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Dr. Mohamed Nabil Abd Elmonaem Mohamed Diab :: Publications:

Plasmonic Absorption Enhancement in Au/CdS Nanocomposite
Authors: K. Easawi, M. Nabil, T. Abdallah, S. Negm, and H. Talaat
Year: 2012
Keywords: Nanocomposites, Plasmonics.
Journal: World Academy of Science, Engineering and Technology
Volume: Vol:6, No:1
Issue: 2012
Pages: 63-66
Publisher: Not Available
Local/International: International
Paper Link: Not Available
Full paper Mohammed Nabil Abd El Minam Mohammed_plasmonic-absorption-enhancement-in-au-cds-nanocomposite.pdf
Supplementary materials Not Available

Composite nanostructures of metal core/semiconductor shell (Au/CdS) configuration were prepared using organometalic method. UV-Vis spectra for the Au/CdS colloids show initially two well separated bands, corresponding to surface plasmon of the Au core, and the exciton of CdS shell. The absorption of CdS shell is enhanced, while the Au plasmon band is suppressed as the shell thickness increases. The shell sizes were estimated from the optical spectra using the effective mass approximation model (EMA), and compared to the sizes of the Au core and CdS shell measured by high resolution transmission electron microscope (HRTEM). The changes in the absorption features are discussed in terms of gradual increase in the coupling strength of the Au core surface plasmon and the exciton in the CdS. leading to charge transfer and modification of electron oscillation in Au core.

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