- Title
- Sub-resolution contrast in neutral helium microscopy through facet scattering for quantitative imaging of nanoscale topographies on macroscopic surfaces
- Creator
- Eder, Sabrina D.; Fahy, Adam; Barr, Matthew G.; Manson, J. R.; Holst, Bodil; Dastoor, Paul C.
- Relation
- ARC.DP170103979 http://purl.org/au-research/grants/arc/DP170103979
- Relation
- Nature Communications Vol. 14, Issue 1, no. 904
- Publisher Link
- http://dx.doi.org/10.1038/s41467-023-36578-x
- Publisher
- Nature Publishing Group
- Resource Type
- journal article
- Date
- 2023
- Description
- Nanoscale thin film coatings and surface treatments are ubiquitous across industry, science, and engineering; imbuing specific functional or mechanical properties (such as corrosion resistance, lubricity, catalytic activity and electronic behaviour). Non-destructive nanoscale imaging of thin film coatings across large (ca. centimetre) lateral length scales, crucial to a wide range of modern industry, remains a significant technical challenge. By harnessing the unique nature of the helium atom–surface interaction, neutral helium microscopy images these surfaces without altering the sample under investigation. Since the helium atom scatters exclusively from the outermost electronic corrugation of the sample, the technique is completely surface sensitive. Furthermore, with a cross-section that is orders of magnitude larger than that of electrons, neutrons and photons, the probe particle routinely interacts with features down to the scale of surface defects and small adsorbates (including hydrogen). Here, we highlight the capacity of neutral helium microscopy for sub-resolution contrast using an advanced facet scattering model based on nanoscale features. By replicating the observed scattered helium intensities, we demonstrate that sub-resolution contrast arises from the unique surface scattering of the incident probe. Consequently, it is now possible to extract quantitative information from the helium atom image, including localised ångström-scale variations in topography.
- Subject
- topography; nanoscale; helium microscopy images; helium atom image
- Identifier
- http://hdl.handle.net/1959.13/1481706
- Identifier
- uon:50778
- Identifier
- ISSN:2041-1723
- Rights
- © The Author(s) 2023. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copyof this license, visit http://creativecommons.org/ licenses/by/4.0/.
- Language
- eng
- Full Text
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