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Metallic Nanoparticles: growth, morphology and functionalization

Jueves, Septiembre 14, 2017 - 12:00
Place: 
Donostia International Physics Center
Who: 
Magali Benoit, CEMES, Toulouse, France
Source Name: 
DIPC

Metallic nanoparticles
or nanocrystals are one of the most important families of functional materials.
Their remarkable properties, due to their nanometric dimension, combined with
their chemical composition and morphology, have contributed to the increasing
development of their use in fields as diverse as electronics, data storage,
catalysis, optics, bio-medical etc …

However, due to their
small size, the control of their properties depends crucially on the control of
their morphology. This is even more critical for nanocrystals formed of several
elements for which the chemical order (alloy, core-shell, demixed
configuration, etc.) can also influence the morphology, which becomes extremely
difficult to predict. For these reasons, many efforts are deployed today to
understand, on the one hand, the mechanisms of formation of these objects and,
on the other hand, the origin of the stability of the observed morphologies.

Through examples, I
will show how, from atomistic modeling, it is possible to determine the
way  the growth conditions and the
environment can influence the morphologies of metallic nanoparticles. I will
also show that the morphology of a nanoparticle can be of paramount importance
on its functionalization.

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