Raman scattering from Zn/ZnO core-shell nanoparticles

Geetika Bajaj; R. K. Soni

doi:10.1117/12.814621

3 October 2008 Raman scattering from Zn/ZnO core-shell nanoparticles

Geetika Bajaj, R. K. Soni

Proceedings Volume 7155, Ninth International Symposium on Laser Metrology; 71553B (2008) https://doi.org/10.1117/12.814621
Event: Ninth International Symposium on Laser Metrology, 2008, Singapore, Singapore

Abstract

We have synthesized Zn/ZnO core-shell nanoparticles by pulsed laser ablation in liquid (PLAL) media using nanosecond pulsed Nd:YAG laser. The formation of crystalline core-shell nanoparticles of varying core and shell thickness with varying SDS concentration is confirmed by HRTEM images. The optical absorption shows distinct features corresponding to ZnO exciton and Zn surface plasmon. Raman spectrum from Zn/ZnO core-shell nanoparticles shows E2(high) phonon modes of the bulk which are insensitive to the size and modes unique to the core-shell structures. Moreover, the surface optical mode is dominant feature of the nonresonant spectrum. We have also examined the wavelength dependence of the phonon modes in Zn/ZnO core-shell structure.

Citation Download Citation

Geetika Bajaj and R. K. Soni "Raman scattering from Zn/ZnO core-shell nanoparticles", Proc. SPIE 7155, Ninth International Symposium on Laser Metrology, 71553B (3 October 2008); https://doi.org/10.1117/12.814621

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