Abstract
The plasmonic effect is introduced in solar thermal areas to enhance light harvest and absorption. The optical properties of plasmonic nanofluid are simulated by finite difference time domain (FDTD) method. Due to the excitation of localized surface plasmon resonance (LSPR) effect, an intensive absorption peak is observed at 0.5 μm. The absorption characteristics are sensitive to particle size and concentration. As the particle size increases, the absorption peak is broadened and shifted to longer wavelength. The absorption of SiO2/Ag plasmonic nanofluid is improved gradually as the volume concentration increases, especially in the UV region. The absorption edge is shifted from 0.6 to 1.0 μm as the volume concentration increases from 0.001 to 0.01. The thermal simulation of suspended SiO2/Ag nanoparticle shows a uniform temperature rise of 17.91 K under solar irradiation (AM 1.5), while under the same condition, the temperature rises in Ag nanoparticle and Al nanoparticle are 11.12 and 5.39 K, respectively. The core/shell plasmonic nanofluid exhibits a higher photothermal performance, which has a potential application in photothermal areas. A higher temperature rise can be obtained by improving the incident light intensity or optical absorption properties of nanoparticles.
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This work was financially supported by the National Natural Science Foundation of China (Grant No. 51506044) and the Fundamental Research Funds for the Central Universities (2014B13014).
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Duan, H., Tang, L., Zheng, Y. et al. Optical and Thermal Enhancement of Plasmonic Nanofluid Based on Core/Shell Nanoparticles. Plasmonics 13, 1135–1141 (2018). https://doi.org/10.1007/s11468-017-0613-2
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DOI: https://doi.org/10.1007/s11468-017-0613-2