Figure A9.

Absorption spectra of AuNP-RGD-NIR-dye 8 (a) after dialysis and (b) after additional Sephadex purification (A_spr = 0.668/A₄₈₀ = 0.660 gives 1.01 → 3 nm) with three absorption maxima at 534, 690, and 750 nm. Insert in (b): Corresponding emission spectrum (excitation wavelength = 690 nm, emission = 740–840 nm, Em_Max = 790 nm).