Rismani Yazi Saeed, Nosrati Reza, Stevens Corey A, Vogel David, Escobedo Carlos
Department of Chemical Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada.
Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada.
Biomicrofluidics. 2018 Feb 27;12(1):011101. doi: 10.1063/1.5024508. eCollection 2018 Jan.
Magnetotactic bacteria (MTB) migrate in complex porous sediments where fluid flow is ubiquitous. Here, we demonstrate that magnetotaxis enables MTB to migrate effectively through porous micromodels. Directed MTB can circumvent curved obstacles by traveling along the boundaries and pass flat obstacles by repeatedly switching between forward and backward runs. Magnetotaxis enables directed motion of MTB through heterogeneous porous media, overcoming tortuous flow fields with local velocities as high as 250 m s. Our findings bring new insights into the migration behaviour of MTB in their natural habitats and their potential applications as microbiorobots.
趋磁细菌（MTB）在普遍存在流体流动的复杂多孔沉积物中迁移。在此，我们证明趋磁作用使MTB能够有效地通过多孔微模型迁移。定向的MTB可以沿着边界移动来绕过弯曲的障碍物，并通过反复向前和向后运行之间的切换来越过平坦的障碍物。趋磁作用使MTB能够在非均质多孔介质中定向运动，克服局部速度高达250米/秒的曲折流场。我们的研究结果为MTB在其自然栖息地的迁移行为及其作为微生物机器人的潜在应用带来了新的见解。
