From partial to complete optical erasure of azobenzene-polymer gratings: effect of molecular weight

Jaana Vapaavuori*, Robin H. A. Ras, Matti Kaivola, C. Geraldine Bazuin, Arri Priimagi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

28 Citations (Scopus)

Abstract

The ability to control surface functionality by optical inscription and erasure of surface patterns is highly appealing, since it opens up the possibility for the design of complex, spatially varying surface topographies. We show through a supramolecular approach, which allows us to attach nominally equal amounts of azobenzene into polymers of varying molecular weight, that the completeness of optical erasure of high-modulation-depth surface-relief gratings on polymer-azobenzene complexes depends on the molecular weight of the polymer, and therefore on the glass transition temperature of the material used. The optical erasure is further applied to realize surface patterns with varying grating vector directions through masking. All patterning is done at a temperature well below the glass transition temperatures of the materials, which allows different patterning steps to be frozen into the material.

Original languageEnglish
Pages (from-to)11011-11016
Number of pages6
JournalJournal of Materials Chemistry C
Volume3
Issue number42
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • SURFACE-RELIEF GRATINGS
  • LIQUID-CRYSTALLINE POLYMER
  • AZO-POLYMERS
  • MASS-TRANSPORT
  • FILMS
  • MOTIONS
  • CHROMOPHORE
  • POLYIMIDES
  • EFFICIENCY
  • SYSTEMS

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