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March 20th, 2008
Nanotechnology makes clean, efficient conductor
Abstract:
By crushing a widely used semiconductor into nanoparticles, researchers said on Thursday they have created a compound that could lead to cleaner, more efficient refrigerators, solar power plants and other devices.
The crushed material makes it possible to conduct electricity without conducting so much heat, solving a problem that has baffled engineers for 50 years.
Writing in the journal Science, the teams at the Massachusetts Institute of Technology and Boston College said their method provides a cheap way to achieve a major increase in thermoelectric efficiency.
"It conducts 40 percent less heat," Boston College physicist Zhifeng Ren said in a telephone interview.
"In order to achieve that 40 percent less heat conduction you need to have the grains smaller so that you have more blocks to the heat flow."
Source:
uk.reuters.com
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