Y-shaped nanotubes are ready-made transistors
For the first time, a research team led by Hongjie Dai, the J. G. Jackson and C. J. Wood Professor of Chemistry, has made transistors called “field-effect transistors”-a critical component of computer chips-with graphene that can operate at room temperature. Graphene is a form of carbon derived from graphite. Other graphene transistors, made with wider nanoribbons or thin films, require much lower temperatures.
“For graphene transistors, previous demonstrations of field-effect transistors were all done at liquid helium temperature, which is 4 Kelvin [-452 Fahrenheit],” said Dai, the lead investigator. His group’s work is described in a paper published online in the May 23 issue of the journal Physical Review Letters.