Mesoscale structures in luminescent conjugated polymer thin films studied by near-field scanning optical microscopy

Czek Haan Tan, AR Inigo, Jui-Hung Hsu, Wunshain Fann, Pei-Kuen Wei

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We report the studies of various conjugated polymer thin films with near-field scanning optical microscopy, NSOM. Firstly, it is shown that MEH-PPV thin film undergoes significant changes in film morphology upon thermal annealing. The once homogeneous morphology becomes inhomogeneous after annealing. Secondly, polarization near-field measurements reveal mesoscale polymer ordering in PPV thin film. The average domain size and the coefficient for linear dichroism were studied as a function of film thickness. Finally, phase separation in polymer blend film was directly observed by transmission NSOM. Time-resolved fluorescence spectra indicate that the phase domains are decomposed of different fractions of the two constituent polymers. The near-field optical microscopy was also used to write lithographic patterns with a resolution of 100 nm, exceeding the diffraction limit. (C) 2001 Elsevier Science Ltd. All rights reserved.

LanguageEnglish
Pages1643-1654
Number of pages12
JournalJournal of Physics and Chemistry of Solids
Volume62
Issue number9-10
DOIs
Publication statusPublished - 10 Sep 2001

Fingerprint

Near field scanning optical microscopy
Conjugated polymers
Polymer films
near fields
microscopy
Thin films
scanning
Polymers
polymers
thin films
Annealing
annealing
polymer blends
Dichroism
Polymer blends
Phase separation
dichroism
Optical microscopy
Film thickness
film thickness

Keywords

  • interchain interactions
  • devices
  • spectroscopy
  • shear force
  • vinylene
  • surface modification
  • light-emitting-diodes
  • morphology

Cite this

Tan, Czek Haan ; Inigo, AR ; Hsu, Jui-Hung ; Fann, Wunshain ; Wei, Pei-Kuen. / Mesoscale structures in luminescent conjugated polymer thin films studied by near-field scanning optical microscopy. In: Journal of Physics and Chemistry of Solids . 2001 ; Vol. 62, No. 9-10. pp. 1643-1654.
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abstract = "We report the studies of various conjugated polymer thin films with near-field scanning optical microscopy, NSOM. Firstly, it is shown that MEH-PPV thin film undergoes significant changes in film morphology upon thermal annealing. The once homogeneous morphology becomes inhomogeneous after annealing. Secondly, polarization near-field measurements reveal mesoscale polymer ordering in PPV thin film. The average domain size and the coefficient for linear dichroism were studied as a function of film thickness. Finally, phase separation in polymer blend film was directly observed by transmission NSOM. Time-resolved fluorescence spectra indicate that the phase domains are decomposed of different fractions of the two constituent polymers. The near-field optical microscopy was also used to write lithographic patterns with a resolution of 100 nm, exceeding the diffraction limit. (C) 2001 Elsevier Science Ltd. All rights reserved.",
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Mesoscale structures in luminescent conjugated polymer thin films studied by near-field scanning optical microscopy. / Tan, Czek Haan; Inigo, AR; Hsu, Jui-Hung; Fann, Wunshain; Wei, Pei-Kuen.

In: Journal of Physics and Chemistry of Solids , Vol. 62, No. 9-10, 10.09.2001, p. 1643-1654.

Research output: Contribution to journalArticle

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T1 - Mesoscale structures in luminescent conjugated polymer thin films studied by near-field scanning optical microscopy

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AU - Inigo, AR

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AB - We report the studies of various conjugated polymer thin films with near-field scanning optical microscopy, NSOM. Firstly, it is shown that MEH-PPV thin film undergoes significant changes in film morphology upon thermal annealing. The once homogeneous morphology becomes inhomogeneous after annealing. Secondly, polarization near-field measurements reveal mesoscale polymer ordering in PPV thin film. The average domain size and the coefficient for linear dichroism were studied as a function of film thickness. Finally, phase separation in polymer blend film was directly observed by transmission NSOM. Time-resolved fluorescence spectra indicate that the phase domains are decomposed of different fractions of the two constituent polymers. The near-field optical microscopy was also used to write lithographic patterns with a resolution of 100 nm, exceeding the diffraction limit. (C) 2001 Elsevier Science Ltd. All rights reserved.

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KW - surface modification

KW - light-emitting-diodes

KW - morphology

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