DIELECTROPHORETIC ARCHITECTURES - Bio-Inspired and Nanoscale Integrated Computing - page 164

Figure 5.8. Microscope images of 3-electrode serial reconfiguration of nano-
wires. The relative phase between the left (source) and middle (latch) electrodes
is modulated from (a,b) 180 1 to (c,d) 0 1 to (e) 180 1 .Scalebarsare15mm.

d wire , the Clausius-Mossotti component perpendicular to the
nanowire axis is approximately

For l wire >>

~

e wire ~

e solv

K ? ¼

þ ~ ;

p
8

p
8

~

e solv 1 e wire

2 pð Þ are the complex permittivities of nanowire and solvent
(the solvent is assumed to be nonconductive at trapping frequencies). Approx-
imating the gradient of the field energy density in the inter-electrode space as
uniform, rð * 2

~ e X e X i s X =

where

Þ V sd = L 3 , where L is the distance between electrode tips.

The dielectrophoretic force is opposed by Stokes drag. The drag coefficient for
an infinitely long, cylindrical nanowire [30] is given by

F drag 8 p

C D

2 r wire u 2 d

Þ ;

1 ð :

002 lnRe Re 2