Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 350930
Title Critical endpoint and analytical diagram of attractive hard-core Yukawa spheres.
Author(s) Tuinier, R.; Fleer, G.J.
Source The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical 110 (2006)41. - ISSN 1520-6106 - p. 20540 - 20545.
Department(s) Physical Chemistry and Colloid Science
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) mean spherical approximation - colloid-polymer mixture - metastable liquids - lysozyme solutions - globular-proteins - integral-equation - fluid - model - crystallization - suspensions
Abstract We analytically calculate the gas-liquid critical endpoint (cep) for hard spheres with a Yukawa attraction. This cep is a boundary condition for the existence of a liquid. We use an analytical Helmholtz energy expression for the attractive Yukawa (hard) spheres based on the first-order mean spherical approximation to the attractive Yukawa potential by Tang and Lu (J. Chem. Phys. 1993, 99, 9828). This theory and our analytical simplification of it predict the gas-liquid and fluid-solid phase behavior, as found from computer simulations, very accurately as long as the range 1/¿ of attraction is not too short. We find that the cep is situated at ¿¿ ¿ 6 and at a contact potential around 2 kT. It follows that a liquid state is only possible when the attraction range is longer than 1/6 of the particle diameter ¿, and the attraction strength is smaller than 2 kT. The liquid region does not span more than 0.6 kT in strength, and there is also a relatively narrow window for the attraction range
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