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CATEGORIES:Physical Chemistry Research Interest Group
SUMMARY:Curious Electrostatics in Concentrated Electrolyte
 s - Prof Susan Perkin\, University of Oxford
DTSTART;TZID=Europe/London:20210608T110000
DTEND;TZID=Europe/London:20210608T120000
UID:TALK159616AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/159616
DESCRIPTION:An electrolyte is a substance containing mobile io
 ns. Electrolytes are within us and surround us at 
 every scale: they mediate molecular processes in a
 ll living systems\, they fill the phone batteries 
 in our pockets\, they are the oceans\, even inters
 tellar plasmas.  Despite the enormous ubiquity and
  importance of electrolytes\, and after two centur
 ies of study\, these most ‘ordinary’ of materials 
 continue to challenge us with fascinating puzzles.
  All electrolytes must obey the same fundamental l
 aws of electrostatics and statistical mechanics\, 
 yet the lengthscales and energy of a system can co
 mbine in different ways and the result is a multit
 ude of colourful and puzzling phenomena.\n\nIn my 
 laboratory we perform high-resolution measurements
  of the optical and mechanical properties of thin 
 liquid films using a Surface Force Balance (SFB). 
 In this seminar I will present some examples of re
 cent experiments with highly concentrated electrol
 ytes and ionic liquids. I will describe several cu
 rious observations\, including oscillating charge 
 density in electrical double layers\, and anomalou
 sly long electrostatic screening lengths observed 
 at high salt concentration.
LOCATION:via zoom - please contact David Madden for the zoo
 m link
CONTACT:David Madden
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