Scanning tunneling microscopy images of ruthenium submonolayers spontaneously deposited on a Pt(111) electrode

Langmuir

Volumn 15, Issue 15, 1999, Pages 4944-4948

  Herrero, E ^a   Feliu, J M ^a   Wieckowski, A ^b  

^a UNIVERSITY OF ALICANTE   (Spain)

^b UNIVERSITY OF ILLINOIS AT URBANA CHAMPAIGN   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CYCLIC VOLTAMMETRY; DEPOSITION; ELECTROCHEMICAL ELECTRODES; METHANOL; MONOLAYERS; NANOSTRUCTURED MATERIALS; OXIDATION; PLATINUM; SCANNING TUNNELING MICROSCOPY;

ELECTROOXIDATION;

RUTHENIUM;

EID: 0344110153     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la990219v     Document Type: Article

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18. The quality of determination of the island heights (see the right-hand side insets in Figures 2-5) was assessed using the grain size option available on the Nanoscope software, version 4.22. The Ru monatomic island border was set at the island height over the Pt(111) terrace of 0.11 nm (0.11 nm corresponds to a half-distance between the Ru layer and Pt(111) surface layer in a closed-packed Ru configuration). This is well above any noise level displayed by the STM system. Therefore, the center of the island gave the expected height of ca. 0.22 nm, which fits well to the theoretical interlayer distance of 0.226 nm. Throughout this study, the 0.22 nm height was used as a marker of the STM piezoelectric device. The atoms at the border of the second layer (see further) were considered to be those that yielded the height of 0.33 nm: the Pt-Ru distance plus half the expected Ru-Ru distance for the second layer.
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