The controlled growth of Ag nanoparticles into graphene–TiO2 mesoporous films has been triggered by hard X-ray exposure provided by a synchrotron storage ring. The kinetic process has been studied by UV–visible spectroscopy as a function of the X-ray dose and compared to the nanoparticle growth induced in a bare mesoporous titania matrix. The graphene layers act as a preferential nucleation sites, allowing a faster nucleation of the nanoparticles. Moreover, the growth of larger nanoparticles is also promoted as a function of the exposure dose. The combined bottom-up and top-down approach to fabricate nanocomposites porous films embedding both graphene and plasmonic nanoparticles is expected to be a fundamental tool for the design of new analytical platforms based on the enhancement of the Raman signals.

In situ growth of Ag nanoparticles in graphene/TiO2 mesoporous films induced by Hard X-ray / Malfatti, Luca; Carboni, Davide; Pinna, A; Lasio, B; Marmiroli, B; Innocenzi, Plinio. - In: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. - ISSN 1573-4846. - 79:(2016), pp. 295-302. [10.1007/s10971-016-4052-x]

In situ growth of Ag nanoparticles in graphene/TiO2 mesoporous films induced by Hard X-ray

MALFATTI, Luca;CARBONI, Davide;INNOCENZI, Plinio
2016

Abstract

The controlled growth of Ag nanoparticles into graphene–TiO2 mesoporous films has been triggered by hard X-ray exposure provided by a synchrotron storage ring. The kinetic process has been studied by UV–visible spectroscopy as a function of the X-ray dose and compared to the nanoparticle growth induced in a bare mesoporous titania matrix. The graphene layers act as a preferential nucleation sites, allowing a faster nucleation of the nanoparticles. Moreover, the growth of larger nanoparticles is also promoted as a function of the exposure dose. The combined bottom-up and top-down approach to fabricate nanocomposites porous films embedding both graphene and plasmonic nanoparticles is expected to be a fundamental tool for the design of new analytical platforms based on the enhancement of the Raman signals.
In situ growth of Ag nanoparticles in graphene/TiO2 mesoporous films induced by Hard X-ray / Malfatti, Luca; Carboni, Davide; Pinna, A; Lasio, B; Marmiroli, B; Innocenzi, Plinio. - In: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. - ISSN 1573-4846. - 79:(2016), pp. 295-302. [10.1007/s10971-016-4052-x]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/59469
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