Fig. 2. Morphological variation of functionalized gold nanoparticles, induced by enzymatic reaction in PBS at 37 °C. (a) TEM images of NGal-NIR-AuNPs/CHO-NIR-AuNPs (2.0 nM) in the absence (left) and presence (right) of β-gal (1.0 μM) after 5 h. Scale bars: 100 nm. (b) Time-dependent variation of the hydrodynamic diameter distributions of NGal-NIR-AuNPs/CHO-NIR-AuNPs (2.0 nM) measured by DLS after the addition of β-gal (1.0 μM).
