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- W2081632388 abstract "Infrared reflection absorption spectroscopy (IRRAS) and temperature programmed desorption (TPD) were used to investigate carbon monoxide (CO) adsorption on 0.25-1.0 monolayer (ML)-thick Fe deposited Pt(100) (Fex(x=0.25-1.0ML)/Pt(100)). The cleaned Pt(100) surface shows 5 × 20 reconstruction (Pt(100)-hex). The 1.0-L-CO exposure to the Pt(100)-hex at 300 K yields linearly bonded CO-Pt bands at 2089 and 2081 cm-1. They are ascribable respectively to adsorbed CO on 1 × 1 and hex domains. Low-energy electron diffraction (LEED) patterns for the 343-K-deposited Fex/Pt(100) change from blurred hex (0.25 ML) to 1 × 1 (>0.5 ML), indicating that the outermost surface structures changed through Fe thickness. Regarding the Fe0.25ML/Pt(100), two bands are located at 2082 and 2069 cm-1 for the 1.0-L-CO exposed surface. The Fe0.5ML/Pt(100), however, reveals a single absorption band at 2050 cm-1. The CO exposure to the Fe1.0ML/Pt(100) generates a broad and more red-shifted band at 2027 cm-1. In contrast, the LEED pattern for Fe0.5ML/Pt(100) fabricated at 873 K shows hex reconstruction. The IRRAS spectrum recorded after 1.0-L-CO exposure for the 873 K deposited Fe0.5ML/Pt(100) shows an absorption band at 2073 cm-1 with narrow bandwidth. The CO desorption temperature for the Pt(100)-hex (about 520 K) was shifted to a lower temperature by Fe deposition: the temperatures are about 470 and 430 K for the Fe0.5ML/Pt(100) fabricated substrate temperatures of 343 and 873 K. Based on IRRAS and TPD results, CO adsorption behavior on the Fex/Pt(100) is discussed. [DOI: 10.1380/ejssnt.2009.245]" @default.
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- W2081632388 date "2009-01-01" @default.
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- W2081632388 title "IRRAS and TPD Investigations of Carbon Monoxide Adsorption on MBE grown Fe on Pt(100)" @default.
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- W2081632388 doi "https://doi.org/10.1380/ejssnt.2009.245" @default.
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