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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.)

Gas sensing and conductivity relationship on nanoporous thin films: A CaCu3Ti4O12 case study

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Felix, A. A. [1] ; Longo, E. [1] ; Varela, J. A. [1] ; Orlandi, M. O. [1]
Total Authors: 4
[1] Sao Paulo State Univ UNESP, Inst Chem, Dept Phys Chem, Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Thin Solid Films; v. 604, p. 69-73, APR 1 2016.
Web of Science Citations: 5

In thiswork, CaCu3Ti4O12 (CCTO) thin films were synthesized with the polymeric precursormethod and characterized by structural (X-ray diffraction) and morphological (scanning electron microscopy) techniques. These films were composed of a single CCTO phase and presented high surface porosity. The gas sensing response and conductivity-type relationship were investigated by two different approaches. Gas sensing measurements performed at different temperatures using different atmospheres showed that the CCTO has n-type gas sensing behavior and can detect small amounts of oxidizing gases with high sensitivity and selectivity. The type of intrinsic conductivity was also investigated through thermopower measurements, which indicated intrinsic n-type conductivity in CCTO thin films prepared with the polymeric precursor method and confirmed the direct relationship between the gas sensing behavior and the intrinsic conductivity of CCTO. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/14647-6 - Gas sensors based on p-type metal semiconductor oxides: in-situ and operando advanced studies
Grantee:Anderson André Felix
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 09/00367-6 - Study of Properties of CaCu3Ti4O12 Nanostructured Films.
Grantee:Anderson André Felix
Support type: Scholarships in Brazil - 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