Synthesis of nanocrystalline ceria thin films by low-temperature thermal decomposition of Ce-propionate
Por:
Roura P., Farjas J., Ricart S., Aklalouch M., Guzman R., Arbiol J., Puig T., Calleja A., Peña-Rodríguez O., Garriga M., Obradors X.
Publicada:
1 ene 2012
Resumen:
Thin films of Ce-propionate (thickness below 20 nm) have been deposited by spin coating and pyrolysed into ceria at temperatures below 200 °C. After 1 h of thermal treatment, no signature of the vibrational modes of Ce-propionate is detected by infrared spectroscopy, indicating that decomposition has been completed. The resulting ceria films are nanocrystalline as revealed by X-ray diffraction (average grain size of 2-2.5 nm) and confirmed by microscopy. They are transparent in the visible region and show the characteristic band gap absorption below 400 nm. A direct band gap energy of 3.50 ± 0.05 eV has been deduced irrespective of the pyrolysis temperature (160, 180 and 200 °C). © 2011 Elsevier B.V. All rights reserved.
Filiaciones:
Roura P.:
GRMT, Dept. of Physics, University of Girona, E17071 Girona, Catalonia, Spain
Farjas J.:
GRMT, Dept. of Physics, University of Girona, E17071 Girona, Catalonia, Spain
Ricart S.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
Aklalouch M.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
Guzman R.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
Arbiol J.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain
Puig T.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
Calleja A.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
Peña-Rodríguez O.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
Garriga M.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
Obradors X.:
Institut de Ciència de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Catalonia, Spain
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