Graphene is frequently in 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 by 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 ?

Graphene is a two-dimensional material consisting of a single layer of carbon atoms arranged in a hexagonal honeycomb lattice [2]. It is recognized as the thinnest material known, with a thickness of approximately 0.335 nm, yet it possesses exceptional mechanical strength, being significantly stronger than steel [2]. Statement 3 is incorrect because graphene is an allotrope of carbon, not silicon [2]. Its unique properties include high electrical conductivity due to delocalized pi electrons and high optical transparency, transmitting about 97% of visible light [2]. These characteristics make it an ideal candidate for use as transparent conducting electrodes in electronic devices such as touch screens, LCDs, and organic LEDs (OLEDs), where both conductivity and transparency are essential.

Sources

1. [2] https://pmc.ncbi.nlm.nih.gov/articles/PMC9568937/
2. [1] https://www.sciencedirect.com/science/article/pii/S2211715621000680