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Dr. Luigi Carbone


Monday, April 29th, 2013 at 11:30:00 AM  

Conference room Querzoli - LENS - via Nello Carrara 1 - Sesto Fiorentino (Florence)

Published on-line at 08:49:01 AM on Wednesday, April 24th, 2013

Solution growth approaches to complex nanocrystal structures: semiconductor-based colloidal nanocrystals and heterostructures

Elaborate approaches of colloidal chemistry for fabrication of complex hybrid nanocrystals.

Colloidal nanocrystals (NCs) are inorganic particles made of a few hundred up to a few thousands atoms, which are synthesized in solution. They can be grown from many different materials and can be produced in fairly large amounts and with a high homogeneity in size and shape. As at the nanoscale composition, size and shape dictate peculiar chemical-physical properties of materials, the control over the dimensional regime of NCs represents a landmark achievement in material science.

More elaborate approaches of colloidal chemistry lead to fabrication of more complex hybrid nanocrystals (HNCs) with a spatially controlled distribution of their chemical composition. These are all inorganic multicomponent nano-heterostructures in which domains of distinct materials are arranged via permanent bonding interfaces in elaborate concentric/eccentric onion-like or oligomer-type architectures.

Relevant synthetic strategies will be illustrated, along with systematic examination of the mechanisms by which nanocrystals and heterostructures can be selectively accessed in nonequivalent topological configurations in solution media. The peculiar properties offered by such novel generations of complex nanomaterials will be highlighted as well.

For further informations, please contact Prof. Paolo Foggi.