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

Atomic Diffusion Induced by Electron-Beam Irradiation: An in Situ Study of Ag Structures Grown from alpha-Ag2WO4

Full text
Author(s):
Sczancoski, Julio C. [1] ; Maya-Johson, Santiago [2] ; Pereira, Wyllamanney da Silva [1] ; Longo, Elson [1] ; Leite, Edson R. [1, 3]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos UFSCar, Dept Chem, Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos UFSCar, Dept Mat Engn, Sao Carlos, SP - Brazil
[3] CNPEM, Brazilian Nanotechnol Natl Lab LNNano, Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Crystal Growth & Design; v. 19, n. 1, p. 106-115, JAN 2019.
Web of Science Citations: 1
Abstract

In this paper, we investigate the structural and morphological changes caused by the electron-beam irradiation that led to the growth of complex extruded filaments on the surfaces of alpha-Ag2WO4. To provide a complete description of this phenomenon, both scanning electron microscope (SEM) and transmission electron microscope (TEM) were employed in this study. Our experimental results evidenced that the extruded material was able to exhibit growth on different crystallographic faces, depending on the kind of microscope adopted during the electron-beam irradiation. For a more complete analysis, different electron-beam current densities in TEM were used to investigate all in situ modifications in the microcrystals. For the first time, besides the metallic silver, the presence of silver oxides (Ag2O and Ag3O4) were detected in the composition of extruded material. The diffusion mechanisms related to morphological modifications in the samples irradiated in SEM and TEM were discussed in detail. The coprecipitation reaction in dimethyl sulfoxide was chosen as the synthetic route, which favored the appearance of rectangular rod-like alpha-Ag2WO4 microcrystals. A growth mechanism was proposed to explain the formation and growth processes of these microcrystals. (AU)

FAPESP's process: 12/14004-5 - Investigation of the photoluminescence and photocatalytic properties of pure and Mn, Cu, and Zn-doped BaWO4 and BaMoO4 powders
Grantee:Júlio César Sczancoski
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 16/23663-3 - Amino acids-stabilized pyrophosphates nanoparticles controlled by self-assembly
Grantee:Wyllamanney da Silva Pereira
Support type: Scholarships abroad - Research Internship - Doctorate
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
FAPESP's process: 15/07044-9 - Transmission electron microscopy in-situ study of high temperature reaction of nanostructured mixed oxides
Grantee:Santiago Maya Johnson
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/11917-8 - Study of photoluminescent properties and photocatalytic of Ag4P2O7, Ag3-2xNixPO4 and Ag3-2xCuxPO4
Grantee:Wyllamanney da Silva Pereira
Support type: Scholarships in Brazil - Doctorate