کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5426193 | 1395881 | 2008 | 7 صفحه PDF | دانلود رایگان |

The growth, morphology and epitaxial relationship of Ag nanostructures deposited onto the c(4Â ÃÂ 2)-NiOx/Pd(1Â 0Â 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(1Â 0Â 0)[0Â 0Â 1]//Pd(1Â 0Â 0)[0Â 0Â 1], while by means of STM we have found that the shape of the islands is typically rectangular with the edges running along the [0Â 1Â 1] directions. According to the reported data, the NiOx ML is locally disrupted in the vicinity of the Ag nanoparticles so that the c(4Â ÃÂ 2)-NiOx/Pd(1Â 0Â 0) surface cannot be considered as an efficient template to stabilize metal nanoparticles against Ostwald ripening phenomena.
Journal: Surface Science - Volume 602, Issue 2, 15 January 2008, Pages 499-505