Advanced

Surface morphology of Au-free grown nanowires after native oxide removal.

Hjort, Martin LU ; Knutsson, Johan LU ; Mandl, Bernhard LU ; Deppert, Knut LU ; Lundgren, Edvin LU ; Timm, Rainer LU and Mikkelsen, Anders LU (2015) In Nanoscale 7(22). p.9998-10004
Abstract
Using scanning tunneling microscopy, we evaluate the surface structure and morphology down to the atomic scale for micrometers along Au-free grown InAs nanowires (NWs) free from native oxide. We find that removal of the native oxide (which covers the NWs upon exposure to the ambient air) using atomic hydrogen does not alter the underlying step structure. Imaging with sub-nanometer resolution along the NWs, we find an extremely low tapering (diameter change along the NW) of 1.7 ± 0.5 Åμm(-1). A surface morphology with monolayer high islands, whose shape was influenced by stacking faults, was found to cover the NWs and was attributed to the decomposed native oxide. The appearance of point defects in the form of As-vacancies at the surface is... (More)
Using scanning tunneling microscopy, we evaluate the surface structure and morphology down to the atomic scale for micrometers along Au-free grown InAs nanowires (NWs) free from native oxide. We find that removal of the native oxide (which covers the NWs upon exposure to the ambient air) using atomic hydrogen does not alter the underlying step structure. Imaging with sub-nanometer resolution along the NWs, we find an extremely low tapering (diameter change along the NW) of 1.7 ± 0.5 Åμm(-1). A surface morphology with monolayer high islands, whose shape was influenced by stacking faults, was found to cover the NWs and was attributed to the decomposed native oxide. The appearance of point defects in the form of As-vacancies at the surface is analyzed and we set limits to the amount of carbon impurities in the NWs. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanoscale
volume
7
issue
22
pages
9998 - 10004
publisher
Royal Society of Chemistry
external identifiers
  • pmid:25981415
  • wos:000355560200007
  • scopus:84930349284
ISSN
2040-3372
DOI
10.1039/c5nr01874a
language
English
LU publication?
yes
id
098fe2e5-6105-49ac-999c-6dccb8fa0858 (old id 5453024)
date added to LUP
2015-06-16 16:21:23
date last changed
2017-11-19 03:15:05
@article{098fe2e5-6105-49ac-999c-6dccb8fa0858,
  abstract     = {Using scanning tunneling microscopy, we evaluate the surface structure and morphology down to the atomic scale for micrometers along Au-free grown InAs nanowires (NWs) free from native oxide. We find that removal of the native oxide (which covers the NWs upon exposure to the ambient air) using atomic hydrogen does not alter the underlying step structure. Imaging with sub-nanometer resolution along the NWs, we find an extremely low tapering (diameter change along the NW) of 1.7 ± 0.5 Åμm(-1). A surface morphology with monolayer high islands, whose shape was influenced by stacking faults, was found to cover the NWs and was attributed to the decomposed native oxide. The appearance of point defects in the form of As-vacancies at the surface is analyzed and we set limits to the amount of carbon impurities in the NWs.},
  author       = {Hjort, Martin and Knutsson, Johan and Mandl, Bernhard and Deppert, Knut and Lundgren, Edvin and Timm, Rainer and Mikkelsen, Anders},
  issn         = {2040-3372},
  language     = {eng},
  number       = {22},
  pages        = {9998--10004},
  publisher    = {Royal Society of Chemistry},
  series       = {Nanoscale},
  title        = {Surface morphology of Au-free grown nanowires after native oxide removal.},
  url          = {http://dx.doi.org/10.1039/c5nr01874a},
  volume       = {7},
  year         = {2015},
}