Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
Conductance Switching in Single Molecules Through Conformational Changes
Z. J. Donhauser,1B. A. Mantooth,1K. F. Kelly,1L. A. Bumm,1J. D. Monnell,1J. J. Stapleton,1D.
W. Price Jr.,2A. M. Rawlett,2*D.
L. Allara,1J. M. Tour,2P. S. Weiss1
We tracked over time the conductance switching of single
and bundled phenylene ethynylene oligomers isolated in matrices ofalkanethiolate monolayers. The persistence times for isolatedand
bundled molecules in either the ON or OFF switch state rangefrom
seconds to tens of hours. When the surrounding matrix iswell ordered,
the rate at which the inserted molecules switchis low. Conversely,
when the surrounding matrix is poorly ordered,the inserted molecules
switch more often. We conclude that theswitching is a result of
conformational changes in the moleculesor bundles, rather than
electrostatic effects of charge transfer.
1 Department of Chemistry, The Pennsylvania State
University, University Park, PA 16802-6300, USA.
2 Department of Chemistry and Center for Nanoscale Science
and Technology, Rice University, Houston, TX 77005, USA.
*
Present address: Motorola, 7700 South River Parkway, Tempe, AZ 85248, USA.
To whom correspondence should be addressed. E-mail:
dla3{at}psu.edu (D.L.A.); tour{at}rice.edu (J.M.T.); stm{at}psu.edu
(P.S.W.)
The editors suggest the following Related Resources on Science sites:
In Science Magazine
LETTERS
James R. Heath, J. Fraser Stoddart, R. Stanley Williams;, Edwin A. Chandross;, Paul S. Weiss;, and Robert Servic (20 February 2004) Science303 (5661), 1136c.
[DOI: 10.1126/science.303.5661.1136c] |Full Text »|PDF »
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
A hybrid nanomemristor/transistor logic circuit capable of self-programming.
J. Borghetti, Z. Li, J. Straznicky, X. Li, D. A. A. Ohlberg, W. Wu, D. R. Stewart, and R. S. Williams (2009)
PNAS
106, 1699-1703
|Abstract »|Full Text »|PDF »
The study of charge transport through organic thin films: mechanism, tools and applications.
E. A Weiss, J. K Kriebel, M.-A. Rampi, and G. M Whitesides (2007)
Phil Trans R Soc A
365, 1509-1537
|Abstract »|Full Text »|PDF »
An Atomic Seesaw Switch Formed by Tilted Asymmetric Sn-Ge Dimers on a Ge (001) Surface.
K. Tomatsu, K. Nakatsuji, T. Iimori, Y. Takagi, H. Kusuhara, A. Ishii, and F. Komori (2007)
Science
315, 1696-1698
|Abstract »|Full Text »|PDF »
Realization of a four-step molecular switch in scanning tunneling microscope manipulation of single chlorophyll-a molecules.
Molecular Electronics Special Feature: Probing charge transport at the single-molecule level on silicon by using cryogenic ultra-high vacuum scanning tunneling microscopy.
A Bond-Fluctuation Mechanism for Stochastic Switching in Wired Molecules.
G. K. Ramachandran, T. J. Hopson, A. M. Rawlett, L. A. Nagahara, A. Primak, and S. M. Lindsay (2003)
Science
300, 1413-1416
|Abstract »|Full Text »|PDF »
Distributed response analysis of conductive behavior in single molecules.
M. in het Panhuis, R. W. Munn, P. L. A. Popelier, J. N. Coleman, B. Foley, and W. J. Blau (2002)
PNAS
99, 6514-6517
|Abstract »|Full Text »|PDF »
Organic Molecules Acting as Templates on Metal Surfaces.
F. Rosei, M. Schunack, P. Jiang, A. Gourdon, E. Lagsgaard, I. Stensgaard, C. Joachim, and F. Besenbacher (2002)
Science
296, 328-331
|Abstract »|Full Text »|PDF »
Field-Effect Modulation of the Conductance of Single Molecules.
