Wednesday, October 20, 2010

Graphene amplifiers to increase wireless chip efficiency - Hardware - Technology - News - iTnews.com.au

Graphene amplifiers to increase wireless chip efficiency - Hardware - Technology - News - iTnews.com.au

Triple-mode transistors built from one-atom-thick carbon.

US researchers have built and tested a graphene amplifier that could improve future Bluetooth, radiofrequency identification (RFID) and other wireless devices.
The team claimed to be the first to demonstrate a triple-mode, single-transistor amplifier that was based on graphene and had greater functionality than conventional semiconductor devices.

Graphene is a one-atom-thick sheet of carbon that conducts electricity 100 times faster than silicon and won its discoverers a Nobel Prize in Physics this year.
The amplifier exploited the graphene's ambipolar nature - its ability to reactively use either negative or positive electric carriers, depending on the input signal.