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Multiaxially-stretchable kirigami-patterned mesh design for graphene sensor devices

Nano Research 2020年第5期13卷 1406-1412页

作者： Hyo Chan Lee ezekiel yhsieh Keong Yong SungWoo Nam Department of Mechanical Science and Engineering University of Illinois at Urbana–ChampaignUrbanaIllinois 61801USA Department of Materials Science and Engineering University of Illinois at Urbana–ChampaignUrbanaIllinois 61801USA Materials Research Laboratory University of Illinois at Urbana–ChampaignUrbanaIllinois 61801USA Micro and Nanotechnology Laboratory University of Illinois at Urbana–ChampaignUrbanaIllinois 61801USA Carle Illinois College of Medicine University of Illinois at Urbana–ChampaignChampaignIllinois 61820USA

In wearable electronics,significant research has gone into imparting stretchability and flexibility to otherwise rigid electronic components while maintaining their electrical *** far,this has been achieved through various geometric modifications of the rigid conductive components themselves,such as with microcracked,buckled,or planar meander ***,strategic placement of these resulting components within the overall devices,such as embedding them at the neutral plane,has been found to further enhance mechanical stability under ***,these strategies are still limited in performance,failing to achieve fully strain-insensitive electrical performance under biaxial stretching,twisting,and mixed strain ***,we developed a new platform for wearable,motion artifact-free sensors using a graphene-based multiaxially stretchable kirigami-patterned mesh *** normalized resistance change of the electrodes and graphene embedded in the structure is smaller than 0.5%and 0.23%under 180°torsion and 100%biaxial strain,***,the resistance change is limited to 5%under repeated stretching-releasing cycles from 0%to 100%biaxial *** addition,we investigated the deformation mechanisms of the structure with finite element *** on the simulation results,we derived a dimensionless geometric parameter that enables prediction of stretchability of the structure with high ***,as a proof-of-concept,we demonstrated a biaxially-stretchable graphene-based sensor array capable of monitoring of temperature and glucose level with minimized motion-artifacts.

关键词： kirigami mesh strain-insensitive wearable graphene glucose

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