Grayscale photopatterning of an amorphous polymer thin film prepared by photopolymerization of a bisanthracene-functionalized liquid-crystalline monomer

Hideyuki Kihara, Masashi Motohashi, Kazunari Matsumura, Masaru Yoshida

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A method for grayscale photopatterning of an amorphous polymer film derived from a bisanthracene-functionalized liquid-crystalline monomer is developed. Solution photopolymerization of a monomer with two anthracene moieties, one at each end, affords an amorphous polymer. A combination of irradiation with patterned UV light and heating results in photopatterning on thin films prepared from the polymer. On non-irradiated areas of the film, the polymer reverts to the monomer owing to the thermal back-reaction of the anthracene photodimer, forming an ordered phase. On irradiated areas remaining in the amorphous phase, the thermal back-reaction is suppressed. This phenomenon results in a clear contrast and visual images on the film under polarized light Grayscale photopatterning is also made possible for the solution-polymerized polymer by controlling the intensity of exposure. In addition, rewritable photopatterning can be achieved by melt photopolymerization of the monomer. The new photopatterning is essentially nondestructive because it needs neither image development nor anthraceneexcitation light for reading.

Original languageEnglish
Pages (from-to)1561-1567
Number of pages7
JournalAdvanced Functional Materials
Volume20
Issue number10
DOIs
Publication statusPublished - 2010 May 25

Fingerprint

Photopolymerization
Polymer films
monomers
Monomers
Crystalline materials
Thin films
Polymers
Anthracene
polymers
Liquids
liquids
thin films
anthracene
Amorphous films
Light polarization
Polymer solutions
Ultraviolet radiation
polarized light
Irradiation
Heating

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Grayscale photopatterning of an amorphous polymer thin film prepared by photopolymerization of a bisanthracene-functionalized liquid-crystalline monomer. / Kihara, Hideyuki; Motohashi, Masashi; Matsumura, Kazunari; Yoshida, Masaru.

In: Advanced Functional Materials, Vol. 20, No. 10, 25.05.2010, p. 1561-1567.

Research output: Contribution to journalArticle

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