Table 2. Nanoparticles Synthesized and Characterization.

				diameter (nm)
particle	generationa	λSPRb	ASPR/A450b	UV–visc	DLSd
Au30	2	523	1.84	30	28.2 ± 0.9
Au50	5	531	2.00	50	48.8 ± 0.4
Au70	7	540	2.05	68	72.5 ± 1.2

^aGeneration of nanoparticles used from the seeding synthetic methodology (see Figure S1).

^bMaximum absorption wavelength from the surface plasmon resonance band of the particles and characteristic ratio were used for diameter estimation.

^cEstimated using the method of Haiss et al.(41) from UV–vis.

^dDiameter from DLS ± standard error from three measurements.