Professor Alison Sweeney studies bio-optical properties of cephalopods and the cellular and biochemical mechanisms of dynamic camouflage.




Microfluidic channel in place for video microscopy.

Right: Schematic of microchannel, and example velocity profiles superposed on an actual image of the colloidal NIPA suspension.

From the labs of Profs. Doug Durian and Jerry Golub


Air-fluidized grains

Spatiotemporal heterogenous dynamics in air-fluidized grains near jamming. The colors represent the average speed over a time interval large enough for grain-sized rms displacement. The most mobile grains are in red, the least are in blue, across the rainbow. Note the stringy correlations of the mobile grains in red. From the lab of Prof. Doug Durian.

Molecular Electronics

A synthetic peptide candidate that can be used for single molecule electronic measurements.  Single molecules can act as a functioning part of a field effect transistor device as studied in Professor Charlie Johnson's lab.


DNA through a Solid State Nanopore

Dr. Meni Wanunu, Dr. Marija Drndic and others at the University of Pennsylvania have threaded DNA through solid state nanopores in order to gain information about chemically modified DNA. The image depicts chemically modified DNA translocating through a nanoscale pore in silicon nitride.