Graphene is a single layer of carbon atoms arranged in a honeycomb lattice. It has extraordinary electronic and photonic properties, including high electron mobility, transparency, flexibility, and strength. In 2004, Geim and Novoselov at the University of Manchester first isolated graphene from graphite using mechanical exfoliation. Due to its unique properties, graphene has applications in electronics, energy storage, water purification, and more. It shows promise for use in transparent and flexible electronics, solar panels, batteries, and other technologies.