Self-assembly of particles via controlled evaporation
July 31-August 4, 2017
Evaporation of solvent from a dispersion is a simple and effective method to direct the self-assembly of colloidal scale materials. In particular, the drying of particle laden sessile drops has received considerable attention since pioneering work in the late 1990’s. Upon evaporation, suspension drops leave a distinct ring-like deposit of particles at the periphery of the drop. It is widely accepted that physics of pattern formation in drying of drops containing in-soluble material is identical to that observed in drying of a coffee drop. Both the formation and suppression of coffee-stains are fundamentally and technologically important. There is need for the design of strategies to prevent coffee stains, which are unwanted in several applications. However, there are several reports where the desirable consequences of coffee-stain formation are exploited – especially in the field of separation technology and in the detection and diagnosis of diseases.
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Basavaraja Madivala Gurappa, VR Dugyala, H Lama, Dillip K. Satapathy, and M Mayarani, "Self-assembly of particles via controlled evaporation" in "Association in Solution IV", Ulf Olsson, Lund University, Sweden Norman Wagner, University of Delaware, USA Anand Yethiraj, Memorial University of Newfoundland, Canada Eds, ECI Symposium Series, (2017). http://dc.engconfintl.org/assoc_solution_iv/42