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Photochemically responsive polymer films enable tunable gliding flights
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Photochemically responsive polymer films enable tunable gliding flights
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Journal Article
Photochemically responsive polymer films enable tunable gliding flights
2024
Overview
Miniaturized passive fliers based on smart materials face challenges in precise control of shape-morphing for aerodynamics and contactless modulation of diverse gliding modes. Here, we present the optical control of gliding performances in azobenzene-crosslinked liquid crystal networks films through photochemical actuation, enabling reversible and bistable shape-morphing. First, an actuator film is integrated with additive constructs to form a rotating glider, inspired by the natural maple samara, surpassing natural counterparts in reversibly optical tuning of terminal velocity, rotational rate, and circling position. We demonstrate optical modulation dispersion of landing points for the photo-responsive microfliers indoors and outdoors. Secondly, we show the scalability of polymer film geometry for miniature gliders with similar light tunability. Thirdly, we extend the material platform to other three gliding modes: Javan cucumber seed-like glider, parachute and artificial dandelion seed. The findings pave the way for distributed microflier with contactless flight dynamics control.
Miniature passive fliers are of interest, but there are challenges in controlling their motion. Here, the authors report the use of light-responsive thin films for optical control of the gliding of passive fliers.
