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Title: The high pressure phase transformation behavior of silicon nanowires

Abstract

Si nanowires of 80–150 nm and 200–250 nm diameter are pressurized up to 22 GPa using a diamond anvil cell. Raman and x-ray diffraction data were collected during both compression and decompression. Electron microscopy images reveal that the nanowires retain a nanowire-like morphology (after high pressure treatment). On compression, dc-Si was observed to persist at pressures up to 19 GPa compared to ~11 GPa for bulk-Si. On decompression, the metallic β-Sn phase was found to be more stable for Si nanowires compared with bulk-Si when lowering the pressure and was observed as low as 6 GPa. For the smallest nanowires studied (80–150 nm), predominately a-Si was obtained on decompression, whereas for larger nanowires (200–250 nm), clear evidence for the r8/bc8-Si phase was obtained. We suggest that the small volume of the individual Si nanowires compared with bulk-Si inhibits the nucleation of the r8-Si phase on decompression. This study shows that there is a size dependence in the high pressure behavior of Si nanowires during both compression and decompression.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1]; ORCiD logo [1]
  1. Australian National Univ., Canberra, ACT (Australia). Research School of Physics and Engineering
  2. Vienna Univ. of Technology (Austria). Inst. for Solid State Electronics
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1474160
Grant/Contract Number:  
AC02-06CH11357; FG02-99ER45775; NA0001974; EAR-1606856; EAR-1634415; FG02-94ER14466
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 113; Journal Issue: 12; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; Electron microscopy; Diamond anvil cells; Nanomaterials; Silicon; X-ray diffraction; Nanowires; Raman spectroscopy; Phase transitions

Citation Formats

Huston, L. Q., Lugstein, A., Williams, J. S., and Bradby, J. E. The high pressure phase transformation behavior of silicon nanowires. United States: N. p., 2018. Web. doi:10.1063/1.5048033.
Huston, L. Q., Lugstein, A., Williams, J. S., & Bradby, J. E. The high pressure phase transformation behavior of silicon nanowires. United States. doi:10.1063/1.5048033.
Huston, L. Q., Lugstein, A., Williams, J. S., and Bradby, J. E. Wed . "The high pressure phase transformation behavior of silicon nanowires". United States. doi:10.1063/1.5048033. https://www.osti.gov/servlets/purl/1474160.
@article{osti_1474160,
title = {The high pressure phase transformation behavior of silicon nanowires},
author = {Huston, L. Q. and Lugstein, A. and Williams, J. S. and Bradby, J. E.},
abstractNote = {Si nanowires of 80–150 nm and 200–250 nm diameter are pressurized up to 22 GPa using a diamond anvil cell. Raman and x-ray diffraction data were collected during both compression and decompression. Electron microscopy images reveal that the nanowires retain a nanowire-like morphology (after high pressure treatment). On compression, dc-Si was observed to persist at pressures up to 19 GPa compared to ~11 GPa for bulk-Si. On decompression, the metallic β-Sn phase was found to be more stable for Si nanowires compared with bulk-Si when lowering the pressure and was observed as low as 6 GPa. For the smallest nanowires studied (80–150 nm), predominately a-Si was obtained on decompression, whereas for larger nanowires (200–250 nm), clear evidence for the r8/bc8-Si phase was obtained. We suggest that the small volume of the individual Si nanowires compared with bulk-Si inhibits the nucleation of the r8-Si phase on decompression. This study shows that there is a size dependence in the high pressure behavior of Si nanowires during both compression and decompression.},
doi = {10.1063/1.5048033},
journal = {Applied Physics Letters},
number = 12,
volume = 113,
place = {United States},
year = {2018},
month = {9}
}

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