Hydrodynamic attraction of swimming microorganisms by surfaces
Hydrodynamic attraction of swimming microorganisms by surfaces
复制标题
DOI：
10.1103/physrevlett.101.038102
复制
发表时间：
2008-07-18
影响因子：
8.6
通讯作者：
Lauga, Eric
中科院分区：
文献类型：
--
作者：
Berke, Allison P.;Turner, Linda;Lauga, Eric
在封闭环境中游动的细胞被表面吸引。我们测量两个玻璃板之间的平稳游泳细菌（大肠杆菌）的稳态分布。与早期的研究一致，我们发现边界处的细胞浓度大幅增加。我们从理论上证明，与固体表面的游泳细胞的流体动力学相互作用，导致他们的重新取向的方向平行于表面，以及他们的吸引力由最近的墙壁。一个模型推导出的稳态分布的游泳细胞，这与我们的测量相比，毫不逊色。我们利用我们的数据来估计鞭毛推进力在游泳E。杆菌
Cells swimming in confined environments are attracted by surfaces. We measure the steady-state distribution of smooth-swimming bacteria (Escherichia coli) between two glass plates. In agreement with earlier studies, we find a strong increase of the cell concentration at the boundaries. We demonstrate theoretically that hydrodynamic interactions of the swimming cells with solid surfaces lead to their reorientation in the direction parallel to the surfaces, as well as their attraction by the closest wall. A model is derived for the steady-state distribution of swimming cells, which compares favorably with our measurements. We exploit our data to estimate the flagellar propulsive force in swimming E. coli.