Molybdenum disulfide-graphene van der Waals heterostructures as stable and sensitive electrochemical sensing platforms

作     者：Stelbin Peter Figerez Kiran Kumar Tadi Krishna Rani Sahoo Rahul Sharma Ravi K.Biroju Aleena Gigi KAiswarya Anand Golap Kalita Tharangattu N.Narayanan 

作者机构：Tata Institute of Fundamental ResearchHyderabad 500046India Division of Healthcare AdvancementInnovation and ResearchVellore Institute of Technology(VIT)Chennai 600127India Department of Physical Science and EngineeringNagoya Institute of TechnologyNagoya 466‑8555Japan 

出 版 物：《Tungsten》 (钨科技（英文）)

年 卷 期：2020年第2卷第4期

页      面：411-422页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 

基　　金：This work was financially supported by Department of Science and Technology,India extramural research grant(Grant No.EMR/2017/000513) intramural grants at TIFR Hyderabad from the Department of Atomic Energy(DAE) 

主　　题：Graphene Molecular sensing MoS_(2)etching MoS_(2)protection van der Waals structures Electrochemical sensing Ascorbic acid Dopamine 

摘      要：Atomic layers are sought after for molecular sensing due to their available high surface interaction area,and different types of monolayers are attempted for sensing in the recent ***,their chemical stability towards these molecules is questioned in recent times and alternate methods need to be developed to circumvent such issues,while maintaining high ***,the van der Waals(vdWs)stacks of molybdenum disulfide(MoS_(2))and graphene are shown for their stable electrochemical sensing towards ascorbic acid(AA)and dopamine(DA)-two important *** is known to chemically react with MoS_(2) leading to unstable sensing platform,while here the graphene coverage is shown to protect the MoS_(2) even from low-energy plasma exposure while keeping the same high *** proving the graphene-based protection of the sensor,such a sensing platform is shown for its applicability in DA sensing,where it is found to give a linear response in a wide range of concentrations(2.5 to 600μmol·L^(−1))and even selective sensing in the presence of *** a stack is found to be not merely giving protection to the beneath MoS_(2) layer but also the inter-layer charge transfer due to work function differences being beneficial in bringing fast and high sensitivity to the next-generation sensors and point-of-care devices.