2026-09-19T07:38:52Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/16778 2023-07-10 col_2142_13836 col_2142_5131 com_2142_13835 com_2142_234 com_2142_5130

Luijten, Erik Luijten, Erik Goldbart, Paul M. Lewis, Jennifer A. Schweizer, Kenneth S. Barr, Stephen A. 2010-08-20T17:57:36Z 2010-08-20T17:57:36Z 2010-08-20T17:57:36Z 2010-08 In this dissertation I present my research on the effective interactions of colloidal particles induced by a smaller species, as well as the structure of colloidal particles undergoing freeze casting. In this research I have used a wide variety of computational techniques in order to understand these systems. Specifically, in Chapter 2 I study nanoparticle haloing in a system of silica microspheres and highly charged polystyrene nanoparticles. Computer simulations are employed to determine the effective microsphere– microsphere potential induced by the nanoparticles. From these simulations I am also able to determine the degree of nanoparticle adsorption on the microsphere surface. In Chapter 3 I investigate the depletion interaction in a system of charged microspheres and rigid rods. The effect of both rod concentration and screening length is explored. In Chapter 4 I study the effective interactions between charged colloids in the presence of multivalent counterions. The role of colloid charge is investigated and the onset of like-charged attraction is determined and compared with theoretical predictions. In order to study this system, I extended the geometric cluster algorithm to efficiently simulate systems interacting through the Coulomb potential. In Chapter 5 computer simulations are employed to elucidate the experimentally observed crystal phases of the Q and MS-2 virus particles in solution with multivalent salt and non-adsorbing polymer. Freeze casting is studied in Chapter 6. In this process colloidal particles are pushed by an advancing ice front. I use molecular dynamics simulations to study the dynamics of the colloidal particles and the resulting structures formed. iii Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-05-14T14:27:44Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Barr_Stephen.pdf: 788274 bytes, checksum: 1824dddbffe9329655f49fa19d18d6b0 (MD5) Made available in DSpace on 2010-08-20T17:57:36Z (GMT). No. of bitstreams: 3 Barr_Stephen.pdf: 788274 bytes, checksum: 1824dddbffe9329655f49fa19d18d6b0 (MD5) 1_Barr_Stephen.pdf: 788272 bytes, checksum: 343be075e59ea0c94d5d2fd4cddad0f8 (MD5) license.txt: 4060 bytes, checksum: 70ad705c2659b3979d164cb424240b02 (MD5) http://hdl.handle.net/2142/16778 en Copyright 2010 Stephen A. Barr colloid computer simulation nanoparticle Monte Carlo molecular dynamics Structural properties and phase behavior in colloidal suspensions Materials Science & Engineerng 1919 Materials Science & Engr 0130 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Materials Sci & Engr -UIUC 10KS0130PHD