Cleaning and tailoring the Pt3Sn(111) surface for surface experiments
(2023) In Surface Science 732.- Abstract
The cleaning process of the bimetallic Pt3Sn(111) surface has been studied by means of low-energy electron microscopy (LEEM), microspot low-energy electron diffraction (μ-LEED), and X-ray photoemission electron microscopy (XPEEM). Different cleaning procedures, performed under ultra-high vacuum conditions (UHV), including sputtering with argon ions and repeated cycles of annealing up to 1500 K were investigated. In this work, we show that a clean Pt3Sn(111) surface of high structural quality with a sharp and brilliant (2 × 2) bulk reconstruction in LEED as well as a perfectly smooth surface with terraces of micron size can be achieved by sputtering, annealing at very high temperatures, followed by a subsequent slow... (More)
The cleaning process of the bimetallic Pt3Sn(111) surface has been studied by means of low-energy electron microscopy (LEEM), microspot low-energy electron diffraction (μ-LEED), and X-ray photoemission electron microscopy (XPEEM). Different cleaning procedures, performed under ultra-high vacuum conditions (UHV), including sputtering with argon ions and repeated cycles of annealing up to 1500 K were investigated. In this work, we show that a clean Pt3Sn(111) surface of high structural quality with a sharp and brilliant (2 × 2) bulk reconstruction in LEED as well as a perfectly smooth surface with terraces of micron size can be achieved by sputtering, annealing at very high temperatures, followed by a subsequent slow (0.09 K/s) and careful cooling procedure. Additionally, we show the possibility of tailoring the Sn concentration in the topmost layers of Pt3Sn(111) as a function of annealing temperature and subsequent cooling rate. Structural changes of the surface are induced by Sn segregation combined with a surface order–disorder transition at 1340 K. Moreover, two new surface reconstructions depending on the cooling rate are reported.
(Less)
- author
- organization
- publishing date
- 2023-06
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Alloy, Cleaning, LEEM, Platinum, PtSn, Tin
- in
- Surface Science
- volume
- 732
- article number
- 122281
- publisher
- Elsevier
- external identifiers
-
- scopus:85150055231
- ISSN
- 0039-6028
- DOI
- 10.1016/j.susc.2023.122281
- language
- English
- LU publication?
- yes
- id
- ff61d719-dd12-4bd7-a3f7-c6947a9bb080
- date added to LUP
- 2023-04-24 11:16:39
- date last changed
- 2023-11-08 05:02:36
@article{ff61d719-dd12-4bd7-a3f7-c6947a9bb080, abstract = {{<p>The cleaning process of the bimetallic Pt<sub>3</sub>Sn(111) surface has been studied by means of low-energy electron microscopy (LEEM), microspot low-energy electron diffraction (μ-LEED), and X-ray photoemission electron microscopy (XPEEM). Different cleaning procedures, performed under ultra-high vacuum conditions (UHV), including sputtering with argon ions and repeated cycles of annealing up to 1500 K were investigated. In this work, we show that a clean Pt<sub>3</sub>Sn(111) surface of high structural quality with a sharp and brilliant (2 × 2) bulk reconstruction in LEED as well as a perfectly smooth surface with terraces of micron size can be achieved by sputtering, annealing at very high temperatures, followed by a subsequent slow (0.09 K/s) and careful cooling procedure. Additionally, we show the possibility of tailoring the Sn concentration in the topmost layers of Pt<sub>3</sub>Sn(111) as a function of annealing temperature and subsequent cooling rate. Structural changes of the surface are induced by Sn segregation combined with a surface order–disorder transition at 1340 K. Moreover, two new surface reconstructions depending on the cooling rate are reported.</p>}}, author = {{Braud, N. and Buß, L. and Lundgren, E. and Merte, L. R. and Wallander, H. and Krisponeit, J. O. and Locatelli, A. and Mentes, T. O. and Jugovac, M. and Flege, J. I. and Falta, J.}}, issn = {{0039-6028}}, keywords = {{Alloy; Cleaning; LEEM; Platinum; PtSn; Tin}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Surface Science}}, title = {{Cleaning and tailoring the Pt<sub>3</sub>Sn(111) surface for surface experiments}}, url = {{http://dx.doi.org/10.1016/j.susc.2023.122281}}, doi = {{10.1016/j.susc.2023.122281}}, volume = {{732}}, year = {{2023}}, }