IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v9y2018i1d10.1038_s41467-018-07832-4.html
   My bibliography  Save this article

Pressure-driven phase transitions and reduction of dimensionality in 2D silicon nanosheets

Author

Listed:
  • Gil Chan Hwang

    (Yonsei University)

  • Douglas A. Blom

    (University of South Carolina)

  • Thomas Vogt

    (University of South Carolina)

  • Jaejun Lee

    (Yonsei University)

  • Heon-Jin Choi

    (Yonsei University)

  • Sen Shao

    (Jilin University)

  • Yanming Ma

    (Jilin University
    Jilin University)

  • Yongjae Lee

    (Yonsei University
    Center for High Pressure Science and Technology Advanced Research)

Abstract

In-situ high-pressure synchrotron X-ray powder diffraction studies up to 21 GPa of CVD-grown silicon 2D-nanosheets establish that the structural phase transitions depend on size and shape. For sizes between 9.3(7) nm and 15.2(8) nm we observe an irreversible phase transition sequence from I (cubic) → II (tetragonal) → V (hexagonal) during pressure increase and during decompression below 8 GPa the emergence of an X-ray amorphous phase. High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and atomic force microscopy (AFM) images of this X-ray amorphous phase reveal the formation of significant numbers of 1D nanowires with aspect ratios > 10, which are twinned and grow along the direction. We discovered a reduction of dimensionality under pressure from a 2D morphology to a 1D wire in a material with a diamond structure. MD simulations indicate the reduction of thermal conductivity in such nanowires.

Suggested Citation

  • Gil Chan Hwang & Douglas A. Blom & Thomas Vogt & Jaejun Lee & Heon-Jin Choi & Sen Shao & Yanming Ma & Yongjae Lee, 2018. "Pressure-driven phase transitions and reduction of dimensionality in 2D silicon nanosheets," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07832-4
    DOI: 10.1038/s41467-018-07832-4
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-018-07832-4
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-018-07832-4?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Sorb Yesudhas & Valery I. Levitas & Feng Lin & K. K. Pandey & Jesse S. Smith, 2024. "Unusual plastic strain-induced phase transformation phenomena in silicon," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07832-4. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.