Dauphin Alice L, Arbault Stéphane, Kuhn Alexander, Sojic Neso, Bouffier Laurent
Univ. Bordeaux, ISM, UMR 5255, 33400, Talence, France.
CNRS, ISM, UMR 5255, 33400, Talence, France.
Chemphyschem. 2020 Apr 2;21(7):600-604. doi: 10.1002/cphc.202000019. Epub 2020 Mar 4.
We propose a straightforward access to a rotating light-emitting device powered by wireless electrochemistry. A magnetic stirrer is used to rotate a light-emitting diode (LED) due to the intrinsic magnetic properties of the tips that contain iron. At the same time, the LED is submitted to an electric field and acts as a bipolar electrode. The electrochemical processes that are coupled on both extremities of the LED drive an electron flow across the device, resulting in light emission. The variation of the LED alignment in time enables an alternating light emission that is directly controlled by the rotation rate. The stirring also enables a continuous mixing of the electrolyte that improves the stability of the output signal. Finally, the LED brightness can readily reveal a change of chemical composition in the electrolyte solution.
我们提出了一种通过无线电化学为旋转发光装置供电的直接方法。由于含有铁的尖端具有固有磁性，因此使用磁力搅拌器来旋转发光二极管（LED）。同时，LED受到电场作用并充当双极电极。在LED两端耦合的电化学过程驱动电子流穿过该装置，从而产生发光现象。LED排列随时间的变化实现了由旋转速率直接控制的交替发光。搅拌还能使电解质持续混合，从而提高输出信号的稳定性。最后，LED亮度能够轻易地显示出电解质溶液中化学成分的变化。
