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Nanooptics of molecular-shunted plasmonic nanojunctions

AuthorsBenz, Felix; Tserkezis, C.; Herrmann, Lars O.; Sigle, Daniel O.; Aizpurua, Javier ; Baumberg, Jeremy J.
KeywordsSurface-enhanced Raman spectroscopy
Molecular conductivity
Plasmonic coupling
Issue Date2015
PublisherAmerican Chemical Society
CitationNano Letters 15(1): 669-674 (2015)
AbstractGold nanoparticles are separated above a planar gold film by 1.1 nm thick self-assembled molecular monolayers of different conductivities. Incremental replacement of the nonconductive molecules with a chemically equivalent conductive version differing by only one atom produces a strong 50 nm blue-shift of the coupled plasmon. With modeling this gives a conductance of 0.17G0 per biphenyl-4,4′-dithiol molecule and a total conductance across the plasmonic junction of 30G0. Our approach provides a reliable tool quantifying the number of molecules in each plasmonic hotspot, here <200.
DescriptionThis is an open access article published under a Creative Commons Attribution (CC-BY) License.-- et al.
Publisher version (URL)http://dx.doi.org/10.1021/nl5041786
Identifiersdoi: 10.1021/nl5041786
e-issn: 1530-6992
issn: 1530-6984
Appears in Collections:(CFM) Comunicaciones congresos
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