Formation of two-dimensional CuSe on Cu(111) at very low selenium coverage
Abstract
Abstract Using scanning tunneling microscopy (STM), we observed that adsorption of Se on Cu(111) produced islands with a (√3×√3)R30° structure at Se coverages far below the structure's ideal coverage of 1/3 monolayer. On the basis of density functional theory (DFT), these islands cannot form due to attractive interactions between chemisorbed Se atoms. DFT showed that incorporating Cu atoms into the √3‐Se lattice stabilizes the structure, which provided a plausible explanation for the experimental observations. STM revealed three types of √3 textures. We assigned two of these as two‐dimensional layers of strained CuSe, analogous to dense planes of bulk klockmannite (CuSe). Klockmannite has a bulk lattice constant that is 11 % shorter than √3 times the surface lattice constant of Cu(111). This offers a rationale for the differences observed between these textures, for which strain limits the island size or distorts the √3 lattice. STM showed that existing step edges adsorb Se and facet toward ⟨1 1⟩, which is consistent with DFT.
- Authors:
-
- Iowa State Univ., Ames, IA (United States); Surface and Interface Science Lab. RIKEN, Saitama (Japan)
- Ames Lab., Ames, IA (United States)
- Surface and Interface Science Lab. RIKEN, Saitama (Japan)
- Surface and Interface Science Lab. RIKEN, Saitama (Japan); Univ. College London, London (United Kingdom)
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1278748
- Alternate Identifier(s):
- OSTI ID: 1400754
- Report Number(s):
- IS-J-8974
Journal ID: ISSN 1439-4235
- Grant/Contract Number:
- CHE-1507223; AC02-07CH11358; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ChemPhysChem
- Additional Journal Information:
- Journal Volume: 17; Journal Issue: 14; Journal ID: ISSN 1439-4235
- Publisher:
- ChemPubSoc Europe
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Walen, Holly, Liu, Da -Jiang, Oh, Junepyo, Yang, Hyun Jin, Kim, Yousoo, and Thiel, Patricia A. Formation of two-dimensional CuSe on Cu(111) at very low selenium coverage. United States: N. p., 2016.
Web. doi:10.1002/cphc.201600207.
Walen, Holly, Liu, Da -Jiang, Oh, Junepyo, Yang, Hyun Jin, Kim, Yousoo, & Thiel, Patricia A. Formation of two-dimensional CuSe on Cu(111) at very low selenium coverage. United States. https://doi.org/10.1002/cphc.201600207
Walen, Holly, Liu, Da -Jiang, Oh, Junepyo, Yang, Hyun Jin, Kim, Yousoo, and Thiel, Patricia A. Mon .
"Formation of two-dimensional CuSe on Cu(111) at very low selenium coverage". United States. https://doi.org/10.1002/cphc.201600207. https://www.osti.gov/servlets/purl/1278748.
@article{osti_1278748,
title = {Formation of two-dimensional CuSe on Cu(111) at very low selenium coverage},
author = {Walen, Holly and Liu, Da -Jiang and Oh, Junepyo and Yang, Hyun Jin and Kim, Yousoo and Thiel, Patricia A.},
abstractNote = {Abstract Using scanning tunneling microscopy (STM), we observed that adsorption of Se on Cu(111) produced islands with a (√3×√3)R30° structure at Se coverages far below the structure's ideal coverage of 1/3 monolayer. On the basis of density functional theory (DFT), these islands cannot form due to attractive interactions between chemisorbed Se atoms. DFT showed that incorporating Cu atoms into the √3‐Se lattice stabilizes the structure, which provided a plausible explanation for the experimental observations. STM revealed three types of √3 textures. We assigned two of these as two‐dimensional layers of strained CuSe, analogous to dense planes of bulk klockmannite (CuSe). Klockmannite has a bulk lattice constant that is 11 % shorter than √3 times the surface lattice constant of Cu(111). This offers a rationale for the differences observed between these textures, for which strain limits the island size or distorts the √3 lattice. STM showed that existing step edges adsorb Se and facet toward ⟨1 1⟩, which is consistent with DFT.},
doi = {10.1002/cphc.201600207},
journal = {ChemPhysChem},
number = 14,
volume = 17,
place = {United States},
year = {Mon May 09 00:00:00 EDT 2016},
month = {Mon May 09 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
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