Unexpected current–voltage characteristics of mechanically modulated atomic contacts with the presence of molecular junctions in an electrochemically assisted–MCBJ

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• 作者：Yang Yang ; Junyang Liu ; Shi Feng ; Huimin Wen ; Jinghua Tian ; Jueting Zheng…
• 关键词：molecular junction ; electrochemical deposition ; mechanically controllable break junction (MCBJ) ; ruthenium complex ; ferrocenyl molecular wire
• 刊名：Nano Research
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：9
• 期：2
• 页码：560-570
• 全文大小：2,800 KB
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• 作者单位：Yang Yang (1)
  Junyang Liu (1)
  Shi Feng (1)
  Huimin Wen (2)
  Jinghua Tian (1)
  Jueting Zheng (1)
  Bernd Schöllhorn (3)
  Christian Amatore (3)
  Zhongning Chen (2)
  Zhongqun Tian (1)
  
  1. Department of Chemistry/Pen-Tung Sah Institute of Micro-Nano Science and Technology, State Key Laboratory of Physical Chemistry of Solid Surfaces and LIA CNRS NanoBioCatEchem, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, 361005, China
  2. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
  3. CNRS UMR 8640 PASTEUR and LIA CNRS NanoBioCatEchem, Ecole Normale Supérieure-PSL Research University, Département de Chimie, Sorbonne Universités–UPMC Paris 6, 24, rue Lhomond, 75005, Paris, France
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chinese Library of Science
  Chemistry
  Nanotechnology
  
• 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
• ISSN：1998-0000

文摘

In this article, we report on the characterization of various molecular junctions’ current–voltage characteristics (I–V curves) evolution under mechanical modulations, by employing a novel electrochemically assisted-mechanically controllable break junction (EC-MCBJ) method. For 1,4-benzenedithiol, the I–V curves measured at constant electrode pair separation show excellent reproducibility, indicating the feasibility of our EC-MCBJ method for fabricating molecular junctions. For ferrocene-bisvinylphenylmethyl dithiol (Fc-VPM), an anomalous type of I–V curve was observed by the particular control over the stepping motor. This phenomenon is rationalized assuming a model of atomic contact evolution with the presence of molecular junctions. To test this hypothesized model, a molecule with a longer length, 1,3-butadiyne-linked dinuclear ruthenium(II) complex (Ru-1), was implemented, and the I–V curve evolution was investigated under similar circumstances. Compared with Fc-VPM, the observed I–V curves show close analogy and minor differences, and both of them fit the hypothesized model well.