What is it about?
It is about the size dependent local field enhancement factor (LFEF) of spherical core-shell nanomaterial. From the potential distributions in the core, the spacer, the metallic shell, and host medium, and using the modified Drude-Sommerfeld model, we separately obtained the expressions for LFEF of core/shell and core/spacer/shell nanocomposites. By changing the sizes of each of the components of the nanocomposites in these expressions, we found that the LFEF of CdSe@Ag increases with a decrease in the size of the core. When the spacer (ZnSe) is placed between the core (CdSe) and the shell (Ag), the resonance peaks increased with increase in the size of the core which was not observed in the case of the two layered core/shell nanocomposites having the same core and shell sizes.
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Why is it important?
The possibility of obtaining size dependent LFEF by adjusting the sizes of nanoparticles makes these nanocomposites attractive for applications in nonlinear optics, photocatalysis, and optoelectronics.
Perspectives
I hope this article can address about the effects of size of the core, the spacer and the metallic shell on the LFEF of spheroidal core-shell nanoparticle in the surrounding host medium.
Garoma Dhaba Bergaga
Addis Ababa University
Read the Original
This page is a summary of: Size dependent local field enhancement factor of CdSe based core@shell spherical nanoparticles, Materials Research Express, April 2022, Institute of Physics Publishing,
DOI: 10.1088/2053-1591/ac60e2.
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