Self-limited growth of triangular PtO2 nanoclusters on the Pt(111) surface
Citation:
Krasnikov S, Murphy S, Berdunov N, McCoy AP, Radican K, Shvets IV, Self-limited growth of triangular PtO2 nanoclusters on the Pt(111) surface, Nanotechnology, 21, 33, 2010, 335301 -Download Item:
Abstract:
The high temperature oxidation of the Pt(111) surface by molecular oxygen has been studied using scanning tunnelling microscopy (STM) and low-energy electron diffraction (LEED). Results indicate a self-limited growth of well-ordered PtO2 nanoclusters which have an O-Pt-O trilayer structure. Each nanocluster has a triangular shape and nucleates at the Pt(111) surface step edge due to mobility of Pt atoms. The triangular PtO2 nanoislands on the upper and lower Pt(111) terraces represent two mirror domains with the mirror plane perpendicular to the substrate and aligned along the [1-10] direction of the latter. LEED data obtained from the nanostructured PtO2/Pt(111) surface show a characteristic (2?2) pattern.
Different oxidation conditions lead to the formation of chemisorbed oxygen on the Pt(111) surface alongside PtO2 nanoclusters. Oxygen adsorbs on the surface forming variety of structures which result in (3?3), (5?5) and (7?7) LEED patterns.
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Grant Number
Science Foundation Ireland (SFI)
Author's Homepage:
http://people.tcd.ie/ivchvetsDescription:
PUBLISHED
Author: SHVETS, IGOR
Sponsor:
Science Foundation Ireland (SFI)Type of material:
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Series/Report no:
Nanotechnology21
33
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Full text availableKeywords:
Self-limited growth, atomic oxygen, platinum, sites, adsorption, oxide, high coverage structures, co oxidationSubject (TCD):
Nanoscience & MaterialsMetadata
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