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Subject: Scientists make tiniest transistor from carbon Author: Betty [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 00:34:28 09/06/05 Tue NRI scientists make tiniest transistor San Francisco, Sept 5: Two non-resident Indian scientists have created history by making the world's tiniest transistor entirely from carbon nanotubes. Nanotubes are rolled up sheets of carbon atoms and are more than a thousand times thinner than human hair. The discovery heralds a new era of ultra miniature electronics where standard silicon transistors are replaced with much smaller versions fashioned from carbon nanotubes. The new transistor is a Y-shaped nanotube with two branches that meet a central stem at a junction. Current flowing from one branch to another can be switched on and off by applying a voltage to the third. Such binary logic called "gating" is the basis of nearly all transistors. "The small size and dramatic switching behaviour of these Y-shaped nanotubes makes them candidates for a new class of all-carbon transistor," says Prabhakar Bandaru, a materials scientist at the University of California, San Diego who led the team that included his colleagues Sungho Jin, graduate student Chiara Daraio and physicist Apparao M Rao at Clemson University in South Carolina. Their work published in the September issue of 'Nature Materials' has won instant acclaim from international science community. [ Next Thread | Previous Thread | Next Message | Previous Message ]