What is it about?
In this work I show that for liquid binary mixtures confined on a sphere one can define a single (scalar) quantity that reflects the mixing state of the fluid and that can be computed once the structure of the confined mixture is known. I call this parameter geodesic mixing parameter. I show that such a quantity is useful to characterize the effect of bulk particle adsorption on the mixing state of the fluid. Void formation is also investigated under different conditions. I find that large void formation is suppressed when large fluctuating domains characterize the fluid structure.
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Why is it important?
My work points out that studying mixing-demixing transition on a sphere gives the (unique) possibility to define a quantity that tells "in one shot" which is the mixing state of a multi-component fluid, It opens then a new route to investigate confined mixtures under different physico-chemical conditions and offers a new perspective for the analysis of structural data in membranes, armored bubbles, pickering emulsions and other systems of physical interest.
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This page is a summary of: Mixing-demixing transition and void formation in quasi-2D binary mixtures on a sphere, The Journal of Chemical Physics, January 2022, American Institute of Physics, DOI: 10.1063/5.0080352.
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