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Actuation and locomotion driven by moisture in paper made with natural pollen

Proceedings of the National Academy of Sciences - PNAS, 2020-04, Vol.117 (16), p.8711-8718 [Peer Reviewed Journal]

Copyright © 2020 the Author(s). Published by PNAS. ;Copyright National Academy of Sciences Apr 21, 2020 ;Copyright © 2020 the Author(s). Published by PNAS. 2020 ;ISSN: 0027-8424 ;EISSN: 1091-6490 ;DOI: 10.1073/pnas.1922560117 ;PMID: 32253309

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  • Title:
    Actuation and locomotion driven by moisture in paper made with natural pollen
  • Author: Zhao, Ze ; Hwang, Youngkyu ; Yang, Yun ; Fan, Tengfei ; Song, Juha ; Suresh, Subra ; Cho, Nam-Joon
  • Subjects: Actuation ; Actuators ; Biocompatibility ; Biological Sciences ; Biomedical materials ; Biomimetics ; Contractility ; Humidity ; Locomotion ; Material properties ; Physical Sciences ; Pollen ; Reconfiguration ; Surface roughness ; Water absorption
  • Is Part Of: Proceedings of the National Academy of Sciences - PNAS, 2020-04, Vol.117 (16), p.8711-8718
  • Description: Here we describe the development of a humidity-responsive sheet of paper that is derived solely from natural pollen. Adaptive soft material components of the paper exhibit diverse and wellintegrated responses to humidity that promote shape reconfiguration, actuation, and locomotion. This mechanically versatile and nonallergenic paper can generate a cyclically high contractile stress upon water absorption and desorption, and the rapid exchange of water drives locomotion due to hydrodynamic effects. Such dynamic behavior can be finely tuned by adjusting the structure and properties of the paper, including thickness, surface roughness, and processing conditions, analogous to those of classical soapmaking. We demonstrate that humidity-responsive paper-like actuators can mimic the blooming of the Michelia flower and perform selfpropelled motion. Harnessing the material properties of bioinspired systems such as pollen paper opens the door to a wide range of sustainable, eco-friendly, and biocompatible material innovation platforms for applications in sensing, actuation, and locomotion.
  • Publisher: United States: National Academy of Sciences
  • Language: English
  • Identifier: ISSN: 0027-8424
    EISSN: 1091-6490
    DOI: 10.1073/pnas.1922560117
    PMID: 32253309
  • Source: GFMER Free Medical Journals
    PubMed Central
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