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Long-range attraction between colloidal spheres at the air-water interface: The consequence of an irregular meniscus
Abstract
Recent observations of charged colloidal particles trapped at the air-water interface revealed long-range interparticle attractive forces, not accounted for by the standard theories of colloidal interactions. We propose a mechanism for attraction which is based on nonuniform wetting causing an irregular shape of the particle meniscus. The excess water surface area created by these distortions can be minimized when two adjacent particles assume an optimum relative orientation and distance. Typically, for spheres with diameter of 1 &mgr;m at an interparticle distance of 2 &mgr;m, deviations from the ideal contact line by as little as 50 nm result in an interaction energy of the order of 10(4)kT. Roughness-induced capillarity explains the experimental findings, including the cluster dissolution caused by addition of detergent to the subphase and the formation of linear aggregates. This kind of interaction should also be of importance in particle-stabilized foams and emulsions.
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Cited by
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The role of particles in stabilising foams and emulsions
Hunter, T. N., Pugh, R. J., Franks, G. V., & Jameson, G. J. (2008) · Advances in Colloid and Interface Science · doi:10.1016/j.cis.2007.07.007 · Cited by 1,063
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Metadata
- Authors
- Stamou, D., Duschl, C., & Johannsmann, D.
- Venue
- Physical Review E
- Publisher
- American Physical Society (APS)
- Published
- 2000-10-01
- Volume
- 62
- Issue
- 4
- Pages
- 5263-5272
- ISSN
- 1063-651X (ISSN-L)
- 1095-3787
- OpenAlex
- W2012849556
- Cited by
- 467
- References
- 0
- FWCI
- 5.10
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Long-range attraction between colloidal spheres at the air-water interface: The consequence of an irregular meniscus. https://app.cochat.ai/papers/10.1103/physreve.62.5263
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- Stamou, D., Duschl, C., & Johannsmann, D. (2000). Long-range attraction between colloidal spheres at the air-water interface: The consequence of an irregular meniscus. Physical Review E. https://doi.org/10.1103/physreve.62.5263
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
