Feedbacks in light-active soft materials

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2023-06-09
Major/Subject
Mcode
Degree programme
Language
en
Pages
4
1-4
Series
Smart Materials for Opto-Electronic Applications, Proceedings of SPIE - The International Society for Optical Engineering, Volume 12584
Abstract
Imitating the self-regulated motions of natural species allows for novel applications in inanimate material systems. These applications include autonomous robotic systems, adaptive devices, and auto-energy harvesting. However, significant challenges exist in accurately controlling stimulus-induced deformations and establishing a reliable relationship between external energy fields and material deformations. In this study, we demonstrate that a simple light-triggered bending actuation in smart material systems based on liquid crystal elastomers is influenced by an opto-mechano-optical feedback mechanism. The pre-curved geometry enables enhance of light absorption upon photothermally induced deformation (from bent to flat), followed by a reduce of energy absorption upon further deformation (from flattening to bending toward the light). This strong nonlinearity in stimulus-induced deformability is governed by positive and negative feedback, and we experimentally verified these mechanisms using a thermal camera. Our results reveal the ubiquitous feedback nature of most light-active polymer systems.
Description
Publisher Copyright: © 2023 SPIE.
Keywords
feedback, liquid crystal elastomer, photoactuation, self-regulated
Other note
Citation
Yang, J, Pi, H, Zhang, H & Zeng, H 2023, Feedbacks in light-active soft materials . in I Rendina, L Petti, D Sagnelli & G Nenna (eds), Smart Materials for Opto-Electronic Applications ., 125840D, Proceedings of SPIE - The International Society for Optical Engineering, vol. 12584, SPIE, pp. 1-4, Smart Materials for Opto-Electronic Applications, Prague, Czech Republic, 25/04/2023 . https://doi.org/10.1117/12.2665325