Growth kinetics of colloidal chains and labyrinths
Haw, Mark D. (2010) Growth kinetics of colloidal chains and labyrinths. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 81 (3). 031402. ISSN 2470-0053 (https://doi.org/10.1103/PhysRevE.81.031402)
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Abstract
Particles interacting by a combination of isotropic short-range attraction and long-range repulsion have been shown to form complex phases despite the apparent simplicity of the interparticle potential. Using computer simulations we study the behavior of two-dimensional systems of colloids with such an interaction, focusing on how area fraction and repulsion range at fixed repulsion gradient may be used to tune the resulting kinetics and nonequilibrium structure. While the short-range attraction leads to aggregation, the long-range repulsion encourages growth of chains of particles due to repulsive intercluster interactions. Depending on area fraction/ repulsion range we observe chain labyrinths, chain-compact aggregate coexistence, and connected networks of chains. The kinetics of cluster growth displays a sequence of connected networks and disconnected cluster or chain systems with increasing repulsion range, indicating the competing roles of connectivity of growing chains and repulsion-driven breakup of chains into compact aggregates. Chain-dominated systems show approximately logarithmic coarsening at late time that we interpret as the result of chains performing random walks in the randomly fluctuating potential landscape created by their neighbors, a situation reminiscent of glassy systems.
ORCID iDs
Haw, Mark D. ORCID: https://orcid.org/0000-0003-3736-1857;-
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Item type: Article ID code: 20644 Dates: DateEventMarch 2010PublishedSubjects: Technology > Engineering (General). Civil engineering (General) > Bioengineering
Technology > Chemical engineering
Science > Chemistry > Physical and theoretical chemistry
Science > Physics > Solid state physics. NanoscienceDepartment: Faculty of Engineering > Chemical and Process Engineering Depositing user: Dr Mark Haw Date deposited: 13 Jul 2010 15:20 Last modified: 30 Nov 2024 13:58 URI: https://strathprints.strath.ac.uk/id/eprint/20644