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  • American Association for the Advancement of Science (AAAS)  (3)
  • American Institute of Physics (AIP)
  • 2005-2009  (3)
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  • 1
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    Electronic confinement and coherence in patterned epitaxial graphene (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-04-15
    Description: Ultrathin epitaxial graphite was grown on single-crystal silicon carbide by vacuum graphitization. The material can be patterned using standard nanolithography methods. The transport properties, which are closely related to those of carbon nanotubes, are dominated by the single epitaxial graphene layer at the silicon carbide interface and reveal the Dirac nature of the charge carriers. Patterned structures show quantum confinement of electrons and phase coherence lengths beyond 1 micrometer at 4 kelvin, with mobilities exceeding 2.5 square meters per volt-second. All-graphene electronically coherent devices and device architectures are envisaged.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Berger, Claire -- Song, Zhimin -- Li, Xuebin -- Wu, Xiaosong -- Brown, Nate -- Naud, Cecile -- Mayou, Didier -- Li, Tianbo -- Hass, Joanna -- Marchenkov, Alexei N -- Conrad, Edward H -- First, Phillip N -- de Heer, Walt A -- New York, N.Y. -- Science. 2006 May 26;312(5777):1191-6. Epub 2006 Apr 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16614173" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Observing the quantization of zero mass carriers in graphene (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-16
    Description: Application of a magnetic field to conductors causes the charge carriers to circulate in cyclotron orbits with quantized energies called Landau levels (LLs). These are equally spaced in normal metals and two-dimensional electron gases. In graphene, however, the charge carrier velocity is independent of their energy (like massless photons). Consequently, the LL energies are not equally spaced and include a characteristic zero-energy state (the n = 0 LL). With the use of scanning tunneling spectroscopy of graphene grown on silicon carbide, we directly observed the discrete, non-equally-spaced energy-level spectrum of LLs, including the hallmark zero-energy state of graphene. We also detected characteristic magneto-oscillations in the tunneling conductance and mapped the electrostatic potential of graphene by measuring spatial variations in the energy of the n = 0 LL.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, David L -- Kubista, Kevin D -- Rutter, Gregory M -- Ruan, Ming -- de Heer, Walt A -- First, Phillip N -- Stroscio, Joseph A -- New York, N.Y. -- Science. 2009 May 15;324(5929):924-7. doi: 10.1126/science.1171810.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19443780" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Liquid carbon, carbon-glass beads, and the crystallization of carbon nanotubes (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-02-12
    Description: The formation of carbon nanotubes in a pure carbon arc in a helium atmosphere is found to involve liquid carbon. Electron microscopy shows a viscous liquid-like amorphous carbon layer covering the surfaces of nanotube-containing millimeter-sized columnar structures from which the cathode deposit is composed. Regularly spaced, submicrometer-sized spherical beads of amorphous carbon are often found on the nanotubes at the surfaces of these columns. Apparently, at the anode, liquid-carbon drops form, which acquire a carbon-glass surface due to rapid evaporative cooling. Nanotubes crystallize inside the supercooled, glass-coated liquid-carbon drops. The carbon-glass layer ultimately coats and beads on the nanotubes near the surface.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Heer, Walt A -- Poncharal, Philippe -- Berger, Claire -- Gezo, Joseph -- Song, Zhimin -- Bettini, Jefferson -- Ugarte, Daniel -- New York, N.Y. -- Science. 2005 Feb 11;307(5711):907-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA. walt.deheer@physics.gatech.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15705847" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
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