Washington, Jan 10 (ANI): Scientists found that graphene conducts heat about 20 times faster than silicon, which is used in most modern technology as a semiconductor material.
The finding by UT Dallas engineers could lead to more-efficient cooling of electronics, producing quieter and longer-lasting computers, and cellphones and other devices.
"Heat is generated every time a device computes," said Dr. Kyeongjae 'KJ' Cho, associate professor of materials science and engineering and physics at UT Dallas and one of the study's authors.
"For example a laptop fan pumps heat out of the system, but heat removal starts with a chip on the inside. Engineered graphene could be used to remove heat - fast," he stated.
As electronics become more complex and decrease in size, the challenge to remove heat from the core becomes more difficult, Cho said. Desktop and laptop computers have fans. Smaller electronic devices such as cellphones have other thermoelectric cooling devices.
"The performance of an electronic device degrades as it heats up, and if it continues the device fails," said Cho, also a visiting professor at Seoul National University in South Korea.
"The faster heat is removed, the more efficient the device runs and the longer it lasts," he explained.
For the new study, researchers at UT Austin conducted an experiment about graphene's heat transfer. They used a laser beam to heat the center of a portion of graphene, and then measured the temperature difference from the middle of the graphene to the edge.
"We refined our modeling work taking into account their experimental conditions and found we have quantitative agreement," Cho said.
"By understanding how heat transfers through a two-dimensional graphene system, we can further manipulate its use in semiconductor devices used in everyday life," he added.
The study was published in the journal Nature Materials. (ANI)
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