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  • Crosslinking‐Modulated Hydrogel Piezoionic Senor for Pattern Security Authentication in Human‐Machine Interfaces
  • 来源:杨维清教授个人网站 2025-01-22
  • Ionic hydrogels are uniquely suited as force-sensing layers because of

    their good biocompatibility and controlled electromechanical properties. The

    emerging piezoionic effect allows them to sense the position of pressure, but

    the low response rate limits their applications. Herein, this work focuses on

    modulating the response time of piezoionic outputs through crosslinking. The

    underlying mechanism is investigated through the perspective of deformation

    recovery rate and ion migration behavior in the ionic hydrogels. As a result, the

    developed piezoionic sensors are capable of distinguishing static forces in the

    range of 0.1–5 s while monitoring dynamic force, breaking the limitations of

    conventional self-powered pressure sensors that have trouble tracking static

    forces. Furthermore, by utilizing the piezoionic effect to convert the touch

    indentation into transverse gradient ionic potential, the constructed piezoionic

    sensors achieve accurate monitoring of finger pressing position and sliding

    trajectory. As a proof-of-concept, pattern unlocking in security authentication

    is successfully validated based on the developed piezoionic sensors. This

    design strategy of modulating ionic tactile sensor by crosslinking is expected

    to provide a fresh path for the large-scale flexible human-machine interfaces.

  • [来源:中国聚合物网]
  • 了解更多请进入: 杨维清教授个人网站
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