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SUMMARY:Curious Electrostatics in Concentrated Electrolytes - Prof Susan P
 erkin\, University of Oxford
DTSTART:20210608T100000Z
DTEND:20210608T110000Z
UID:TALK159616@talks.cam.ac.uk
CONTACT:David Madden
DESCRIPTION:An electrolyte is a substance containing mobile ions. Electrol
 ytes are within us and surround us at every scale: they mediate molecular 
 processes in all living systems\, they fill the phone batteries in our poc
 kets\, they are the oceans\, even interstellar plasmas.  Despite the enorm
 ous ubiquity and importance of electrolytes\, and after two centuries of s
 tudy\, these most ‘ordinary’ of materials continue to challenge us wit
 h fascinating puzzles. All electrolytes must obey the same fundamental law
 s of electrostatics and statistical mechanics\, yet the lengthscales and e
 nergy of a system can combine in different ways and the result is a multit
 ude of colourful and puzzling phenomena.\n\nIn my laboratory we perform hi
 gh-resolution measurements of the optical and mechanical properties of thi
 n liquid films using a Surface Force Balance (SFB). In this seminar I will
  present some examples of recent experiments with highly concentrated elec
 trolytes and ionic liquids. I will describe several curious observations\,
  including oscillating charge density in electrical double layers\, and an
 omalously long electrostatic screening lengths observed at high salt conce
 ntration.
LOCATION:via zoom - please contact David Madden for the zoom link
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