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(Color online) (a) AFM image of Au film. (b) Fe-SEM image of Au film, showing single Au nanoparticle.
(Color online) Raman shift of (a) and coated with 10 and of Au nanoparticles showing strong surface enhanced Raman intensity. (b) PL spectra of CdSe and Au on Si substrates at room temperature.
(Color online) Differential optical absorption and extinction spectra of Au on glass substrates. The Au nanoparticle absorption/extinction is shown by an arrow.
(Color online) Current-voltage characteristics of and Au diodes are shown for various light illuminations. The area of the diodes is about , and they are kept the same for all diodes used here. A schematic diagram of junction diode device structure with metallic nanoparticles is shown in the inset.
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