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Article Dans Une Revue Advanced Functional Materials Année : 2012

Tuning the porosity of bimetallic nanostructures by a soft templating approach

Anaïs Lehoux
  • Fonction : Auteur
Laurence Ramos
Patricia Beaunier
Daniel Bahena Uribe
  • Fonction : Auteur
Fabrice Audonnet
Arnaud Etcheberry
Miguel José-Yacaman
  • Fonction : Auteur
Hynd Remita

Résumé

We use hexagonal mesophases made of oil-swollen surfactant-stabilized tubes arranged on a triangular lattice in water and doped with metallic salts as templates for the radiolytic synthesis of nanostructures. The nanostructures formed in this type of soft matrix are bimetallic palladium-platinum porous nanoballs composed of 3D-connected nanowires, of typical thickness 2.5 nm, forming hexagonal cells. We demonstrate using electron microscopy and small-angle X-ray scattering that the pore size of the nanoballs is directly determined by the diameter of the oil tube of the doped mesophases, which we have varied in a controlled fashion from 10 to 55 nm. Bimetallic nanostructures comprising various proportions of palladium and platinum can be synthesized. Their alloy structure was evidenced by X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, and high-angular dark field scanning transmission electron microscopy experiments. Our templating approach allows therefore the synthesis of bimetallic nanoballs of tunable porosity and composition.

Dates et versions

hal-00762379 , version 1 (07-12-2012)

Identifiants

Citer

Anaïs Lehoux, Laurence Ramos, Patricia Beaunier, Daniel Bahena Uribe, Philippe Dieudonné, et al.. Tuning the porosity of bimetallic nanostructures by a soft templating approach. Advanced Functional Materials, 2012, 22 (23), pp.4900. ⟨10.1002/adfm.201200666⟩. ⟨hal-00762379⟩
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