Definition of graphene

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Photonics Dictionary

graphene: Graphene is a two-dimensional allotrope of carbon consisting of a single layer of carbon atoms arranged in a hexagonal lattice pattern. It is the basic building block of other carbon-based materials such as graphite, carbon nanotubes, and fullerenes (e.g., buckyballs). Graphene has garnered significant attention due to its remarkable properties, making it one of the most studied materials in the field of nanotechnology.

Key properties of graphene include:

Two-dimensional structure: Graphene is a single layer of carbon atoms arranged in a flat, hexagonal lattice structure. Its two-dimensional nature gives it unique electronic, mechanical, and optical properties.

Exceptional strength: Graphene has a tensile strength over 100 times greater than steel, making it one of the strongest materials known. Its exceptional strength arises from the covalent bonding between carbon atoms within the hexagonal lattice.

High electrical conductivity: Graphene exhibits excellent electrical conductivity, with electrons able to move through the material at extremely high speeds due to its unique electronic band structure. This property makes graphene promising for applications in electronics, such as high-speed transistors and flexible conductive films.

High thermal conductivity: Graphene also demonstrates high thermal conductivity, enabling efficient heat transfer through the material. This property has potential applications in thermal management systems, such as heat sinks and thermal interface materials.

Transparency: Despite its atomic thickness, graphene is optically transparent, allowing light to pass through with minimal absorption. This property makes it useful for applications such as transparent conductive coatings for touchscreens and solar cells.

Flexibility: Graphene is highly flexible and can be bent, stretched, and folded without losing its structural integrity. This flexibility opens up possibilities for applications in flexible electronics, wearable devices, and composite materials.