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Single molecule conductance through rigid norbornylogous bridges with zero average curvature
journal contribution
posted on 2008-06-19, 00:00 authored by Wenrong YangWenrong Yang, M Jones, X Li, P Eggers, N Tao, J Gooding, M Paddon-RowA new homologous series of norbornylogous (NB) bridges has been synthesized in which the average curvature of the bridges is very small. The molecules are rigid and have two thiol moieties at each end to allow them to form self-assembled monolayers (SAMs) and to connect to two gold electrodes to form a molecular junction. The SAMs formed were characterized using electrochemistry to determine the surface coverage of molecules on gold surface and to provide an indication of the packing of the NB bridges while ellipsometry and X-ray photoelectron spectroscopy (XPS) were used to provide an indication of the SAM thickness and orientation. Single molecule conductance of NB bridges was measured as a function of the molecular length. The conductance was found to decrease exponentially with the length with a decay constant that is exactly correlated with photoelectron transfer and other studies at the multiple molecule level. The molecule−electrode contact resistance was determined and compared with that of related alkanedithiol molecular junctions.
History
Journal
Journal of physical chemistry Part C : nanomaterials and interfacesVolume
112Issue
24Pagination
9072 - 9080Publisher
American Chemical SocietyLocation
Washington, D.C.Publisher DOI
ISSN
1932-7447eISSN
1932-7455Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2008, American Chemical SocietyUsage metrics
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No categories selectedKeywords
Science & TechnologyPhysical SciencesTechnologyChemistry, PhysicalNanoscience & NanotechnologyMaterials Science, MultidisciplinaryChemistryScience & Technology - Other TopicsMaterials ScienceSELF-ASSEMBLED MONOLAYERSELECTRON-TRANSFER PROCESSESCHARGE SEPARATIONALKANETHIOLATE MONOLAYERSREDUCTIVE DESORPTIONATOMIC-FORCESURFACETRANSPORTDISTANCEAU(111)
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