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SUMMARY:Monitoring potential-dependent adsorbate behaviour at solid/liquid
  interfaces with EC-TERS
DTSTART:20170515T131500
DTEND:20170515T141500
DTSTAMP:20260407T011334Z
UID:4fd07e7101a708408446f00def8daa1538bc11a500370a22df404a30
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Katrin Domke\, Max Planck Institute for Polymer Research\, 
 Germany\nOne crucial parameter that determines surface reactivity or devic
 e functionality in a large variety of applications\, such as heterogeneous
  catalysis\, electrochemical energy conversion schemes\, biotechnology or 
 molecular electronics\, is the adsorption geometry of the (re)active molec
 ules. Accessing adsorbate orientation in relation to specific surface site
 s in situ or in operando is a first crucial step toward controlling interf
 acial geometries for improved device architecture. However\, suitable in-s
 itu techniques to study molecular orientation at well- defined adsorption 
 sites are still scarce. In my talk\, I will present a novel electrochemica
 l nearfield Raman spectroscopy (EC-TERS) tool that enables to access the v
 ibrational fingerprint of less than 100 small\, non-resonant molecules ads
 orbed at a potential-controlled Au surface. From the spectral changes obse
 rved as a function of potential\, the conformational and chemical changes 
 of showcase DNA base adenine in terms of adsorption and reorientation foll
 owing molecular (de)protonation can be deduced by combining experimental a
 nd theoretical simulation data. This unique addition to nanoscale spectros
 copy of electrified solid/liquid interfaces holds great potential to acces
 s molecular-scale chemistry in situ\, for example to unravel electrocataly
 tic conversion mechanisms or biophysical processes on the single-protein l
 evel.\n\nBio: Katrin F. Domke studied chemistry at the Universities of Bon
 n\, Alicante and CSIC/Sevilla and received her PhD in 2006 from the Free U
 niversity Berlin / Fritz Haber Institute of the Max Planck Society for her
  seminal TERS work. After postdoctoral studies as a Feodor Lynen Fellow at
  Bern University and FOM Institute AMOLF in Amsterdam\, in 2012 she set up
  an independent Emmy Noether Group at the Max Planck Institute for Polymer
  Research in Mainz. Katrin’s research interests evolve around ad- vanced
  molecular spectroscopy of electrified solid/liquid interfaces important f
 or energy and catalytic conversion processes.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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