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Week of November 14, 2010

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"Large-area synthesis of high-quality and uniform graphene films on copper foils," by Xuesong Li and 12 others, Science, 324(5932): 1312-4, 5 June 2009.

[Authors' affiliations: University of Texas, Austin; Texas Instruments, Dallas]

Abstract: "Graphene has been attracting great interest because of its distinctive band structure and physical properties. Today, graphene is limited to small sizes because it is produced mostly by exfoliating graphite. We grew large-area graphene films of the order of centimeters on copper substrates by chemical vapor deposition using methane. The films are predominantly single-layer graphene, with a small percentage (less than 5%) of the area having few layers, and are continuous across copper surface steps and grain boundaries. The low solubility of carbon in copper appears to help make this growth process self-limiting. We also developed graphene film transfer processes to arbitrary substrates, and dual-gated field-effect transistors fabricated on silicon/silicon dioxide substrates showed electron mobilities as high as 4050 square centimeters per volt per second at room temperature."

This 2009 report from Science was cited43 times in current journal articles indexed by Clarivate Analytics during July-August 2010. During that two-month period, no other chemistry paper published in the last two years, aside from reviews, collected a higher number of citations. Prior to the most recent bimonthly tally, citations to the paper have accrued as follows:

May-June 2010: 36 citations
March-April 2010: 37

January-February 2010: 19
November-December 2009: 9
September-October 2009: 7
July-August 2009: 2

Total citations to date: 153

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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