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Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...

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A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles

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Thermal Radiation Sensors Based on Ionic-Conducting Pectin Films.

Ezekiel Y Hsieh¹, Elizabeth T Hsiao-Wecksler¹, SungWoo Nam²

¹Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|July 17, 2025

Summary

Researchers developed stable, non-contact temperature sensing electronic skin using pectin films. This breakthrough advances touch-free robotic interfaces by mimicking human skin

Keywords:

electronic skin iontronic non‐contact sensing pectin

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Last Updated: Sep 15, 2025

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Area of Science:

Materials Science
Robotics
Biomedical Engineering

Background:

Human-robot interaction requires advanced sensing capabilities.
Electronic skins mimic human skin but lack non-contact temperature sensing.
Pectin films offer high contact temperature sensitivity but have stability issues.

Purpose of the Study:

To investigate and improve non-contact thermal radiation sensing using pectin films.
To enhance the stability and performance of iontronic sensors for electronic skin applications.
To develop touch-free interfaces for human-centered robotic systems.

Main Methods:

Implemented an alternating current (AC) configuration for pectin film iontronic sensors.
Studied various polymeric coatings to prevent pectin film dehydration.
Analyzed non-contact temperature sensing response against radiative heat transfer models.

Main Results:

Achieved substantially improved stability in thermal radiation iontronic sensing.
Demonstrated that pectin film sensors exhibit non-contact temperature sensing matching analytical models.
Identified effective polymeric coatings for prolonged sensor performance.

Conclusions:

Pectin-based electronic skins show significant promise for non-contact temperature sensing.
The developed AC configuration enhances iontronic sensor stability.
These findings pave the way for advanced touch-free robotic interfaces.