کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5426193 1395881 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Silver nanostructures on a c(4 Ã— 2)-NiOx/Pd(1 0 0) monolayer
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Silver nanostructures on a c(4 Ã— 2)-NiOx/Pd(1 0 0) monolayer
چکیده انگلیسی

The growth, morphology and epitaxial relationship of Ag nanostructures deposited onto the c(4 × 2)-NiOx/Pd(1 0 0) surface have been investigated by photoemission (both core and valence levels), scanning tunneling microscopy and angle-scanned photoelectron diffraction. Small Ag nanoparticles are obtained on the terraces, whereas the tendency of Ag to decorate the step edges can lead to the formation of extended nanowire-like features. The Ag nanoparticles adopt a fcc structure epitaxially related to the substrate according to the following relationship: Ag(1 0 0)[0 0 1]//Pd(1 0 0)[0 0 1], while by means of STM we have found that the shape of the islands is typically rectangular with the edges running along the [0 1 1] directions. According to the reported data, the NiOx ML is locally disrupted in the vicinity of the Ag nanoparticles so that the c(4 × 2)-NiOx/Pd(1 0 0) surface cannot be considered as an efficient template to stabilize metal nanoparticles against Ostwald ripening phenomena.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 602, Issue 2, 15 January 2008, Pages 499-505
نویسندگان
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