Harnessing quantum properties to create single-molecule
devices

Researchers, led by Columbia Engineering Professor
Latha Venkataraman, report today that they have discovered a new
chemical design principle for exploiting destructive quantum
interference. They used their approach to create a six-nanometer
single-molecule switch where the on-state current is more than
10,000 times greater than the off-state current—the largest change
in current achieved for a single-molecule circuit to
date.