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Co-adsorption of Cu and Pb on the Si(1 1 1)–(7 × 7) surface: interface formation

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Title: Co-adsorption of Cu and Pb on the Si(1 1 1)–(7 × 7) surface: interface formation
Authors: Shukrinov, Pavel1 sukrinov@fzu.cz, Mutombo, Pingo1, Cháb, Vladimír1, Prince, K.C.2
Source: Surface Science. Jun2003, Vol. 532-535, p650. 5p.
Subjects: Silicon, Scanning tunneling microscopy
Abstract: The adsorption of Cu and Pb atoms on a Si(1 1 1)–7 × 7 surface was studied by means of scanning tunnelling microscopy (STM). After deposition of ⩽0.1 monolayer (ML) of copper on the Pb √3×√3 mosaic phase and a subsequent annealing up to ∼373 K, new objects of a hexagonal shape appear on a surface. They are scattered over the surface and localised next to the mosaic phase islands. The difference between atomically resolved images of filled and empty states suggests strong covalent bonding within a hexagon. Increasing the concentration of Cu atoms leads to an increasing number of hexagons and their agglomeration. Annealing of this surface at a higher temperature (>470 K) leads to the transformation of these hexagonal-like objects and their agglomeration into the pseudo-“5 × 5” structure, commonly observed for the Cu/Si(1 1 1)system. The absence of hexagons at very low Cu concentration demonstrates the presence of a long-range, attractive interaction among Cu atoms and their strong diffusion just above room temperature (RT). [Copyright &y& Elsevier]
Copyright of Surface Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 9900282
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Co-adsorption of Cu and Pb on the Si(1 1 1)–(7 × 7) surface: interface formation
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  Data: <searchLink fieldCode="JN" term="%22Surface+Science%22">Surface Science</searchLink>. Jun2003, Vol. 532-535, p650. 5p.
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  Label: Abstract
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  Data: The adsorption of Cu and Pb atoms on a Si(1 1 1)–7 × 7 surface was studied by means of scanning tunnelling microscopy (STM). After deposition of ⩽0.1 monolayer (ML) of copper on the Pb <f>√3×√3</f> mosaic phase and a subsequent annealing up to ∼373 K, new objects of a hexagonal shape appear on a surface. They are scattered over the surface and localised next to the mosaic phase islands. The difference between atomically resolved images of filled and empty states suggests strong covalent bonding within a hexagon. Increasing the concentration of Cu atoms leads to an increasing number of hexagons and their agglomeration. Annealing of this surface at a higher temperature (<f>></f>470 K) leads to the transformation of these hexagonal-like objects and their agglomeration into the pseudo-“5 × 5” structure, commonly observed for the Cu/Si(1 1 1)system. The absence of hexagons at very low Cu concentration demonstrates the presence of a long-range, attractive interaction among Cu atoms and their strong diffusion just above room temperature (RT). [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Surface Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/S0039-6028(03)00182-1
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      – Code: eng
        Text: English
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        StartPage: 650
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        Type: general
      – SubjectFull: Scanning tunneling microscopy
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      – TitleFull: Co-adsorption of Cu and Pb on the Si(1 1 1)–(7 × 7) surface: interface formation
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            NameFull: Cháb, Vladimír
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              Text: Jun2003
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