Magnitude of the field gradient

The charge or zeta ( ) potential of the filler particle (i.e. the charge at the plane of shear between the particle s diffuse double layer and the bulk liquid phase) can be obtained by measuring its mobility in an applied electric field of known magnitude. The mobility is a function of the field gradient and is therefore expressed as a speed per unit potential gradient (/im/s/V/cm). Mobility and therefore zeta potential are both a function of pH (Figure 6.4). 

According to Eq. (8), if the electric field is uniform, the gradient of the magnitude of the field is zero (V E =0), which means that there is no... 

Equipment is available for a range of applications from whole human body imagers operating at field strengths of up to ca. 8 T to equipment for imaging small samples up to 11.7 T. The achievable resolution depends on the magnitude and duration of the field gradients applied. For small objects the best resolution which has been achieved is of the order of 5-10 pm. For whole body in-vivo applications it is much lower. 

---