Technology update
Dec 10, 2007
Graphene bilayer acquires variable gap
An international team of physicists has created the first semiconductor material in which the width of the energy gap between the valence and conduction bands can be changed by simply applying an external voltage. The team claims that the semiconductor could be used to make lasers, transistors and other devices with properties that could be much more easily tuned than devices based on traditional semiconductors such as silicon.
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