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DTSTAMP:20260412T215908
DTSTART:20161116T110000
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TRANSP:OPAQUE
DTEND:20161116T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/717384-conference-du-
 professeur-ian-burgess-saskatchewan
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Conférence du Professeur Ian Burgess (Saskatchewan)
DESCRIPTION:Titre:Spatially and Temporally Resolved Infrared Spectroelectro
 chemistry
\nEndroit : Pavillon J.-Armand Bombardier\, salle 1035 à 11 
 hHôte : Dominic Rochefort
\nCette conférence sera prononcée (en anglai
 s) par le Professeur Ian Burgess du Département de chimie de l'Univers
 ité de Saskatchewan.
\nRésumé: Characterization of electrified surfaces
  with infrared (IR) spectroscopy provides valuable information concerning 
 interfacial composition under equilibrium or steady-state conditions. Howe
 ver\, electrochemical reactions often provide concentration gradients that
  evolve in both space and time. Furthermore\, surfaces of electrode materi
 als are often heterogeneous and generate uneven rates of reaction. It is e
 xtremely difficult to study the spatiotemporal characteristics of electrod
 e reactions with conventional IR spectroelectrochemical methods due to lim
 itations in photon throughput. Infrared radiation from non-traditional sou
 rces such as synchrotrons and quantum cascade lasers offer unique brillian
 ce advantages and provide new opportunities to study electrochemical inter
 faces with unprecedented spatial and temporal resolution. This seminar wil
 l illustrate the synchrotron IR advantage in several electrochemical appli
 cations including 1) spectroelectrochemical studies of ultramicroelectrode
 s 2) mapping diffusion layers and 3) combinatorial approaches to electroca
 talyst development. A major methodological breakthrough is also described 
 that allows the measurement of high quality IR spectra of 2.5 femtomoles o
 f molecules confined to a 125 μm2 beam spot. The limit of sensitivity of 
 the method is estimated to be in the region of tens of picomoles and allow
 s\, for the first time\, a means to perform surface sensitive IR spectrosc
 opy of dynamic processes with sub-microsecond time constants. Implications
  for dynamic studies of biological systems such as redox-active proteins w
 ill be discussed.
\nInformation supplémentaireAnnonce PDF de la conféren
 ce
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