Graphene is a 2-D monoatomic layer of carbon atoms arranged in a hexagonal lattice. It is the building block of carbon allotrope, graphene is a remarkable substance on its own - with a multitude of astonishing properties which repeatedly earn it the title “Wonder material”. Graphene has emerged as an exotic material of the 21st century and received worldwide attention due to its exceptional electrical, optical, thermal, and mechanical properties. Graphene has high electron mobility at room temperature (250,000 cm2/Vs) exceptional thermal conductivity (5000 W/mK) and superior mechanical properties with Young’s modulus of 1TPa. There are two approaches to producing graphene. Common Top-down approaches are exfoliation and reduction, while Bottom-up approaches include chemical vapour deposition, epitaxial growth, and pyrolysis.
There are various forms of Graphene used in different applications.
• Single / Monolayer Graphene (Bottom-Up Method)
• Few / Multilayer Graphene (generally produced by Top-down approach)
• Graphene Oxide (GO) & Reduced Graphene Oxide (rGO)(Top-down approach)