Landing Dynamics of Swimming Bacteria on a Polymeric Surface:. Effect of Surface Properties
Landing Dynamics of Swimming Bacteria on a Polymeric Surface:. Effect of Surface Properties
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游动细菌在聚合物表面的着陆动力学：。
DOI：
10.1021/acs.langmuir.7b00439
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发表时间：
2017-04-11
期刊：
影响因子：
3.9
通讯作者：
Zhang, Guangzhao
中科院分区：
文献类型：
--
作者：
Qi, Meng;Gong, Xiangjun;Zhang, Guangzhao
细菌附着在物体表面是生活中常见的现象。然而，表面性质如何参与这一过程仍不清楚。使用数字全息显微镜，我们研究了三维运动的鞭毛虫大肠杆菌游泳附近的聚合物表面具有不同的属性在水溶液中粘附前。我们监测的细菌着陆动力学，这表明，密度分布，概率，和细菌的碰撞的方向是由它们的运动性，但轻微的表面性质的影响。然而，表面疏水性通过碰撞降低了细菌的近壁速度，并略微增加了碰撞持续时间。这促进了细菌的着陆和粘附。相比之下，大多数细菌用它们的鞭毛与表面碰撞，鞭毛抵抗粘附。
Landing of bacteria for adhesion on a surface is a common phenomenon in our life. However, how surface properties are involved in this process remains largely unclear. Using digital holographic microscopy, we investigated the three-dimensional motions of flagellate Escherichia coli swimming near polymeric surfaces with different properties in aqueous solution before adhesion. We monitored the bacteria landing dynamics, which shows that the density distribution, the probability, and the orientation for collisions of the bacteria are determined by their motility but are slightly affected by the surface properties. However, surface hydrophobicity reduces the near-wall velocity of the bacteria through collisions and slightly increases the collision duration. This promotes the landing and adhesion of bacteria. By contrast, most bacteria collide with the surface using their flagella, which resist adhesion.