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Department seminar: “The wonderful world of interfacial water"

Speaker: Prof. Mischa Bonn, Max Planck Institute for Polymer Research, Mainz, Germany. (Host: Tobias Weidner) Department Seminar is mandatory for PhDs; Postdocs and others are encouraged to attend. Coffee and cake 15.00

Oplysninger om arrangementet

Tidspunkt

Torsdag 18. november 2021,  kl. 15:15 - 17:00

Sted

Aud I (1514-213), Institut for Kemi

Prof. Mischa Bonn
Max Planck Institute for Polymer Research, Germany

Abstract:

Water is a substance that needs no introduction: It shapes our blue planet, is life-enabling, and scientifically fascinating with a host of anomalous behaviours. Despite centuries of studies, breakthroughs in the last decade have shown that when water is in contact with an interface, wholly new and unexpected phenomena appear: water flow couples to chemistry, interfacial water has its own phase diagram, and conventional theories break down. This is exciting from a scientific perspective, but also of great technological importance: nanoscale water is central to water purification and desalination, where water has to flow through nanopores, and for energy-related processes, e.g., hydrogen production.

In my presentation, I will discuss some key aspects of interfacial water: its dielectric profile, and how the flow of water affects the chemistry occurring at the interface. The dielectric profile determines how, at an electrochemical electrode, the electrical field decays from the electrode into the aqueous solution. Water flowing along a mineral surface affects the interfacial chemistry and charge in unexpected ways.