Biomedical Engineering Reference
In-Depth Information
Figure 10.16
Crossover frequency between positive and negative DEP for polystyrene latex beads
of different radii in pure water. The line is a best fit of (10.28).
that can be formed using four electrodes successively addressed (Figure 10.17). If
the angular velocity of the field is sufficiently high, the induced-dipole orientation
makes some angle with the electric field and, as a consequence, a torque acts on the
particle and makes it rotate. This torque experienced by the particle is then given
by [33-35, 47]:
3
2
(10.29)
G = -
4
πε ε
a
Im(
f
)
×
E
0
r l
,
CM
with the same conventions as in the preceding part.
Figure 10.17
Physical principle of electrorotation.
