This title appears in the Scientific Report :
2001
Please use the identifier:
http://hdl.handle.net/2128/1609 in citations.
Brownian dynamics study of dynamic scaling and related freezing criteria in quasi-two-dimensional dispersions
Brownian dynamics study of dynamic scaling and related freezing criteria in quasi-two-dimensional dispersions
We present a Brownian dynamics simulation study of static and dynamic properties of quasi-two-dimensional dispersions of colloidal spheres interacting by long-range screened electrostatic and by dipolar magnetic forces, respectively. The calculated van Hove real-space dynamic correlation functions,...
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Personal Name(s): | Pesche, R. |
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Kollmann, M. / Nägele, G. | |
Contributing Institute: |
Weiche Materie; IFF-WM |
Published in: | The @journal of chemical physics, 114 (2001) S. 8701 - 8707 |
Imprint: |
Melville, NY
American Institute of Physics
2001
|
Physical Description: |
8701 - 8707 |
Document Type: |
Journal Article |
Research Program: |
Polymere, Membranen und komplexe Flüssigkeiten |
Series Title: |
Journal of Chemical Physics
114 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
We present a Brownian dynamics simulation study of static and dynamic properties of quasi-two-dimensional dispersions of colloidal spheres interacting by long-range screened electrostatic and by dipolar magnetic forces, respectively. The calculated van Hove real-space dynamic correlation functions, mean squared displacements, and hydrodynamic functions are shown to obey a dynamic scaling behavior in terms of a characteristic relaxation time related to the geometrical mean particle distance. Hydrodynamic interactions introduce a second characteristic length scale, and they lead to a more restricted scaling behavior with an enhancement of self-diffusion. As a consequence of dynamic scaling, the dynamical criterion of Lowen [Phys. Rev. E 53, R29 (1996)] for the onset of colloidal freezing is shown to be equivalent to a two-dimensional freezing criterion related to the static structure factor. (C) 2001 American Institute of Physics. |