Dimensions of the features of AuNSs and their LSPR peak positions as determined by TEM analysis; adapted with permission from ref. 41. Copyright © 2018 American Chemical Society.

AuCl4−/mol	Ag+/mol	Quantity of seeds/particles	LSPRmax (nm)	Core diameter (nm)	Tip–tip distance (nm)	Branch density
Change in the amount of d = 5 nm Au seeds in growth solution
2.5 × 10−6	1.02 × 10−7	2.5 × 1011	800	93 ± 11	145 ± 30	∼7–8
2.5 × 10−6	1.02 × 10−7	5.0 × 1011	738	70 ± 9	105 ± 28	∼8–10
2.5 × 10−6	1.02 × 10−7	1.0 × 1012	690	57 ± 8	80 ± 16	∼5–6
2.5 × 10−6	1.02 × 10−7	2.0 × 1012	658	46 ± 7	67 ± 15	∼5–6
2.5 × 10−6	1.02 × 10−7	3.0 × 1012	638	39 ± 6	59 ± 14	∼4–5
Change in the amount of d = 12 nm Au seeds in growth solution
2.5 × 10−6	1.02 × 10−7	1.5 × 109	800	105 ± 13	148 ± 23	∼9–10
2.5 × 10−6	1.02 × 10−7	3.0 × 109	750	89 ± 11	130 ± 18	∼9–10
2.5 × 10−6	1.02 × 10−7	4.5 × 109	696	86 ± 27	114 ± 36	∼6–7
2.5 × 10−6	1.02 × 10−7	7.5 × 109	650	64 ± 10	89 ± 17	∼5–6
2.5 × 10−6	1.02 × 10−7	1.0 × 108	630	67 ± 17	50 ± 12	∼4–5
Change the Au 3+ /Ag + molar ratio with d = 5 nm Au seeds in growth solution
2.5 × 10−6	2.50 × 10−8	1.0 × 1012	658	104 ± 13	187 ± 32	∼3
2.5 × 10−6	5.10 × 10−8	1.0 × 1012	742	90 ± 13	134 ± 30	5–6
2.5 × 10−6	2.04 × 10−7	1.0 × 1012	782	96 ± 16	137 ± 26	∼10
2.5 × 10−6	3.06 × 10−7	1.0 × 1012	822	68 ± 9	136 ± 31	∼15