Surface observation of Langmuir-Blodgett films of polyamic acid alkylamine salts and polyimide by atomic force microscopy and friction force microscopy

Shiyoshi Yokoyama, M. Kakimoto, Y. Imai

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The surface morphology of polyamic acid alkylamine salts and polyimide Langmuir-Blodgett (LB) films was observed by atomic force microscopy (AFM) and friction force microscopy (FFM). Three kinds of amines possessing different numbers of alkyl chains were used for the preparation of the polyamic acid salt LB films. In the case of the polyamic acid salt LB films prepared using one-chain alkylamines, the AFM and FFM images afforded an island-like structure which was attributed to the self-aggregation of alkyl chains. The surface structure was not modified at the different deposition surface pressures from 10 to 30 mN/m. Although the polyamic acid salt LB films prepared using two-chain alkylamines afforded uniform surface structure at 10 mN/m, the higher compression up to 30 mN/m changed the LB film into island-like structure. A rather smooth surface was observed for the polyamic acid salt LB films prepared by using three-chain alkylamines. Many domains and boundary regions formed at a low deposition surface pressure tended to be aggregated closely with increasing deposition surface pressure. After conversion of the polyamic acid one-chain alkylamine salt LB films into the polyimide LB films, the surface images showed some defects which corresponded to the bare substrate. The polyimide LB films prepared from the polyamic acid two- or three-chain alkylamine salts afforded uniform surface structure.

Original languageEnglish
Pages (from-to)265-270
Number of pages6
JournalSynthetic Metals
Volume81
Issue number2-3
DOIs
Publication statusPublished - Aug 15 1996
Externally publishedYes

Fingerprint

Langmuir Blodgett films
Langmuir-Blodgett films
polyimides
Polyimides
Atomic force microscopy
Microscopic examination
friction
Salts
atomic force microscopy
Friction
salts
microscopy
acids
Acids
Surface structure
polyamic acid
Amines
Surface morphology
amines
Compaction

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Surface observation of Langmuir-Blodgett films of polyamic acid alkylamine salts and polyimide by atomic force microscopy and friction force microscopy. / Yokoyama, Shiyoshi; Kakimoto, M.; Imai, Y.

In: Synthetic Metals, Vol. 81, No. 2-3, 15.08.1996, p. 265-270.

Research output: Contribution to journalArticle

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