Model for Reversible Colloidal Gelation

by: E Zaccarelli, SV Buldyrev, E La Nave, AJ Moreno, Saika I Voivod, F Sciortino, P Tartaglia

Physical Review Letters, Vol. 94, No. 21. (2005), 218301.

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Abstract

We report a numerical study, covering a wide range of packing fraction and temperature T, for a system of particles interacting via a square well potential supplemented by an additional constraint on the maximum number nmax of bonded interactions. We show that, when nmax<6, the liquid-gas coexistence region shrinks, giving access to regions of low where dynamics can be followed down to low T without an intervening phase separation. We characterize these arrested states at low densities (gel states) in terms of structure and dynamical slowing down, pointing out features which are very different from the standard glassy states observed at high values.

@article{citeulike:2652791, abstract = {We report a numerical study, covering a wide range of packing fraction and temperature T, for a system of particles interacting via a square well potential supplemented by an additional constraint on the maximum number nmax of bonded interactions. We show that, when nmax<6, the liquid-gas coexistence region shrinks, giving access to regions of low where dynamics can be followed down to low T without an intervening phase separation. We characterize these arrested states at low densities (gel states) in terms of structure and dynamical slowing down, pointing out features which are very different from the standard glassy states observed at high values.}, author = {Zaccarelli, E. and Buldyrev, S. V. and La Nave, E. and Moreno, A. J. and Voivod, Saika I. and Sciortino, F. and Tartaglia, P. }, citeulike-article-id = {2652791}, doi = {http://dx.doi.org/10.1103/PhysRevLett.94.218301}, journal = {Physical Review Letters}, keywords = {colloid, gel, glass, simulation}, number = {21}, pages = {218301+}, posted-at = {2008-04-11 08:38:05}, priority = {2}, publisher = {APS}, title = {Model for Reversible Colloidal Gelation}, url = {http://dx.doi.org/10.1103/PhysRevLett.94.218301}, volume = {94}, year = {2005} }

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TY - JOUR ID - citeulike:2652791 L3 - citeulike-article-id:2652791 TI - Model for Reversible Colloidal Gelation JF - Physical Review Letters VL - 94 IS - 21 SP - 218301 PB - APS N2 - We report a numerical study, covering a wide range of packing fraction and temperature T, for a system of particles interacting via a square well potential supplemented by an additional constraint on the maximum number nmax of bonded interactions. We show that, when nmax<6, the liquid-gas coexistence region shrinks, giving access to regions of low where dynamics can be followed down to low T without an intervening phase separation. We characterize these arrested states at low densities (gel states) in terms of structure and dynamical slowing down, pointing out features which are very different from the standard glassy states observed at high values. KW - colloid KW - gel KW - glass KW - simulation AU - Zaccarelli, E AU - Buldyrev, SV AU - La Nave, E AU - Moreno, AJ AU - Voivod, Saika AU - Sciortino, F AU - Tartaglia, P PY - 2005/// UR - http://dx.doi.org/10.1103/PhysRevLett.94.218301 ER -

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