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    Strain-activated edge reconstruction of graphene nanoribbons

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    Strain-activated edge reconstruction of graphene nanoribbons.pdf
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    Type
    Article
    Authors
    Cheng, Yingchun cc
    Han, Yu cc
    Schwingenschlögl, Udo cc
    Wang, H. T.
    Zhang, Xixiang cc
    Zhu, Yihan
    Zhu, Zhiyong
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Biological and Environmental Sciences and Engineering (BESE) Division
    Chemical Science Program
    Computational Physics and Materials Science (CPMS)
    Imaging and Characterization Core Lab
    Material Science and Engineering Program
    Nanostructured Functional Materials (NFM) laboratory
    Physical Science and Engineering (PSE) Division
    Date
    2012-02-17
    Permanent link to this record
    http://hdl.handle.net/10754/315773
    
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    Abstract
    The edge structure and width of graphene nanoribbons (GNRs) are crucial factors for the electronic properties. A combination of experiment and first-principles calculations allows us to determine the mechanism of the hexagon-hexagon to pentagon-heptagon transformation. GNRs thinner than 2 nm have been fabricated by bombardment of graphene with high-energetic Au clusters. The edges of the GNRs are modified in situ by electron irradiation. Tensile strain along the edge decreases the transformation energy barrier. Antiferromagnetism and a direct band gap are found for a zigzag GNR, while a fully reconstructed GNR shows an indirect band gap. A GNR reconstructed on only one edge exhibits ferromagnetism. We propose that strain is an effective method to tune the edge and, therefore, the electronic structure of thin GNRs for graphene-based electronics.
    Citation
    Cheng YC, Wang HT, Zhu ZY, Zhu YH, Han Y, et al. (2012) Strain-activated edge reconstruction of graphene nanoribbons. Phys Rev B 85. doi:10.1103/PhysRevB.85.073406.
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review B
    DOI
    10.1103/PhysRevB.85.073406
    Additional Links
    http://link.aps.org/doi/10.1103/PhysRevB.85.073406
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevB.85.073406
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Advanced Membranes and Porous Materials Research Center; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS)

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