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    Sub-Nanometer Channels Embedded in Two-Dimensional Materials

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    1707.09880.pdf
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    3.268Mb
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    PDF
    Description:
    Preprint
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    Type
    Preprint
    Authors
    Han, Yimo
    Li, Ming-yang cc
    Jung, Gang-Seob
    Marsalis, Mark A.
    Qin, Zhao
    Buehler, Markus J.
    Li, Lain-Jong cc
    Muller, David A. cc
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2017-07-31
    Permanent link to this record
    http://hdl.handle.net/10754/626555
    
    Metadata
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    Abstract
    Two-dimensional (2D) materials are among the most promising candidates for next-generation electronics due to their atomic thinness, allowing for flexible transparent electronics and ultimate length scaling1. Thus far, atomically-thin p-n junctions2-7, metal-semiconductor contacts8-10, and metal-insulator barriers11-13 have been demonstrated. While 2D materials achieve the thinnest possible devices, precise nanoscale control over the lateral dimensions are also necessary. Although external one-dimensional (1D) carbon nanotubes14 can be used to locally gate 2D materials, this adds a non-trivial third dimension, complicating device integration and flexibility. Here, we report the direct synthesis of sub-nanometer 1D MoS2 channels embedded within WSe2 monolayers, using a dislocation-catalyzed approach. The 1D channels have edges free of misfit dislocations and dangling bonds, forming a coherent interface with the embedding 2D matrix. Periodic dislocation arrays produce 2D superlattices of coherent MoS2 1D channels in WSe2. Molecular dynamics (MD) simulations have identified other combinations of 2D materials that could form 1D channels. Density function theory (DFT) calculation predicts these 1D channels display type II band alignment needed for carrier confinement and charge separation to access the ultimate length scales necessary for future electronic applications.
    Publisher
    arXiv
    arXiv
    1707.09880
    Additional Links
    http://arxiv.org/abs/1707.09880v1
    http://arxiv.org/pdf/1707.09880v1
    Collections
    Preprints; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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