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Related Experiment Video

Updated: Mar 10, 2026

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Flexible Pressure Sensor with Ag Wrinkled Electrodes Based on PDMS Substrate.

Jianli Cui1, Binzhen Zhang2, Junping Duan3

  • 1Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China. zhaorui@nuc.edu.cn.

Sensors (Basel, Switzerland)
|December 17, 2016
PubMed
Summary

Researchers developed a new capacitive flexible pressure sensor using silver wrinkled electrodes and a carbon nanotubes/polydimethylsiloxane dielectric layer. This electronic skin sensor offers high sensitivity and durability for healthcare and robotics.

Keywords:
Ag wrinkled electrodescarbon nanotubeflexible sensorpressure sensor

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Sensor Technology

Background:

  • Flexible pressure sensors are crucial for advanced applications like electronic skins, impacting healthcare, robotics, and prosthetics.
  • Existing sensors often face limitations in sensitivity, durability, or response time, hindering widespread adoption.
  • Developing novel materials and structures is key to overcoming these challenges.

Purpose of the Study:

  • To engineer and characterize a novel capacitive flexible pressure sensor with enhanced performance.
  • To investigate the fabrication process of silver wrinkled electrodes and CNTs/PDMS dielectric layers.
  • To evaluate the sensor's sensitivity, durability, and response time for practical applications.

Main Methods:

  • Fabrication of silver wrinkled electrodes via vacuum deposition on plasma-treated, pre-strained PDMS substrates.
  • Creation of a composite dielectric layer using carbon nanotubes (CNTs) and polydimethylsiloxane (PDMS).
  • Characterization of sensor performance, including sensitivity, durability (over 500 cycles), and mechanical response time (<200 ms).

Main Results:

  • The developed capacitive sensor achieved a maximum sensitivity of 19.80% kPa-1.
  • Demonstrated excellent durability with over 500 cycles of operation without significant performance degradation.
  • Exhibited rapid mechanical response times, crucial for real-time monitoring applications.
  • Successfully detected the location and distribution of finger pressure, showcasing its practical utility.

Conclusions:

  • The novel flexible pressure sensor demonstrates high sensitivity, durability, and rapid response, making it suitable for electronic skin applications.
  • The fabrication method offers a viable route to producing advanced sensors for human healthcare monitoring, biomedical diagnostics, and robotics.
  • This work contributes to the advancement of flexible electronics and wearable sensor technology.