Dimensions and SPRs of the AuNRs used in the study, determined by TEM analysis and absorbance measurements respectively. The uncertainty of measurement is the standard deviation of the sample.

Name	Width	Length	Aspect ratio	Peak SPR
Au10	9.9 ± 1.1 nm	39.7 ± 5.4 nm	3.98 ± 0.51	811 ± 2 nm
Au25	23.2 ± 2.6 nm	85.6 ± 9.8 nm	3.73 ± 0.63	803 ± 2 nm
Au40	39.8 ± 4.1 nm	122.5 ± 13.8 nm	3.10 ± 0.35	790 ± 2 nm
Au50	42.2 ± 4.6 nm	142.0 ± 17.0 nm	3.38 ± 0.41	841 ± 2 nm