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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
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Localization in liquid phase separation: Coarsening and stable structures.

Avanish Kumar1, Chaitanya Narayanam2, Rajesh Khanna2

  • 1School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India.

Physical Review. E
|January 23, 2020
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Summary
This summary is machine-generated.

This study introduces a novel templating technique to control pattern formation in self-organizing systems by suppressing diffusion. The method enables the creation of stable, complex localized structures for advanced materials.

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Area of Science:

  • Complex systems
  • Materials science
  • Chemical engineering

Background:

  • Self-organizing systems exhibit complex pattern formation.
  • Controlling diffusion is key to stabilizing these patterns.
  • Existing methods lack precise control over pattern localization.

Purpose of the Study:

  • To present a novel source-sink-boundary templating technique for controlled pattern formation.
  • To investigate the dynamics of pattern stabilization by spontaneous diffusion suppression.
  • To explore the formation of localized structures in liquid films on heterogeneous substrates.

Main Methods:

  • Three-dimensional numerical simulations of pattern dynamics.
  • Application of a source-sink-boundary templating technique.
  • Analysis of liquid films on chemically heterogeneous substrates with asymmetric double-well free energy.

Main Results:

  • The templating technique successfully creates stable, complex patterns by suppressing diffusion.
  • Two pathways (defect and direct) lead to localized structures, with film thickness influencing the choice.
  • Patterns form via "localization" in the inner region and arrested diffusion in the outer region.

Conclusions:

  • The templating technique offers a systematic approach to creating controlled nano- and submicrometer structures.
  • These structures can serve as building blocks for advanced, tailored materials.
  • Understanding diffusion dynamics is crucial for designing functional materials.