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- W2022763058 abstract "A new sol–gel synthesis procedure of stable calcium copper titanate (CaCu3Ti4O12—CCTO) precursor sols for the fabrication of porous films was developed. The composition of the sol was selected in order to avoid the precipitation of undesired phases; ethanol was used as solvent, acetic acid as modifier and poly(ethyleneglycol) as a linker agent. Films deposited by spin-coating onto oxidized silicon substrates were annealed at 700 °C. The main phase present in the samples, as detected by X-ray diffraction and Raman spectroscopy, was CaCu3Ti4O12. Scanning electron microscopy analysis showed that mesoporous structures, with thicknesses between 200 and 400 nm, were developed as a result of the processing conditions. The films were tested regarding their sensibility towards oxygen and nitrogen at atmospheric pressure using working temperatures from 200 to 290 °C. The samples exhibited n-type conductivity, high sensitivity and short response times. These characteristics indicate that CCTO mesoporous structures obtained by sol–gel are suitable for application in gas sensing." @default.
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- W2022763058 date "2010-06-01" @default.
- W2022763058 modified "2023-10-15" @default.
- W2022763058 title "Sol–gel synthesis of mesoporous CaCu3Ti4O12 thin films and their gas sensing response" @default.
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- W2022763058 doi "https://doi.org/10.1016/j.jssc.2010.03.033" @default.
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