Nanooptics of Molecular-Shunted Plasmonic Nanojunctions

Gold 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-sh...

Full description

Saved in:
Bibliographic Details
Published inNano letters Vol. 15; no. 1; pp. 669 - 674
Main Authors Benz, Felix, Tserkezis, Christos, Herrmann, Lars O, de Nijs, Bart, Sanders, Alan, Sigle, Daniel O, Pukenas, Laurynas, Evans, Stephen D, Aizpurua, Javier, Baumberg, Jeremy J
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 14.01.2015
Subjects
Conductance
Conductivity
Coupling (molecular)
Equivalence
Gold
Letter
Nanoparticles
Nanostructure
Plasmonics
nanophotonics
plasmonic coupling
Sensing
plasmonics
molecular conductivity
surface-enhanced Raman spectroscopy
Online AccessGet full text

Cover

More Information
Summary:Gold 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 0.17G 0 per biphenyl-4,4′-dithiol molecule and a total conductance across the plasmonic junction of 30G 0. Our approach provides a reliable tool quantifying the number of molecules in each plasmonic hotspot, here <200.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1530-6984
1530-6992
DOI:10.1021/nl5041786