Dark Energy Studies

Professor Masao Sako uses Type Ia supernovae to study the expansion history of the universe.  The graphs show (left and middle) Hubble diagrams from a simulated 5-year Type Ia sample from the Dark Energy Survey.  The right graph shows the 95% confidence limits on dark energy parameters.

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.

 

Blinking Semiconducting Nanorods

Several clusters of semiconducting nanorods are being illuminated by blue light. The nanorods absorb blue light, become excited and emit red light. The emission of light by individual nanorods occurs in a random fashion with the nanorod turning "on" and "off" for variable lengths of time.

 

Jamming and the Glass Transition

Professor Andrea Liu's group studies the theory of jamming - the phenomenon wherein a system that normally flows much like a liquid (as with foams) become solid-like when subjected to shear stress.

 

Dark Energy Survey Camera

The focal plane of the DEcam - the camera for the Dark Energy Survey.

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