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Interdiffusion and crystallization of oppositely charged colloids

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Abstract

The aggregation of oppositely charged colloids, usually denoted as heteroaggregation, is often used in colloidal processing, for which a precise control of the basic mechanisms of aggregate formation is of crucial importance. A promising way to achieve a better degree of control is to guide heteroaggregation by imposing geometric constraints. Here, we consider this possibility by simulating the heteroaggregation of two oppositely charged suspensions which are initially separated and then put into contact through a planar interface. Our Brownian dynamics simulations show that this type of heteroaggregation allows the formation of mixed films whose thickness can be controlled by tuning the interactions between the particles or by changing the colloidal concentration in the initial suspensions. The dependence of the type of crystalline order in these films on these parameters is also analyzed.

Graphical abstract: Interdiffusion and crystallization of oppositely charged colloids

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Publication details

The article was received on 28 Aug 2017, accepted on 03 Nov 2017 and first published on 03 Nov 2017


Article type: Paper
DOI: 10.1039/C7CP05872A
Citation: Phys. Chem. Chem. Phys., 2017, Advance Article
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    Interdiffusion and crystallization of oppositely charged colloids

    M. Cerbelaud, C. T. Tran, R. Ferrando, B. Crespin and A. Videcoq, Phys. Chem. Chem. Phys., 2017, Advance Article , DOI: 10.1039/C7CP05872A

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