317 citations · 1.3k across the 13 of their papers we have counts for
13 papers
Bacteria collective motion is scale-free
Benjamin Perez-Estay, Vincent Martinez, Carine Douarche +7
Suspensions of swimming bacteria interact hydrodynamically over long ranges, organizing themselves into collective states that drive large-scale chaotic flows, often referred to as…
Characterization and Control of the Run-and-Tumble Dynamics of {\it Escherichia Coli}
Christina Kurzthaler, Yongfeng Zhao, Nan Zhou +8
We characterize the full spatiotemporal gait of populations of swimming {\it Escherichia coli} using renewal processes to analyze the measurements of intermediate scattering functi…
Quantitative characterization of run-and-tumble statistics in bulk bacterial suspensions
Yongfeng Zhao, Christina Kurzthaler, Nan Zhou +8
We introduce a numerical method to extract the parameters of run-and-tumble dynamics from experimental measurements of the intermediate scattering function. We show that proceeding…
What is the 'minimum inhibitory concentration' (MIC) of pexiganan acting on Escherichia coli? - A cautionary case study
Alys K Jepson, Jana Schwarz-Linek, Lloyd Ryan +2
We measured the minimum inhibitory concentration (MIC) of the antimicrobial peptide pexiganan acting on Escherichia coli, and report an intrinsic variability in such measurements.…
Escherichia coli as a model active colloid: a practical introduction
Jana Schwarz-Linek, Jochen Arlt, Alys Jepson +6
The flagellated bacterium Escherichia coli is increasingly used experimentally as a self-propelled swimmer. To obtain meaningful, quantitative results that are comparable between d…
Flagellated bacterial motility in polymer solutions
Vincent A. Martinez, Jana Schwarz-Linek, Mathias Reufer +3
It is widely believed that the swimming speed, , of many flagellated bacteria is a non-monotonic function of the concentration, , of high-molecular-weight linear polymers in…
Swimming in a Crystal:
Aidan T. Brown, Ioana D. Vladescu, Angela Dawson +4
We study catalytic Janus swimmers and Escherichia coli bacteria swimming in a two-dimensional colloidal crystal. The Janus swimmers orbit individual colloids and hop between colloi…
Filling an emulsion drop with motile bacteria
I. D. Vladescu, E. J. Marsden, J. Schwarz-Linek +6
We have measured the spatial distribution of motile Escherichia coli inside spherical water droplets emulsified in oil. At low cell concentrations, the cell density peaks at the wa…
Switching of swimming modes in Magnetospirillium gryphiswaldense
Mathias Reufer, Rut Besseling, Jana Schwarz-Linek +6
The microaerophilic magnetotactic bacterium Magnetospirillum gryphiswaldense swims along magnetic field lines using a single flagellum at each cell pole. It is believed that this m…
Enhanced diffusion of nonswimmers in a three-dimensional bath of motile bacteria
A. Jepson, V. A. Martinez, J. Schwarz-Linek +2
We show, using differential dynamic microscopy, that the diffusivity of non-motile cells in a three-dimensional (3D) population of motile E. coli is enhanced by an amount proportio…
Phase separation and rotor self-assembly in active particle suspensions
J. Schwarz-Linek, C. Valeriani, A. Cacciuto +4
Adding a non-adsorbing polymer to passive colloids induces an attraction between the particles via the `depletion' mechanism. High enough polymer concentrations lead to phase separ…
Differential Dynamic Microscopy: a High-Throughput Method for Characterizing the Motility of Microorganism
Vincent A. Martinez, Rut Besseling, Ottavio A. Croze +6
We present a fast, high-throughput method for characterizing the motility of microorganisms in 3D based on standard imaging microscopy. Instead of tracking individual cells, we ana…
Differential Dynamic Microscopy of Bacterial Motility
Laurence G. Wilson, Vincent A. Martinez, Jana Schwarz-Linek +4
We demonstrate 'differential dynamic microscopy' (DDM) for the fast, high throughput characterization of the dynamics of active particles. Specifically, we characterize the swimmin…