Journal article

Compound sessile drops

Michael J Neeson, Rico F Tabor, Franz Grieser, Raymond R Dagastine, Derek YC Chan

SOFT MATTER | ROYAL SOC CHEMISTRY | Published : 2012

Abstract

Compound drops arise from the contact of three immiscible fluids and can assume various geometric forms based on the interfacial chemistry of the phases involved. Here we present a study of a new class of compound drops that is sessile on a solid surface. The possible geometries are demonstrated experimentally with appropriate fluid combinations and accounted for with a quantitative theoretical description. Although such systems are broadly controlled by relative interfacial energies, subtleties such as the van der Waals force and effects of micro-gravity, despite drop sizes being well below the capillary length, come into play in determining the equilibrium state that is achieved. The dryin..

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Grants

Funding Acknowledgements

This project is funded in part by the Australian Research Council through a Discovery Project Grant. M.J.N. is supported by an Australian Postgraduate Research Award. The PFPC is thanked for infrastructure support.