Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-01-29
Nano Lett. 8, 919-924 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
16 pages, 5 figures + supporting material of 15 pages, 10 figures
Scientific paper
10.1021/nl073346h
Electronic conduction through single molecules is affected by the molecular electronic structure as well as by other information that is extremely difficult to assess, such as bonding geometry and chemical environment. The lack of an independent diagnostic technique has long hampered single-molecule conductance studies. We report simultaneous measurement of the conductance and the Raman spectra of nanoscale junctions used for single-molecule electronic experiments. Blinking and spectral diffusion in the Raman response of both para-mercaptoaniline and a fluorinated oligophenylyne ethynylene correlate in time with changes in the electronic conductance. Finite difference time domain calculations confirm that these correlations do not result from the conductance modifying the Raman enhancement. Therefore, these observations strongly imply that multimodal sensing of individual molecules is possible in these mass-producible nanostructures.
Ciszek Jacob W.
Halas Naomi J.
Natelson Douglas
Nordlander Peter
Tour James M.
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