標題: Collective flow dynamics across a bacterial carpet: Understanding the forces generated
作者: Hsiao, Yi-Teng
Wang, Jing-Hui
Wu, Kuan-Ting
Tsai, Jengjan
Chang, Cheng-Hung
Woon, Wei-Yen
物理研究所
Institute of Physics
公開日期: 17-十一月-2014
摘要: Bacterial carpets consist of randomly anchored uni-polar-flagellated sodium-motive bacterial matrix are prepared by flow deposition. Collective flow dynamics across the bacterial carpets are probed with optical tweezers-microsphere assay. Around the center of a uniform bacterial cluster, collective forces that pull microsphere towards carpet surface are detected at a distance of 10 mu m away from carpets. At sodium-motive driving over a critical value, the force magnitudes increase abruptly, suggesting a threshold-like transition of hydrodynamic synchronization across bacterial carpet. The abrupt force increase is explained in term of bifurcation to phase synchronization in a noisy non-linearly coupled rotor array mediated by hydrodynamic interactions. (C) 2014 AIP Publishing LLC.
URI: http://dx.doi.org/10.1063/1.4902111
http://hdl.handle.net/11536/123898
ISSN: 0003-6951
DOI: 10.1063/1.4902111
期刊: APPLIED PHYSICS LETTERS
Volume: 105
Issue: 20
顯示於類別:期刊論文


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