Nanoparticles for Bioimaging: Analytical Characterization and Measurements - Nanotechnology for Biomedical Imaging and Diagnostics - page 156

mag
80 000 x

HV
15.0 kV

det
ETD

WD
6.3 mm

HFW
3.73 µm

1 µm

figure 6.9 Scanning electron micrograph of magnetic nanoparticles drop cast on a piece

of silicon wafer.

mag
5 000 x

HV
10.0 kV

det
Helix

WD
4.7 mm

HFW
59.7 µm

20 µm

figure 6.10 Scanning electron micrograph of the surface of an Arabidopsis thaliana seed
imaging without sputter coating in low-vacuum mode.

6.3.3 dls

DlS is a statistical particle sizing technique that can provide size distributions of the
hydrodynamic radius of particles in the subnanometer to micron size range. In DlS,
particles suspended in solution are illuminated with a laser; as the particles move
due to Brownian motion, they scatter the laser light, creating fluctuations in the
intensity of light that reaches the detector. as the speed of the Brownian motion of