Department of Physics and Materials Science
Seminar
Synthesis, Assembly, Spectroscopy
and Applications of
Semiconductor Nanocrystals
Dr Andrey L. Rogach
Physics Department and Center for Nanoscience,
Ludwig-Maximilians-Universität München,
Amalienstr. 54, 80799 Munich, Germany
Date: 17 April 2008 (Thursday)
Time: 11:00 am (tea reception: 10:45 am)
Venue: B5-309
Academic Building
City University of Hong Kong
Enquiry: 2788-7844
Synthesis, Assembly, Spectroscopy
and Applications of
Semiconductor Nanocrystals
Dr Andrey L. Rogach
Physics Department and Center for Nanoscience,
Ludwig-Maximilians-Universität München,
Amalienstr. 54, 80799 Munich, Germany
ABSTRACT
High-quality semiconductor nanocrystals with controllable surface properties and
strong, size-dependent emission can be synthesized nowadays by methods of
colloidal chemistry. They are attractive objects for use as building blocks in
different functional nanostructures, in particular in combination with polymers.
We provide an overview of highly emissive semiconductor nanocrystals
synthesized in our labs and demonstrate several approaches for nanocrystal’s
assembly. Among other techniques, layer-by-layer assembly of water-soluble
nanocrystals and oppositely charged polyelectrolytes allows for fabrication of
multi-layered structures in a very defined and controllable manner, providing
functional coatings both on flat substrates and on colloidal polymer spheres.
Different application aspects of functional composites based on semiconductor
nanocrystals ranging from energy transfer structures to biological markers will be
discussed.