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Exogenous chemically-driven electromagnets
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DOI：10.1039/D5SC00911A.png)
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Abstract
En 中文
Magnetically-driven dynamic systems have gained considerable attention in multiple applications ranging from cargo delivery to environmental remediation. However; they commonly require ferromagnetic components or sophisticated electromagnetic equipment. In this work we take advantage of the synergy between exogenous bipolar electrochemistry and the classic geometry of a solenoid in order to design an externally driven chemo-electromagnet. By wirelessly triggering redox reactions at each extremity of a solenoid-shaped swimmer; the generated electric current follows the helical path of the coil; thus generating a concentric magnetic field in its center. Such an externally induced redox current generates magnetic fields in the range of μT which are proportional to the applied electric field. The on-board chemically induced magnetic dipole allows the swimmers to perform rotational motion in the presence of an external magnetic field; without the use of traditional ferromagnetic materials. Additionally; when exposing these devices to alternating electric and magnetic fields; well-defined oscillatory motion is produced; demonstrating the efficient electromagnetic control of the dynamic displacement. This opens up novel and; so far; unexplored possibilities for localized chemical conversion via magnetically-driven “chemistry on-the-fly”.
Keywords:
bipolar electrochemistry
solenoid-shaped swimmer
chemo-electromagnet
magnetic field generation
wireless control
Journal
IF:
7.4
Papers:
1.7W
Citations:
9.3W