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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Gel transition in adhesive hard-sphere colloidal dispersions: the role of gravitational effects.
    Author: Kim JM, Fang J, Eberle AP, Castañeda-Priego R, Wagner NJ.
    Journal: Phys Rev Lett; 2013 May 17; 110(20):208302. PubMed ID: 25167458.
    Abstract:
    The role of gravity in gelation of adhesive hard spheres is studied and a critical criterion developed for homogeneous gelation within the gas-liquid binodal. We hypothesize that gelation by Brownian diffusion competes with phase separation enhanced by gravitational settling. This competition is characterized by the gravitational Péclet number Pe(g), which is a function of particle size, volume fraction, and gravitational acceleration. Through a systematic variation of the parameters, we observe the critical Pe(g) of ∼ 0.01 can predict the stability of gels composed of adhesive hard spheres.
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