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Communication Dans Un Congrès Année : 2019

Rational Elaboration of mono- and bimetallic nanocrystals

Résumé

The elaboration of new materials with specific properties (catalytic, magnetic, …) needs to control the synthesis of the nanocrystals that constitute it. In particular their size, nanomorphology and cristallinity have to be carefully defined. To design NCs with desired properties, it is necessary to first understand the mechanisms involved in the nucleation and growth processes. Soft chemical synthesis offer a versatile way to produce a large variety of NCs however the understanding is very complex due to the presence of reactants and products that can modify the nucleation and crystal growth. This will be illustrate with example on the formation of anisotropic platinum nanocristals obtained from a thermodynamic or a kinetic controlled growth [1,2]. These comprehensions of the mechanisms allow the elaboration of metallic nanoalloys nanocrystals. [1,3] Recently, to have easier understanding of nucleation and growth processes, we developed a new synthesis involving only two reactants. This simple chemical way gives the opportunity to produce hcp cobalt nanocrystals ferromagnetic at room temperature. [4,5] [1] C. Salzemann, F. Kameche, A.-T. Ngo, P. Andreazza, M. Calatayud, C. Petit, Faraday Discuss. 2015. [2] C. Petit, C. Salzemann, A. Demortiere, In Complex-Shaped Metal Nanoparticles; Sau, T. K.; Rogach, A. L., Eds.; Wiley-VCH Verlag GmbH & Co. KGaA: Weinheim, Germany, 2012; pp. 305–337. [3] F. Kameche, A.-T. Ngo, C. Salzemann, M. Cordeiro, E. Sutter, C. Petit, Phys. Chem. Chem. Phys. 2015. [4] A. Vivien, M. Guillaumont, L. Meziane, C. Salzemann, C. Aubert, S. Halbert, H. Gérard, M. Petit, C. Petit, Chemistry of Materials 2019. [5] L. Meziane, C. Salzemann, C. Aubert, H. Gérard, C. Petit, M. Petit, Nanoscale 2016, 8, 18640.

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Chimie
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hal-03937748 , version 1 (13-01-2023)

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  • HAL Id : hal-03937748 , version 1

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Caroline Salzemann. Rational Elaboration of mono- and bimetallic nanocrystals. 10th International Conference on Materials for Advanced Technologies, ICMAT 2019, Jun 2019, SINGAPORE, Singapore. ⟨hal-03937748⟩
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