New Collapse Mechanism of Colloidal Particle Monolayers via Depletion Pressure: Formation of Large-Area Particle Multilayers at the Air-Water Interface

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Various collapse mechanisms of colloidal particle layers (e.g., wrinkling, flipping, folding, etc.) at a fluid-fluid interface have been reported, but formation of particle multilayers with large areas has not been observed yet. With the help of depletion pressure that provides a resistance to out-of-plane deformations of a colloidal particle monolayer, we report a new collapse mechanism of the particle monolayer at an air-water interface, which forms large-area particle multilayers with more than two layers. Furthermore, by adjusting the strength of the depletion pressure or the compression distance at the state of collapse, we also observe that the number of layers of particle multilayers varies significantly, and these results agree well with classical theories for thin elastic films floating atop water.
Publisher
AMER CHEMICAL SOC
Issue Date
2019-11
Language
English
Article Type
Article
Citation

JOURNAL OF PHYSICAL CHEMISTRY C, v.123, no.45, pp.27862 - 27867

ISSN
1932-7447
DOI
10.1021/acs.jpcc.9b06963
URI
http://hdl.handle.net/10203/268831
Appears in Collection
CBE-Journal Papers(저널논문)
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