| Full text | |
| Author(s): |
Total Authors: 4
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Inst Chem, Dept Phys Chem, Sao Paulo - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | Thin Solid Films; v. 604, p. 69-73, APR 1 2016. |
| Web of Science Citations: | 5 |
| Abstract | |
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 |