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Issue 25, 2017
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Free-standing monolayer films of ordered colloidal particles

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We report a novel method for the fabrication of large area, free standing monolayer films of close-packed colloidal particles. The method involves creating a free-standing, wet film of colloidal dispersion containing mono-dispersed hard particles (such as polystyrene or silica) mixed with smaller and softer polymer particles. During drying, hard particles present in the free standing film arrange in a hexagonal close-packed structure in a monolayer while the softer particles fill the interstices, and deform and coalesce to produce a continuous matrix around the hard particles. The deformation of the soft particles dissipates the stress generated during drying thereby preventing rupture of the monolayer film. The method is facile and very general, applicable to a large variety of colloidal particles. The monolayer films exhibit strong iridescence indicating potential application in photonic devices.

Graphical abstract: Free-standing monolayer films of ordered colloidal particles

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Publication details

The article was received on 25 Feb 2017, accepted on 17 May 2017 and first published on 19 May 2017

Article type: Paper
DOI: 10.1039/C7SM00407A
Citation: Soft Matter, 2017,13, 4520-4525
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    Free-standing monolayer films of ordered colloidal particles

    A. Yadav and M. S. Tirumkudulu, Soft Matter, 2017, 13, 4520
    DOI: 10.1039/C7SM00407A

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