Piezo-Ionic Electronic Skin Based on Visco-Poroelastic Behaviorfor Mechanical Selective Sensitivity
발표자
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초록
내용
With the development of soft electronics, many studies on electronic skins (E-skins) have tried to emulate sensing capabilities of human skin including various mechanical stimuli such as pressure, strain, and torsion. However, previous reports still suffer from the ability to distinguish and recognize two or more mechanical stimuli including pressure, strain, and torsion. To overcome this limitation, we describe piezo-ionic E-skin recognizing two mechanical stimuli such as pressure, strain using visco-poroelastic behavior of ion gel. The visco-poroelastic behavior of ion gel have not only the viscoelastic behavior by the polymer matrix deformation, but also the poroelastic behavior due to diffusion of the ions inside the polymer matrix. As a result, our piezo-ionic E-skin based on ion gel is capacitive mechanical sensors of vertical and lateral structure. These can distinguish pressure and strain when the direction of ion movement is identical with the mechanical stimuli.