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Related Experiment Video

Updated: Aug 11, 2025

A Detailed Protocol for Perspiration Monitoring Using a Novel, Small, Wireless Device
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Reversible Perspiring Artificial "Fingertips".

Dongyu Zhang1,2, Jacques Peixoto1,2, Yuanyuan Zhan1,2

  • 1Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Groene Loper 3, Eindhoven, 5612 AE, Netherlands.

Advanced Materials (Deerfield Beach, Fla.)
|February 6, 2023
PubMed
Summary

Researchers created a biomimetic fingertip that mimics human perspiration and friction using liquid crystals. This artificial fingertip can control sliding properties, offering potential applications in robotics and biomedical devices.

Keywords:
fingerprint mimeticsliquid crystal networksresponsive polymer materialstriggered reagent perspiration

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Area of Science:

  • Materials Science
  • Biomimicry
  • Soft Robotics

Background:

  • Human fingertip perspiration is crucial for survival and biological success, enabling controlled friction.
  • Existing materials lack the ability to mimic the complex processes of human skin, such as perspiration and friction control.

Purpose of the Study:

  • To recreate the human ability of extensive perspiration and controlled friction using self-assembled cholesteric liquid crystals.
  • To develop a biomimetic fingertip with controllable anti-sliding properties comparable to human fingertips.

Main Methods:

  • Inducing porosity in a liquid-bearing material via controlled-polymerization phase-separation.
  • Emulating fingerprint topography by balancing chirality-induced and substrate-anchoring forces during synthesis.
  • Utilizing light illumination to control liquid secretion and re-absorption in the artificial fingertips.

Main Results:

  • Developed artificial fingertips capable of secreting and re-absorbing liquid upon light illumination.
  • Demonstrated controllable anti-sliding properties in the soft material, comparable to human fingertips.
  • Achieved a higher degree of biomimicry in the artificial fingertip design.

Conclusions:

  • The biomimetic fingertip successfully mimics human perspiration and friction control.
  • The developed material exhibits potential for applications in biomedical instruments and soft robotic devices.
  • This research advances the field of biomimicry for soft robotic and interactive technologies.