X-ray spectroscopy studies on the surface structural characteristics and electronic properties of platinum nanoparticles

The surface structural characteristics and electronic behavior of three platinum nanoparticle (NP) samples prepared with tertiary amine (Pt-TA), primary amine (Pt-PA), and thiol (Pt-SR) molecules were studied using Pt 4f, 5d, and S 2p x-ray photoelectron spectroscopy (XPS), Pt L(3)-edge x-ray absorp...

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Bibliographic Details
Published in:The Journal of chemical physics 2009-12, Vol.131 (24), p.244716-244716
Main Authors: Bayindir, Z, Duchesne, P N, Cook, S C, MacDonald, M A, Zhang, P
Format: Article
Language:English
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Summary:The surface structural characteristics and electronic behavior of three platinum nanoparticle (NP) samples prepared with tertiary amine (Pt-TA), primary amine (Pt-PA), and thiol (Pt-SR) molecules were studied using Pt 4f, 5d, and S 2p x-ray photoelectron spectroscopy (XPS), Pt L(3)-edge x-ray absorption spectroscopy (XAS), and theoretical projected local density of states (l-DOS) calculations. Transmission electron microscopy and XPS composition analysis indicated that the three NPs were all very small (1-2 nm), the NP size decreasing in the order of Pt-TA>Pt-PA approximately Pt-SR. All the three samples showed a positive Pt 4f binding energy (BE) shift relative to that of the bulk, in the order of bulk
ISSN:0021-9606
1089-7690
DOI:10.1063/1.3276917