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Laser Induces Conduction in Graphene

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COLLEGE PARK, Md., June 20, 2011 — By illuminating graphene with a mid-infrared laser, researchers now can open an observable bandgap in the otherwise gapless material, enabling it to become a semiconductor. Graphene is the thinnest and strongest material ever discovered. It is a layer of carbon atoms only 1 atom thick, but 200 times stronger than steel. It also conducts electricity extremely well and heat better than any other known material. It is almost completely transparent, yet so dense that not even atoms of helium can penetrate it. Despite the impressive list of promising prospects, however, graphene appears to...Read full article

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    Published: June 2011
    Glossary
    bandgap
    In semiconductor physics, the term bandgap refers to the energy range in a material where no electronic states are allowed. It represents the energy difference between the valence band, which is the highest range of energy levels occupied by electrons in their ground state, and the conduction band, which is the lowest range of unoccupied energy levels. The bandgap is a crucial parameter in understanding the electrical behavior of semiconductors and insulators. Here are the key components...
    AmericasArgentinabandgapCatalan Institute of NanotechnologyCONICETEuropeGermanygrapheneLuis Foa TorresMarylandmid-infrared laserNational University of CórdobaOpticsoptoelectronic devicesResearch & TechnologyRWTH Aachen UniversitysemiconductorsSpaintopological insulatorsLasers

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