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Wearable multifunctional printed graphene sensors

npj Flexible Electronics 2019年第1期3卷 132-141页

作者： Altynay Kaidarova Mohammed Asadullah Khan Marco Marengo Liam Swanepoel Alexander Przybysz Cobus Muller andreas fahlman Ulrich Buttner Nathan R.Geraldi Rory P.Wilson Carlos M.Duarte Jurgen Kosel Computer Electrical and Mathematical Sciences&Engineering(CEMSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955Saudi Arabia Mechanical Engineering 7600 Stellenbosch UniversityStellenboschSouth Africa Carrer d’Eduardo Primo Yúfera 146013 ValenciaSpain Red Sea Research Center(RSRC)and Computational Biosciences Research Center King Abdullah University of Science and Technology(KAUST)Kingdom of Saudi ArabiaThuwal 23955Saudi Arabia Swansea Lab for Animal Movement BiosciencesSwansea UniversitySwansea SA28PP WalesUK

The outstanding properties of graphene have initiated myriads of research and development;yet, its economic impact is hamperedby the difficulties encountered in production and practical application. Recently discovered laser-induced graphene is generated bya simple printing process on flexible and lightweight polyimide films. Exploiting the electrical features and mechanical pliability ofLIG on polyimide, we developed wearable resistive bending sensors that pave the way for many cost-effective measurementsystems. The versatile sensors we describe can be utilized in a wide range of configurations, including measurement of force,deflection, and curvature. The deflection induced by different forces and speeds is effectively sensed through a resistancemeasurement, exploiting the piezoresistance of the printed graphene electrodes. The LIG sensors possess an outstanding range forstrain measurements reaching >10% A double-sided electrode concept was developed by printing the same electrodes on bothsides of the film and employing difference measurements. This provided a large bidirectional bending response combined withtemperature compensation. Versatility in geometry and a simple fabrication process enable the detection of a wide range of flowspeeds, forces, and deflections. The sensor response can be easily tuned by geometrical parameters of the bending sensors and theLIG electrodes. As a wearable device, LIG bending sensors were used for tracking body movements. For underwater operation,PDMS-coated LIG bending sensors were integrated with ultra-low power aquatic tags and utilized in underwater animal speedmonitoring applications, and a recording of the surface current velocity on a coral reef in the Red Sea.

关键词： underwater printing utilized

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