Structure and optical properties of silica-supported Ag-Au nanoparticles.
Bimetallic Ag-Au nanoparticles are synthesized by sequential deposition of Au and Ag on amorphous silica by Radio Frequency (RF)-sputtering under mild conditions. Specimens are thoroughly characterized by a multi-technique approach, aimed at investigating the system properties as a function of the Ag/Au content, as well as the evolution induced by ex-situ annealing under inert (N2) or reducing (4% H2/N2) atmospheres. The obtained results demonstrate the possibility to obtain Ag-Au alloyed nanoparticles with controllable size, shape, structure, and dispersion under mild conditions, so that the optical properties can be finely tuned as a function of the synthesis and thermal treatment conditions.
Barreca
Davide
D
ISTM-CNR and INSTM, Department of Chemical Sciences, Padova University, Via Marzolo, 1-35131 Padova, Italy.
Gasparotto
Alberto
A
Maragno
Cinzia
C
Tondello
Eugenio
E
Gialanella
Stefano
S
D003460:Crystallization / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D008027:Light; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D012542:Scattering, Radiation; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
D046911:Macromolecular Substances; D012834:Silver; D006046:Gold; D012822:Silicon Dioxide