Why in news?
Researchers at MIT observed evidence of unconventional superconductivity in magic-angle graphene in November 2025, potentially advancing quantum devices. New methods for growing graphene with deliberate defects aim to boost electronics performance, per January 2026 reports.
About Graphene
Graphene is a single layer of carbon atoms arranged in a hexagonal honeycomb lattice, known for being the strongest, thinnest, and most conductive material ever discovered. It combines extraordinary mechanical, electrical, and thermal properties, making it a revolutionary material in science and technology.
Key facts
- Structure: One atom thick, two-dimensional sheet of carbon atoms bonded via sp² hybridization in a hexagonal lattice.
- Relation to Graphite: Graphite is essentially many layers of graphene stacked together.
- Discovery: First isolated in 2004 by Andre Geim and Konstantin Novoselov, who later won the Nobel Prize in Physics (2010) for their work.
Key Properties
- Strength: Tensile strength ≈ 130 GPa (about 200 times stronger than steel).
- Elasticity: Young’s modulus ≈ 1 TPa, meaning it is extremely stiff yet flexible.
- Conductivity:
- Electrical: Conducts electricity better than copper.
- Thermal: Conductivity ≈ 5300 W/(m·K), among the highest known.
- Transparency: Almost completely transparent, absorbing only ~2% of visible light.
Challenges & Limitations
- Mass Production: Difficult to manufacture defect-free, large sheets at low cost.
- Integration: Incorporating graphene into existing industrial processes remains complex.
- Safety Concerns: Nanoparticles may pose health risks if inhaled or improperly handled.
- Commercialization Gap: Despite hype, widespread consumer applications are still limited.
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