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A scanning tunnelling microscopy study of C and N adsorption phases on the vicinal Ni(100) surfaces Ni(810) and Ni(911)
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Driver, S. M., Toomes, R. L. and Woodruff, D. P. (2016) A scanning tunnelling microscopy study of C and N adsorption phases on the vicinal Ni(100) surfaces Ni(810) and Ni(911). Surface Science, 646 . pp. 114-125. doi:10.1016/j.susc.2015.06.006
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WRAP_scanning-tunnelling-microscopy-adsorption-vicina-surfaces-Woodruff-2016.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (1187Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.susc.2015.06.006
Abstract
The influence of N and C chemisorption on the morphology and local structure of nominal Ni(810) and Ni(911) surfaces, both vicinal to (100) but with [001] and 011¯ step directions, respectively, has been investigated using scanning tunnelling microscopy (STM) and low energy electron diffraction. Ni(911) undergoes substantial step bunching in the presence of both adsorbates, with the (911)/N surface showing (411) facets, whereas for Ni(810), multiple steps 2–4 layers high are more typical. STM atomic-scale images show the (2×2)pg ‘clock’ reconstruction on the (100) terraces of the (810) surfaces with both C and N, although a second c(2×2) structure, most readily reconciled with a ‘rumpling’ reconstruction, is also seen on Ni(810)/N. On Ni(911), the clock reconstruction is not seen on the (100) terraces with either adsorbate, and these images are typified by protrusions on a (1×1) mesh. This absence of clock reconstruction is attributed to the different constraints imposed on the lateral movements of the surface Ni atoms adjacent to the up-step edge of the terraces with a [011] step direction.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics | ||||||||
| Divisions: | Faculty of Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Adsorption, Surfaces (Physics), Chemisorption, Scanning tunneling microscopy, Nitrogen, Carbon, Nickel | ||||||||
| Journal or Publication Title: | Surface Science | ||||||||
| Publisher: | Elsevier BV | ||||||||
| ISSN: | 0039-6028 | ||||||||
| Official Date: | April 2016 | ||||||||
| Dates: |
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| Volume: | 646 | ||||||||
| Page Range: | pp. 114-125 | ||||||||
| DOI: | 10.1016/j.susc.2015.06.006 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| RIOXX Funder/Project Grant: |
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