Collective flow dynamics across a bacterial carpet: Understanding the forces generated

Yi Teng Hsiao, Jing Hui Wang, Kuan Ting Wu, Jengjan Tsai, Cheng-Hung Chang, Wei Yen Woon*

*此作品的通信作者

    研究成果: Article同行評審

    5 引文 斯高帕斯(Scopus)

    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 lm 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 nonlinearly coupled rotor array mediated by hydrodynamic interactions.

    原文English
    文章編號203702
    期刊Applied Physics Letters
    105
    發行號20
    DOIs
    出版狀態Published - 17 十一月 2014

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