Open access
Datum
2023-09Typ
- Journal Article
Abstract
As a next-generation toolkit, microrobots can transform a wide range of fields, including micromanufacturing, electronics, microfluidics, tissue engineering, and medicine. While still in their infancy, acoustically actuated microrobots are becoming increasingly attractive. However, the interaction of acoustics with microstructure geometry is poorly understood, and its study is necessary for developing next-generation acoustically powered microrobots. We present an acoustically driven helical microrobot with a length of 350 μm and a diameter of 100 μm that is capable of locomotion using a fin-like double-helix microstructure. This microrobot responds to sound stimuli at ~12 to 19 kHz and mimics the spiral motion of natural microswimmers such as spirochetes. The asymmetric double helix interacts with the incident acoustic field, inducing a propulsion torque that causes the microrobot to rotate around its long axis. Moreover, our microrobot has the unique feature of its directionality being switchable by simply tuning the acoustic frequency. We demonstrate this locomotion in 2D and 3D artificial vasculatures using a single sound source. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000633936Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Science AdvancesBand
Seiten / Artikelnummer
Verlag
AAASOrganisationseinheit
09700 - Ahmed, Daniel / Ahmed, Daniel
Förderung
853309 - Acousto-Magnetic Micro/Nanorobots for Biomedical Applications (EC)