Bimetallic Au//Ag Alloys Inside SiO2 Using a Solid-State Method

Diaz C.; Valenzuela M.L.; Bobadilla D.; Laguna-Bercero M.A.

dc.contributor.author	Diaz C.
dc.contributor.author	Valenzuela M.L.
dc.contributor.author	Bobadilla D.
dc.contributor.author	Laguna-Bercero M.A.
dc.date.accessioned	2020-09-02T22:16:40Z
dc.date.available	2020-09-02T22:16:40Z
dc.date.issued	2017
dc.identifier	10.1007/s10876-017-1261-6
dc.identifier.citation	28, 5, 2809-2815
dc.identifier.issn	10407278
dc.identifier.uri	https://hdl.handle.net/20.500.12728/4282
dc.description	Bimetallic Au/Ag nanostructures have been included inside SiO2 by pyrolysis of the macromolecular complexes Chitosan·(MLn/M′Ln)n·SiO2 and PSP-4-PVP·(MLn/M′Ln)n·SiO2 with MLn = AuCl3 and M′Ln = Ag(CF3SO3). The structural characterization was performed by XRD (X-ray diffraction of powder) and UV–Vis, and the microstructural characterization was done by SEM/EDS analysis HRTEM. The resulting products from the pyrolytic precursors PSP-4-PVP·(AuCl3/AgSO3CF3)n·SiO2 1:1 (1), PSP-4-PVP·(AuCl3/AgSO3CF3)n·SiO2 1:5 (2), Chitosan·(AuCl3/AgSO3CF3)n·SiO2 1:1 (3) and Chitosan·(AuCl3/AgSO3CF3)n·SiO2 1:5 (4) were Au/Ag//SiO2, Au//SiO2 and Ag//SiO2 as well as isolated Au and Ag, depending on the polymeric precursor. The Chitosan polymer precursor induces mainly Ag and Ag/SiO2 nanostructures, while PSP-4-PVP induces mainly Au/Ag//SiO2 nanostructures. This can be explained by the facility to link Ag+ to the NH2 and OH groups of Chitosan than to the pyridine of PSP-4-PVP. On the contrary, Au3+ exhibits most coordination ability to pyridine groups of PSP-4-PVP than NH2- and OH-groups of Chitosan. EDS mapping analysis indicates a uniform distribution of the Au/Ag nanostructure inside the SiO2 matrix. Using reflectance diffuse analysis, the plasmon is consistent with the Au/Ag alloys structure. © 2017, Springer Science+Business Media, LLC.
dc.language.iso	en
dc.publisher	Springer New York LLC
dc.subject	Au/Ag nanostructures
dc.subject	Inside SiO2
dc.subject	State method
dc.title	Bimetallic Au//Ag Alloys Inside SiO2 Using a Solid-State Method
dc.type	Article

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Bimetallic Au//Ag Alloys Inside SiO2 Using a Solid-State Method

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