Journal article
Encapsulated Pd crystals on anatase supports: high precision determination of the titanate overlayer moiré structure
- Abstract:
- Palladium (Pd) crystal islands, with 100–200 nm wide (111) top facets, were grown in ultrahigh vacuum (UHV) on an anatase (001) film supported on a SrTiO3(001) substrate. Annealing the crystals at > 600 °C causes encapsulation by a TiOx monolayer due to the strong metal–support interaction (SMSI). Scanning tunneling microscopy (STM) reveals that the TiOx monolayer on the Pd(111) facets consists of two periodicities: one is a hexagonal (4 × 4)R1.5° structure, and the other is a larger-scale periodicity consisting of a two-fold symmetric pattern of dark regions that can be described by a (4√39 × 4√61)R42.4° superstructure. This double-periodicity structure requires a formation area of at least 100s of nm2. An atomic model is developed that encompasses all features of the moiré superstructure.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
-
-
(Preview, Accepted manuscript, pdf, 803.0KB, Terms of use)
-
- Publisher copy:
- 10.1016/j.susc.2021.121941
Authors
- Publisher:
- Elsevier
- Journal:
- Surface Science More from this journal
- Volume:
- 715
- Article number:
- 121941
- Publication date:
- 2021-09-20
- Acceptance date:
- 2021-09-08
- DOI:
- EISSN:
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1879-2758
- ISSN:
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0039-6028
- Language:
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English
- Keywords:
- Pubs id:
-
1200120
- Local pid:
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pubs:1200120
- Deposit date:
-
2021-11-09
Terms of use
- Copyright holder:
- Elsevier B.V.
- Copyright date:
- 2021
- Rights statement:
- © 2021 Elsevier B.V. All rights reserved.
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from Elsevier at: https://doi.org/10.1016/j.susc.2021.121941
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