| Raman and Fourier-transform infrared photoacoustic spectra of granular ZnO2 | |
| F. X. Liu; J. L. Yang; T. P. Zhao | |
| 1997 | |
| Source Publication | Physical Review B
 |
| ISSN | 0163-1829 |
| Volume | 55Issue:14Pages:8847-8851 |
| Abstract | Raman and Fourier-transform infrared photoacoustic spectra of nanometer-sized grains of monoclinic ZrO2 (5-80 nm) at room temperature are reported. A characteristic peak around 1040 cm(-1) is observed in the Raman spectra, which strengthens and shifts toward higher frequency with decrease of grain size. Its origin is attributed to a surface phonon mode of ZrO2. The other peaks observed in the Raman spectra shift toward lower frequencies and their bandwidths broaden when the grain size is decreased. A phonon confinement model is used to calculate the size dependencies of the position and bandwidth of peaks and the results show good agreement between theory and experiment. The Fourier-transform infrared photoacoustic spectra indicate that the intensities of the absorption peaks below 1000 cm(-1) decrease, while those above 1000 cm(-1) increase, and the positions of some peaks have redshifts with a decrease of grain size. The above phenomena are also related to the quantum size and surface effects of nanomaterials. |
| description.department | univ sci & technol china,ctr fundamental phys,hefei 230026,anhui,peoples r china. acad sinica,int ctr mat phys,shenyang 110015,peoples r china. univ sci & technol china,dept phys,hefei 230026,peoples r china.;liu, fx (reprint author), univ sci & technol china,struct res lab,hefei 230026,anhui,peoples r china |
| Keyword | Size Spectroscopy Scattering Crystals Zirconia |
| URL | 查看原文 |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/38014 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | F. X. Liu,J. L. Yang,T. P. Zhao. Raman and Fourier-transform infrared photoacoustic spectra of granular ZnO2[J]. Physical Review B,1997,55(14):8847-8851. |
| APA | F. X. Liu,J. L. Yang,&T. P. Zhao.(1997).Raman and Fourier-transform infrared photoacoustic spectra of granular ZnO2.Physical Review B,55(14),8847-8851. |
| MLA | F. X. Liu,et al."Raman and Fourier-transform infrared photoacoustic spectra of granular ZnO2".Physical Review B 55.14(1997):8847-8851. |
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