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Angelomé, P.C.; Pastoriza-Santos, I.; Pérez-Juste, J.; Rodríguez-González, B.; Zelcer, A.; Soler-Illia, G.J.A.A.; Liz-Marzán, L.M. "Growth and branching of gold nanoparticles through mesoporous silica thin films" (2012) Nanoscale. 4(3):931-939
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Abstract:

Composite materials made of mesoporous oxide thin films containing metallic nanoparticles are of high interest in various fields, including catalysis, biosensing and non-linear optics. We demonstrate in this work the fabrication of such composite materials containing a sub-monolayer of gold nanoparticles (GNPs) of various shapes covered with mesoporous silica thin films. Additionally, the shape of the GNPs (and thus their optical properties) can be modified in situ through seeded growth and branching. Such growth proceeds upon wetting with HAuCl 4 solution, a surfactant (cetyltrimethylammonium bromide, CTAB) and a mild reducing agent (ascorbic acid, AA). The effect of varying several reaction parameters (time and CTAB and AA concentrations) was evaluated, showing that more anisotropic particles are obtained at longer reaction times, lower CTAB concentration and higher AA concentration. The final shape of the GNPs was also found to depend on their initial shape and size, as well as the pore size of the mesoporous film covering them. Because the growth proceeds through the pores of the film, it may lead to shapes that are not easily obtained in solution, such as particles with branches on one side only. Finally, we have confirmed that no damage was induced to the mesoporous silica structure during the growth process and thus the final particles remain well covered by the thin film, which can eventually be used as a filter between the GNPs and the outer medium. © 2012 The Royal Society of Chemistry.

Registro:

Documento: Artículo
Título:Growth and branching of gold nanoparticles through mesoporous silica thin films
Autor:Angelomé, P.C.; Pastoriza-Santos, I.; Pérez-Juste, J.; Rodríguez-González, B.; Zelcer, A.; Soler-Illia, G.J.A.A.; Liz-Marzán, L.M.
Filiación:Departamento de Química Física, Universidade de Vigo, 36310 Vigo, Spain
Gerencia Química, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Av. Gral Paz 1499, B1650KNA San Martín Buenos Aires, Argentina
Escuela de Ciencia y TechnologíaU, Niversidad de San Martín, Buenos Aires, Argentina
Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires Buenos Aires, Argentina
Palabras clave:Anisotropic particles; Ascorbic acids; Biosensing; Cetyl trimethyl ammonium bromides; Gold Nanoparticles; Growth process; In-situ; Initial shape; Mesoporous films; Mesoporous oxides; Mesoporous Silica; Mesoporous silica thin films; Metallic nanoparticles; Reaction parameters; Seeded growth; Well-covered; Composite materials; Gold; Ketones; Metallic compounds; Monolayers; Nanoparticles; Optical properties; Organic acids; Surface active agents; Thin films; Film growth
Año:2012
Volumen:4
Número:3
Página de inicio:931
Página de fin:939
DOI: http://dx.doi.org/10.1039/c2nr11547f
Título revista:Nanoscale
Título revista abreviado:Nanoscale
ISSN:20403364
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20403364_v4_n3_p931_Angelome

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Citas:

---------- APA ----------
Angelomé, P.C., Pastoriza-Santos, I., Pérez-Juste, J., Rodríguez-González, B., Zelcer, A., Soler-Illia, G.J.A.A. & Liz-Marzán, L.M. (2012) . Growth and branching of gold nanoparticles through mesoporous silica thin films. Nanoscale, 4(3), 931-939.
http://dx.doi.org/10.1039/c2nr11547f
---------- CHICAGO ----------
Angelomé, P.C., Pastoriza-Santos, I., Pérez-Juste, J., Rodríguez-González, B., Zelcer, A., Soler-Illia, G.J.A.A., et al. "Growth and branching of gold nanoparticles through mesoporous silica thin films" . Nanoscale 4, no. 3 (2012) : 931-939.
http://dx.doi.org/10.1039/c2nr11547f
---------- MLA ----------
Angelomé, P.C., Pastoriza-Santos, I., Pérez-Juste, J., Rodríguez-González, B., Zelcer, A., Soler-Illia, G.J.A.A., et al. "Growth and branching of gold nanoparticles through mesoporous silica thin films" . Nanoscale, vol. 4, no. 3, 2012, pp. 931-939.
http://dx.doi.org/10.1039/c2nr11547f
---------- VANCOUVER ----------
Angelomé, P.C., Pastoriza-Santos, I., Pérez-Juste, J., Rodríguez-González, B., Zelcer, A., Soler-Illia, G.J.A.A., et al. Growth and branching of gold nanoparticles through mesoporous silica thin films. Nanoscale. 2012;4(3):931-939.
http://dx.doi.org/10.1039/c2nr11547f