%0 Journal Article
%T Tuning the porosity of bimetallic nanostructures by a soft templating approach
%+ Laboratoire Charles Coulomb (L2C)
%A Lehoux, Anaïs
%A Ramos, Laurence
%A Beaunier, Patricia
%A Uribe, Daniel Bahena
%A Dieudonné, Philippe
%A Audonnet, Fabrice
%A Etcheberry, Arnaud
%A José-Yacaman, Miguel
%A Remita, Hynd
%Z Journal: Advanced Functional Materials 22, 4900 (2012)
%< avec comité de lecture
%Z L2C:12-236
%@ 1616-301X
%J Advanced Functional Materials
%I Wiley
%V 22
%N 23
%P 4900
%8 2012-12-05
%D 2012
%Z 1212.1064
%R 10.1002/adfm.201200666
%Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X 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.
%G English
%L hal-00762379
%U https://hal.science/hal-00762379
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021