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Silver-copper alloy nanoparticles for metal enhanced luminescence
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View: Figures


Image of FIG. 1.
FIG. 1.

[(a) and (b)] HRTEM and (c) STEM EDS spectra, for the Ag–Cu alloy nanoparticles.

Image of FIG. 2.
FIG. 2.

(a) Extinction spectra of annealed Ag–Cu nanoparticles, (b) Extinction spectra of Ag–Cu nanoparticles and Ag nanoparticles used for MEL experiments and excitation and emission spectra of Alexa Fluor 594 (dotted brown line-emission spectrum, solid brown line-excitation spectrum) and Alexa Fluor 488 (dotted green line-emission spectrum, solid green line excitation spectrum). All spectra were normalized for comparison. Pseudocolored image of luminophores coated on glass and Ag–Cu nanoparticles, (c) Alexa Fluor 488 coated on glass, (d) Alexa Fluor 488 coated on 448 K annealed silver-copper alloy nanoparticles, (e) Alexa Fluor 594 coated on glass, and (f) Alexa Fluor 594 coated on room temperature (298 K) silver-copper alloy nanoparticles.

Image of FIG. 3.
FIG. 3.

Theoretically calculated extinction coefficient (black), theoretically calculated overall quantum efficiency enhancement ratio (blue) Ag (dotted line) and 1:1 Ag–Cu nanospheres (solid line) (size 20 nm, surrounding dielectric media silica glass, separation distance 15 nm, dipole orientation averaged over all solid angles).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Silver-copper alloy nanoparticles for metal enhanced luminescence