Biomedical Engineering Reference
In-Depth Information
Figure 5.25
Random walk of 10 nm particles originated at the location (0,0). Left, from top to bot-
tom: trajectories for 1, 10, and 500 nanoparticles in a time interval of 50 seconds. Right, from top to
bottom: end point of 1, 10, 500 nanoparticles at
t
= 50 seconds.
Figure 5.26
Square of average distance of particles versus time. From top to bottom: 1, 10, and
500 nanoparticles. In the third figure at bottom, the curve is nearly linear and its slope is approxi-
mately 2.10
-
4
/50 = 400
m
m
2
/s. If we relate this value to the relation <
d
2
> = 4
Dt
, the value of the
slope must be 4
D
and we find
D
= 10
-
10
m
2
is which is the input value in the model.
