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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-Wu3; Santiago-Berrios, Mitk'El B.2; Zheng, Xiao4; Yang, Weitao4; Chan, Garnet K-L.2; Abruna, Hector D.2; Ralph, Daniel C.1,5
2011-06-01
Source PublicationACS NANO
ISSN1936-0851
Volume5Issue:6Pages:5115-5123
AbstractWe 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.
KeywordMolecular Electronics Single Molecule Conductance Photochromism Optoelectronics Electronic Transport. Molecular Switch Dithienylethene
DOI10.1021/nn201199b
Indexed BySCI
Language英语
WOS IDWOS:000292055200101
PublisherAMER CHEMICAL SOC
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72352
Collection中国科学院化学研究所
Corresponding AuthorRalph, Daniel C.
Affiliation1.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
Recommended Citation
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.
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