2007 Volume 46 Issue 5 Pages 352-356
Although non-aqueous liquids are used for electrophoretic displays, theories for aqueous liquid are usually applied for explanations of the migration mechanism for them. The validity of this bold expansion of the theory is evaluated in this paper. We focused on confirmations of roles of few ions contained in non-aqueous liquids;those ions have been explained to act as the driving charge of particles even in aqueous liquids. We examined influences of the ion density on mobilities of particles in non-aqueous liquids, and showed that the mobility was decreased when the density of ions is increased;this result is not such that expected by the conventional explanation. Our examination also revealed that migration particles had the same polarities in the liquids as those in the air. Thus, we conclude that few ions in non-aqueous liquids don't, at least, always contribute to migration of particles. These results suggest that we have to develop a new theory of migration mechanism specialized for non-aqueous liquids.
