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Conference papers
Ligand-free synthesis of gold nanoparticles incorporated within oriented cylindrical block copolymer films : towards optical metamaterials
Abstract : We report a method to incorporate non-functionalized gold nanoparticles (AuNPs) in oriented cylindrical phases of poly(styrene)-b-poly(vinylpyridine) (PS-b-PVP) block copolymers, perpendicular to a substrate. The combination of AFM, TEM, GISAXS and spectroscopy allows complete characterization of the nanocomposites. AuNPs are produced by the ultra-sound reduction of a gold salt in the copolymer solution, prior to the deposition of the films by spin-coating. The AuNPs are found to be located within the PVP cylinders exclusively. The seeded-growth of these pre-formed AuNPs by a further ultra-sound treatment produced plasmonic AuNPs (up to d =10 nm). For perpendicular cylinders, the PVP domains are swollen without any change in their orientation. Ellipsometric optical properties of these plasmonic AuNPs embeded into oriented cylinders show a definite extinction in reflectivity at a precise energy and incidence angle.
Cited literature [5 references]
https://hal-cea.archives-ouvertes.fr/cea-02328369
Contributor : Serge Palacin Connect in order to contact the contributor
Submitted on : Wednesday, October 23, 2019 - 10:58:42 AM
Last modification on : Tuesday, December 7, 2021 - 11:46:11 AM
Long-term archiving on: : Friday, January 24, 2020 - 3:11:36 PM
Contributor : Serge Palacin Connect in order to contact the contributor
Submitted on : Wednesday, October 23, 2019 - 10:58:42 AM
Last modification on : Tuesday, December 7, 2021 - 11:46:11 AM
Long-term archiving on: : Friday, January 24, 2020 - 3:11:36 PM
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Guenoun_Meta2019.pdf
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