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The dimensionless dispersion of the metallic nanoparticle under varying conditions at diameter greater than 10−9 nm (a) when Bragg's angle of the nanoparticle is strictly 45°; (b) when Bragg's angle of the nanoparticle ranges between −30° and 30°; (c) when Bragg's angle of the nanoparticle ranges between −45° and 45°; (d) when Bragg's angle of the nanoparticle ranges between −60° and 60°.
