Gold nanoparticles confined in lamellar mesophases

A lamellar surfactant mesophase is used as a soft confinement medium for gold nanoparticles that are directly synthesized inside the lamellar mesophase by the radiolytic reduction of a gold salt incorporated into the water medium. By increasing the water layer thickness of the mesophase, spherical g...

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Bibliographic Details
Published in:RSC advances 2011-01, Vol.1 (3), p.434-439
Main Authors: Abidi, W., Pansu, B., Krishnaswamy, R., Beaunier, P., Remita, H., Impéror-Clerc, M.
Format: Article
Language:English
Subjects:
Confinement
Gold
Lamellar structure
Mesophase
Nanoparticles
Nanorods
Radiolysis
Surfactants
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Summary:A lamellar surfactant mesophase is used as a soft confinement medium for gold nanoparticles that are directly synthesized inside the lamellar mesophase by the radiolytic reduction of a gold salt incorporated into the water medium. By increasing the water layer thickness of the mesophase, spherical gold nanoparticles of increasing size are obtained. The same soft confinement medium is used to synthesize directly in situ by radiolysis gold nanorods (aspect ratio about 10). It is also shown that gold nanorods can be inserted by simple mixing into a sufficiently swollen lamellar phase. In all cases, the structure of the lamellar phase is preserved in the presence of the nanoparticles.
ISSN:2046-2069
2046-2069
DOI:10.1039/c1ra00259g