Spacial and temporal dynamics of the volume fraction of the colloidal particles inside a drying sessile drop

Details Spacial and temporal dynamics of the volume fraction of the colloidal particles inside a drying sessile drop Spacial and temporal dynamics of the volume fraction of the colloidal particles inside a drying sessile drop

2010-08-28

arxiv.org/abs/1008.4840v1

Colloid Polym Sci (2011) 289:1015-1023

Physics

Condensed Matter

Soft Condensed Matter

Submitted to EPJE, 7 pages, 8 figures

Scientific paper

10.1007/s00396-011-2418-8

Using lubrication theory, drying processes of sessile colloidal droplets on a solid substrate are studied. A simple model is proposed to describe temporal dynamics both the shape of the drop and the volume fraction of the colloidal particles inside the drop. The concentration dependence of the viscosity is taken into account. It is shown that the final shapes of the drops depend on both the initial volume fraction of the colloidal particles and the capillary number. The results of our simulations are in a reasonable agreement with the published experimental data. The computations for the drops of aqueous solution of human serum albumin (HSA) are presented.

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