Solvent-dependent conductance decay constants in single cluster junctions

Single-molecule conductance measurements have focused primarily on organic molecular systems. Here, we carry out scanning tunneling microscope-based break-junction measurements on a series of metal chalcogenide Co Se clusters capped with conducting ligands of varying lengths. We compare these measur...

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Published inChemical science (Cambridge) Vol. 7; no. 4; pp. 2701 - 2705
Main Authors Choi, Bonnie, Capozzi, Brian, Ahn, Seokhoon, Turkiewicz, Ari, Lovat, Giacomo, Nuckolls, Colin, Steigerwald, Michael L, Venkataraman, Latha, Roy, Xavier
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 21.04.2016
Subjects
Capping
Chalcogenides
Clusters
Conductance
Constants
Decay
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Ligands
Solvents
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Summary:Single-molecule conductance measurements have focused primarily on organic molecular systems. Here, we carry out scanning tunneling microscope-based break-junction measurements on a series of metal chalcogenide Co Se clusters capped with conducting ligands of varying lengths. We compare these measurements with those of individual free ligands and find that the conductance of these clusters and the free ligands have different decay constants with increasing ligand length. We also show, through measurements in two different solvents, 1-bromonaphthalene and 1,2,4-trichlorobenzene, that the conductance decay of the clusters depends on the solvent environment. We discuss several mechanisms to explain our observations.
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USDOE Office of Science (SC), Basic Energy Sciences (BES)
FG02-01ER15264
ISSN:2041-6520
2041-6539
DOI:10.1039/c5sc02595h