Construction of a photothermal Venus flytrap from conductive polymer bimorphs

Hanwhuy Lim, Teahoon Park, Jongbeom Na, Chihyun Park, Byeonggwan Kim, Eunkyoung Kim

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50 Citations (Scopus)


A photothermally foldable soft bimorph was prepared via the dry transfer of poly(3,4-ethylenedioxythiophene) (PEDOT) doped with tosylate onto a poly(dimethylsiloxane) film. The photothermal folding was optimized via reversible actuation by controlling the thickness of each layer and the temperature increase to afford large deflection and displacement up to 150° and >20 mm, respectively, upon exposure to near-infrared (NIR) light (808 nm). A two-dimensional array of the bimorph converted into complex three-dimensional architectures, such as a Venus flytrap, under light and reversibly unfolded in the dark. Taking advantage of the photothermal nature of PEDOT, a localized heat pocket was generated inside the folding structure. Thus, a Venus flytrap with a hot pocket reaching 100 °C was realized for the first time. The Venus flytrap could trap and move an object within a few seconds of NIR exposure.

Original languageEnglish
Article numbere399
JournalNPG Asia Materials
Issue number7
Publication statusPublished - 2017 Jul 7

Bibliographical note

Funding Information:
We thank Paul Ahre at LLNL for fabricating the SMP coil mold. We acknowledge financial support from a National Research Foundation (NRF) grant funded by the Korean government (Ministry of Science, ICT & Future Planning, MSIP) through the Global Research Lab. (GRL: 2016K1A1A2912753).

Publisher Copyright:
© The Author(s) 2017.

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics


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