BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/Vienna
BEGIN:DAYLIGHT
DTSTART:20190331T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:CEST
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:20181028T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:CET
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260404T082021Z
UID:5c32fcc04e4cd353958538@ist.ac.at
DTSTART:20190214T100000
DTEND:20190214T110000
DESCRIPTION:Speaker: Claudia Backes\nhosted by Björn Hof\nAbstract: 2D mat
 erials are exciting for two reasons: i) layer number dependent properties 
 and ii) the broad palette of accessible layered crystals potentially givin
 g access to any desired function. Ten years ago\, it was demonstrated that
  2D nanosheets can be obtained from layered crystals via liquid phase exfo
 liation (LPE) resulting in colloidal dispersions. However\, sample polydis
 persity was a problem until recently. Now\, we have arrived at a point whe
 re size selection (e.g. liquid cascade centrifugation\, LCC) and size meas
 urement protocols are in place\, which can be readily applied to the whole
  nanosheet zoo. By comparing various materials\, a model to understand the
  exfoliation was developed. With our realisation that both size and thickn
 ess result in changes in optical extinction spectra due to edge and confin
 ement effects\, it became possible to quantitatively determine the nanoshe
 et dimensions optically. Such metrics have now been developed for ~15 mate
 rials. The understanding of the optical spectra is useful to monitor degra
 dation kinetics in various liquids as function of time/temperature. Activa
 tion energies can be determined and passivation of defects\, e.g. by funct
 ionalisation\, subsequently studied. Functionalisation in general has the 
 potential to ultimately
LOCATION:Mondi Seminar Room 2\, Central Building\, ISTA
ORGANIZER:tguggenb@ist.ac.at
SUMMARY:Claudia Backes: Liquid exfoliation of layered crystals
URL:https://talks-calendar.ista.ac.at/events/1728
END:VEVENT
END:VCALENDAR