Bimetallic Au/Ag nanostructures have been included inside SiO2 by pyrolysis of the macromolecular complexes Chitosan center dot(MLn/M'Ln)(n)center dot SiO2 and PSP-4-PVP center dot(MLn/M'Ln)(n)center dot 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 center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:1 (1), PSP-4-PVP center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:5 (2), Chitosan center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:1 (3) and Chitosan center dot(AuCl3/AgSO3CF3)(n)center dot 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.
%0 Journal Article
%1 RN361
%A Diaz, C.
%A Valenzuela, M.L.
%A Bobadilla, D.
%A Laguna-Bercero, M.A.
%D 2017
%J Journal of Cluster Science
%K au/ag dqcauchile fabrication inside method, nanocrystals, nanoparticles, nanostructures, sio2, state supracrystals,
%N 5
%P 2809-2815
%R 10.1007/s10876-017-1261-6
%T Bimetallic Au//Ag Alloys inside Sio2 Using a Solid-State Method
%U /brokenurl#<Go to ISI>://WOS:000410837600032
%V 28
%X Bimetallic Au/Ag nanostructures have been included inside SiO2 by pyrolysis of the macromolecular complexes Chitosan center dot(MLn/M'Ln)(n)center dot SiO2 and PSP-4-PVP center dot(MLn/M'Ln)(n)center dot 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 center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:1 (1), PSP-4-PVP center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:5 (2), Chitosan center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:1 (3) and Chitosan center dot(AuCl3/AgSO3CF3)(n)center dot 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.
@article{RN361,
abstract = {Bimetallic Au/Ag nanostructures have been included inside SiO2 by pyrolysis of the macromolecular complexes Chitosan center dot(MLn/M'Ln)(n)center dot SiO2 and PSP-4-PVP center dot(MLn/M'Ln)(n)center dot 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 center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:1 (1), PSP-4-PVP center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:5 (2), Chitosan center dot(AuCl3/AgSO3CF3)(n)center dot SiO2 1:1 (3) and Chitosan center dot(AuCl3/AgSO3CF3)(n)center dot 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.},
added-at = {2019-12-04T03:57:35.000+0100},
author = {Diaz, C. and Valenzuela, M.L. and Bobadilla, D. and Laguna-Bercero, M.A.},
biburl = {https://www.bibsonomy.org/bibtex/21e62d46548fc7dc99939360ca12623a6/dqcauchile},
doi = {10.1007/s10876-017-1261-6},
interhash = {5bafb61391a66152175c002486995b19},
intrahash = {1e62d46548fc7dc99939360ca12623a6},
issn = {1040-7278},
journal = {Journal of Cluster Science},
keywords = {au/ag dqcauchile fabrication inside method, nanocrystals, nanoparticles, nanostructures, sio2, state supracrystals,},
number = 5,
pages = {2809-2815},
timestamp = {2019-12-04T03:58:17.000+0100},
title = {Bimetallic Au//Ag Alloys inside Sio2 Using a Solid-State Method},
type = {Journal Article},
url = {/brokenurl#<Go to ISI>://WOS:000410837600032},
volume = 28,
year = 2017
}