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Citation: Yu Gang, Wang Kai-Xuan, Huang Jian-Bin, Zhao Bi-Ying. Low Frequency Raman Scattering of CdS Nanocrystallites Embedded in Silicate Glasses[J]. Acta Physico-Chimica Sinica, ;1997, 13(03): 230-235. doi: 10.3866/PKU.WHXB19970309 shu

Low Frequency Raman Scattering of CdS Nanocrystallites Embedded in Silicate Glasses

1.
Institute of Physical Chemistry,Peking University,Beijing 100871

Received Date: 23 August 1996
Available Online: 15 March 1997

Small size CdS crystal doped silica glasses were prepared by sol-gel process. The results showed that the CdS microcrystal sizes can be calculated from the peaks in their low frequency inelastic Raman scattering spectra (LOFIRS). Two types of the vibrational modes were discriminated by the polarized spectra. The second-order Raman scattering peaks were assigned from the exprimental results. The results of average paticle sizes from LOFIRS can correspond to those from TEM. The blue shift in the optical absorption of the obtained glasses was closely related with the size of CdS microcrystallites. The expriment verified that there was a od inverse proportion relationship between the energy of absorption edges and the square of the size of CdS nanocrystallites.
- LOFIRS,
- Raman scattering,
- CdS nanocrystallites,
- Particle size characterization
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