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Related Experiment Video

Updated: Jan 20, 2026

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
07:50

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Highly Sensitive and Temperature-Insensitive Stretchable Strain Sensor with Microcrack-Engineered Architecture.

Yu Kato1, Kento Yamagishi1, Kenjiro Fukuda2,3,4

  • 1Department of Electrical Engineering and Information Systems, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 18, 2026
PubMed
Summary

This study presents a highly sensitive, stretchable strain sensor with minimal temperature dependence. The novel microcrack architecture achieves high gauge factor and linearity, crucial for reliable human and robotic monitoring.

Keywords:
conductive polymersflexible electronicsmicrocracksstrain sensorstemperature coefficient of resistance

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Area of Science:

  • Materials Science
  • Sensor Technology
  • Mechanical Engineering

Background:

  • Highly sensitive and stretchable strain sensors are critical for human and robotic applications.
  • Minimizing temperature dependence in strain sensors is a persistent challenge, despite research into near-zero temperature coefficient of resistance (TCR).

Purpose of the Study:

  • To develop a stretchable strain sensor with high sensitivity and minimal temperature dependence.
  • To address the challenge of achieving both high sensitivity and temperature insensitivity in strain sensors.

Main Methods:

  • Fabrication of a stretchable strain sensor using a microcrack architecture.
  • Stacking a brittle, low-resistance material with a stretchable, high-resistance material exhibiting near-zero TCR.
  • Analysis of current pathway redirection due to microcracks.

Main Results:

  • Achieved a high gauge factor of 2.3 × 10^4 and excellent linearity (R^2 = 0.98).
  • Demonstrated temperature insensitivity with absolute TCR below 0.1% K^-1 across 5%-50% strain.
  • Observed only a 7% resistance fluctuation between 25°C and 65°C under 50% cyclic strain.

Conclusions:

  • The proposed microcrack architecture effectively enables highly sensitive and temperature-insensitive stretchable strain sensing.
  • This sensor design offers a promising solution for precise strain monitoring in diverse environmental conditions.
  • The sensor's performance indicates significant advancements for wearable electronics and robotics.