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Lookup NU author(s): Dr Anders Barlow, Dr Naoko Sano, Dr Billy Murdoch, Dr Jose Portoles, Professor Peter Cumpson
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© 2018 Elsevier B.V. Indium phosphide (InP) surfaces develop a pronounced nanostructured texture upon irradiation by energetic ion beams. We have observed the mechanism of nanostructure evolution of InP under irradiation by an Ar gas cluster ion beam (GCIB) using helium ion microscopy (HIM). Initially, metallic indium nanoparticles form on the surface after removal of the top-most oxide layer. These nanoparticles form a mask which shadows the underlying InP. As the ion dose is increased, the masking effect results in substantial nanostructured topography in the form of pillars or nanocones, oriented along the axis of the incident GCIB. The surface sensitivity and high resolution of the HIM facilitates the direct observation of the metallic indium cap at the top of the pillars.
Author(s): Barlow AJ, Sano N, Murdoch BJ, Portoles JF, Pigram PJ, Cumpson PJ
Publication type: Article
Publication status: Published
Journal: Applied Surface Science
Year: 2018
Volume: 459
Pages: 678-685
Print publication date: 30/11/2018
Online publication date: 30/07/2018
Acceptance date: 28/07/2018
ISSN (print): 0169-4332
ISSN (electronic): 1873-5584
Publisher: Elsevier BV
URL: https://doi.org/10.1016/j.apsusc.2018.07.195
DOI: 10.1016/j.apsusc.2018.07.195
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