Document Type : Research
Authors
1 Department of Physics، Payame Noor University، Tehran، Iran
2 Department of Physics, Payame Noor University, Tehran, Iran
3 Department of Physics, Shiraz Branch, Islamic Azad University, Shiraz, Iran
Abstract
The phenomenon of localized surface plasmon resonance (LSPR) can be utilized to enhance the light absorption of nanofluids. Core/shell (silica/silver) nanoparticles of various sizes are among the compounds that can be used to increase absorption in nanofluids. Therefore, the optical properties of a hybrid plasmonic nanofluid composed of silica/silver core/shell nanoparticles were studied. The results indicate that the combination of silica/silver core/shell nanostructures of different sizes results in broadband absorption, particularly with core radii ranging from 20 to 50 nanometers. Additionally, as the core radius of the silica increases, the absorption band of the nanofluid extends to longer wavelengths, making the hybrid nanofluid capable of overcoming the limitations of conventional nanofluids with narrowband absorption. Compared to nanofluids containing particles of a single size, the hybrid nanofluid exhibits broadband absorption in the visible to infrared wavelength range. As the particle size increases, the plasmon resonance peak shifts to longer wavelengths. Therefore, larger particles in the hybrid nanofluid enhance the light absorption at longer wavelengths.
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