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UID:69df1df9acc0d
DTSTAMP:20260415T011121
DTSTART:20141020T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20141020T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/488354
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:XPS and Morphologic Studies of Ru Nanoparticles Deposited onto High
 ly Oriented Pyrolytic Graphite – Roksana Bavand\, PolyMTL
DESCRIPTION:Roksana Bavand\, Département de génie physique\, École Polyt
 echnique de Montréal\, Montréal\, QC\, Canada. Ru nanoparticles (NPs) w
 ere deposited onto highly oriented pyrolytic graphite and characterized by
  X-ray photoelectron spectroscopy (XPS) and transmission electron microsco
 py (TEM). Each of the several Ru core XPS spectra characterized (3s\, 3p a
 nd 3d) was found to be composed of three symmetric components\; together w
 ith two metal oxide O1s components\, these give evidence of a rather compl
 ex oxide initially formed. The valence band (4d and 5s) spectra clearly de
 monstrate an increase of the Kubo gap\, as well as a 4d→5s electron spil
 l-over\, with decreasing NP size. TEM studies\, as a function of depositio
 n rate\, show that\, with insufficient time for the NP condensation energy
  to dissipate\, the initially well-separated NPs are capable of migrating 
 and aggregating. This indicates substrate bonding that is weaker than expe
 cted.Site web du groupe du Mme BavandCette conférence est présentée pa
 r le RQMP Versant Nord du Département de physique de l'Université de Mo
 ntréal et le Département de génie physique de Polytechnique Montréal.
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