We discuss features of simple inter-particle potentials which are able to generate low-packing fraction arrested states, i.e. gels, in the absence of a macroscopic phase separation phenomenon. We suggest that the ratio between surface and bulk free energy is crucial in favoring ideal gel states. Two possible models for gels, one based on the competition of short range attraction and long range repulsions and the other on local constraints disfavoring packed local structures are discussed. © 2005 Elsevier B.V. All rights reserved.
Routes to colloidal gel formation / Sciortino, Francesco; Sergey V., Buldyrev; DE MICHELE, Cristiano; Giuseppe, Foffi; Neda, Ghofraniha; Emilia La, Nave; Angel, Moreno; Stefano, Mossa; Ivan Saika, Voivod; Tartaglia, Piero; Emanuela, Zaccarelli. - In: COMPUTER PHYSICS COMMUNICATIONS. - ISSN 0010-4655. - STAMPA. - 169:1-3(2005), pp. 166-171. (Intervento presentato al convegno Proceedings of the Europhysics Conference on Computational Physics 2004 CCP 2004 nel 1 September 2004 through 4 September 2004) [10.1016/j.cpc.2005.03.038].
Routes to colloidal gel formation
SCIORTINO, Francesco;DE MICHELE, CRISTIANO;TARTAGLIA, Piero;
2005
Abstract
We discuss features of simple inter-particle potentials which are able to generate low-packing fraction arrested states, i.e. gels, in the absence of a macroscopic phase separation phenomenon. We suggest that the ratio between surface and bulk free energy is crucial in favoring ideal gel states. Two possible models for gels, one based on the competition of short range attraction and long range repulsions and the other on local constraints disfavoring packed local structures are discussed. © 2005 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
