A particle transport study of vertical evaporation-driven colloidal deposition by the coffee-ring theory

作者：Diao J J; Xia M G

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2009, 338(1-3): 167-170.

DOI：10.1016/j.colsurfa.2008.12.030

• Self-assembly
• Vertical evaporation-driven colloidal deposition
• Colloidal particles
• Film growth
• Evaporation
• Coffee ring

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.

• 出版日期2009-4-15
• 单位西安交通大学