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Fabricating Polymer Canopies onto Structured Surfaces Using Liquid Scaffolds.

Benny Chen1, Robert J Frank-Finney1, Malancha Gupta1

  • 1Mork Family Department of Chemical Engineering and Materials Science, University of Southern California , Los Angeles, California 90089, United States.

ACS Applied Materials & Interfaces
|September 18, 2015
PubMed
Summary

This study introduces a novel liquid scaffolding technique for polymer canopy deposition on structured surfaces using initiated chemical vapor deposition (ICVD). This method precisely shapes polymer films by templating liquid surfaces for advanced material fabrication.

Keywords:
chemical vapor depositioncoatingspolymersthin films

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Fabricating precise polymer structures on surfaces is crucial for advanced materials.
  • Existing methods often lack control over polymer film morphology and location.
  • Developing adaptable templating strategies is essential for micro/nanofabrication.

Purpose of the Study:

  • To investigate the use of liquid scaffolds with initiated chemical vapor deposition (ICVD) for polymer canopy fabrication.
  • To demonstrate control over polymer canopy shape, size, and location on structured surfaces.
  • To present a versatile scaffolding method applicable to various vapor deposition techniques.

Main Methods:

  • Utilizing liquid scaffolds on micropillar and microstructure surfaces as templates for polymer deposition.
  • Employing initiated chemical vapor deposition (ICVD) for polymer film formation.
  • Investigating two liquid placement methods: Cassie-Baxter state with high surface tension liquids and inverted structured surfaces on low surface tension liquids.

Main Results:

  • Successfully deposited polymer canopies conforming to liquid scaffold shapes on structured surfaces.
  • Demonstrated control over canopy location and size using liquid volume and position in the Cassie-Baxter method.
  • Showcased control over canopy coverage and height by adjusting liquid layer area and thickness in the inverted surface method.

Conclusions:

  • The liquid scaffolding approach provides precise control over polymer canopy fabrication on structured surfaces.
  • This templating method is versatile and can be adapted for various vapor deposition processes beyond ICVD.
  • The findings offer a new pathway for creating complex polymer microstructures with tailored properties.