论文标题
准二维细菌在支柱周围游泳：提高陷阱效率和曲率依赖性
Quasi-two-dimensional bacterial swimming around pillars: enhanced trapping efficiency and curvature dependence
论文作者
论文摘要
与三个维度相比，在准二维维度中，MicroSwimmer在准二维中表现出更多的不同行为。由于处理两个平行固体边界的分析难度，这种行为仍然难以捉摸。准二维系统中存在其他障碍，使分析更加复杂。结合了实验和流体动力学模拟，我们研究了空间维度如何影响微晶状体和障碍物之间的相互作用。我们通过蚀刻玻璃覆盖的小腿和观察到的细菌在支柱中观察到的细菌游泳，在准二维尺寸上制造了微观柱。细菌被困在圆形支柱周围，并且随着准二维的增加或随着支柱的曲率降低而提高了捕获效率。对狭窄的蠕动者最简单情况的数值模拟显示出流体动力景点的异常增加，确保增强的相互作用是准二维微水力学学的普遍特性。我们还证明了障碍物的局部曲率通过使用椭圆支柱实验来控制捕获效率。
Microswimmers exhibit more diverse behavior in quasi-two dimensions than in three dimensions. Such behavior remains elusive due to the analytical difficulty of dealing with two parallel solid boundaries. The existence of additional obstacles in quasi-two dimensional systems further complicates the analysis. Combining experiments and hydrodynamic simulations, we investigate how the spatial dimension affects the interactions between microswimmers and obstacles. We fabricated microscopic pillars in quasi-two dimensions by etching glass coverslips and observed bacterial swimming among the pillars. Bacteria got trapped around the circular pillars and the trapping efficiency increased as the quasi-two-dimensionality was increased or as the curvature of the pillars was decreased. Numerical simulations of the simplest situation of a confined squirmer showed anomalous increase of hydrodynamic attractions, establishing that the enhanced interaction is a universal property of quasi-two-dimensional microhydrodynamics. We also demonstrated that the local curvature of the obstacle controls the trapping efficiency by experiments with elliptic pillars.
