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Histograms of gold nanorod aspect ratios synthesized with (a) 50 μL silver nitrate, mean aspect ratio of 2.3 ± 0.3 (mean length 44.8 ± 4.1nm, mean width 19.8 ± 2.9 nm); and with (b) 250 μL silver nitrate, mean aspect ratio of 3.6 ± 0.6 (mean length 51.0± 4.4 nm, mean width 14.1±2.1).
