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A Femtoliter Droplet Array for Massively Parallel Protein Synthesis from Single DNA Molecules
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Bioinspired programmable wettability arrays for droplets manipulation.

Lingyu Sun1,2, Feika Bian2, Yu Wang2

  • 1Department of Clinical Laboratory, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 210008 Nanjing, China.

Proceedings of the National Academy of Sciences of the United States of America
|February 20, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel surface with programmable wettability arrays inspired by plant stomata. This surface enables precise control over liquid droplet manipulation, offering new possibilities for microfluidics and printing applications.

Keywords:
bioinspireddropletmicrofluidicsprintingwettability

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Area of Science:

  • Materials Science
  • Microfluidics
  • Surface Chemistry

Background:

  • Liquid droplet manipulation is crucial in diverse fields, from lab research to daily applications.
  • Existing techniques for droplet control face limitations in precision and versatility.

Purpose of the Study:

  • To create a surface with programmable wettability arrays for advanced droplet manipulation.
  • To mimic the microstructure of plant stomata for enhanced surface functionality.

Main Methods:

  • Fabrication of a composite film using coaxial capillary microfluidics with graphene oxide (GO) hybrid N-isopropylacrylamide (NIPAM) hydrogel and silica nanoparticles in an ethoxylated trimethylolpropane triacrylate (ETPTA) phase.
  • Surface modification with fluorosilane to achieve hydrophobic properties.
  • Utilizing the photothermal effect of GO with near-infrared (NIR) irradiation to induce reversible changes in surface wettability.

Main Results:

  • Development of a surface with switchable droplet adhesion properties.
  • Demonstration of controllable droplet sliding along programmable wettability pathways.
  • Successful implementation of effective droplet transfer for printing applications with mask integration.

Conclusions:

  • The developed surface offers a novel platform for precise and remote control of liquid droplets.
  • The programmable wettability arrays provide a versatile tool for microfluidic applications and advanced printing techniques.
  • This approach overcomes limitations of existing methods for droplet manipulation and transfer.