| Автор | S As̆krabić |
| Автор | R Kostić |
| Автор | Z Dohević-Mitrović |
| Автор | Z V Popović |
| Дата выпуска | 2007-12-01 |
| dc.description | CeO<sub>2</sub> nanopowder samples synthesized by self-propagating room temperature method were investigated by Raman spectroscopy. The phonon modes observed in the low frequency region (ω < 70 cm<sup>-1</sup>) can be well described by the elastic continuum model, assuming that nanoparticles are of perfect spherical shape and isotropic. Both rigid boundary and stress-free surface cases were analyzed. The calculated vibrational frequency dependencies on the particle diameter were used to identify the modes: (l =2, n = 0), (l = 0, n = 0) and (l = 0, n = 1). Using the facts that mode frequencies scale inversely with particle dimension (ω ∼ 1/D) and that mode-radiation coupling coefficient for this type of vibrations is 1/ω, the correspondence between the particle size distribution and the Raman intensity was made. Particle diameter values ranging from 7 to 8 nm for the rigid boundary condition give the best description of the experimental spectra. This coincides well with the average particle diameter value of 8 nm acquired from the phonon confinement model. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | © 2007 IOP Publishing Ltd |
| Название | Raman scattering from low frequency phonons confined in CeO<sub>2</sub> nanoparticles |
| Тип | paper |
| DOI | 10.1088/1742-6596/92/1/012042 |
| Electronic ISSN | 1742-6596 |
| Print ISSN | 1742-6588 |
| Журнал | Journal of Physics: Conference Series |
| Том | 92 |
| Первая страница | 12042 |
| Последняя страница | 12045 |
| Аффилиация | S As̆krabić; Centre for Solid State Physics and New Materials, Institute of Physics, P. O. Box 68, Pregrevica 118, 11080 Belgrade, Serbia |
| Аффилиация | R Kostić; Centre for Solid State Physics and New Materials, Institute of Physics, P. O. Box 68, Pregrevica 118, 11080 Belgrade, Serbia |
| Аффилиация | Z Dohević-Mitrović; Centre for Solid State Physics and New Materials, Institute of Physics, P. O. Box 68, Pregrevica 118, 11080 Belgrade, Serbia |
| Аффилиация | Z V Popović; Centre for Solid State Physics and New Materials, Institute of Physics, P. O. Box 68, Pregrevica 118, 11080 Belgrade, Serbia |
| Выпуск | 1 |
