3D morphology of Au and Au@Ag nanobipyramids

Julien Burgin (1) , Ileana Florea (2) , Jérôme Majimel (1) , Adam Dobri (1) , Ovidiu Ersen (2) , Mona Tréguer-Delapierre (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg

The morphologies of Au and Au@Ag nanobipyramids were investigated using electron tomography. The 3D reconstruction reveals that the Au bipyramids have an irregular six-fold twinning structure with highly stepped dominant {151} facets. These short steps/edges stabilized via surface adsorbed CTAB favor the growth of silver on the lateral facets leading to strong blue shifts in longitudinal plasmon surface resonance.

Mots clés: Silver; Gold; Nanoparticles; Morphology

Domaines: Matériaux

Julien Burgin, Ileana Florea, Jérôme Majimel, Adam Dobri, Ovidiu Ersen, et al.. 3D morphology of Au and Au@Ag nanobipyramids. Nanoscale, 2012, 4 (4), pp.1299-1303. ⟨10.1039/C2NR11454B⟩. ⟨hal-00667188⟩