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SUMMARY:Soft Ways to Shape Semiconductors with Tough Properties - Sebastia
 n Polarz at the University of Konstanz
DTSTART:20190702T133000Z
DTEND:20190702T143000Z
UID:TALK126046@talks.cam.ac.uk
CONTACT:Elizabeth Tennyson
DESCRIPTION:In materials chemistry\, one uses the term soft-chemistry to d
 ifferentiate mild preparation approaches (e.g. sol-gel) from the harsh con
 ditions necessary in classical solid-state methods. The advantage is\, one
  can access metastable states\, most importantly all sorts of different na
 nostructures. A very powerful strategy is to use so-called single-source p
 recursors\, molecules which contain all elements necessary for the formati
 on of the desired materials. The presentation will highlight three differe
 nt types of semiconductors: ZnO\,1-5 EuO6-7 and CH3NH3PbX3.8-12 \nWe are i
 n particular interested in shape-property correlations. Such correlations 
 are expected to exist\, because the shape of a crystal in general can be d
 efined by a variation of the abundance of certain crystal facets and\, for
  nanoparticles\, the surface to volume ratio is high. The presentation wil
 l give examples on possibilities and limits in controlling nanoparticle sh
 ape. Examples for effects on optical\, electronic and magnetic properties 
 in doped and undoped nanoparticles. The influence of shape factors for the
 ir self-assembly will be discussed\, which is an important issue for futur
 e particle-based materials.\n
LOCATION:JJ Thomson Seminar Room\, Maxwell Centre\, Cavendish Laboratory
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