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Week of May 30, 2010

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"Chemically derived, ultrasmooth graphene nanoribbon semiconductors," by Xiaolin Li, Xinran Wang, Li Zhang, Sangwon Lee, and Hongjie Dai, Science, 319(5867): 1229-32, 29 February 2008.

[Authors' affiliation: Stanford University, CA]

Abstract: "We developed a chemical route to produce graphene nanoribbons (GNR) with width below 10 nanometers, as well as single ribbons with varying widths along their lengths or containing lattice-defined graphene junctions for potential molecular electronics. The GNRs were solution-phase-derived, stably suspended in solvents with noncovalent polymer functionalization, and exhibited ultrasmooth edges with possibly well-defined zigzag or armchair-edge structures. Electrical transport experiments showed that, unlike single-walled carbon nanotubes, all of the sub-10-nanometer GNRs produced were semiconductors and afforded graphene field effect transistors with on-off ratios of about 10(7) at room temperature."

This 2008 report from Science was cited 41 times in current journal articles indexed by Clarivate Analytics during January-February 2010. Matching its placement after the previous count for November-December 2009, the report remains the second-most-cited chemistry paper published in the last two years, aside from reviews. Prior to the most recent bimonthly tally, citations to the paper have accrued as follows:

November-December 2009: 44 citations
September-October 2009: 38
July-August 2009: 44
May-June 2009: 32
March-April 2009: 31
January-February 2009: 34
November-December 2008: 22
September-October 2008: 14
July-August 2008: 21
May-June 2008: 4

Total citations to date: 325

SOURCE: Hot Papers Database (Included with a subscription to the print newsletter Science Watch®, available from the Research Services Group of Thomson Reuters. Packaged on a CD 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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