Nano Archive

Simultaneous measurements of electronic conduction and Raman response in molecular junctions

Ward, Daniel R. and Halas, Naomi J. and Ciszek, Jacob W. and Tour, James M. and Wu, Yanpeng and Nordiander, Peter and Natelson, Douglas (2008) Simultaneous measurements of electronic conduction and Raman response in molecular junctions. NANO LETTERS, 8 (3). pp. 919-924.

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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 p-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.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nanoelectronics
Material Science > Nanochemistry
Analytical Science > Beam methods
ID Code:2323
Deposited By:Anuj Seth
Deposited On:18 Dec 2008 13:28
Last Modified:19 Jan 2009 15:01

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