磁控软膜可动态变形，实现微流控通道的无线调控。
Shape-programmable Magnetic Soft Membranes for Mechanically Active Microchannels
- 用模板法编程磁化模式，使软膜在磁场下呈正弦形变形。
- 实测显示在层流条件下显著提升微混合效率。
- 适合需要无线操控的下一代芯片实验室系统。
在软材料中编码空间差异的磁化图案，可实现对复杂形变的远程控制，这对微流控平台尤为重要，因通道边界和层流条件的动态调控受限，常制约流体传输与相互作用。本文提出一种可形变的磁性软膜执行器，作为主动微通道组件，可在外部磁场下动态调节形状，从而改变微流控环境。该膜通过基于模板的方法进行磁编程，能在外加磁场下可控地呈现正弦形变。将此膜集成至微通道后，可将被动壁面转变为动态可调界面，实现流体的主动操控，并在层流条件下增强微混合效果。该方法为下一代微流控及芯片实验室系统中无线可控的可变形界面提供了通用平台。
原文摘要 · Abstract (English)
The capability to encode spatially distinct magnetization patterns within soft materials enables remote control over complex deformations. This characteristic is especially important for microfluidic platforms, where limited dynamic control of channel boundaries and laminar flow conditions usually restrict fluid transport and interactions. The present study introduces a shape-programmable magnetic soft membrane actuator as an active microchannel component that can dynamically modulate its shape under magnetic fields and therefore the microfluidic environment. The membrane is magnetically programmed using a template-based approach, which allows it to be controllably deformed in the form of a sinusoid under the influence of an external magnetic field. The membrane's integration into a microchannel converts a passive channel wall into a dynamically changeable interface, allowing active fluid manipulation and enhancing micromixing in laminar flow conditions. The proposed approach establishes a versatile platform for wirelessly controlled deformable interfaces in next-generation microfluidic and lab-on-chip systems.
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