Nanotechnology and New Materials
Nanotechnology and new materials for UPSC — nanoscale effects, graphene, nanotubes, quantum dots, smart materials, superconductors and regulation.
SyllabusGS III · Awareness in the fields of nano-technology and new materials; their applications in everyday life
Materials science rarely makes headlines on its own, but it sits behind almost every technology in the news — chips, batteries, solar cells, vaccines and fertilisers. Prelims asks what makes the nanoscale special, what graphene or a quantum dot is, and which material has which property (shape-memory, piezoelectric, superconducting). Mains GS III asks how nanotechnology can serve health, agriculture, water and energy, and how India should regulate its risks.
Key sub-topics in this chapter
| Sub-topic | What to know |
|---|---|
| Nanoscale basics | 1–100 nm; surface-area-to-volume ratio; quantum effects; top-down vs bottom-up |
| Carbon nanomaterials | Fullerenes, carbon nanotubes, graphene |
| Quantum dots | Size-dependent colour; Nobel Prize in Chemistry 2023 |
| Applications | Drug delivery, diagnostics, water purification, nano-fertilisers, energy |
| New materials | Aerogels, metamaterials, shape-memory alloys, piezoelectrics, superconductors, perovskites |
| Policy and risk | Nano Mission (2007), nano-product guidelines, nanotoxicity, critical minerals |
Read the topic note first, then revise and practise.