Three-dimensional arrangements of polystyrene latex particles with a hyperbolic quadruple electrode system.
An attempt was made to arrange polystyrene latex particles (2, 5, and 10 microm in diameter) dispersed in aqueous media making use of their dielectrophoresis and electrophoresis with a hyperbolic quadruple electrode system. Application of a high-frequency ac field enabled the particles to arrange themselves between the electrodes forming a particle monolayer due to the negative dielectrophoretic force. Simultaneous application of high-frequency ac and dc fields caused the particles to gather in the region surrounded by the electrodes to form particle multilayers. Appropriate choice of the way of applying an electric field thus allowed the reversible control of particle arrangements (monolayer, multilayer, dispersion). Reapplication of an ac field to the particle layers produced highly dense particle multilayers.
Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan. abemasa@rs.noda.tus.ac.jp
Masahiko
M
Abe
Masanori
M
Orita
Hiroyuki
H
Yamazaki
Shinya
S
Tsukamoto
Yuki
Y
Teshima
Toshio
T
Sakai
Takahiro
T
Ohkubo
Nobuyuki
N
Momozawa
Hideki
H
Sakai