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Formation of Liquid–Liquid Micropatterns through Guided Liquid Displacement on Liquid‐Infused Surfaces
Author(s) -
Paulssen Dorothea,
Feng Wenqian,
Pini Ivana,
Levkin Pavel A.
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201800852
Subject(s) - materials science , lubricant , surface tension , surface energy , silicone , silicone oil , chemical engineering , aqueous solution , polymer , liquid liquid , phase (matter) , nanotechnology , composite material , organic chemistry , chromatography , chemistry , thermodynamics , physics , engineering
Here a method is demonstrated to pattern liquids of varying surface tension and composition into droplets by utilizing slippery liquid‐infused surfaces prepared on chemically‐patterned substrates. The capability of different liquids to displace the lubricant from higher surface energy regions is studied and it is shown that both high and low surface tension liquids can imbibe the polymer, thereby forming droplets sharply following underlying surface energy patterns. For all liquids tested, droplet arrays of arbitrary shapes of each liquid are formed with precision down to 50 µm. By changing the chemical patterning from fluorinated to aliphatic groups, patterns of mineral and silicone oils are created. Finally, formation of 2D micropatterns of three‐phase liquid systems—fluorinated, organic, and aqueous phases—is demonstrated.