Impact of Segmented Magnetization on the Flagellar Propulsion of Sperm-Templated Microrobots

Veronika Magdanz; Jacopo Vivaldi; Sumit Mohanty; Anke Klingner; Marilena Vendittelli; Juliane Simmchen; Sarthak Misra; Islam S.M. Khalil

doi:10.1002/advs.202004037

Impact of Segmented Magnetization on the Flagellar Propulsion of Sperm-Templated Microrobots

Veronika Magdanz (Corresponding author), Jacopo Vivaldi, Sumit Mohanty, Anke Klingner, Marilena Vendittelli, Juliane Simmchen, Sarthak Misra, Islam S.M. Khalil (Corresponding author)

Research output: Contribution to journal › Article › Academic › peer-review

32 Citations (Scopus)

Abstract

Technical design features for improving the way a passive elastic filament produces propulsive thrust can be understood by analyzing the deformation of sperm-templated microrobots with segmented magnetization. Magnetic nanoparticles are electrostatically self-assembled on bovine sperm cells with nonuniform surface charge, producing different categories of sperm-templated microrobots. Depending on the amount and location of the nanoparticles on each cellular segment, magnetoelastic and viscous forces determine the wave pattern of each category during flagellar motion. Passively propagating waves are induced along the length of these microrobots using external rotating magnetic fields and the resultant wave patterns are measured. The response of the microrobots to the external field reveals distinct flow fields, propulsive thrust, and frequency responses during flagellar propulsion. This work allows predictions for optimizing the design and propulsion of flexible magnetic microrobots with segmented magnetization.

Original language	English
Article number	2004037
Journal	Advanced Science
Volume	8
Issue number	8
DOIs	https://doi.org/10.1002/advs.202004037
Publication status	Published - 21 Apr 2021
Externally published	Yes

Funding

V.M. acknowledges the DFG within the excellence program of the TU Dresden, and the Alexander von Humboldt Foundation for funding. V.M. thanks the Applied Zoology group of Klaus Reinhardt & team for general support, lab space & equipment use. I.S.M.K. thanks Stella A. Kruit for experimental advice. This work is supported by funds from the Netherlands Organization for Scientific Research (Innovational Research Incentives SchemeVIDI:SAMURAI project # 14855). J.S. acknowledges the Volkswagen foundation for the Freigeist fellowship (grant number 91619).

Funders	Funder number
Deutsche Forschungsgemeinschaft
Technische Universität Dresden
Nederlandse Organisatie voor Wetenschappelijk Onderzoek	14855

Keywords

biohybrid microrobots
flagellar propulsion
magnetic actuation
nanoparticles
sperm cells

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10.1002/advs.202004037

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title = "Impact of Segmented Magnetization on the Flagellar Propulsion of Sperm-Templated Microrobots",

abstract = "Technical design features for improving the way a passive elastic filament produces propulsive thrust can be understood by analyzing the deformation of sperm-templated microrobots with segmented magnetization. Magnetic nanoparticles are electrostatically self-assembled on bovine sperm cells with nonuniform surface charge, producing different categories of sperm-templated microrobots. Depending on the amount and location of the nanoparticles on each cellular segment, magnetoelastic and viscous forces determine the wave pattern of each category during flagellar motion. Passively propagating waves are induced along the length of these microrobots using external rotating magnetic fields and the resultant wave patterns are measured. The response of the microrobots to the external field reveals distinct flow fields, propulsive thrust, and frequency responses during flagellar propulsion. This work allows predictions for optimizing the design and propulsion of flexible magnetic microrobots with segmented magnetization.",

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AU - Magdanz, Veronika

AU - Vivaldi, Jacopo

AU - Mohanty, Sumit

AU - Klingner, Anke

AU - Vendittelli, Marilena

AU - Simmchen, Juliane

AU - Misra, Sarthak

AU - Khalil, Islam S.M.

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N2 - Technical design features for improving the way a passive elastic filament produces propulsive thrust can be understood by analyzing the deformation of sperm-templated microrobots with segmented magnetization. Magnetic nanoparticles are electrostatically self-assembled on bovine sperm cells with nonuniform surface charge, producing different categories of sperm-templated microrobots. Depending on the amount and location of the nanoparticles on each cellular segment, magnetoelastic and viscous forces determine the wave pattern of each category during flagellar motion. Passively propagating waves are induced along the length of these microrobots using external rotating magnetic fields and the resultant wave patterns are measured. The response of the microrobots to the external field reveals distinct flow fields, propulsive thrust, and frequency responses during flagellar propulsion. This work allows predictions for optimizing the design and propulsion of flexible magnetic microrobots with segmented magnetization.

AB - Technical design features for improving the way a passive elastic filament produces propulsive thrust can be understood by analyzing the deformation of sperm-templated microrobots with segmented magnetization. Magnetic nanoparticles are electrostatically self-assembled on bovine sperm cells with nonuniform surface charge, producing different categories of sperm-templated microrobots. Depending on the amount and location of the nanoparticles on each cellular segment, magnetoelastic and viscous forces determine the wave pattern of each category during flagellar motion. Passively propagating waves are induced along the length of these microrobots using external rotating magnetic fields and the resultant wave patterns are measured. The response of the microrobots to the external field reveals distinct flow fields, propulsive thrust, and frequency responses during flagellar propulsion. This work allows predictions for optimizing the design and propulsion of flexible magnetic microrobots with segmented magnetization.

KW - biohybrid microrobots

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Impact of Segmented Magnetization on the Flagellar Propulsion of Sperm-Templated Microrobots

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