Fabrication of microstructured polymer films using breath-figure-templated assembly

ORAL

Abstract

Breath figures formed on evaporating polymer solutions exposed to the blast of humid air involve growth and self-assembly of water drops that are non-coalescent. The ordered arrays of nearly monodisperse drops, eventually evaporate away, leaving a microstructured, porous polymer film. We elucidate the mechanism of this breath-figure-templated assembly, by accounting for various transport and thermodynamic processes that control the dynamics of drop nucleation, growth, noncoalescence and self-assembly. The theoretical framework developed in this study allows one to rationalize and predict the structure and size of pores. We provide an exemplary study where we use coat these films with inorganic oxides and mimic the structural color of Papilio palinurus butterfly.

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Authors

  • Mohan Srinivasarao

    Center for Advnaced Research on Optical Microscopy, Georgia Institute of Technology, School of Polymer, Textile \& Fiber Eng., Georgia Tech. Atlanta, GA 30332, School of Polymer, Textile, and Fiber Engineering, Georgia Institute of Technology, Georgia Institute of Technology, School of Polymer, Textile \& Fiber Eng, Gerogia Tech., Atlanta, GA 30332, School of Polymer, Textile and Fiber Eng., Georgia Tech., Atlanta, GA 30332

  • Vivek Sharma

    Hatsopoulos Microfluids Laboratory, Dept of Mechanical Eng., MIT, Cambridge, MA 02139, Hatsopoulos Microfluids Laboratory, Mechanical Eng., MIT, Cambridge, MA, Hatsopoulos Microfluids Laboratory, Mechanical Eng., MIT, Cambridge, MA 02139

  • Matija Crne

    Procter \& Gamble, Germany