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Crystallization, Vitri cation, and Gelation of Patchy Colloidal Particles
Wang Haijun
Author NameAffiliationE-mail
Wang Haijun College of Chemistry and Environmental Science, Hebei University whj@hbu.edu.cn 
Abstract:
We present the phase diagrams for neutral patchy colloidal particles whose surface is decorated by f identical patches, where each patch serves as an associating site. The hard-core Lennard-Jones (LJ) potential and associating interaction are incorporated into the free energies of patchy particles in phases of the fluid (F), random close packing (RCP), and face-centered-cubic (FCC) crystal. A rich phase structure of patchy particles consisting of F-F, F-RCP, and F-FCC transitions can be observed. Meanwhile, the sol-gel transition (SGT) characterizing the connectivity of patchy particles is also investigated. It is shown that, depending on the number of patches and associating energy, the F-F transition might be metastable or stable with respect to the F-RCP and F-FCC transitions. Meanwhile, the critical temperatures, critical densities, triple points, and SGT can be significantly regulated by these factors. It is expected that the present study is helpful to understand the phase structure and aggregated behavior of the relevant patchy systems.
Key words:  Patchy Particle, Sol-gel Transition, Phase Transition, Glass Transition
FundProject:
Crystallization, Vitri cation, and Gelation of Patchy Colloidal Particles
王海军
摘要:
We present the phase diagrams for neutral patchy colloidal particles whose surface is decorated by f identical patches, where each patch serves as an associating site. The hard-core Lennard-Jones (LJ) potential and associating interaction are incorporated into the free energies of patchy particles in phases of the fluid (F), random close packing (RCP), and face-centered-cubic (FCC) crystal. A rich phase structure of patchy particles consisting of F-F, F-RCP, and F-FCC transitions can be observed. Meanwhile, the sol-gel transition (SGT) characterizing the connectivity of patchy particles is also investigated. It is shown that, depending on the number of patches and associating energy, the F-F transition might be metastable or stable with respect to the F-RCP and F-FCC transitions. Meanwhile, the critical temperatures, critical densities, triple points, and SGT can be significantly regulated by these factors. It is expected that the present study is helpful to understand the phase structure and aggregated behavior of the relevant patchy systems.
关键词:  Patchy Particle, Sol-gel Transition, Phase Transition, Glass Transition
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