Fig 6. EGF fluorescence emission intensity at 330 nm for free EGF (2 hours 295 nm excitation), EGF-conjugated HAOA-coated gold nanoparticles (2 hours 295 nm excitation), and empty HAOA-coated gold nanoparticles and non-coated plain gold nanoparticles (1 hour 295 nm excitation).

All samples were analyzed at 20°C and excitation slit size fixed at 2.0 mm (4.40 μW).