Chemically derived graphene quantum dots for high-strain sensing

作     者：Shujun Wang Francesco Lenzini Dechao Chen Philip Tanner Jisheng Han David Thiel Mirko Lobino Qin Li Shujun Wang;Francesco Lenzini;Dechao Chen;Philip Tanner;Jisheng Han;David Thiel;Mirko Lobino;Qin Li

作者机构：Queensland Miro-and Nanotechnology CentreGriffith UniversityNathan CampusBrisbane QLD 4111Australia School of Engineering and Built EnvironmentGriffith UniversityNathan CampusBrisbane QLD 4111Australia Centre for Quantum DynamicsGriffith UniversityNathan CampusBrisbane QLD 4111Australia Department of Industrial EngineeringUniversity of Trento38122Italy 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2023年第141卷第10期

页      面：110-115页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：support of a Griffith Publication Assis-tance Scholarship(PAS).Q.L.wishes to thank the support from Australian Research Council(Nos.DP160104089 IH 180100002 and DP 200101105).D.C.is grateful for the support of a Griffith Univer-sity New Researcher Grant.The authors are grateful for the support of centre of Microscopy and Microanalysis(CMM)at the University of Queensland for acquiring SEM and TEM images.The authors also thank the Queensland Node of Australian National Fabrication Fa-cility(ANFF)for their assistance in fabrication of photomasks 

主　　题：Graphene quantum dots Graphene Strain Sensor Electron tunneling 

摘      要：Graphene quantum dots(GQDs)refer to graphene fragments with a lateral dimension typically less than 100 nm,which possess unique electrical and optical properties due to the quantum confinement *** this study,we demonstrate that chemically derived graphene quantum dots show great potential for making highly stretchable and cost-effective strain sensors via an electron tunneling ***-able strain sensors are critical devices for the field of flexible or wearable electronics which are expected to maintain function up to high strain values(30%).However,strain sensors based on conventional materials(*** or semiconductors)or metal nanoparticles(*** or silver nanoparticles)only work within a small range of strain(*** former have a working range1%and the latter3%).In this study,by simply dropcasting solution-processed GQDs between the interdigitated electrodes on polydimethylsiloxane,we obtained devices that can function in the range from 0.06%to over 50%ten-sile strain with both the sensitivity and working range conveniently adjustable by the concentration of GQDs *** study provides a new concept for practical applications of GQDs,revealing the poten-tial of this material for smart applications such as artificial skin,human-machine interfaces,and health monitoring.