Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites

Texto completo
Autor(es):
Oliveira, L. H. ; Ramirez, M. A. ; Ponce, M. A. ; Ramajo, L. A. ; Albuquerque, A. R. ; Sambrano, J. R. ; Longo, E. ; Castro, M. S. ; La Porta, F. A.
Número total de Autores: 9
Tipo de documento: Artigo Científico
Fonte: Materials Research Bulletin; v. 93, p. 47-55, SEP 2017.
Citações Web of Science: 8
Resumo

Combined experimental and theoretical investigations were conducted on the electronic structure, as well as the optical and gas-sensing properties of mixed-phase CaCu3Ti4O12/CaTiO3 (CCTO/CTO) composites, which were synthesized by a solid-state reaction using various milling durations. Our results revealed that these CCTO/CTO composites have a broad photoluminescence (PL) emission band located at 450 nm, which is strongly influenced by the milling process duration. Scanning electron microscopy images confirmed that the use of longer milling durations favored the formation of pores and increased the active surface area of the CCTO/CTO thick films. The thick films were prepared using the screen printing technique, and hence, could be structured for gas-sensing applications. Our theoretical findings may further elucidate the electronic structure associated with the interfacial band alignment (type I straddling gap) of the CCTO/CTO composite systems. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 16/07476-9 - Nanotubos porosos de carbono e de semicondutores inorgânicos: uma abordagem computacional
Beneficiário:Julio Ricardo Sambrano
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
Beneficiário:Elson Longo da Silva
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs