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Extinction efficiency of gold–silver nanoparticles at a size equal to 4 nm for various shapes: (a) tetrahedron, (b) octahedron, (c) decahedron, (d) dodecahedron, (e) icosahedron, (f) cube, (g) truncated octahedron, (h) cuboctahedron, and (i) rhombic dodecahedron.
