期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.128302
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资金
- DFG [SFB-TR6]
- DAAD-PPP
- Spanish Government [FIS2008-01339]
- FEDER [AIB2010DE-00263]
Using Brownian dynamics simulations, density functional theory, and analytical perturbation theory we study the collapse of a patch of interfacially trapped, micrometer-sized colloidal particles, driven by long-ranged capillary attraction. This attraction is formally analogous to two-dimensional (2D) screened Newtonian gravity with the capillary length (lambda) over cap as the screening length. Whereas the limit (lambda) over cap -> infinity corresponds to the global collapse of a self-gravitating fluid, for finite (lambda) over cap we predict theoretically and observe in simulations a ringlike density peak at the outer rim of a disclike patch, moving as an inbound shock wave. Possible experimental realizations are discussed.
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