X-ray photoelectron spectra and structure of composites prepared via deposition of Au, Ni, and Au + Ni nanoparticles on SiO 2 from colloidal solutions in triethylamine
作者： A. V. Naumkin , A. Yu. Vasil’kov , I. O. Volkov , V. V. Smirnov , S. A. Nikolaev
DOI: 10.1134/S0020168507040103
关键词: Analytical chemistry 、 Deposition (law) 、 Triethylamine 、 Metal 、 Colloid 、 Chemistry 、 X-ray photoelectron spectroscopy 、 Binding energy 、 Nanoparticle 、 Bimetallic strip
摘要: Monometallic (Au and Ni) bimetallic + nanoparticles deposited on SiO2 from colloidal solutions in triethylamine have been studied by x-ray photoelectron spectroscopy (XPS). The were prepared through vapor-phase metal synthesis. We determined the basic parameters of core-level valence-band XPS spectra Au/SiO2, Ni/SiO2, Au-Ni/SiO2 systems. results indicate that Au these systems is Au(0) state, while Ni oxidized to Ni(II). Au/SiO2 samples differ little shape 4f peak. In system, 2p 3/2-Au 4f 7/2 binding energy difference 0.3 eV larger 3/2 peak narrower than those monometallic samples. effects characteristic system may be due interaction between or interpreted as evidence particles level off potential relief surface.
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