Fluidic torque-enabled object manipulation by microrobot collectives

Micro-scale systems experience strong viscous interactions because of the low-Reynolds-number regime in which they exist. This means that fluidic manipulation and actuation of passive objects can be enabled and influenced by the individual spin rate of micro-scale agents, the number of agents, and their positions relative to the objects. We explore these parameter spaces and find that the fluidic torque generated by a magnetic microrobot collective can be exploited to apply bidirectional torque to concentric ring structures and demonstrate this through physical experiments and numerical simulations. Additionally, we demonstrate how the fluidic torque of the microrobots can be exploited to actuate gear trains, rotate comparatively large 3D objects, dynamically self-assemble internally driven ring structures, and absorb and expel large numbers of circular objects. Finally, we show emergent behaviors where the microrobot collective’s morphology and method of locomotion change as a function..., , , # Data from: Fluidic torque-enabled object manipulation by microrobot collectives

Access this dataset on Dryad; DOI: [10.5061/dryad.kd51c5bm7](https://doi.org/10.5061/dryad.kd51c5bm7)

This dataset corresponds to the results shown in the manuscript: “Fluidic Torque-Enabled Object Manipulation by Microrobot Collectives”, Science Advances

### Data_for_Fig_1.zip

Figure 1 characterizes the azimuthal flow fields generated by a single 300 μm diameter magnetic microrobot spinning at the air–water interface under a rotating magnetic field.

#### Description of the data and file structure

OVERVIEW

This dataset contains the experimental measurements used to generate:

* Fig. 1C: Flow velocity (u, mm/s) as a function of magnetic field frequency (Omega, Hz) at various normalized distances from the microrobot center.
* Fig. 1D: Normalized flow velocity (u / (omega*R)) as a function of normalized distance (d/R), demonstrating inverse-square scaling consistent with low-Reynolds-number hydrodynami...