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Plasmonic-Enhanced Graphene Oxide-Based Aquatic Robot for Target Cargo Delivery.

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  • 1Department of Biomedical Engineering, City University of Hong Kong, Kowloon 999077, Hong Kong SAR, China.

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Summary

This study introduces a novel aquatic robot using graphene oxide-gold nanorod composites for enhanced light-actuated movement. The design achieves high-speed locomotion and precise control, offering efficient cargo delivery and retrieval in water.

Keywords:
graphene oxideindependent functional modulelight-driven aquatic robotplasmonic-enhanced photothermal effecttargeted cargo delivery

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Area of Science:

  • Materials Science
  • Robotics
  • Nanotechnology

Background:

  • Light-actuated robots are crucial for targeted applications like cargo delivery.
  • Challenges exist in achieving high-speed locomotion and precise control in aquatic environments due to low photothermal efficiency.

Purpose of the Study:

  • To design and fabricate a plasmonic-enhanced aquatic robot for efficient light-actuated motion and cargo delivery.
  • To overcome limitations of conventional light-actuated robots in terms of speed, control, and environmental efficiency.

Main Methods:

  • Fabrication of a dual-module aquatic robot: a graphene oxide (GO)-gold nanorod (Au NR) power module and a calcium alginate (Ca-alginate) cargo module.
  • Utilizing the plasmonic effect of Au NRs to enhance photothermal efficiency and heat transfer.
  • Implementing programmable trajectory following and multi-robot coordination strategies.

Main Results:

  • Achieved a high traveling speed of approximately 35 mm/s due to significantly improved temperature variation (up to three times).
  • Demonstrated precise control over the robot's position and posture in aquatic environments.
  • Successfully executed programmable trajectory following, multi-robot gathering, separation, and cooperative cargo delivery.

Conclusions:

  • The plasmonic-enhanced GO-Au NR/Ca-alginate aquatic robot offers an efficient solution for light-actuated locomotion and targeted cargo delivery.
  • The independent module design allows for easy retrieval of the power module, minimizing residual material.
  • This work provides a novel strategy for developing advanced light-actuated aquatic robots with potential biomedical applications.