基于石墨烯电极的寡聚苯乙炔衍生物单分子的单分子电导研究  

Study of Single-Molecule Conductance of Oligo Phenylene Ethylenes Based on Graphene Electrode

作　　者：曾凯 林振超 郑玉玲 陈晓 张彦 Zeng Kai;Lin Zhenchao;Zheng Yuling;Chen Xiao;Zhang Yan(College of Materials Science and Engineering,Minnan University of Science and Technology,Quanzhou,Fujian 362700,China)

机构地区：[1]闽南科技学院材料科学与工程学院,福建泉州362700

出　　处：《湖北工程学院学报》2022年第6期16-21,共6页Journal of Hubei Engineering University

基　　金：国家自然科学基金面上项目(21975212)。

摘　　要：主要阐述了一种构筑石墨烯/分子/石墨烯结的方法。该方法的主要思想是在铜丝上沉积石墨烯后制备具有石墨烯纳米间隙的芯片,再利用目标分子锚定基团与石墨烯间的弱相互作用力“π-π stacking”将分子组装到石墨烯电极上,形成石墨烯/分子/石墨烯结。利用这种构筑分子结的方法,并基于机械可控裂结(MCBJ)技术,测量了3种芘与碳链连接位点不同的寡聚苯乙炔类(OPEs)分子的电导,发现3种分子OPE-2PY-1、OPE-2PY-2和OPE-2PY-3的电导值分别为1.66×10^(-5) G_(0)、2.40×10^(-5) G_(0)和1.23×10^(-5) G_(0)。In this thesis,a method to construct graphene/molecular/graphene junction is reported.The main idea of this method is to build the graphene nanogap between graphene-coated copper wires,and then assemble target molecules into graphene-based electrodes via weak interactions called“π-πstacking”.Based on the method above and MCBJ technique,the conductance of three oligo(phenylene ethylene)s(OPEs)molecules with different pyrene connectivities are measured.The conductance of the molecules OPE-2PY-1,OPE-2PY-2 and OPE-2PY-3 are 1.66×10^(-5)G_(0),2.40×10^(-5)G_(0) and 1.23×10^(-5)G^(0),respectively.

关 键 词：分子电子学 机械可控裂结技术 石墨烯电极 寡聚苯乙炔类分子 

分 类 号：O641.3[理学—物理化学]