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A University of California - Riverside research team lead by professor Alexander A. Balandin of the department of electrical engineering working in collaboration with assistant professor Chun Ning Lau of the department of physics and astronomy discovered that graphene, a single plane layer of carbon atoms arranged in honey-comb lattice, manifests extremely high thermal conductivity exceeding that of diamond and carbon nanotubes. The superb heat conducting properties of graphene can be used for hot-spot cooling and thermal management of the nanometer scale electroniccircuits and optoelectronic devices.
Graphene is a recently discovered form of carbon, which consists of only
one layer of atoms arranged in a honey-comb lattice. It manifests a
number of intriguing properties. For example, electrons in graphene behave
like they are massless. An extraordinary high mobility of electrons in
graphene makes graphene a promising material for future ultra-fast
The University of California - Riverside (UCR) team led by electrical
engineering professor Balandin has recently discovered that
graphene is also a superior heat conductor. Its thermal conductivity
is several times larger than that of diamond - the best known bulk crystal
heat conductor and exceeds that of carbon nanotubes, which were -
up until now - beleived to be the best heat conductors amond all solid
The near room-temperature thermal conductivity of a single layer graphene
suspended across a trench in silicon wafer was measured to be up to 5300
W/mK. The measurement of the thermal conductivity of graphene, an object of just
one atom thick, required a development of completely new experimental method.
The measurements were performed with the help of the non-contact optical
technique based on the micro-Raman spectroscopy.
The superb thermal conductivity of graphene coupled with its plane
geometry and demonstrated integration with silicon make graphene
and graphene multi-layers promissing materials for
thermal management of the nanometer scale electronic circuits.
The discovery of the UCR team was reported this week in Nano Letters
[link to the paper is here:
For more information, visit Professor Balandin's Nano-Device Laboratory
web-site at ndl.ee.ucr.edu/
For more information, please click here
Alexander A. Balandin, PhD
Professor, Department of Electrical Engineering
Chair, Materials Science and Engineering Program
Director, Nano-Device Laboratory
University of California - Riverside
Riverside, CA 92521 USA
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