Fig. 2
Surface plasmon resonance spectroscopy of NKCT1 (λmax = 220 nm) (c), GNP (λmax = 530 nm) (a) and GNP-NKCT1 (both the λmax = 220 nm and λmax = 528 nm) (b) detected by UV–Vis. Hydrodynamic diameter of GNP and GNP-NKCT1 were showed by DLS. The size of only GNP was 2–8 nm with average size of 4 nm (d) and GNP-NKCT1 conjugate particle showed 68–122 nm with average of 92 nm (e)