book of abstracts - IM2NP

A B S T R A C T S THURSDAY, JULY 1 N A N O S E A 2 0 1 0
3 – Conclusion
Through the use of DFT calculations, we are able to rationalize tail-related organosilanes features. Indeed,
we propose structural patterns that explain the higher disorder in SAMs formed from short alkyl chains or
polar groups terminated silanes.
4 – References
A. Dkhissi , A. Estève, L. Jeloaica, D. Estève, M. Djafari Rouhani, Chem. Phys. Lett. 2004, 400, 353.
A. Dkhissi, A. Estève, L. Jeloaica, D. Estève, M. Djafari Rouhani, J. Am. Chem. Soc. 2005, 127, 9776.
A. Dkhissi, A. Estève, L. Jeloaica, M. Djafari Rouhani, D. Estève , Comp. Mat. Sci. 2005, 33, 282.
A. Dkhissi, A. Estève, L. Jeloaica, M. Djafari Rouhani, G. Landa , Chem. Phys. 2006, 323, 79.
A. Dkhissi, A. Estève, M. Djafari-Rouhani, L. Jeloaica, J. Phys. Chem. C 2008, 112, 5567.
J.-M. Ducéré, A. Estève, A. Dkhissi, M. Djafari Rouhani, G. Landa, J. Phys. Chem. C 2009, 113, 15652.
17H00-17H30
Metallic Nanocrystals and Nanoalloys obtained by soft chemistry: Growth
process and self-organization into 2D and 3D super crystals.
C.PETIT (Université Pierre et Marie Curie-Paris 6; CNRS UMR 7070, LM2N, 4 place Jussieu 75005 Paris,
France).
Research in the field of nanoparticles has grown tremendously during the last two decades. Such inorganic
nanocrystals are of interest for a variety of applications such as superparamagnets, semiconductors or
catalysis. Thus it is important to have access to methods that give particles in the nanometer range with good
control over size, shape and composition but also with the potential for controlled deposition on a solid
supPort-Pin supercrystals. Depicted numerous study on these nanomaterials, the understanding of
nanocrystal growth and control of nanomorphology is not well defined.
We details here the use of the liquid-liquid phase transfer to obtain either pure metallic Platinum or
Palladium nanocrystals with a control of the size and shape but also for the first time magnetic nanoalloys, as
CoPt, with a perfect control on the composition and size. We will emphasize on the parameters allowing
control the growth process and then the physical characteristic of the inorganic nanocrystals.
The low size polydispersity allows these nanocrystals to self-assemble with a long-range ordering in 2D and
3D super-crystals. The control of shape induces change in the Van der Waals interaction between the
nanocrystal and thus a change in the growth process of the supercrystals. Hence, according to the nanocrystal
shape, simple cubic or face centered cubic super-crystals are observed. It is remarkable to notice that wellfacetted
supercrystals with sizes of the order of 10 micrometers may be obtained.
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