Kinnunen P, McNaughton B H, Niinimäki J
Fibre and Particle Engineering Laboratory, University of Oulu, 90014 Oulu, Finland.
Rev Sci Instrum. 2013 Aug;84(8):086109. doi: 10.1063/1.4817630.
Time-varying magnetic fields are the basis of many modern devices and are used to remotely power and steer nanomotors and microswimmers. However, the required magnetic field setups are often prohibitively bulky laboratory setups that require technical expertise to build, modify, or relocate. Here we introduce a programmable magnetic field setup based on consumer electronics that is both portable and easy to use. The complete setup consists of a laptop computer, an audio amplifier, and audio inductors and was used to create complex magnetic fields in 0.5-2000 Hz frequency range with up to 4.7 mT amplitude. The setup was also validated using an example application, namely a rotating magnetic field with a constant amplitude and fixed frequency, which has applications in powering nanosensors and microswimmers.
时变磁场是许多现代设备的基础，可用于远程驱动和操控纳米马达与微型游动器。然而，所需的磁场设置通常是极其庞大的实验室装置，构建、修改或重新安置都需要专业技术知识。在此，我们介绍一种基于消费电子产品的可编程磁场设置，它既便携又易于使用。完整的设置包括一台笔记本电脑、一个音频放大器和音频电感器，用于在0.5 - 2000赫兹频率范围内产生幅度高达4.7毫特斯拉的复杂磁场。该设置还通过一个示例应用进行了验证，即具有恒定幅度和固定频率的旋转磁场，其可用于为纳米传感器和微型游动器供电。
