In-situ Monitoring of Photocontrollable Wrinkle Erasure in Azobenzene-based Supramolecular Systems

Yujiao Dong, Pedro E.S. Silva, Jaakko V.I. Timonen, Jaana Vapaavuori*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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In this contribution, dynamic photoinduced wrinkle erasure enabled by photomechanical changes in supramolecular polymer-azo complexes was characterized via confocal microscopy. Different photoactive molecules, disperse yellow 7 (DY7) and 4,4′-dihydroxyazobenzene (DHAB), were compared to 4-hydroxy-4′-dimethylaminoazobenzene (OH-azo-DMA). The characteristic erasure times of wrinkles were quickly assessed by using an image processing algorithm. The results confirm that the photoinduced movement on the topmost layer can be successfully transferred to the substrate. Furthermore, the chosen supramolecular strategy allows decoupling the effect of molecular weight of the polymer and photochemistry of the chromophore, allowing quantitative comparison of wrinkling erasure efficiency of different materials and providing a facile way to optimize the system for specific applications.

Original languageEnglish
Article numbere202300153
Number of pages8
Issue number13
Early online date5 May 2023
Publication statusPublished - 3 Jul 2023
MoE publication typeA1 Journal article-refereed


  • Azo compounds
  • confocal microscope
  • photocontrollable wrinkle erasure
  • supramolecular chemistry


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