Transmission Electron Microscopy in-situ study of high temperature reaction of nanostructured mixed oxides.

• Grant number: 15/07044-9
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: December 01, 2015
• End date: April 30, 2018
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Edson Roberto Leite
• Grantee: Santiago Maya Johnson
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID

Abstract

This work addresses the characterization of the high temperature reactions between different nanoparticles oxides, CeO2-ZrO2 and CeO2-SnO2, by the direct observation of the phenomenon by in situ High Resolution Transmission Electron Microscopy (HR-TEM). The changes in the size and morphology of the nanoparticles, and the phase transformations that can occur during the reactions will be documented. For this study, the High Angle Annular Dark FieldScanning Transmission Electron Microscopy (HAADF-STEM) technique will be used to follow the arrangement of the atoms in the superstructures; and Electron Energy Loss Spectroscopy (EELS) measurements will be made to measure changes in the oxidation states during heating and reaction of the nanoparticles.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SCZANCOSKI, JULIO C.; MAYA-JOHSON, SANTIAGO; PEREIRA, WYLLAMANNEY DA SILVA; LONGO, ELSON; LEITE, EDSON R.. Atomic Diffusion Induced by Electron-Beam Irradiation: An in Situ Study of Ag Structures Grown from alpha-Ag2WO4. Crystal Growth & Design, v. 19, n. 1, p. 106-115, JAN 2019. (16/23663-3, 13/07296-2, 15/11917-8, 15/07044-9, 12/14004-5)