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The evolution of spatial ordering of oil drops fast spreading on a water surface

Author

Listed:
  • Daigo Yamamoto

    (Doshisha University)

  • Chika Nakajima

    (Doshisha University)

  • Akihisa Shioi

    (Doshisha University)

  • Marie Pierre Krafft

    (Fluorinated Soft Matter Group, Institut Charles Sadron (CNRS), University of Strasbourg)

  • Kenichi Yoshikawa

    (Laboratory of Life Physics, Faculty of Life and Medical Sciences, Doshisha University)

Abstract

The design of dynamically self-assembled systems is of high interest in science and technology. Here, we report a unique cascade in the self-ordering of droplets accompanied by a dewetting transition. The dynamic self-emergent droplets are observed when a thin liquid layer of an immiscible fluorocarbon oil (perfluorooctyl bromide, PFOB) is placed on a water surface. Due to the gradual evaporation of PFOB, a circular PFOB-free domain appears as a result of a local dewetting transition. A circular pearling structure is generated at the rim with the growth of the dewetting hole. As the next stage, linear arrays of droplets are generated in a radial manner from the centre of the hole. These one-dimensional arrangements then evolve into two-dimensional hexagonal arrays of microdroplets through collective rhythmical shrinking/expanding motions. The emergence of such dynamic patterns is discussed in terms of the nonlinear kinetics of the dewetting transition under thermodynamically dissipative conditions.

Suggested Citation

  • Daigo Yamamoto & Chika Nakajima & Akihisa Shioi & Marie Pierre Krafft & Kenichi Yoshikawa, 2015. "The evolution of spatial ordering of oil drops fast spreading on a water surface," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8189
    DOI: 10.1038/ncomms8189
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