Light-Driven Continual Oscillatory Rocking of a Polymer Film

Marina Pilz da Cunha, Akhil R. Peeketi, Adithya Ramgopal, Ratna K. Annabattula, Albert P.H.J. Schenning (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)


Achieving oscillatory motion in polymers without requiring on/off switching of stimuli is a current challenge. Hereby, a free-standing liquid crystal polymer (LCP) is demonstrated to undergo a sustained oscillatory motion when triggered by light, moving back and forth, resembling the motion of a rocking-chair. Two polymer films having different azobenzene photo-switches have been studied, revealing photoswitch requirements as well as illumination conditions necessary to sustain oscillations. The motion presented here shows how feedback loops involving light-triggered actuation, self-shadowing and a shifting center of gravity can be utilized to achieve self-sustained motion in free-standing polymers.

Original languageEnglish
Pages (from-to)1149-1152
Number of pages4
Issue number11
Publication statusPublished - Nov 2020


  • azo compounds
  • light-driven liquid crystal actuators
  • light-driven oscillation
  • polymers
  • sustained motion


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