Microemulsions as reaction media for the synthesis of Pt nanoparticles

For the synthesis of Pt nanoparticles we used water-in-oil droplet microemulsions as templates. The focus was on the correlation between the size of the microemulsion droplets and that of the resulting Pt particles. To study this correlation in a systematic way, all particles were synthesized at the...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2011-01, Vol.13 (8), p.3048-3058
Main Authors: Magno, L M, Angelescu, D G, Sigle, W, Stubenrauch, C
Format: Article
Language:English
Subjects:
Borohydrides - chemistry
Computer simulation
Correlation
Droplets
Emulsions - chemistry
Kinetics
Metal Nanoparticles - chemistry
Metal Nanoparticles - ultrastructure
Metal particles
Microemulsions
Monte Carlo Method
Monte Carlo methods
Particle Size
Platinum
Platinum - chemistry
Scattering, Small Angle
Synthesis
X-Ray Diffraction
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Summary:For the synthesis of Pt nanoparticles we used water-in-oil droplet microemulsions as templates. The focus was on the correlation between the size of the microemulsion droplets and that of the resulting Pt particles. To study this correlation in a systematic way, all particles were synthesized at the water emulsification failure boundaries where the microemulsion droplets are spherical and where their size can easily be tuned by the amount of added water. The metallic particles were synthesized by mixing two microemulsions one of which contains the metal salt H(2)PtCl(6) and the other the reducing agent NaBH(4). The size and structure of the microemulsion droplets was studied via small-angle X-ray scattering, while the Pt particles were characterized by high-resolution transmission electron microscopy in combination with energy-dispersive X-ray spectroscopy and selected area electron diffraction. The clear correlation between droplet and particle size was further supported by accompanying Monte Carlo simulations.
ISSN:1463-9076
1463-9084
DOI:10.1039/c0cp01085e