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Orbital Mediated Tunneling in a New Unimolecular Rectifier
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| Contributor(s) | Robert Metzger University of Alabama, Tuscaloosa, AL NCN SLC@Northwestern Northwestern University, Evanston |
|---|---|
| Abstract | In 1997 we showed that hexadecylquinolinium tricyanoquinodimethanide is a unimolecular rectifier, by scanning tunneling microscopy and also as a Langmuir-Blodgett (LB) monolayer, sandwiched between Al electrodes. We have now seen rectification in a new molecule: this rectification can be followed both by conventional current-voltage curves and also by second harmonic detection at 4.2 K of a broad signal, at the same bias as at room temperature, because at forward bias the current is transferred elastically from metal electrode to the lowest unoccupied orbital of the molecule. The same spectrum also shows inelastic electron tunneling due to CH2 vibrations (the dominant feature) and a strong zero bias anomaly (ZBA). |
| Biography | Robert Metzger Professor, Department of Chemistry, University of Alabama B.A., 1962, University of California, Los Angeles Ph.D., 1968, California Institute of Technology Postdoctoral Research Associate, 1969-1971, Stanford University. |
| Sponsored by | Northwestern University NCN Student Leadership Council Network for Computational Nanotechnology |
| Cite this work | If you reference this work in a publication, please cite as follows: |
| Date posted | 22 Jun, 2007 |
| Time | May 11, 2007 |
| Location | Northwestern University, Evanston, IL |
| Type | Online Presentations |
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7.4 Ranking Series
Part of: NCN at Northwestern: Student Leadership Council Seminars
NCN at Northwestern: Student Leadership Council Seminars
Type Series Contributor(s) NCN SLC@Northwestern Date 05 Nov, 2006 Avg. Rating (1) Rate this This series is organized by NCN students at Northwestern University. Speakers are invited by the Student Leadership Council to visit Northwestern to interact with students and faculty, and to present a research seminar on their research in Computational Nanotechnology. Significant interaction …
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