Phase separation in polyaniline with near-field scanning optical microscopy.
We report the studies of conjugated polymers, polyaniline thin films, with a near-field scanning optical microscope. Because of the absorption variation in different oxidation states, transmission-mode near-field scanning optical microscope images were employed to map out the distribution of the oxidation states on a submicrometer scale. When the near-field wavelength is varied (between 632.8 and 543.5 nm), the phase separation between the oxidized and the reduced repeated units, with domain sizes on a nanometer-length scale, is observed.
Wei
P K
PK
Hsu
J H
JH
Fann
W
W
Chuang
K R
KR
Lee
H T
HT
Chen
S A
SA