Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 115, Issue 32, Pages 8119-8124Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1805832115
Keywords
soft robotics; optomechanics; light actuation; silk; elastomers
Categories
Funding
- Office of Naval Research [N00014-16-1-2437]
- US Department of Energy (DOE) Office of Science
- National Science Foundation (NSF) [DMR-1157490]
- State of Florida
- US DOE
- NSF under NSF [1541959]
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The interaction between light and matter has been long explored, leading to insights based on the modulation and control of electrons and/or photons within a material. An opportunity exists in optomechanics, where the conversion of radiation into material strain and actuation is currently induced at the molecular level in liquid crystal systems, or at the microelectromechanical systems (MEMS) device scale, producing limited potential strain energy (or force) in light-driven systems. We present here flexible material composites that, when illuminated, are capable of macroscale motion, through the interplay of optically absorptive elements and low Curie temperature magnetic materials. These composites can be formed into films, sponges, monoliths, and hydrogels, and can be actuated with light at desired locations. Light-actuated elastomeric composites for gripping and releasing, heliotactic motion, light-driven propulsion, and rotation are demonstrated as examples of the versatility of this approach.
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