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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Understanding the formation and growth of Ag nanoparticles on silver chromate induced by electron irradiation in electron microscope: A combined experimental and theoretical study

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Author(s):
Fabbro, Maria T. [1, 2] ; Gracia, Lourdes [3] ; Silva, Gabriela S. [1] ; Santos, Luis P. S. [4] ; Andres, Juan [3] ; Cordoncillo, Eloisa [2] ; Longo, E. [5]
Total Authors: 7
Affiliation:
[1] Univ Fed Sao Carlos, CDMF INCTMN, Dept Chem, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Jaume 1, Dept Inorgan & Organ Chem, Campus Riu Sec, E-12071 Castellon de La Plana - Spain
[3] Univ Jaume 1, Dept Analyt & Phys Chem, Campus Riu Sec, E-12071 Castellon de La Plana - Spain
[4] Maranhao Fed Inst, INCTMN, Dept Chem, BR-65030005 Sao Luis, MA - Brazil
[5] Univ Estadual Paulista, CDMF INCTMN, Inst Chem, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Solid State Chemistry; v. 239, p. 220-227, JUL 2016.
Web of Science Citations: 11
Abstract

Ag2CrO4 microcrystals were synthesized using the co-precipitation method. These microcrystals were characterized through X-ray diffraction (XRD) with Rietveld analysis, field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) with energy-dispersive spectroscopy (EDS), micro-Raman (MR). XRD patterns and Rietveld refinement data showed that the material exhibits an orthorhombic structure without any deleterious phases. FE-SEM and TEM micrographs revealed the morphology and the growth of Ag nanoparticles on Ag2CrO4 microcrystals during electron beam irradiation. These events were directly monitored in real-time. Their optical properties were investigated using ultraviolet-visible (UV-vis) diffuse reflectance spectroscopy that allowed the calculation of the optical band gap energy. Theoretical analyses based on the density functional theory level indicate that the incorporation of electrons is responsible for structural modifications and formation of defects on the {[}AgO6] and {[}AgO4] clusters, generating ideal conditions for the growth of Ag nanoparticles. (C) 2016 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC