Solution and surfactant-free growth of supported high index facet SERS active nanoparticles of rhenium by phase demixing
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Valenzuela, Carlos Díaz
Valenzuela, María Luisa
Royal Society of Chemistry (RSC)
Stable, high-index facet Re nanoparticles have been grown by a solid state synthetic method, negating the need for solutions or surfactants to control seeding, supracrystallization and NP shape. By using mixtures of K[ReO4] and the cyclic triphosphazene [NP(O2C12H8)]3, high-index facet nanoparticles and nanocrystals [similar]3 nm in size can be seeded and grown from drop-cast films and powders due to phase demixing of the metallopolymer. NP dispersions are formed directly within a carbon support that liquefies, allowing NP coarsening and ripening, and the eventual formation of a solidified graphitic support filled with crystals. Successful growth of mesoscale supracrystals of Re also occurs from ripening of nucleated NP seeds, incubated within a solidified and partially dewetted solid support that patterns the surface. The supported Re NP dispersions also exhibit surface enhanced Raman scattering within a graphitic matrix.
Nanoparticles , Dispersions , Raman spectroscopy , Surface scattering , High-index facets , Nanoparticles and nanocrystals , Re nanoparticles , Solid supports , Supra crystals , Surface enhanced , Raman Scattering (SERS) , Surfactant-free , Synthetic methods
Valenzuela, C. D., Valenzuela, M. L., Caceres, S. and O'Dwyer, C. (2013) 'Solution and surfactant-free growth of supported high index facet SERS active nanoparticles of rhenium by phase demixing', Journal of Materials Chemistry A, 1(5), pp. 1566-1572.
© The Royal Society of Chemistry 2013