Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 338, Issue 1-3, Pages 167-170Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2008.12.030
Keywords
Self-assembly; Vertical evaporation-driven colloidal deposition; Colloidal particles; Film growth; Evaporation; Coffee ring
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Funding
- National Science Foundation of China (NSFC) [10704059]
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In this paper, we present a theoretical discussion about colloidal particles transporting to a meniscus deposition region for the vertical evaporation-driven colloidal deposition by the coffee-ring theory. The vertically immersed Substrate is gradually exposed with a low speed, and colloidal particles are deposited on the substrate as suspension surface descends. Due to a singular evaporation rate at the contact line. to keep a constant contact angle, a solvent flow toward the meniscus region is formed to replenish lost liquid. This solvent flow results in a particle flow to form a film on the substrate. (C) 2008 Elsevier B.V. All rights reserved.
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