Photochemical memory system in polyimide Langmuir-Blodgett film with azobenzene pendant group

Shiyoshi Yokoyama, Masa aki Kakimoto, Yoshio Imai

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A polyimide Langmuir-Blodgett (LB) film with a photoresponsive azobenzene unit was prepared by the precursor method using polyamic acid alkyl amine salts. An in-plane anisotropic photoisomerization of the azobenzene unit was observed when the LB film was irradiated with linearly polarized UV light. Photoisomerization was induced selectively in the plane parallel to the polarization of the UV irradiation in preference to the perpendicular plane. The photoselection by the polarized light was remarkable and little photoisomerization was observed in the perpendicular plane in the polyimide LB film. The in-plane anisotropic photoisomerization resulted in a molecular reorientation of the azobenze unit in the direction perpendicular to the polarization of the UV irradiation. The resulting dichroism was stable at room temperature for a long time, furthermore, it could be easily erased by irradiation with non-polarized UV light. This property was independent of the polarization angle of the incident UV light and reversible dichroism was photochemically recorded in the LB film in all optical directions.

Original languageEnglish
Pages (from-to)183-186
Number of pages4
JournalThin Solid Films
Volume242
Issue number1-2
DOIs
Publication statusPublished - Apr 15 1994
Externally publishedYes

Fingerprint

Photoisomerization
Azobenzene
Langmuir Blodgett films
Langmuir-Blodgett films
polyimides
Polyimides
Ultraviolet radiation
Data storage equipment
Dichroism
Irradiation
Polarization
dichroism
irradiation
polarization
Light polarization
polarized light
retraining
Amines
amines
Salts

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Photochemical memory system in polyimide Langmuir-Blodgett film with azobenzene pendant group. / Yokoyama, Shiyoshi; Kakimoto, Masa aki; Imai, Yoshio.

In: Thin Solid Films, Vol. 242, No. 1-2, 15.04.1994, p. 183-186.

Research output: Contribution to journalArticle

Yokoyama, Shiyoshi ; Kakimoto, Masa aki ; Imai, Yoshio. / Photochemical memory system in polyimide Langmuir-Blodgett film with azobenzene pendant group. In: Thin Solid Films. 1994 ; Vol. 242, No. 1-2. pp. 183-186.
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