Datta Lab  |  Soft Materials in Complex Environments
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This movie shows our direct imaging of E. coli with fluorescently-labeled flagella (magenta) in a 3D porous medium. Our experiments show that the cell becomes trapped when it encounters an obstruction; however, the flagella continue to rotate as a coherent bundle for much longer than the unconfined run duration. The cell continues to reorient itself while trapped, eventually enabling the flagella to unbundle and re-bundle in a different configuration, which enables the cell to escape its trap and continue to hop through the pore space in a different direction. See this paper for more details. Video not displaying correctly? Watch it here.



This movie shows our direct imaging of E. coli in a 3D porous medium. Our experiments reveal switching between two modes of motion: hopping, in which the cell moves through extended, directed paths through the pore space, and trapping, in which the cell is confined for extended periods of time. See this paper for more details. Video not displaying correctly? Watch it here.



This movie shows our experiments (top row) demonstrating how packings of shrinkable grains either don't crack (left column), crack and self-close (middle column), or crack irreversibly (right column). Our DEM simulations (bottom row) incorporating the physics of bead shrinkage, inter-bead water transport, and inter-bead forces during drying capture the experimental observations. See this paper for more details. Video not displaying correctly? Watch it here.



This movie shows oil (black) displacing water (white) from inside a three-dimensional porous medium (black circles). See this paper for more details. Video not displaying correctly? Watch it here.



This movie shows a close-up of oil (black) displacing water (white) from inside a three-dimensional porous medium (black circles). Notice the intermittent jumps in the motion of the oil! See this paper for more details. Video not displaying correctly? Watch it here.



This movie shows water (white) removing oil (black) from inside a three-dimensional porous medium (black circles). See this paper for more details. Video not displaying correctly? Watch it here.



This movie shows a close-up of water (white) removing oil (black) from inside a three-dimensional porous medium (black circles). See this paper for more details. Video not displaying correctly? Watch it here.



This movie shows solid microcapsules expanding and ultimately rupturing due to electrostatic forces. See this paper for more details. Video not displaying correctly? Watch it here.



This movie shows solid microcapsules buckling, much like ping-pong balls -- except these are a thousandth the size! See this paper for more details. Video not displaying correctly? Watch it here.

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