期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.258302
关键词
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资金
- Royal Society
- European Research Council (ERC) [617266]
- EPSRC [EP/H022333/1]
- Japan Society for the Promotion of Science (JSPS)
- Grants-in-Aid for Scientific Research [26400425, 25000002, 26103507] Funding Source: KAKEN
- Engineering and Physical Sciences Research Council [EP/H022333/1] Funding Source: researchfish
- EPSRC [EP/H022333/1] Funding Source: UKRI
Colloidal gels are out-of-equilibrium structures, made up of a rarefied network of colloidal particles. Comparing experiments to numerical simulations, with hydrodynamic interactions switched off, we demonstrate the crucial role of the solvent for gelation. Hydrodynamic interactions suppress the formation of larger local equilibrium structures of closed geometry, and instead lead to the formation of highly anisotropic threads, which promote an open gel network. We confirm these results with simulations which include hydrodynamics. Based on three-point correlations, we propose a scale-resolved quantitative measure for the anisotropy of the gel structure. We find a strong discrepancy for interparticle distances just under twice the particle diameter between systems with and without hydrodynamics, quantifying the role of hydrodynamics from a structural point of view.
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