金属/分子/金属结的电子输运机理与表征  

Mechanism and Characterization of Electron Transport Through Metal/Molecule/Metal Junctions

作　　者：杨扬[1] 刘俊扬[1] 晏润文 吴德印[1] 田中群[1] 

机构地区：[1]固体表面物理化学国家重点实验室 厦门大学化学化工学院化学系,厦门361005

出　　处：《高等学校化学学报》2015年第1期9-23,共15页Chemical Journal of Chinese Universities

基　　金：科技部-国家重大科学仪器设备开发专项项目(批准号:2011YQ030124);国家自然科学基金(批准号:21321062,21373172)资助~~

摘　　要：金属/分子/金属结是分子电子学中的基本单元.根据电子的相位是否发生改变,分子结中的电子输运可以分为相干输运和非相干输运两类.在实验上,分子结的表征方法可以分为电学性质表征和非电学性质表征两类.本文借助能级图,首先对分子结的电子输运机理作了简明解释.在此基础上,结合文献报道和本课题组此前的工作,对分子结的一些常用电学表征方法,包括电流-电压特性曲线、电流-时间曲线、电导统计柱状图、转变电压谱、散粒噪声测试、非弹性电子隧道谱和热电效应法进行了介绍.Although molecular electronics emerged several decades ago, it is still concerning about fundamen- tal issues so far. Metal/molecule/metal junction is a conceptually basic unit in molecular electronics. The mechanism of electron transport through metal/molecule/metal junction has attracted great interest. In general, the mechanisms for electron transport through metal/molecule/metal junctions can be divided into two categories：coherent transport and non-coherent transport according to the phase change of tunneling electrons. In this review, the electron transport mechanism is illustrated briefly by employing energy diagrams. More- over, several extensively measured approaches for studying metal/molecule/metal junctions, including I-V characteristic curve, I-t trace and conductance histogram, transition voltage spectroscopy, shot noise, inelastic electron tunneling spectroscopy, and thermoelectricity are introduced through referring to some recent publica- tions including our works.

关 键 词：分子电子学 金属/分子/金属结 电子输运 自组装 单分子电导 

分 类 号：O641[理学—物理化学]