title: Deposition of silver nanoshell and reactivity of silver nanoparticles with surface silanols of submicrospherical silica.
abstract: We describe in this report the production of a smooth and uniform silver outer nanoshell with thickness -15 nm on submicrospherical silica, using a rapid and simple one pot chemical route. The reaction mechanism proposed for the formation of the silver nanoshell is the reactivity of silver nanoparticles with surface silanols at high pH, without added coupling agent or surface modification of silica, leading to the formation of the continuous and homogeneous silver nanoshell on the silica spheres.
authors.affiliation: Department of Applied Physics, EPSC and Center for Research in Nanoengineering, Universitat Politècnica de Catalunya, Av. Canal Olimpic s/n, Castelldefels 08860 Barcelona, Spain.
authors.forename: Juan C
authors.initials: JC
authors.lastname: Flores
authors.forename: Victor
authors.initials: V
authors.lastname: Torres
authors.forename: Monica
authors.initials: M
authors.lastname: Popa
authors.forename: Daniel
authors.initials: D
authors.lastname: Crespo
authors.forename: Jose M
authors.initials: JM
authors.lastname: Calderón-Moreno