and elevation [Chem. Eng. Sci. 16, 242 (1961)], the average elevation was inferred from the ratio of the average diffusion coefficient to its bulk value. The result is compared to the elevation obtained from the brightness of the sphere. Good agreement is obtained between the elevations inferred from the two independent measurements. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.
History: Received 23 November 1992; accepted 29 January 1993
Permalink: http://link.aip.org/link/?JCPSA6/98/7552/1
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KEYWORDS and PACS

Keywords
PACS
  • 05.40.+j
    Statistical physics and thermodynamics Fluctuation phenomena, random processes, and Brownian motion
  • 78.35.+c
    Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Brillouin and Rayleigh scattering
  • 73.30.+y
    Electronic structure and electrical properties of surfaces, interfaces, and thin films Surface double layers, Schottky barriers, and work functions
  • YEAR: 1993

PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (22)
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  1. E. J. Verwey and J. Th. Overbeek, Theory of the Stability of Lyophobic Colloids (Elsevier, Amsterdam, 1948).
  2. D. C. Prieve, F. Luo, and F. Lanni, Faraday Discuss. Chem. Soc. 83, 22 (1987).
  3. S. G. Bike and D. C. Prieve, Int. J. Multiphase Flow 16, 727 (1990).
  4. D. C. Prieve and N. A. Frej, Langmuir 6, 396 (1990).
  5. D. C. Prieve, S. G. Bike, and N. A. Frej, Faraday Discuss. Chem. Soc. 90 (1990).
  6. H. Brenner, Chem. Eng. Sci. 16, 242 (1961).
  7. R. G. Cox and H. Brenner, Chem. Eng. Sci. 22, 1753 (1967).
  8. H. Chew, D. S. Wang, and M. Kerker, Appl. Opt. 18, 2679 (1979).
  9. B. J. Berne and R. Pecora, Dynamic Light Scattering (Wiley, New York, 1976).
  10. H. Z. Cummins and E. R. Pike, Photon Correlation and Light Beating Spectroscopy (Plenum, New York, 1974).
  11. H. Z. Cummins, F. D. Carlson, T. J. Herbert, and G. Woods, Biophys. J. 9, 518 (1969).
  12. S. Chandrasekhar, Rev. Mod. Phys. 15, 1 (1943).
  13. D. C. Prieve and W. B. Russel, J. Colloid Interface Sci 125, 1 (1988),
  14. D. C. Prieve and B. M. Alexander, Science 231, 1269 (1986);
  15. Langmuir 3, 788 (1987).
  16. N. J. Harrick, Internal Reflection Spectroscopy (Wiley, New York, 1976).
  17. J. G. H. Joosten, E. T. F. Geladé, and P. N. Pusey, Phys. Rev. A 42, 2161 (1990).
  18. P. N. Pusey and W. van Megen, Physica A 157, 705 (1989).
  19. For example, see Eqs. (l)-(3) in Ref. 16.
  20. W. H. Smyrl (personal communication).
  21. R. J. Hunter, Foundations of Colloid Science (Clarendon, Oxford, 1987), Vol. 1.
  22. I. N. Court and F. K. Willisen, Appl. Opt. 3, 719 (1964).
  23. D. C. Prieve and J. Y. Walz, Appl. Opt. (in press).

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