Single-Molecule Conductance of Pyridine-Terminated Dithienylethene Switch Molecules

doi:10.1021/nn201199b

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	Single-Molecule Conductance of Pyridine-Terminated Dithienylethene Switch Molecules
	Tam, Eugenia S.1; Parks, Joshua J.1,2; Shum, William W.2; Zhong, Yu-Wu 3; Santiago-Berrios, Mitk'El B.2; Zheng, Xiao 4; Yang, Weitao 4; Chan, Garnet K-L.2; Abruna, Hector D.2; Ralph, Daniel C.1,5
刊名	ACS NANO
	2011-06-01
卷号	5 期号:6 页码:5115-5123
关键词	Molecular Electronics Single Molecule Conductance Photochromism Optoelectronics Electronic Transport. Molecular Switch Dithienylethene
ISSN号	1936-0851
DOI	10.1021/nn201199b
英文摘要	We have investigated the conductance of individual optically switchable dithienylethene molecules in birth their conducting closed configuration and nonconducting open configuration, using the technique of repeatedly formed break-junctions. We employed pyridine groups to link the molecules to gold electrodes in order to achieve relatively well-defined molecular contacts and stable conductance. For the closed form of each molecule, we observed a peak in the conductance histogram constructed without any data selection, allowing us to determine the conductance of the fully stretched molecules. For two different dithlenylethene derivatives, these closed-configuration conductances were (3.3 +/- 0.5) x 10(-5) 60 and (1.5 +/- 0.5) x 10(-6) Go, where 60 is the conductance quantum. For the open configuration of the molecules, the existence of electrical conduction via the molecule was evident in traces of conductance versus junction displacement, but the conductance of the fully stretched molecules was less than the noise floor of our measurement. We can set a lower limit of 30 for the on/off ratio for the simplest dithienylethene derivative we have investigated. Density functional theory calculations predict an on/off ratio consistent with this result.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000292055200101
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/72351]
专题	中国科学院化学研究所
通讯作者	Ralph, Daniel C.
作者单位	1.Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA 2.Cornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14853 USA 3.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China 4.Duke Univ, Dept Chem, Durham, NC 27708 USA 5.Cornell Univ, Kavli Inst Cornell, Ithaca, NY 14853 USA
推荐引用方式 GB/T 7714	Tam, Eugenia S.,Parks, Joshua J.,Shum, William W.,et al. Single-Molecule Conductance of Pyridine-Terminated Dithienylethene Switch Molecules[J]. ACS NANO,2011,5(6):5115-5123.
APA	Tam, Eugenia S..,Parks, Joshua J..,Shum, William W..,Zhong, Yu-Wu.,Santiago-Berrios, Mitk'El B..,...&Ralph, Daniel C..(2011).Single-Molecule Conductance of Pyridine-Terminated Dithienylethene Switch Molecules.ACS NANO,5(6),5115-5123.
MLA	Tam, Eugenia S.,et al."Single-Molecule Conductance of Pyridine-Terminated Dithienylethene Switch Molecules".ACS NANO 5.6(2011):5115-5123.