49 citations · 127 across the 8 of their papers we have counts for
8 papers
Trapping and Scattering of a Multiflagellated Bacterium by a Hard Surface
Alexander P Petroff, Schuyler McDonough
Thiovulum majus, which is one of the fastest known bacteria, swims using hundreds of flagella. Unlike typical pusher cells, which swim in circular paths over hard surfaces, a T. ma…
Closed ecosystems extract energy through self-organized nutrient cycles
Akshit Goyal, Avi I. Flamholz, Alexander P. Petroff +1
Our planet is roughly closed to matter, but open to energy input from the sun. However, to harness this energy, organisms must transform matter from one chemical (redox) state to a…
Density Mediated Spin Correlations Drive Edge to Bulk Flow Transition in Active Chiral Matter
Alexander P. Petroff, Christopher Whittington, Arshad Kudrolli
We demonstrate that edge currents develop in active chiral matter -- composed of spinning disk-shaped grains with chirally arranged tilted legs confined in a circular vibrating cha…
Unstable invasion of sedimenting granular suspensions
Arshad Kudrolli, Rausan Jewel, Ram Sudhir Sharma +1
We investigate the development of mobility inversion and fingering when a granular suspension is injected radially between horizontal parallel plates of a cell filled with a miscib…
Localization and dynamics of sulfur-oxidizing microbes in natural sediment
Alexander Petroff, Frank Tejera, Albert Libchaber
Organic material in anoxic sediment represents a globally significant carbon reservoir that acts to stabilize Earth's atmospheric composition. The dynamics by which microbes organi…
Shape and dynamics of seepage erosion in a horizontal granular bed
Michael Berhanu, Alexander Petroff, Olivier Devauchelle +2
We investigate erosion patterns observed in a horizontal granular bed resulting from seepage of water motivated by observation of beach rills and channel growth in larger scale lan…