Local tunneling barrier height imaging of a reconstructed Pt(100) surface

The effect of surface reconstruction on work function of a quasi-hexagonal reconstructed Pt(100) surface has been studied by local tunneling barrier height (LBH) imaging with scanning tunneling microscopy (STM). Relatively low LBH is observed at the areas providing the strongly-corrugated geometric...

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Bibliographic Details
Published inApplied surface science Vol. 237; no. 1-4; pp. 583 - 588
Main Authors Sinsarp, Asawin, Yamada, Yoichi, Sasaki, Masahiro, Yamamoto, Shigehiko
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.10.2004
Subjects
Local tunneling barrier height
Local work function
Platinum
Reconstructed surface
Scanning tunneling microscopy
68.47.De
Scanning tunneling microscopy
68.35.Bs
Pt
Platinum
Local tunneling barrier height
Local work function
Reconstructed surface
68.37.Ef
73.30.+y
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Summary:The effect of surface reconstruction on work function of a quasi-hexagonal reconstructed Pt(100) surface has been studied by local tunneling barrier height (LBH) imaging with scanning tunneling microscopy (STM). Relatively low LBH is observed at the areas providing the strongly-corrugated geometric structure, where the bright contrast is observed in the STM image. This reduction in the local work function has been interpreted in terms of the dipoles induced by the Smoluchowski smoothing effect. This suggests the reason why the macroscopic work function of the reconstructed Pt(100) surface is lower than that of the Pt(111) surface, despite the similar hexagonal surface structures.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2004.06.091