M. Deggelmann et al., ELECTROKINETIC PROPERTIES OF AQUEOUS SUSPENSIONS OF INTERACTING RODLIKE TOBACCO MOSAIC-VIRUSES IN THE GAS-LIKE AND LIQUID-LIKE PHASE, Journal of physical chemistry, 98(1), 1994, pp. 364-368
Electrophoretic mobility and conductivity data of aqueous suspensions
of rodlike tobacco mosaic virus (TMV) (length l = 300 nm, diameter 2a
= 18 nm) are presented in a wide range of particle concentration, belo
w and above the overlap concentration c = l particle/length3. The mob
ility is investigated in relation to the small ion concentration down
to salt-free suspensions. At low small ion concentration a screened Co
ulomb interaction between he particles appears, i.e., the double layer
s surrounding the particles begin to overlap. This leads to a decrease
s of the mobility of TMV particles. Another effect which influences th
e particle mobility is the change in the dissociation degree of the we
ak surface groups on the particles which are responsible for the parti
cle charge. It is investigated to what extent potential and particle c
harge can be determined by means of the standard theories.