کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5368945 1388414 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Binding energy shift in photoemission spectroscopy study of Ni clusters deposited on rutile TiO2 surfaces
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Binding energy shift in photoemission spectroscopy study of Ni clusters deposited on rutile TiO2 surfaces
چکیده انگلیسی

Cluster-size-dependent binding energy (BE) shifts of Ni 2p3/2 spectra in Ni clusters with respect to bulk Ni metal have been studied as a function of Ni coverage on clean rutile TiO2(0 0 1) surfaces at room temperature. Auger parameter (AP) analysis of photoelectron spectra has been employed and revealed an obvious initial state contribution at the coverage of 0.5 monolayers (ML). The initial state effect was demonstrated to be strongly affected by the substrate and was assigned to a combination of eigenvalue shift in surface core-level shift (SCLS) and charge transfer between the metal clusters and substrates. The TiO2(0 0 1) surface stoichiometry was found to introduce different charge transfer behaviors. Our results experimentally present that the Ni clusters are charged positively on stoichiomtric TiO2 surface and less positively or even negatively on various reduced surfaces.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 256, Issue 4, 30 November 2009, Pages 1088-1091
نویسندگان
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