ArticleProceedings of the National Academy of Sciences of the United States of America2023
Decoding the hydrodynamic properties of microscale helical propellers from Brownian fluctuations.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 5 citations in OpenAlex.
- Image processing tools for petabyte-scale light sheet microscopy data.Nature methods · 2024Article
- Model based optimization for refractive index mismatched light sheet imaging.Optics express · 2024Article
- Decoding the hydrodynamic properties of microscale helical propellers from Brownian fluctuations.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
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9 authors at 2 institutions in 1 country.
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Abstract
The complex motility of bacteria, ranging from single-swimmer behaviors such as chemotaxis to collective dynamics, including biofilm formation and active matter phenomena, is driven by their microscale propellers. Despite extensive study of swimming flagellated bacteria, the hydrodynamic properties of their helical-shaped propellers have never been directly measured. The primary challenges to directly studying microscale propellers are 1) their small size and fast, correlated motion, 2) the necessity of controlling fluid flow at the microscale, and 3) isolating the influence of a single propeller from a propeller bundle. To solve the outstanding problem of characterizing the hydrodynamic properties of these propellers, we adopt a dual statistical viewpoint that connects to the hydrodynamics through the fluctuation-dissipation theorem (FDT). We regard the propellers as colloidal particles and characterize their Brownian fluctuations, described by 21 diffusion coefficients for translation, rotation, and correlated translation-rotation in a static fluid. To perform this measurement, we applied recent advances in high-resolution oblique plane microscopy to generate high-speed volumetric movies of fluorophore-labeled, freely diffusing
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