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Impact of Segmented Magnetization on the Flagellar Propulsion of Sperm‐Templated Microrobots
Advanced Science ( IF 15.1 ) Pub Date : 2021-02-24 , DOI: 10.1002/advs.202004037
Veronika Magdanz 1, 2 , Jacopo Vivaldi 3 , Sumit Mohanty 4 , Anke Klingner 5 , Marilena Vendittelli 3 , Juliane Simmchen 6 , Sarthak Misra 4, 7 , Islam S M Khalil 4
Affiliation  

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.

中文翻译:

分段磁化对精子模板微型机器人鞭毛推进的影响

通过分析具有分段磁化的精子模板微型机器人的变形,可以了解改进被动弹性丝产生推进推力的方式的技术设计特征。磁性纳米粒子通过静电自组装在表面电荷不均匀的牛精子细胞上,产生不同类别的精子模板微型机器人。根据每个细胞片段上纳米颗粒的数量和位置,磁弹性力和粘性力决定鞭毛运动期间每个类别的波型。使用外部旋转磁场沿着这些微型机器人的长度感应被动传播的波,并测量所得的波型。微型机器人对外场的响应揭示了鞭毛推进过程中不同的流场、推进推力和频率响应。这项工作可以预测优化具有分段磁化的柔性磁性微型机器人的设计和推进。
更新日期:2021-04-22
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