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"Conductance switching in single
molecules through conformational changes,"
by Z.J. Donhauser and 10 others, Science, 292(5525):2303-7, 22 June
2001.
[Authors' affiliations: Pennsylvania State
University, University Park; Rice University, Houston, TX; Motorola, Tempe,
AZ]
Abstract: "We tracked over time
the conductance switching of single and bundled phenylene ethynylene oligomers
isolated in matrices of alkanethiolate monolayers. The persistence times for
isolated and bundled molecules in either the ON or OFF switch state range from
seconds to tens of hours. When the surrounding matrix is well ordered, the
rate at which the inserted molecules switch is low. Conversely, when the
surrounding matrix is poorly ordered, the inserted molecules switch more
often. We conclude that the switching is a result of conformational changes in
the molecules or bundles, rather than electrostatic effects of charge
transfer."
This 2001 report from Science was
cited 14 times in current journal articles indexed by ISI during
July-August 2002. Only one other non-review paper in chemistry published in
the last two years received a greater number of citations during that
two-month period. Prior to the most recent bimonthly count, citations to the
paper have accrued as follows:
May-June 2002: 6 citations
March-April 2002: 6
January-February 2002: 4
November-December 2001: 1
Total citations to date: 31
SOURCE: Hot
Papers Database (Included with a subscription to the ISI print newsletter Science
Watch®, available from the ISI
Research Services Group. Packaged on a CD-ROM that is mailed with each Science
Watch issue, the Hot
Papers Database contains data on hundreds of highly cited papers published
during the last two years. User interface permits searching by author,
organization, journal, field, and more. Total citations, as well as citations
accrued during successive bimonthly periods, can be assessed and graphed. An
updated CD containing the most recent bimonthly data is mailed with every new
issue of Science
Watch,
six times a year. The CD also includes an electronic version of the Science
Watch
issue in HTML format, for personal desktop access.)
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