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Week of October 17, 2010

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"Control of graphane's properties by reversible hydrogenation: Evidence for graphane," by D.C. Elias and 10 others, Science, 323(5914): 610-3, 30 January 2009..

[Authors' affiliations: University of Manchester, U.K.; Institute for Microelectronics Technology, Chernogolovka, Russia; Cambridge University, U.K;  Radboud University Nijmegen, Netherlands]

Abstract: "Although graphite is known as one of the most chemically inert materials, we have found that graphene, a single atomic plane of graphite, can react with atomic hydrogen, which transforms this highly conductive zero-overlap semimetal into an insulator. Transmission electron microscopy reveals that the obtained graphene derivative (graphane) is crystalline and retains the hexagonal lattice, but its period becomes markedly shorter than that of graphene. The reaction with hydrogen is reversible, so that the original metallic state, the lattice spacing, and even the quantum Hall effect can be restored by annealing. Our work illustrates the concept of graphene as a robust atomic-scale scaffold on the basis of which new two-dimensional crystals with designed electronic and other properties can be created by attaching other atoms and molecules."

This 2009 report from Science was cited 35 times in current journal articles indexed by Clarivate Analytics during May-June 2010. By the measure of this latest bimonthly total, the report now ranks as the third-most-cited paper, excluding reviews, published in the last two years in chemistry--although it's also recording numerous citations in newly indexed physics papers. Prior to the most recent two-month count, citations to the paper have accrued as follows:

March-April 2010: 34 citations
January-February 2010: 17
November-December 2009: 32
September-October 2009: 23
July-August 2009: 21
May-June 2009: 11
March-April 2009: 2
January-February 2009: 1

Total citations to date: 176

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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