Langmuir--Schaefer films of Nafion with incorporated TiO(2) nanoparticles |
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Authors: | Bertoncello Paolo Notargiacomo Andrea Nicolini Claudio |
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Institution: | Nanoworld Institute and Biophysics Division, University of Genoa, Corso Europa 30, 16132 Genoa, Italy. p.bertoncello@warwick.ac.uk |
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Abstract: | An easy method of incorporating TiO(2) nanoparticles into Nafion perfluorinated ionomer is proposed. Ultrathin films of Nafion were prepared by employing the Langmuir-Schaefer (LS) technique. The pressure-area isotherm study of a Langmuir monolayer of Nafion at the air-water interface on different concentrations of NaCl as the subphase allowed us to find the best experimental conditions for the deposition of stable Langmuir-Schaefer films. Incorporation of TiO(2) nanoparticles was performed by dipping Nafion LS films in a solution of TiO(2) nanoparticles. The uniformity of the TiO(2) incorporation was detected by UV-visible spectroscopy. The morphology of the Nafion, Nafion/TiO(2) nanoparticles thin films, and the changes due to the annealing procedure were investigated by atomic force microscopy. Interestingly, the AFM investigation showed that Nafion and Nafion/TiO(2) LS films have thermal stability up to 600 degrees C. |
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