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Thermal analysis for low temperature synthesis of oxide thin films from chemical solutions

The possibility of synthesizing functional oxide thin films at low temperature via combustion synthesis is analyzed both experimentally and numerically. To this aim, the decomposition of several oxide precursors [copper and cerium acetates, yttrium trifluoroacetate, and In2O3 and La0.7Sr0.3MnO3 (LSMO) nitrate based precursors] has been analyzed by thermal analysis techniques. It is shown that, although these precursors decompose via combustion when they are in the form of powders, their corresponding films show no evidence of combustion. The reason for this different behavior is clearly revealed with numerical simulations. Thin films will hardly experience combustion because the precursor front extinguishes before reaching the precursor-substrate interface leaving a "cool zone" hundreds of micrometers thick. In contrast, it is argued that thin oxide films can be obtained at temperatures lower than powders because of the enhanced gas transport mechanisms that usually limit the decomposition rate

This work was partially funded by the Spanish Programa Nacional de Materiales through Projects MAT2011-28874-C02-01 and MAT2011-28874-C02-02, by the Consolider program Nanoselect, CSD2007-00041, and by the Generalitat de Catalunya Contract Nos. 2009SGR-185 and 2009SGR-770

American Chemical Society (ACS)

Manager: Ministerio de Ciencia e Innovación (Espanya)
Generalitat de Catalunya. Agència de Gestió d’Ajuts Universitaris i de Recerca
Author: Sánchez-Rodríguez, Daniel
Farjas Silva, Jordi
Roura Grabulosa, Pere
Ricart, Susagna
Mestres, Narcís
Obradors, Xavier
Puig, Teresa
Abstract: The possibility of synthesizing functional oxide thin films at low temperature via combustion synthesis is analyzed both experimentally and numerically. To this aim, the decomposition of several oxide precursors [copper and cerium acetates, yttrium trifluoroacetate, and In2O3 and La0.7Sr0.3MnO3 (LSMO) nitrate based precursors] has been analyzed by thermal analysis techniques. It is shown that, although these precursors decompose via combustion when they are in the form of powders, their corresponding films show no evidence of combustion. The reason for this different behavior is clearly revealed with numerical simulations. Thin films will hardly experience combustion because the precursor front extinguishes before reaching the precursor-substrate interface leaving a "cool zone" hundreds of micrometers thick. In contrast, it is argued that thin oxide films can be obtained at temperatures lower than powders because of the enhanced gas transport mechanisms that usually limit the decomposition rate
This work was partially funded by the Spanish Programa Nacional de Materiales through Projects MAT2011-28874-C02-01 and MAT2011-28874-C02-02, by the Consolider program Nanoselect, CSD2007-00041, and by the Generalitat de Catalunya Contract Nos. 2009SGR-185 and 2009SGR-770
Document access: http://hdl.handle.net/2072/296637
Language: eng
Publisher: American Chemical Society (ACS)
Rights: Tots els drets reservats
Subject: Anàlisi tèrmica
Thermal analysis
Capes fines d’òxid -- Síntesi
Oxide thin films -- Synthesis
Title: Thermal analysis for low temperature synthesis of oxide thin films from chemical solutions
Type: info:eu-repo/semantics/article
Repository: Recercat

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