Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films
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 nanopart...
| Authors: | ; ; ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2012 |
| Country: | Argentina |
| Institution: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repository: | CONICET Digital (CONICET) |
| Language: | English |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/194781 |
| Online Access: | http://hdl.handle.net/11336/194781 |
| Access Level: | Open access |
| Keyword: | plasmons Gold Nanoparticles Mesoporous Films Nanoparticle growth https://purl.org/becyt/ford/2.10 https://purl.org/becyt/ford/2 |
| _version_ | 1878403998611931136 |
|---|---|
| author | Angelomé, Paula C. |
| author2 | Pastoriza Santos, Isabel Pérez Juste, Jorge Rodríguez-González, Benito Zelcer, Andrés Soler Illia, Galo Juan de Avila Arturo Liz Marzán, Luis M. |
| author2_role | author author author author author author |
| author_browse | Angelomé, Paula C. Liz Marzán, Luis M. Pastoriza Santos, Isabel Pérez Juste, Jorge Rodríguez-González, Benito Soler Illia, Galo Juan de Avila Arturo Zelcer, Andrés |
| author_facet | Angelomé, Paula C. Pastoriza Santos, Isabel Pérez Juste, Jorge Rodríguez-González, Benito Zelcer, Andrés Soler Illia, Galo Juan de Avila Arturo Liz Marzán, Luis M. |
| author_role | author |
| collection | CONICET Digital (CONICET) |
| description | 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | AR_e8177db56bbdfd6ef50349ca4eeacef2 |
| identifier_str_mv | Angelomé, Paula C.; Pastoriza Santos, Isabel; Pérez Juste, Jorge; Rodríguez-González, Benito; Zelcer, Andrés; et al.; Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films; Royal Society of Chemistry; Nanoscale; 4; 3; 3-2012; 931-939 2040-3364 2040-3372 CONICET Digital CONICET |
| institution | Consejo Nacional de Investigaciones Científicas y Técnicas |
| instname_str | Consejo Nacional de Investigaciones Científicas y Técnicas |
| language | eng |
| network_acronym_str | AR |
| network_name_str | Argentina |
| oai_identifier_str | oai:ri.conicet.gov.ar:11336/194781 |
| publishDate | 2012 |
| publishDateSort | 2012 |
| publisher | Royal Society of Chemistry |
| publisherStr | Royal Society of Chemistry |
| reponame_str | CONICET Digital (CONICET) |
| spelling | Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films Angelomé, Paula C. Pastoriza Santos, Isabel Pérez Juste, Jorge Rodríguez-González, Benito Zelcer, Andrés Soler Illia, Galo Juan de Avila Arturo Liz Marzán, Luis M. plasmons Gold Nanoparticles Mesoporous Films Nanoparticle growth https://purl.org/becyt/ford/2.10 https://purl.org/becyt/ford/2 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. Fil: Angelomé, Paula C.. Universidad de Vigo; España Fil: Pastoriza Santos, Isabel. Universidad de Vigo; España Fil: Pérez Juste, Jorge. Universidad de Vigo; España Fil: Rodríguez-González, Benito. Universidad de Vigo; España Fil: Zelcer, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología; Argentina Fil: Soler Illia, Galo Juan de Avila Arturo. Universidad de Buenos Aires; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Liz Marzán, Luis M.. Universidad de Vigo; España Royal Society of Chemistry http://hdl.handle.net/11336/194781 Angelomé, Paula C.; Pastoriza Santos, Isabel; Pérez Juste, Jorge; Rodríguez-González, Benito; Zelcer, Andrés; et al.; Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films; Royal Society of Chemistry; Nanoscale; 4; 3; 3-2012; 931-939 2040-3364 2040-3372 CONICET Digital CONICET |
| spellingShingle | Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films Angelomé, Paula C. plasmons Gold Nanoparticles Mesoporous Films Nanoparticle growth https://purl.org/becyt/ford/2.10 https://purl.org/becyt/ford/2 |
| status_str | publishedVersion |
| title | Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films |
| title_full | Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films |
| title_fullStr | Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films |
| title_full_unstemmed | Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films |
| title_short | Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films |
| title_sort | Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films |
| topic | plasmons Gold Nanoparticles Mesoporous Films Nanoparticle growth https://purl.org/becyt/ford/2.10 https://purl.org/becyt/ford/2 |
| topic_facet | plasmons Gold Nanoparticles Mesoporous Films Nanoparticle growth https://purl.org/becyt/ford/2.10 https://purl.org/becyt/ford/2 |
| url | http://hdl.handle.net/11336/194781 |