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Anomalous high capacitance in a coaxial single nanowire capacitor

Author

Listed:
  • Zheng Liu

    (Rice University)

  • Yongjie Zhan

    (Rice University)

  • Gang Shi

    (Rice University)

  • Simona Moldovan

    (Institut de Physique et Chimie des Matériaux, UMR 7504 CNRS, Université de Strasbourg)

  • Mohamed Gharbi

    (University of Houston)

  • Li Song

    (Research Center for Exotic Nanocarbons, Shinshu University
    National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Lulu Ma

    (Rice University)

  • Wei Gao

    (Rice University)

  • Jiaqi Huang

    (Rice University
    Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Tsinghua University)

  • Robert Vajtai

    (Rice University)

  • Florian Banhart

    (Institut de Physique et Chimie des Matériaux, UMR 7504 CNRS, Université de Strasbourg)

  • Pradeep Sharma

    (University of Houston
    University of Houston)

  • Jun Lou

    (Rice University)

  • Pulickel M. Ajayan

    (Rice University)

Abstract

Building entire multiple-component devices on single nanowires is a promising strategy for miniaturizing electronic applications. Here we demonstrate a single nanowire capacitor with a coaxial asymmetric Cu-Cu2O-C structure, fabricated using a two-step chemical reaction and vapour deposition method. The capacitance measured from a single nanowire device corresponds to ~140 μF cm−2, exceeding previous reported values for metal–insulator–metal micro-capacitors and is more than one order of magnitude higher than what is predicted by classical electrostatics. Quantum mechanical calculations indicate that this unusually high capacitance may be attributed to a negative quantum capacitance of the dielectric–metal interface, enhanced significantly at the nanoscale.

Suggested Citation

  • Zheng Liu & Yongjie Zhan & Gang Shi & Simona Moldovan & Mohamed Gharbi & Li Song & Lulu Ma & Wei Gao & Jiaqi Huang & Robert Vajtai & Florian Banhart & Pradeep Sharma & Jun Lou & Pulickel M. Ajayan, 2012. "Anomalous high capacitance in a coaxial single nanowire capacitor," Nature Communications, Nature, vol. 3(1), pages 1-7, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1833
    DOI: 10.1038/ncomms1833
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