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UID:DSC-22800
DTSTART;TZID=Europe/Berlin:20260429T140000
SEQUENCE:1777441132
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DTEND;TZID=Europe/Berlin:20260429T153000
URL:https://www.dresden-science-calendar.de/calendar/de/detail/22800
LOCATION:HZDR\, Bautzner Landstraße 40001328 Dresden
SUMMARY:Bonn: Molecular mechanics of aqueous interfaces from surface vibrat
 ional spectroscopy
CLASS:PUBLIC
DESCRIPTION:Speaker: Prof. Mischa Bonn\nInstitute of Speaker: Max Planck In
 stitute for Polymer Research\, Mainz\, Germany\nTopics:\n\n Location:\n  N
 ame: HZDR (CASUS)\n  Street: Bautzner Landstraße 400\n  City: 01328 Dresd
 en\n  Phone: \n  Fax: \nDescription: Understanding how water\, ions\, and 
 surfaces interact across length scales is central to electrochemistry\, na
 nofluidics\, and catalysis. In particular\, the impact of hydrogen-bond ne
 twork termination and interfacial charges on the arrangement of counterion
 s and water has been the subject of intense debate. Across three studies\,
  Mischa and his team have established a molecular-level picture of structu
 re and dynamics at aqueous interfaces under confinement and electrostatic 
 perturbation.  They demonstrated that\, down to the angstrom-scale confine
 ment\, interfacial effects entirely determine the organization of confined
  water\, disrupting bulk-like hydrogen bonding and producing asymmetric en
 vironments due to wall contact [Nature Commun. 16\, 7288 (2025)]. These fi
 ndings establish that nanofluidic behavior is governed not by the confined
  volume\, but by its bounding interfaces. They extended this picture to sh
 ow that even nominally neutral materials\, such as hexagonal boron nitride
 \, acquire a spontaneous surface charge at the aqueous interface [J. Am. C
 hem. Soc. 147\, 30107 (2025)].  This intrinsic charging\, observed in othe
 r solids as well\, indicates that the formation of an electric double laye
 r (EDL) is nearly universal at solid–liquid boundaries. Finally\, the sc
 ientists resolved the ultrafast dynamics of the aqueous EDL using femtosec
 ond-resolved optical spectroscopy\, showing that ionic rearrangements occu
 r within tens of picoseconds — faster than diffusion-limited models pred
 ict [Science 388\, 405 (2025)]. Together\, these studies provide a molecul
 arly consistent understanding of how interfacial polarization\, confinemen
 t\, and charge collectively define water’s behavior in nanofluidic and e
 lectrochemical environments.
DTSTAMP:20260611T232157Z
CREATED:20260331T053729Z
LAST-MODIFIED:20260429T053852Z
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