What do you understand by nanotechnology and how is it helping in health sector?
Approach · directive: “what / how”
What it asks · Define nanotechnology, then show its applications in diagnosis, drug delivery, treatment and public health, with a word on risks.
The question has 2 parts — answer each
- Explain what nanotechnology is
- Show how nanotechnology is helping the health sector
Open with · Nanotechnology works with matter at the scale of roughly 1 to 100 nanometres, where materials show special optical, chemical and biological properties.
Cover
- Concept: engineering atoms and molecules at the nanoscale (a nanometre is a billionth of a metre) to make particles, materials and devices with new properties.
- Drug delivery: nanoparticles and liposomes carry a drug to the target tissue, as in cancer therapy, raising effect and cutting side effects.
- Diagnostics and imaging: nano-biosensors, quantum dots and contrast agents help detect disease early; lab-on-chip devices support low-cost point-of-care tests.
- Treatment and repair: nano-scaffolds for tissue engineering, nano-coatings for implants, and silver nanoparticles as antimicrobial agents in wound care.
- Vaccines: lipid nanoparticles are the carriers in mRNA COVID-19 vaccines, showing how nanotechnology can serve public health at scale.
- India: the Nano Mission of the Department of Science and Technology (2007) funds research, and low-cost nano-based diagnostics and drug carriers are being developed.
- Concerns: nanotoxicity and unknown long-term effects, accumulation in the body and environment, and thin regulation, which call for safety testing and clear norms.
Close with · Nanotechnology can make diagnosis earlier and treatment more targeted, provided safety testing and regulation keep pace with the science.
Question: UPSC's CS (Main) 2020, GS Paper III — paper ↗. Approach: Minimalist IAS, checked 30 Sept 2026 (how we verify) — UPSC publishes no model answers. ·
Model answer · 207 words (UPSC limit 150) · Minimalist IAS
Nanotechnology is the engineering of matter at the scale of roughly 1 to 100 nanometres (a nanometre is a billionth of a metre), where materials show optical, chemical and biological properties they lack in bulk.
What nanotechnology is
- It builds particles, materials and devices atom by atom or molecule by molecule; at this scale surface area rises sharply and quantum effects appear, giving new strength, reactivity and conductivity.
- India's Nano Mission of the Department of Science and Technology (2007) funds research and infrastructure in the field.
Uses in the health sector
- Targeted drug delivery: nanoparticles and liposomes carry a drug to diseased tissue, as in cancer therapy, raising effect and cutting side effects.
- Diagnostics and imaging: nano-biosensors, quantum dots and contrast agents detect disease early; lab-on-chip devices enable low-cost point-of-care tests.
- Vaccines: lipid nanoparticles carry the mRNA in COVID-19 vaccines, showing nanotechnology serving public health at scale.
- Treatment and repair: nano-scaffolds for tissue engineering, nano-coatings for implants, and silver nanoparticles as antimicrobial agents in wound care.
Concerns
- Nanotoxicity and unknown long-term effects, accumulation in the body and environment, and thin regulation call for safety testing and clear norms.
Nanotechnology can make diagnosis earlier and treatment more precise, provided safety testing and regulation keep pace with the science.
Written by Minimalist IAS from facts checked at source (how we verify) — a little fuller than exam length, so every part of the question is covered; in the hall, keep the structure and trim the detail. UPSC publishes no model answers: compare your structure and coverage with this, then write your own.