The effect of attractions on the local structure of liquids and colloidal fluids
arXiv:1101.1644 · doi:10.1063/1.3516210
Abstract
We revisit the role of attractions in liquids and apply these concepts to colloidal suspensions. Two means are used to investigate the structure; the pair correlation function and a recently developed topological method. The latter identifies structures topologically equivalent to ground state clusters formed by isolated groups of 5 < m < 13 particles, which are specific to the system under consideration. Our topological methodology shows that, in the case of Lennard-Jones, the addition of attractions increases the system's ability to form larger (m>8) clusters, although pair-correlation functions are almost identical. Conversely, in the case of short-ranged attractions, pair correlation functions show a significant response to adding attraction, while the liquid structure exhibits a strong decrease in clustering upon adding attractions. Finally, a compressed, weakly interacting system shows a similar pair structure and topology.
arXiv comment22 pages
References in corpus (12)
- Global Optimization by Basin-Hopping and the Lowest Energy Structures of Lennard-Jones Clusters Containing up to 110 Atoms
- Extended corresponding-states behavior for particles with variable range attractions
- Understanding fragility in supercooled Lennard-Jones mixtures. I. Locally preferred structures
- Nonperturbative effect of attractive forces in viscous liquids
- Confirmation of Anomalous Dynamical Arrest in attractive colloids: a molecular dynamics study
- A repulsive reference potential reproducing the dynamics of a liquid with attractions
- Re-entrant melting and freezing in a model system of charged colloids
- How short-range attractions impact the structural order, self-diffusivity, and viscosity of a fluid
- Geometric frustration in small colloidal clusters
- Locally preferred structure in simple atomic liquids
- A structural comparison of models of colloid-polymer mixtures
- Topological Classification of Clusters in Condensed Phases
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- Real Space Analysis of Colloidal Gels: Triumphs, Challenges and Future Directions
- Investigating isomorphs with the topological cluster classification
- The role of quench rate in colloidal gels
- Monte Carlo computer simulations and electron microscopy of colloidal cluster formation via emulsion droplet evaporation
- Active Brownian Particles in Random and Porous Environments
- Effect of attractions on correlation length scales in a glass-forming liquid
- Facile equilibration of well-entangled semiflexible bead-spring polymer melts
- Local structure of Liquid-Vapour Interfaces
- How attractive and repulsive interactions affect structure ordering and dynamics of glass-forming liquids?
- Factors influencing thermal solidification of bent-core trimers
- The microscopic pathway to crystallization in supercooled liquids
- Isomorphs in nanoconfined liquids