Taming Self-Organization Dynamics to Dramatically Control Porous Architectures

ACS Nano
Ronan DalyJohn J Boland

Abstract

We demonstrate templating of functional materials with unexpected and intricate micro- and nanostructures by controlling the condensation, packing, and evaporation of water droplets on a polymer solution. Spontaneous evaporation of a polymer solution induces cooling of the liquid surface and water microdroplet condensation from the ambient vapor. These droplets pack together and act as a template to imprint an entangled polymer film. This breath figure (BF) phenomenon is an example of self-organization that involves the long-range ordering of droplets. Equilibrium-based analysis provides many insights into contact angles and drop stability of individual drops, but the BF phenomenon remains poorly understood thus far, preventing translation to real applications. Here we investigate the dynamics of this phenomenon to separate out the competing influences and then introduce a modulation scheme to ultimately manipulate the water vapor-liquid equilibrium independently from the solvent evaporation. This approach to BF control provides insights into the mechanism, a rationale for microstructure design, and evidence for the benefits of dynamical control of self-organization systems. We finally present dramatically different porous arch...Continue Reading

References

Jul 1, 1993·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·A SteyerD Beysens
Jul 1, 1990·Physical Review. B, Condensed Matter·A SteyerC M Knobler
May 13, 1996·Physical Review Letters·A V LimayeS B Ogale
Apr 6, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·A BolognesiA Turturro
Jul 1, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Min Soo Park, Jin Kon Kim
Nov 1, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Hiroshi YabuMasatsugu Shimomura
Apr 29, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Alexandra Muñoz-BonillaJuan Rodriguez-Hernandez
Aug 30, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Ronan DalyJohn J Boland

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Citations

Mar 5, 2021·International Journal of Pharmaceutics·Qingxin ZhangRonan Daly
Jul 13, 2018·ACS Applied Materials & Interfaces·Yizhou WangWei Huang

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