Science & Technology
Nanotechnology and New Materials
GS Paper III
Nanotechnology and New Materials — Quick Revision
One-page UPSC revision of nanotechnology and new materials: nanoscale effects, carbon nanomaterials, Nobel milestones, smart materials and risks.
SyllabusGS III · Awareness in the fields of nano-technology and new materials; their applications in everyday life
A last-week revision sheet for nanotechnology and new materials. Learn each material by one defining property.
Nanoscale in One Table
| Concept | Key point |
|---|---|
| Scale | 1–100 nm; 1 nm = one-billionth of a metre |
| Surface effect | Higher surface-area-to-volume ratio → more reactive |
| Quantum confinement | Size changes optical and electrical behaviour |
| Top-down | Carving bulk material (lithography, milling) |
| Bottom-up | Building from atoms (chemical vapour deposition, self-assembly) |
| Imaging tools | Scanning tunnelling microscope (1981), atomic force microscope |
Materials and Their Defining Property
| Material | Defining property | Use |
|---|---|---|
| Fullerene (C₆₀) | Hollow carbon cage | Drug delivery research |
| Carbon nanotube | Rolled carbon sheet; very high strength | Composites, sensors |
| Graphene | One-atom-thick carbon sheet; conductive, strong, transparent | Flexible electronics, membranes |
| Quantum dot | Colour depends on size | QLED displays, bio-imaging |
| Aerogel | Ultra-light, porous | Insulation |
| Metamaterial | Engineered properties absent in nature | Antennas, cloaking research |
| Nitinol (Ni–Ti) | Shape memory | Stents, actuators |
| Quartz (piezoelectric) | Pressure ↔ voltage | Gas lighters, watches |
| Photochromic glass | Darkens in sunlight | Spectacle lenses |
| Superconductor | Zero resistance; Meissner effect | MRI, maglev |
| Perovskite | Efficient light absorption, cheap | Solar cells |
Nobel Milestones
| Year | Prize | For |
|---|---|---|
| 1986 | Physics | Scanning tunnelling microscope |
| 1996 | Chemistry | Fullerenes |
| 2010 | Physics | Graphene |
| 2023 | Chemistry | Quantum dots |
High-yield facts
- Nano Mission (DST) — 2007.
- Guidelines — nanopharmaceuticals (2019); nano agri-inputs and food products (2020).
- IFFCO Nano Urea (liquid) — 2021; Nano DAP — 2023.
- 30 critical minerals identified by the Ministry of Mines (2023); National Critical Mineral Mission approved January 2025.
- Lipid nanoparticles are the delivery vehicle of mRNA vaccines.
Traps
Watch these
- Graphene is carbon, not silicon; graphite = stacked graphene.
- Nanoparticles have a higher, not lower, surface area per unit volume.
- No confirmed room-temperature, ambient-pressure superconductor exists.
- Gold nanoparticles look red or purple, not gold.
Related Topics
- Nanotechnology and Advanced Materials
- Nanotechnology — practice questions
- Nanotechnology and New Materials — overview
- Biotechnology and Health
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