Carbon Nanotube FET Sensor

Schematic of a carbon nanotube FET sensor functionalized with an antibody to a Lyme disease biomarker protein.  The insulating substrate is shown in pink.  When antigen molecules bind to the antibody, the electrical characteristics of the FET are altered.

From the lab of Prof. Charlie Johnson.

Majorana Fermions, Topological Insulators and Superconductors

Magnetic diffraction pattern for a Josephson junction with a topological insulator weak link. Building on a theoretical description published in 2008 by Prof. Charles Kane and Liang Fu at Penn, Stanford researchers believe the unusual behavior is explained in terms of Majorana fermions.

MUSTANG - a Penn Radio Telescope Array

Penn,the National Institute of Standards and Technology, NASA's Goddard Space Flight Center, and the National Radio Astronomy Observatory, have built a 3 millimeter array of 8x8 TES detectors for the Green Bank Telescope (GBT).


Dark Excitons

Excitons are electrically neutral excited states of a material consisting of a bound state of an electron and a hole.  Prof. Jay Kikkawa explores previously unseen "dark exciton" states in carbon nanotubes and shows their dependence on geometry of the nanotube.


DNA-Carbon Nanotube Hybrid

Single-stranded DNA and carbon nanotubes are chemically compatible and readily self-assemble into DNA-carbon nanotube hybrids (pictured here).  These materials have applications in nanoelectronics, medicine, environmental safety and homeland security.  Dr. Robert R. Johnson of the University of Pennsylvania has used computer simulation to study the structure of these nanomaterials.