Figure 3.

Extinction of different sized NPs. (a) Au, (b) Au3Cu, (c) AuCu, (d) AuCu3, and (e) Cu alloy nanoparticles (n = 1; Qabs is the extinction coefficient).

Su and Wang Nanoscale Research Letters 2013 8:408   doi:10.1186/1556-276X-8-408
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