Issue 22, 2015

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

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 Å μm−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.

Graphical abstract: Surface morphology of Au-free grown nanowires after native oxide removal

Supplementary files

Article information

Article type
Communication
Submitted
24 Mar 2015
Accepted
29 Apr 2015
First published
01 May 2015

Nanoscale, 2015,7, 9998-10004

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

M. Hjort, J. V. Knutsson, B. Mandl, K. Deppert, E. Lundgren, R. Timm and A. Mikkelsen, Nanoscale, 2015, 7, 9998 DOI: 10.1039/C5NR01874A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements