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- W2801746438 abstract "The absorption spectra of a series of tetrahedral-shaped aluminum nanoparticles (ANPs) with side lengths ranging from L = 1.4 to 141.4 nm have been calculated. The size-dependent evolution of structures and spectra has been demonstrated. The plasmon resonance of ANPs is highly sensitive to the particle size and spans a wide spectral region from ultraviolet to visible. As L increases from 70 to 141 nm, an apparent spectral red shift is still observed, although their spectral line shapes do not change much. For the small clusters Aln with n ≤ 560 (or with L ≤ 3.68 nm), their absorption spectra have been calculated by both the real-time time-dependent density functional theory (RT-TDDFT) scheme and the finite difference time domain (FDTD) classical electrodynamics method, whereas for the larger nanoparticles, their absorption spectra have only been calculated by the FDTD method. Aln with n ≤ 560 has two main absorption bands attributed to two kinds of localized surface plasmon resonance modes, vertexes and edges, revealed by the corresponding induced electron densities. RT-TDDFT and FDTD approaches produce obvious spectral differences, and RT-TDDFT predicts more intensive low-energy absorption bands and broader high-energy bands than FDTD. The effect of geometrical relaxation on the absorption spectra of small clusters is visible, which tends to blue shift and broaden the spectra. The smaller the cluster, the larger is the geometrical change." @default.
- W2801746438 created "2018-05-17" @default.
- W2801746438 creator A5001497356 @default.
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- W2801746438 date "2018-04-24" @default.
- W2801746438 modified "2023-10-16" @default.
- W2801746438 title "Size-Dependent Optical Properties of Aluminum Nanoparticles: From Classical to Quantum Description" @default.
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- W2801746438 doi "https://doi.org/10.1021/acs.jpcc.8b02450" @default.
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