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Issue 5, 2013
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Solution and surfactant-free growth of supported high index facet SERS active nanoparticles of rhenium by phase demixing

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Abstract

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 ∼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.

Graphical abstract: Solution and surfactant-free growth of supported high index facet SERS active nanoparticles of rhenium by phase demixing

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Publication details

The article was received on 11 Sep 2012, accepted on 20 Nov 2012 and first published on 21 Nov 2012


Article type: Paper
DOI: 10.1039/C2TA00262K
Citation: J. Mater. Chem. A, 2013,1, 1566-1572
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    Solution and surfactant-free growth of supported high index facet SERS active nanoparticles of rhenium by phase demixing

    C. D. Valenzuela, M. L. Valenzuela, S. Caceres and C. O'Dwyer, J. Mater. Chem. A, 2013, 1, 1566
    DOI: 10.1039/C2TA00262K

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