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Related Experiment Video

Updated: Sep 4, 2025

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Light-induced charged slippery surfaces.

Fang Wang1, Meijin Liu1, Cong Liu1

  • 1Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology (SIAT), Chinese Academy of Sciences (CAS), Shenzhen, P. R. China.

Science Advances
|July 20, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel light-induced charged slippery surface (LICS) combining solid and lubricant properties for advanced droplet manipulation. This innovative material offers precise control over droplet movement, with applications in biomedicine.

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Slippery lubricant-infused porous (SLIPS) and superhydrophobic surfaces offer unique properties for applications like self-cleaning and anti-icing.
  • While effective, SLIPS surfaces can compromise droplet manipulation control due to lubricant layer screening.
  • Existing superhydrophobic surfaces have limitations in programmability for droplet control.

Purpose of the Study:

  • To develop a novel slippery material that combines the advantages of both solid and lubricant surfaces.
  • To create a photothermal-responsive composite matrix with light-induced surface charge regeneration for droplet control.
  • To demonstrate precise photocontrol of droplet manipulation for various applications.

Main Methods:

  • Fabrication of a photothermal-responsive composite matrix.
  • Integration of real-time light-induced surface charge regeneration capability.
  • Demonstration of photocontrolled droplet motion including speed, distance, antigravity, and collective motion.

Main Results:

  • The developed light-induced charged slippery surface (LICS) enables photocontrol of droplets.
  • Demonstrated fast speed, long-distance, antigravity, and directionally collective droplet motion.
  • Successfully extended LICS applications to biomedical fields, including hydrogel bead formation and microfluidic-based biological analysis.

Conclusions:

  • LICS offers a new paradigm for programmable droplet manipulation by harnessing light-induced surface charge.
  • The material overcomes limitations of traditional SLIPS and superhydrophobic surfaces.
  • LICS shows significant potential for advanced applications in microfluidics and biomedical diagnostics.