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Bae, Joonbum
Bio-Robotics and Control (BiRC) Lab
Research Interests
  • Design and control of physical human-robot interaction systems
  • Soft robotics
  • Intelligent interaction algorithms for virtual reality, tele-operation and rehabilitation
  • Bio-inspired robotics for improved mobility

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Marangoni Effect Inspired Robotic Self-propulsion Over a Water Surface using a Flow-imbibition-powered Microfluidic Pump

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Title
Marangoni Effect Inspired Robotic Self-propulsion Over a Water Surface using a Flow-imbibition-powered Microfluidic Pump
Author
Kwak, BokeonChoi, SoyoungMaeng, JiyeonBae, Joonbum
Issue Date
2021-09
Publisher
NATURE RESEARCH
Citation
SCIENTIFIC REPORTS, v.11, no.1, pp.17469
Abstract
Certain aquatic insects rapidly traverse water by secreting surfactants that exploit the Marangoni effect, inspiring the development of many self-propulsion systems. In this research, to demonstrate a new way of delivering liquid fuel to a water surface for Marangoni propulsion, a microfluidic pump driven by the flow-imbibition by a porous medium was integrated to create a novel self-propelling robot. After triggered by a small magnet, the liquid fuel stored in a microchannel is autonomously transported to an outlet in a mechanically tunable manner. We also comprehensively analyzed the effects of various design parameters on the robot's locomotory behavior. It was shown that the traveled distance, energy density of fuel, operation time, and motion directionality were tunable by adjusting porous media, nozzle diameter, keel-extrusion, and the distance between the nozzle and water surface. The utilization of a microfluidic device in bioinspired robot is expected to bring out new possibilities in future development of self-propulsion system.
URI
https://scholarworks.unist.ac.kr/handle/201301/53411
URL
https://www.nature.com/articles/s41598-021-96553-8
DOI
10.1038/s41598-021-96553-8
ISSN
2045-2322
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