Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/18851
 Title: Kinetic growth of field-oriented chains in dipolar colloidal solutions Author: Miguel López, María del CarmenPastor-Satorras, R. (Romualdo), 1967- Keywords: Mecànica estadísticaMètode de MontecarloCol·loidesStatistical mechanicsMonte Carlo methodColloids Issue Date: 1999 Publisher: The American Physical Society Abstract: Experimental studies on the irreversible growth of field-induced chains of dipolar particles suggest an asymptotic power-law behavior of several relevant quantities. We introduce a Monte Carlo model of chain growth that explicitly incorporates the anisotropic diffusion characteristic of a rod-like object. Assuming a simple power-law form for the mean cluster size, $S(t) \sim t^z$, the results of our model are in good agreement with the experimental measurements of the dynamic exponent $z$. Nevertheless, an alternative scenario, including logarithmic corrections to the standard power-law behavior, provides a better and more insightful interpretation of the anomalous dynamic exponent. In contrast to some experimental findings, we do not observe any dependence of the exponents on the volume fraction of particles $\phi$. Finite-size effects are also explored by simulating very long time evolutions or highly concentrated systems. Two different behaviors are found, namely, saturation and a crossover to a quasi one-dimensional regime. Note: Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.59.826 It is part of: Physical Review E, 1999, vol. 59, núm. 1, p. 826-834 Related resource: http://dx.doi.org/10.1103/PhysRevE.59.826 URI: http://hdl.handle.net/2445/18851 ISSN: 1063-651X Appears in Collections: Articles publicats en revistes (Física de la Matèria Condensada)

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