Graphene
Carbons arranged to a hexagonal network. 2D crystal based. Has 3 fold symmetry. Single sheet of graphite.
Unit Cell
- A rhombus with
. - Lattice parameter (side length of a unit cell)
where is the bond length. - 2 atoms per unit cell.
Synthesis
- Top-down approaches
- Exfoliation (eg: Scotch tape method)
- Bottom-up approaches
- Chemical vapor deposition
Properties
- Band gap is
- High tensile strength (
) - High young’s modulus (
) - High charge carrier mobility (
) - Highly transparent (
)