The guidance of labeled microcarriers in microfluidic environments is a prerequisite to the development of magnetic pattern assisted lab‐on‐chip technology. Square wave modulations of in‐plane applied magnetic fields enable the forward and backward locomotion of superparamagnetic microspheres on discrete hexagonally arranged ferromagnetic structures in a flowless microfluidic environment at a single bead level. By using distinct magnetic field sequences, selective directional transportation and two‐way separational motion of different ensembles of beads across a varying stray magnetic field pattern is achieved. Microbeads can be moved along different directions along spatial microcorridors. The demonstrated realization of multifunctional patterned magnetic surfaces enables the controlled positioning and sorting of mixed populations of functionalized microcarriers for biodiagnostic applications.

中文翻译：

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三对称磁性微芯片表面，用于磁性微珠的自由和双向运动

在微流体环境中对标记的微载体进行指导是开发磁模式辅助芯片实验室技术的先决条件。平面内施加磁场的方波调制使超顺磁性微球在单个磁珠水平的无流动微流体环境中在离散的六角形排列的铁磁结构上向前和向后运动。通过使用不同的磁场序列，可以实现跨不同杂散磁场模式的不同磁珠团的选择性定向传输和双向分离运动。微珠可以沿着空间微走廊沿着不同的方向移动。