Evidence map›Paper›PMID 34471178›Full record

ArticleScientific reports2021

Marangoni effect inspired robotic self-propulsion over a water surface using a flow-imbibition-powered microfluidic pump.

Bokeon Kwak, Soyoung Choi, Jiyeon Maeng, Joonbum Bae

Abstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed.

  1. Photochemical Fuel Carrier Molecules for Robotic Embodied Energy.Advanced materials (Deerfield Beach, Fla.) · 2026
    Article
  2. Review
  3. Article
  4. Article
  5. Undulatory Propulsion at Milliscale on Water Surface.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024
    Article
  6. Article
  7. Article
  8. Pen-drawn Marangoni swimmer.Nature communications · 2023
    Article
  9. Article
  10. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Bokeon KwakBio-Robotics and Control (BiRC), Department of Mechanical Engineering, Ulsan National Institute of Science and Engineering (UNIST), Ulsan, 44919, Republic of Korea.
Soyoung ChoiBio-Robotics and Control (BiRC), Department of Mechanical Engineering, Ulsan National Institute of Science and Engineering (UNIST), Ulsan, 44919, Republic of Korea.
Jiyeon MaengBio-Robotics and Control (BiRC), Department of Mechanical Engineering, Ulsan National Institute of Science and Engineering (UNIST), Ulsan, 44919, Republic of Korea.
Joonbum BaeBio-Robotics and Control (BiRC), Department of Mechanical Engineering, Ulsan National Institute of Science and Engineering (UNIST), Ulsan, 44919, Republic of Korea. jbbae@unist.ac.kr.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

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.

Identifiers

PMID34471178
PMCPMC8410760

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.