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Applied Optics

Applied Optics


  • Vol. 36, Iss. 15 — May. 20, 1997
  • pp: 3301–3304

Phase separation in polyaniline with near-field scanning optical microscopy

Pei-Kuen Wei, Jui-Hung Hsu, Wunshain Fann, Kuen-Ru Chuang, Hsun-Tsing Lee, and Show-An Chen  »View Author Affiliations

Applied Optics, Vol. 36, Issue 15, pp. 3301-3304 (1997)

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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.

© 1997 Optical Society of America

Original Manuscript: August 20, 1996
Revised Manuscript: December 2, 1996
Published: May 20, 1997

Pei-Kuen Wei, Jui-Hung Hsu, Wunshain Fann, Kuen-Ru Chuang, Hsun-Tsing Lee, and Show-An Chen, "Phase separation in polyaniline with near-field scanning optical microscopy," Appl. Opt. 36, 3301-3304 (1997)

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