Electrophoresis of a Spheroid in a Spherical Cavity Filled with a Salt-Free Solution
Date Issued
2009
Date
2009
Author(s)
Hsieh, Ming-Jui
Abstract
The electrophoretic behavior of a spheroid at an arbitrary position in a spherical cavity is analyzed numerically under a salt-free condition, that is, the liquid phase contains only counterions which come from the dissociation of the functional groups of particle. The influences of the key parameters of the system under consideration, including the total amount of surface charge on the particle, the valence of the counterion, the relative size of the cavity, the aspect ratio of the particle and its position in the cavity. Several interesting results were observed. For example, if the total amount of surface charge is fixed, the magnitude of the electrophoretic mobility for various types of particle generally ranks as prolate>sphere>oblate. The effect of counterion condensation yields a small value of electrophoretic mobility in the case of high valence of the counterions. In addition, it exhibits a local maximum in the electrophoretic mobility as the aspect ratio of the particle varies.
Subjects
electrophoresis
constant surface charge density
spheroid in spherical cavity
salt-free solution
mobility
boundary effect
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R96549023-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):e997f34b5613e53310fb3b7b51d25eab