Sat, 26 Jul 2008 06:13:25 BST CiteULike: dchen's Gasser http://www.citeulike.org/user/dchen/author/Gasser CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2711055 <i>Physical Review Letters, Vol. 93, No. 10. (2004), 108302.</i> Limits to Gelation in Colloidal Aggregation S Manley L Cipelletti V Trappe AE Bailey RJ Christianson U Gasser V Prasad PN Segre MP Doherty S Sankaran AL Jankovsky B Shiley J Bowen J Eggers C Kurta T Lorik DA Weitz doi:10.1103/PhysRevLett.93.108302 Physical Review Letters, Vol. 93, No. 10. (2004), 108302. 2008-04-23T23:55:21-00:00 2004 Physical Review Letters 93 10 108302 American Physical Society clusters colloids gel weitz http://www.citeulike.org/user/dchen/article/2710243 <i>Physical Review Letters, Vol. 95, No. 4. (2005)</i><br /><br />Colloidal silica gels are shown to stiffen with time, as demonstrated by both dynamic light scattering and bulk rheological measurements. Their elastic moduli increase as a power law with time, independent of particle volume fraction; however, static light scattering indicates that there are no large-scale structural changes. We propose that increases in local elasticity arising from bonding between neighboring colloidal particles can account for the strengthening of the network, while preserving network structure. Time-Dependent Strength of Colloidal Gels S Manley Benny Davidovitch Neil Davies L Cipelletti AE Bailey RJ Christianson U Gasser V Prasad PN Segre MP Doherty S Sankaran AL Jankovsky B Shiley J Bowen J Eggers C Kurta T Lorik DA Weitz doi:10.1103/PhysRevLett.95.048302 Physical Review Letters, Vol. 95, No. 4. (2005) 2008-04-23T21:08:32-00:00 2005 Physical Review Letters 95 4 APS colloids gel weitz http://www.citeulike.org/user/dchen/article/2563121 <i>Physical Review Letters, Vol. 98, No. 3. (2007)</i><br /><br />The elastic properties of fcc crystals consisting of charge stabilized colloidal particles are determined from real space imaging experiments using confocal microscopy. The normal modes and the force constants of the crystal are obtained from the fluctuations of the particles around their lattice sites using the equipartition theorem. We show that the Cauchy relation is not fulfilled and that only noncentral many-body forces can account for the elastic properties. Noncentral Forces in Crystals of Charged Colloids D Reinke H Stark HH von Grünberg Andrew Schofield G Maret U Gasser doi:10.1103/PhysRevLett.98.038301 Physical Review Letters, Vol. 98, No. 3. (2007) 2008-03-19T17:11:08-00:00 2007 Physical Review Letters 98 3 APS 2007 charge colloids