Journal
Soft Matter
Volume 12, Issue 46, Pages 9377-9382Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sm01883a
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Funding
- ERC [340391-SUPRO]
- Alexander Humboldt Foundation
- National Research Foundation of Korea (NRF) for the National Creative Research Initiative Center for Intelligent Hybrids [2010-0018290]
- IRTG Program [2011-0032203]
- World Class University Program of Chemical Convergence for Energy Environment [R31-10013]
- [COST1106]
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We studied the condensation of water drops on a micro-structured lubricant-infused surfaces. Hierarchical micro-prism surfaces were fabricated by soft imprinting with wet TiO2 nanoparticle paste. After hydrophobization, the patterned surfaces were infused with silicone oil as a lubricant. When cooling at high humidity (over 80%), water drops nucleate and start growing on the surface. Once they have reached a certain size, the drops at neighboring channels of the micro-prisms attract each other and spontaneously form cylindrical chains. These chains of drops align perpendicular to the prism array. The morphology and the length-to-width ratio of the chains of drops depend on the thickness of the lubricant layer. This new concept of water drop alignment on lubricant-infused surfaces offers a new route for pattern formation with condensed drops.
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