Table S1.

For a given set of DTNB concentrations, the LSPR band shift and hydrodynamic diameter increase are reported together with the maximum salt concentration at which the nanostars remain in suspension

DTNB (mM)	LSPR peak shift (nm)	Hydrodynamic diameter increase (nm)	Maximum salt concentration (M)
0.001	1.33±0.58	6.35±1.77	0.06
0.01	2.33±0.59	9.39±1.49	0.06
0.1	3.67±1.15	8.14±0.63	0.03
1	4.33±1.53	7.04±0.61	0.03
10	4.67±1.53	21.04±0.84	0.03

Note: Bold text indicates the value that was chosen to functionalize the nanostars with.

Abbreviations: DTNB, 5,5-dithio-bis-(2-nitrobenzoic acid); LSPR, localized surface plasmon resonance.