Sneaky Superconductivity

The electrical conductivity of a sheet of graphene under a magnetic field is depicted by the colors in these two images. As the magnetic field increases from the bottom to the top of the image, the conductivity decreases (brighter colors). Superconductivity should only exist at low magnetic fields, as seen in the left panel.

Golden Swirls Sort Cells

Treatments for devastating diseases like cancer and HIV sometimes begin with a single cell. These gold spirals, each thinner than a human hair, are part of a cell-sorting microchip developed by Benjamin Yellen’s team at the Pratt School of Engineering. When an electric field is applied, each spiral acts as a miniature antenna, producing electric forces that exert precise control on biological cells.


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