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Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors
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Robust Physically Linked Double-Network Ionogel as a Flexible Bimodal Sensor.

Jingxian Sun1, Guoqiang Lu1, Jiulei Zhou1

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China.

ACS Applied Materials & Interfaces
|March 5, 2020
PubMed
Summary

This study developed a robust double-network ionogel (DN ionogel) overcoming the mechanical limitations of traditional ionogels. This advanced ionogel functions as a high-performance strain-temperature sensor for flexible electronics.

Keywords:
bimodal sensordouble networkionogelrobuststrain sensortemperature sensor

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Sensor Technology

Background:

  • Ionogel sensors offer advantages over hydrogel sensors, particularly in overcoming issues of drying and freezing.
  • However, the widespread application of ionogels is limited by their inherently weak mechanical properties.

Purpose of the Study:

  • To fabricate a robust physically linked double-network ionogel (DN ionogel) with enhanced mechanical properties.
  • To evaluate the potential of the developed DN ionogel as a high-performance strain-temperature bimodal sensor for flexible intelligent electronics.

Main Methods:

  • Fabrication of a double-network ionogel by interpenetrating a poly(hydroxyethyl acrylate) network into an agarose network within 1-ethyl-3-methylimidazolium chloride.
  • Characterization of the ionogel's mechanical properties, transparency, temperature tolerance, self-adhesion, and electromechanical performance.

Main Results:

  • The fabricated DN ionogel demonstrated robust mechanical properties, high transparency, extreme temperature tolerance, and excellent self-adhesion.
  • The ionogel exhibited superior electromechanical properties suitable for strain sensing applications, effectively monitoring human activities.
  • The sensor also showed reasonably high sensitivity to temperature variations.

Conclusions:

  • The developed DN ionogel successfully addresses the mechanical limitations of conventional ionogels.
  • The high-performance strain-temperature bimodal sensor shows significant promise for applications in flexible intelligent electronics.