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One box of Girl Scout Cookies worth $15 billion
Date:8/4/2011

sects (a cockroach leg) and even dog feces (compliments of lab manager Dustin James' miniature dachshund, Sid Vicious).

In every case, the researchers were able to make high-quality graphene via carbon deposition on copper foil. In this process, the graphene forms on the opposite side of the foil as solid carbon sources decompose; the other residues are left on the original side. Typically, this happens in about 15 minutes in a furnace flowing with argon and hydrogen gas and turned up to 1,050 degrees Celsius.

Tour expects the cost of graphene to drop quickly as commercial interests develop methods to manufacture it in bulk. Another new paper by Tour and his Rice colleagues described a long-sought way to make graphene-based transparent electrodes by combining graphene with a fine aluminum mesh. The material may replace expensive indium tin oxide as a basic element in flat-panel and touch-screen displays, solar cells and LED lighting.

The experiment the Girl Scouts witnessed "has a lot to do with current research topics in academia and in industry," said Tour, Rice's T.T. and W.F. Chao Chair in Chemistry as well as a professor of mechanical engineering and materials science and of computer science. "They learned that carbon -- or any element -- in one form can be inexpensive and in another form can be very expensive."

Diamonds are a good example, he said. "You could probably get a very large diamond out of a box of Girl Scout Cookies."


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Contact: David Ruth
druth@rice.edu
713-348-6327
Rice University
Source:Eurekalert

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