Graphene transistors have a nanoscale cooling effect
April 4, 2011
Graphene Contact
An atomic force microscope tip scans the surface of a graphene-metal contact to measure temperature (credit: Alex Jerez, Beckman Institute for Advanced Science and Technology)
Researchers at the University of Illinois have found that graphene transistors have a nanoscale cooling effect that reduces their temperature.
The Illinois team used an atomic force microscope (AFM) tip as a temperature probe to make the first nanometer-scale temperature measurements of a working graphene transistor.
They found that thermoelectric cooling effects can be stronger at graphene contacts than resistive heating, actually lowering the temperature of the transistor. This self-cooling effect means that graphene-based electronics (built using carbon sheets one atom thick) could require little or no cooling, providing greater energy efficiency and increasing graphene’s attractiveness as a silicon replacement.
This also means that future computer chips made from graphene could be faster than silicon chips and operate at lower power.
April 4, 2011
Graphene Contact
An atomic force microscope tip scans the surface of a graphene-metal contact to measure temperature (credit: Alex Jerez, Beckman Institute for Advanced Science and Technology)
Researchers at the University of Illinois have found that graphene transistors have a nanoscale cooling effect that reduces their temperature.
The Illinois team used an atomic force microscope (AFM) tip as a temperature probe to make the first nanometer-scale temperature measurements of a working graphene transistor.
They found that thermoelectric cooling effects can be stronger at graphene contacts than resistive heating, actually lowering the temperature of the transistor. This self-cooling effect means that graphene-based electronics (built using carbon sheets one atom thick) could require little or no cooling, providing greater energy efficiency and increasing graphene’s attractiveness as a silicon replacement.
This also means that future computer chips made from graphene could be faster than silicon chips and operate at lower power.
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