研究目的
To investigate the spectra of the Raman scattering of a dielectric Pb3(Р0.5V0.5О4)2 in a monocrystalline state and crystallized in synthetic opal pores and their analysis for changing the parameters of a crystal lattice caused by conditions of nanoscale pores.
研究成果
The comparative analysis of Raman spectra showed changes in spectral lines position, half-width, and integral intensity. These effects were explained by changes in bond lengths between P-O and Pb-PO4, as well as reducing angle between some of the O-P-O bonds. Another reason could be the appearance of surface states of nanocrystals formed in opal pores.
研究不足
The study did not investigate the integral intensity of the spectra due to different measurement conditions (different optical schema and equipment).
1：Experimental Design and Method Selection:
The study involved the comparative analysis of Raman spectra of Pb3(Р0.5V0.5О4)2 in monocrystalline state and crystallized in synthetic opal pores. The spectra were fitted to reveal changes in spectral lines position and their half-widths.
2：5V5О4)2 in monocrystalline state and crystallized in synthetic opal pores. The spectra were fitted to reveal changes in spectral lines position and their half-widths.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Synthetic opals with Pb3(Р0.5V0.5О4)2 crystallized in their pores were used. The average linear pore size in opal was 70 nm.
3：5V5О4)2 crystallized in their pores were used. The average linear pore size in opal was 70 nm.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: LabRam HR800 confocal Raman microscope and diffraction spectrometer DFS-12 were used for measuring Raman spectra.
4：Experimental Procedures and Operational Workflow:
Filling of pores with Pb3(Р0.5V0.5О4)2 was carried out from a melt at temperatures 990 - 1010 °С. Raman spectra were measured in "reflection" geometry.
5：5V5О4)2 was carried out from a melt at temperatures 990 - 1010 °С. Raman spectra were measured in "reflection" geometry.
Data Analysis Methods:
5. Data Analysis Methods: The decomposition of measured Raman spectra into elementary spectral components was performed using the PeakFit 4.0 software product.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
