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Synthesis and Self-Assembly of Anisotropic Bimetallic Nanoparticles - Cyrille Hamon - Mercredi 22 septembre 2021 à 14 h

INSP - Sorbonne Université - 4 place Jussieu - 75005 Paris - Barre 22-23, 3e étage, salle 317

Cyrille Hamon - LPS Orsay

Abstract

Wet chemical synthesis is a very versatile method to obtain Au and Ag particles with an astonishing shape diversity, largely through the use of various additives, each of them fulfilling one or several roles. In this framework, I will focus on bimetallic Au/Ag nanoparticles, whose properties are rendered even more diverse by the combination of the two constituents. For instance, depositing Ag on pentatwinned Au bipyramids (AuBPs) is an efficient way to form Ag nanorods (AgNRs) with controllable aspect ratio which can be increased significantly upon controlled Ag addition, shifting LSPR from the visible to the infrared region. Finally, self-assembly directed by facet-facet alignment of gold bipyramids will be shown.