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Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
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The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
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Updated: Jan 21, 2026

Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale
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Light-Responsive Actuators Based on Graphene.

Yuan-Yuan Gao1, Bing Han1,2, Wen-Ya Zhao1

  • 1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China.

Frontiers in Chemistry
|August 6, 2019
PubMed
Summary
This summary is machine-generated.

Graphene

Keywords:
actuatorsgraphenegraphene oxidelight-responsivephotothermal effect

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Area of Science:

  • Materials Science
  • Robotics
  • Nanotechnology

Background:

  • Graphene, a 2D carbon material, exhibits exceptional physical and chemical properties.
  • These properties, including light absorption, softness, and thermal conductivity, are crucial for developing advanced soft actuators.
  • Graphene and its derivatives are increasingly utilized in light-driven actuator technologies.

Purpose of the Study:

  • To review recent advancements in light-responsive graphene actuators.
  • To summarize the unique properties of graphene beneficial for actuator development.
  • To discuss challenges and future perspectives in this rapidly evolving field.

Main Methods:

  • Literature review of recent research on light-driven graphene actuators.
  • Analysis of graphene's properties relevant to photothermal and photochemical effects.
  • Categorization of actuators based on underlying mechanisms like photothermal expansion and photoisomerization.

Main Results:

  • Various light-driven actuators based on graphene and its derivatives have been successfully developed.
  • Key mechanisms include photothermal expansion, photothermal desorption, photoisomerization, and photo-triggered shape memory effects.
  • Graphene's properties significantly contribute to the performance of these smart actuators.

Conclusions:

  • Graphene-based light-responsive actuators demonstrate significant potential for soft robotics.
  • Continued research is expected to overcome current challenges and unlock new applications.
  • The field is rapidly progressing, driving innovation in graphene-based soft robotics.