title: Phase separation in polyaniline with near-field scanning optical microscopy.
abstract: 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.
authors.forename: P K
authors.initials: PK
authors.lastname: Wei
authors.forename: J H
authors.initials: JH
authors.lastname: Hsu
authors.forename: W
authors.initials: W
authors.lastname: Fann
authors.forename: K R
authors.initials: KR
authors.lastname: Chuang
authors.forename: H T
authors.initials: HT
authors.lastname: Lee
authors.forename: S A
authors.initials: SA
authors.lastname: Chen