Figure 2.

Particle size distribution. This figure shows the particle size distribution measured by a DLS particle size analyzer. The average diameter of particles determined from these measurements is about 200 nm. This diameter is larger than the value measured by TEM due to both surface coating of the nanoparticles and the water solvation around the nanoparticles. The diffusion constant of the nanoparticles in water was 9.7265 × 10^-9 cm²/s.