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Mechano-switching devices from carbon wire-carbon nanotube junctions

机译：碳线-碳纳米管结的机械开关装置

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摘要

Well-known conductive molecular wires, such as cumulene or polyyne, provide a model for interconnecting molecular electronics circuits. In recent experiments, the appearance of carbon wire bridging between two-dimensional electrodes, i.e., graphene sheets, was observed [C. Jin et al., Phys. Rev. Lett. 102, 205501 (2009)], thus demonstrating a mechanical way of producing cumulene. In this work, we studied the structure and conductance of carbon wire suspended between carbon nanotubes (CNTs) of different chiralities (zigzag and armchair), and corresponding conductance variation upon stretching. We found that the geometric structure of the carbon wire bridging CNTs was similar to the experimentally observed structures in carbon wire obtained between graphene electrodes. We show a way to modulate conductance by changing bridging sites between carbon wire and CNTs without breaking the wire. Observed current modulation via cumulene wire stretching or elongation together with CNT junction stability makes this a promising candidate for use in mechano-switching devices for molecular nanoelectronics.
机译：众所周知的导电分子线，例如异丙苯或聚炔，提供了互连分子电子电路的模型。在最近的实验中，观察到碳线桥接在二维电极即石墨烯片之间的外观[C． Jin等，Phys。牧师102，205501（2009）]，因此证明了生产异丙苯的机械方法。在这项工作中，我们研究了悬挂在不同手性（曲折形和扶手椅形）的碳纳米管（CNT）之间的碳线的结构和电导，以及拉伸时相应的电导变化。我们发现碳线桥接碳纳米管的几何结构与在石墨烯电极之间获得的碳线中的实验观察到的结构相似。我们展示了一种通过改变碳丝和CNT之间的桥接位置而不会折断丝来调节电导的方法。通过对异丙苯电线的拉伸或伸长以及CNT结的稳定性观察到的电流调制使其成为用于分子纳米电子学的机械开关器件的有希望的候选者。

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  • 来源
    《Physical review》 |2013年第15期|155434.1-155434.8|共8页
  • 作者

    J. Prasongkit; A. Grigoriev; R. Ahuja;

  • 作者单位

    Division of Science, Faculty of Liberal Arts and Science, Nakhon Phanom University, Nakhon Phanom, 48000, Thailand Nanotec-KKU Center of Excellence on Advanced Nanomaterials for Energy Production and Storage, 40002 Khon Kaen, Thailand Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden;

    Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden;

    Condensed Matter Theory Group, Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden;

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  • 正文语种 eng
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  • 关键词

    molecular electronic devices; electronic transport in nanoscale materials and structures; decoherence; open systems; quantum statistical methods;

    机译：分子电子器件纳米材料和结构中的电子传输;退相干开放系统;量子统计方法;

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