石墨烯
电极
分子
电子传输链
材料科学
分子振动
密度泛函理论
量子隧道
电子
化学物理
分子物理学
原子物理学
纳米技术
化学
计算化学
光电子学
物理
物理化学
生物化学
量子力学
有机化学
作者
Enrique Burzurí,Joshua O. Island,Raúl Díaz-Torres,Alexandra Fursina,Arántzazu González‐Campo,Olivier Roubeau,Simon J. Teat,Núria Aliaga‐Alcalde,Eliseo Ruiz,Herre S. J. van der Zant
出处
期刊:ACS Nano
[American Chemical Society]
日期:2016-02-05
卷期号:10 (2): 2521-2527
被引量:46
标识
DOI:10.1021/acsnano.5b07382
摘要
Graphene electrodes are promising candidates to improve reproducibility and stability in molecular electronics through new electrode-molecule anchoring strategies. Here we report sequential electron transport in few-layer graphene transistors containing individual curcuminoid-based molecules anchored to the electrodes via pi-pi orbital bonding. We show the coexistence of inelastic co-tunneling excitations with single-electron transport physics owing to an intermediate molecule-electrode coupling; we argue that an intermediate electron-phonon coupling is the origin of these vibrational-assisted excitations. These experimental observations are complemented with density functional theory calculations to model electron transport and the interaction between electrons and vibrational modes of the curcuminoid molecule. We find that the calculated vibrational modes of the molecule are in agreement with the experimentally observed excitations.
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