期刊
SOFT MATTER
卷 13, 期 8, 页码 1548-1553出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sm02131j
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资金
- National Science Foundation [CBET-0955003]
- Welch Foundation [C-1755]
The solid-liquid melting transition in a two-dimensional (2-D) attractive colloidal system is visualized using superparamagnetic colloids that interact through a long-range isotropic attractive interaction potential, which is induced using a high-frequency rotating magnetic field. Various experiments, supported by Monte Carlo simulations, are carried out over a range of interaction potentials and densities to determine structure factors, Lindermann parameters, and translational and orientational order parameters. The system shows a first-order solid-liquid melting transition. Simulations and experiments suggest that dislocations and disclinations simultaneously unbind during melting. This is in direct contrast with reports of 2-D melting of paramagnetic particles that interact with a repulsive interaction potential.
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