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Issue 13, 2021

Controlling uniform patterns by evaporation of multi-component liquid droplets in a confined geometry

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Abstract

Surface-coating technologies are important for a variety of applications, e.g. ink-jet printing, micro-electronic engineering and biological arrays. In this study, we introduce a novel idea to obtain uniform patterns with multi-component solution in a confined geometry. When a droplet of the multi-component liquid evaporates in the confined area, the evaporated vapors are stagnated inside the confined chamber where the evaporated liquid molecule is much heavier than the ambient air. These vapors change internal flow in the droplet by generating Marangoni effects during evaporation, which help to obtain uniform deposition. Finally, we show that a coffee-ring is totally suppressed and a uniformly dried pattern is achieved. For a potential application as display panels, we use quantum dots and create a uniform light-emitting layer.

Graphical abstract: Controlling uniform patterns by evaporation of multi-component liquid droplets in a confined geometry

Supplementary files

Article information


Submitted
20 Oct 2020
Accepted
03 Dec 2020
First published
07 Dec 2020

Soft Matter, 2021,17, 3578-3585
Article type
Paper

Controlling uniform patterns by evaporation of multi-component liquid droplets in a confined geometry

J. Pyeon and H. Kim, Soft Matter, 2021, 17, 3578 DOI: 10.1039/D0SM01872D

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