TEM and HRTEM Evidence for the Role of Ligands in the Formation of Shape-Controlled Platinum Nanoparticles

M. Rosa Axet (1, 2) , Karine Philippot (2) , Bruno Chaudret (2) , Martiane Cabié (3) , Suzanne Giorgio (3) , Claude Henry (3)

1 departament de quimica fisica i quimica inorganica i quimica analitica i quimica organica
2 LCC - Laboratoire de chimie de coordination
3 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille

The morphology of platinum nanoparticles synthesized using an organometallic approach from PtMe2(C8H12) is influenced by the nature of the ligands used as stabilizing agents. The use of long alkyl chain amines leads to the formation of multipodal nanoparticles that transform into compact nano‐objects, adopting cubic, truncated cubic, or cuboctahedral shapes. In contrast, the use of diamine ligands allows the growth of compact (111) arrowlike faces, forming polycrystalline nanoparticles of an overall desert‐rose aspect. Different reaction parameters are studied ([ligand]/[metal] ratio, temperature, solvent identity) in order to optimize the various shapes.

Mots clés: Amine; Crystal growth; Shape control; Platinum; Nanoparticles; Ligands

Domaines: Matériaux; Chimie de coordination

M. Rosa Axet, Karine Philippot, Bruno Chaudret, Martiane Cabié, Suzanne Giorgio, et al.. TEM and HRTEM Evidence for the Role of Ligands in the Formation of Shape-Controlled Platinum Nanoparticles. Small, 2011, 7 (2), pp.235-241. ⟨10.1002/smll.201001112⟩. ⟨hal-02350826⟩