skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

Acoustically powered surface-slipping mobile microrobots

Aghakhani, Amirreza ; Yasa, Oncay ; Wrede, Paul ; Sitti, Metin

Proceedings of the National Academy of Sciences - PNAS, 2020-02, Vol.117 (7), p.3469-3477 [Periódico revisado por pares]

United States: National Academy of Sciences

Texto completo disponível

Citações Citado por
  • Título:
    Acoustically powered surface-slipping mobile microrobots
  • Autor: Aghakhani, Amirreza ; Yasa, Oncay ; Wrede, Paul ; Sitti, Metin
  • Assuntos: Acoustic waves ; Acoustics ; Actuation ; Air bubbles ; Body length ; Bubbles ; Cavity resonators ; Controllability ; Cylindrical bodies ; Locomotion ; Magnetic fields ; Microchannels ; Microrobots ; Physical Sciences ; Stability ; Steering
  • É parte de: Proceedings of the National Academy of Sciences - PNAS, 2020-02, Vol.117 (7), p.3469-3477
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    1A.A. and O.Y. contributed equally to this work.
    Edited by John A. Rogers, Northwestern University, Evanston, IL, and approved December 30, 2019 (received for review November 14, 2019)
    Author contributions: A.A. and M.S. designed research; A.A., O.Y., and P.W. performed research; A.A. and O.Y. analyzed data; A.A., O.Y., P.W., and M.S. wrote the paper; A.A. conducted simulations; and M.S. supervised the research.
  • Descrição: Untethered synthetic microrobots have significant potential to revolutionize minimally invasive medical interventions in the future. However, their relatively slow speed and low controllability near surfaces typically are some of the barriers standing in the way of their medical applications. Here, we introduce acoustically powered microrobots with a fast, unidirectional surface-slipping locomotion on both flat and curved surfaces. The proposed three-dimensionally printed, bullet-shaped microrobot contains a spherical air bubble trapped inside its internal body cavity, where the bubble is resonated using acoustic waves. The net fluidic flow due to the bubble oscillation orients the microrobot’s axisymmetric axis perpendicular to the wall and then propels it laterally at very high speeds (up to 90 body lengths per second with a body length of 25 μm) while inducing an attractive force toward the wall. To achieve unidirectional locomotion, a small fin is added to the microrobot’s cylindrical body surface, which biases the propulsion direction. For motion direction control, the microrobots are coated anisotropically with a soft magnetic nanofilm layer, allowing steering under a uniform magnetic field. Finally, surface locomotion capability of the microrobots is demonstrated inside a three-dimensional circular cross-sectional microchannel under acoustic actuation. Overall, the combination of acoustic powering and magnetic steering can be effectively utilized to actuate and navigate these microrobots in confined and hard-to-reach body location areas in a minimally invasive fashion.
  • Editor: United States: National Academy of Sciences
  • Idioma: Inglês
Links
Voltar para lista de resultados
Resultado  1 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.