Graphene has been frequently in the news recently. What is its importance?1. It is a two-dimensional material and has good electrical conductivity.2. It is one of the thinnest but strongest materials tested so far.3. It is entirely made of silicon and has high optical transparency.4. It can be used as ‘conducting electrodes’ required for touch screens, LCDs and organic LEDs.Which of the statements given above are correct?
✓ Correct answer: c) 1, 2 and 4 only
ExplanationGraphene is a single layer of carbon atoms arranged in a hexagonal honeycomb lattice, making it the thinnest, strongest, and most conductive material known.It has remarkable applications in electronics, energy storage, and nanotechnology due to its high strength, flexibility, and conductivity.Statement 1 is correct: Graphene, a two-dimensional, atomic- scale, honey-comb lattice is an allotrope of carbon in which one atom forms each vertex.It is the basic structural unit of other allotropes, including graphite, charcoal, carbon nanotubes and fullerenes.Graphene has remarkably good electrical conductivity.Statement 2 is correct: It is often cited as about 100 times stronger than the strongest steel with a hypothetical thickness of 3.35Å(approx.) which is equal to the thickness of a graphene sheet.Carbon atoms are linked together in a single layer to form the hexagonal structure that makes up graphene.Graphene is so much thinner than paper (a million times thinner), that it is actually regarded as two dimensional.Statement 3 is incorrect: Graphene is a single layer (monolayer) o
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