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

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‐object...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2011-01, Vol.7 (2), p.235-241
Main Authors: Axet, M. Rosa, Philippot, Karine, Chaudret, Bruno, Cabié, Martiane, Giorgio, Suzanne, Henry, Claude R.
Format: Article
Language:English
Subjects:
amine
Chemical Sciences
Coordination chemistry
crystal growth
Diamines
Ligands
Material chemistry
Metal Nanoparticles - chemistry
Metal Nanoparticles - ultrastructure
Microscopy, Electron, Transmission
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Nanotechnology
Platinum
Platinum - chemistry
shape control
Solvents
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Summary: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. The morphology of platinum nanoparticles is influenced by the nature of the ligands used as stabilizing agents. The use of a long alkyl chain amine leads to the formation of multipodal nanoparticles which transform into compact nano‐objects, while the use of a diamine ligand generates polyfaceted nanoparticles which expose arrow‐shaped compact faces.
ISSN:1613-6810
1613-6829
1613-6829
DOI:10.1002/smll.201001112