Sunday, April 6, 2008
Graphene with Low Intrinsic Resistance Could be the New Silicon
Research results from University of Maryland physicists show that graphene, a new material that combines aspects of semiconductors and metals, could be a leading candidate to replace silicon in applications ranging from high-speed computer chips to biochemical sensors.
The research, funded by the National Science Foundation (NSF) and published online in the journal Nature Nanotechnolgy, reveals that graphene conducts electricity at room temperature with less intrinsic resistance than any other known material.
Intrinsic resistance results from the unavoidable lattice vibrations in a material when the temperature is greater than absolute zero. The intrinsic resistance determines a material's mobility, or the speed at which an electrons move when an electric field is applied to the material. The very high mobility of graphene makes it promising for applications in which transistors must switch extremely fast, such as in the processing of extremely high frequency signals
Graphene is also a very promising material for chemical and biochemical sensing applications in which an electrical signal from, for instance, a molecule adsorbed on the sensing device, is translated into an electrical signal by changing the conductivity of the device
More from here
The research, funded by the National Science Foundation (NSF) and published online in the journal Nature Nanotechnolgy, reveals that graphene conducts electricity at room temperature with less intrinsic resistance than any other known material.
Intrinsic resistance results from the unavoidable lattice vibrations in a material when the temperature is greater than absolute zero. The intrinsic resistance determines a material's mobility, or the speed at which an electrons move when an electric field is applied to the material. The very high mobility of graphene makes it promising for applications in which transistors must switch extremely fast, such as in the processing of extremely high frequency signals
Graphene is also a very promising material for chemical and biochemical sensing applications in which an electrical signal from, for instance, a molecule adsorbed on the sensing device, is translated into an electrical signal by changing the conductivity of the device
More from here
Labels: Material-Sciences, Physics
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