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Material patterning on substrates by manipulation of fluidic behavior.

Yitan Li1,2, Hao Wang3, Henglu Xu1

  • 1Key Laboratory for the Physics and Chemistry of Nanodevices, Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

National Science Review
|October 25, 2021
PubMed
Summary
This summary is machine-generated.

Researchers engineered fluidic flow for controlled material patterning. A top-heating, bottom-cooling setup creates a stable vortex for ordered crystal growth, enabling large-scale fabrication of functional materials.

Keywords:
Marangoni flowcontact lineflexible devicelarge-scale material patterningtemperature gradient

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Area of Science:

  • Materials Science
  • Fluid Dynamics
  • Nanotechnology

Background:

  • Solution-based material patterning is crucial for diverse applications.
  • Fluidic flow during patterning significantly impacts material crystallization and assembly.
  • Conventional substrate heating methods can induce irregular flow patterns.

Purpose of the Study:

  • To demonstrate the critical role of fluidic behavior in material patterning.
  • To develop a methodology for engineering flow patterns to control crystallization and assembly.
  • To achieve ordered, large-scale patterning of functional materials.

Main Methods:

  • Experimental investigation of fluidic behavior under different heating conditions.
  • Computational fluid dynamics (CFD) simulations to analyze flow patterns.
  • Fabrication of patterned materials using a novel top-heating-bottom-cooling (THBC) setup.
  • Characterization of patterned iodide perovskite crystals and other functional materials.

Main Results:

  • Substrate heating creates irregular vortexes, hindering ordered patterning.
  • A top-heating-bottom-cooling (THBC) setup generates a single Marangoni vortex.
  • The THBC method enables controlled, large-scale fabrication of ordered iodide perovskite crystal patterns.
  • Successful patterning of diverse materials including inorganic, organic, hybrid, and biological categories.

Conclusions:

  • Engineering fluidic flow is a key strategy for precise material patterning.
  • The THBC setup provides a robust method for achieving ordered nanomaterial assembly.
  • This approach offers a general and feasible strategy for patterning various functional materials for practical applications.