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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Three-dimensional closed-loop control of self-propelled microjets
Applied Physics Letters, Volume 103, No. 17, Article 172404, Year 2013
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Description
We demonstrate precise closed-loop control of microjets under the influence of the magnetic fields in three-dimensional (3D) space. For this purpose, we design a magnetic-based control system that directs the field lines towards reference positions. Microjets align along the controlled field lines using the magnetic torque exerted on their magnetic dipole, and move towards the reference positions using their self-propulsion force. We demonstrate the controlled motion of microjets in 3D space, and show that their propulsion force allows them to overcome vertical forces, such as buoyancy forces, interaction forces with oxygen bubbles, and vertical flow. The closed-loop control localizes the microjets within a spherical region of convergence with an average diameter of 406±220 μm, whereas the self-propulsion force allows them to swim at an average speed of 222±74 μm/s within the horizontal plane. Furthermore, we observe that the controlled microjets dive downward and swim upward towards reference positions at average speeds of 232±40 μm/s and 316±81 μm/s, respectively. © 2013 AIP Publishing LLC.
Authors & Co-Authors
Khalil, Islam S.M.
Egypt, New Cairo
German University in Cairo
Magdanz, Veronika
Germany, Dresden
Leibniz-institut Für Festkörper- Und Werkstoffforschung Dresden
Sanchez, Samuel
Germany, Dresden
Leibniz-institut Für Festkörper- Und Werkstoffforschung Dresden
Schmidt, Oliver G.
Germany, Dresden
Leibniz-institut Für Festkörper- Und Werkstoffforschung Dresden
Germany, Chemnitz
Technische Universität Chemnitz
Misra, Sarthak
Netherlands, Enschede
Universiteit Twente
Statistics
Citations: 55
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1063/1.4826141
ISSN:
00036951