2D Materials
Kartavya Desk Staff
Source: BS
Context: NITI Aayog’s Frontier Tech Hub, in collaboration with IISc Bengaluru, has released the 4th edition of its Future Front Quarterly Insights titled “Introduction to 2D Materials”, highlighting their significance and why India must prioritise them.
About 2D Materials:
What are 2D Materials?
• Definition: These are super-thin materials, only one atom thick — thinner than anything you can imagine. Example: graphene, MoS₂ (molybdenum disulfide), WS₂.
• Structure: They are flat like a sheet of paper but at the atomic level, giving them special properties that normal (3D) materials don’t have.
• Discovery: In 2004, scientists peeled off graphene from graphite (pencil lead) using tape — this earned them the 2010 Nobel Prize.
• Types: Graphene (made of carbon), TMDCs (metal + sulfur/selenium), hexagonal boron nitride (h-BN), and new materials called “Xenes” like silicene.
How Do They Work?
• Because they’re so thin, electrons can move almost freely → faster and cooler devices.
• They’re held together strongly within a sheet but are weakly stacked, so we can easily separate them into thin layers.
• Their energy properties (band gap) can be adjusted, making them great for chips and electronics.
• Their thinness makes them extremely sensitive to the environment — perfect for sensors.
• They also show quantum effects (like spin–valley coupling) that could power future quantum computers.
Key Characteristics:
• Super Conductors → Graphene carries electricity better than copper and also spreads heat quickly.
• Super Strong → Around 200 times stronger than steel, yet bendable and stretchable by 20%.
• Tunable Chips → Can be engineered for next-generation semiconductors beyond today’s silicon.
• Quantum Ready → Can host quantum bits (qubits) for quantum computing.
• Flexible & Transparent → Ideal for foldable phones, wearable gadgets, and see-through electronics.
Applications:
• Semiconductors – 2D transistors (MoS₂, WS₂) break silicon limits; extend Moore’s Law to the angstrom era.
• Neuromorphic Computing – Atom-thin memristors mimic brain synapses; energy-efficient AI hardware.
• Optoelectronics – Tunable band gaps enable ultra-thin photodetectors, LEDs, and solar cells.
• Bulk Uses – Graphene composites for aerospace, water filtration membranes, coatings, batteries, and EV supercapacitors.