 Bilayer Graphene Gets a Bandgap Print   Graphene is the two-
dimensional crystalline form of carbon whose extraordinary
electron mobility and other unique features hold great promise
for nanoscale electronics and photonics. But without a bandgap,
graphene's promise can't be realized. As with monolayer
graphene, bilayer graphene also has a zero bandgap and thus
behaves like a metal. But a bandgap can be introduced if an
electric displacement field is applied to the two layers; the
material then behaves like a semiconductor. A team of
researchers from Berkeley has engineered a bandgap in bilayer
graphene that can be precisely controlled from 0 to 250 meV.
With precision control of its bandgap over a wide range, plus
independent manipulation of its electronic states through
electrical doping, dual-gated bilayer graphene becomes a
remarkably flexible tool for nanoscale electronic devices.
Directing Traffic on the Electron Superhighway  Schematic
depictions of graphene crystal structure (lattices), conduction
ban