The physicist Richard Feynman first put forward the idea behind nanotechnology in a lecture at Caltech on 29 December 1959, There’s Plenty of Room at the Bottom. Nanotechnology refers to the study, manipulation and application of materials and structures at the nanoscale, generally around 1–100 nanometres (a nanometre is one-billionth of a metre). The word “nanotechnology” itself was coined by the Japanese scientist Norio Taniguchi in 1974.
At this scale, materials can exhibit distinctive physical, chemical, electrical and optical properties. These properties create opportunities for innovation in healthcare, agriculture, electronics, energy, environmental protection, defence and space exploration.
Nanotechnology is increasingly important for scientific research and industrial development. Its integration with artificial intelligence and biotechnology can help address developmental challenges, although safety, environmental and ethical concerns require careful management.
Classification of Nanomaterials
Nanomaterials can be classified according to their composition and structure. They are usually grouped into four categories.
1. Inorganic-Based Nanomaterials
These include metal and metal-oxide nanoparticles. Many are stable and some are biocompatible, which makes them useful in specialised applications.
Applications:
- Biomedicine
- Catalysis
- Sensors
Their properties can be adapted for applications such as diagnostic devices and chemical processes.
2. Organic-Based Nanomaterials
Organic nanomaterials include liposomes, layered biopolymers, dendrimers and protein aggregates.
Depending on their composition, they may offer biodegradability and biocompatibility.
Applications:
- Targeted drug delivery
- Food science
- Biomedical research
They are particularly useful when materials need to interact with biological systems.
3. Carbon-Based Nanomaterials
Carbon-based nanomaterials include graphene, fullerenes and carbon nanotubes. Their properties can include high electrical conductivity, mechanical strength and distinctive optical characteristics.
Applications:
- Electronics
- Sensors
- Drug delivery
- Composites and coatings
4. Composite-Based Nanomaterials
Composite nanomaterials combine two or more materials to obtain enhanced or specialised properties, such as flexibility, strength, electrical conductivity or heat resistance.
Examples include carbon-nanotube–quantum-dot hybrids and graphene–polymer composites.
Applications:
- Energy storage
- Structural reinforcement
- Advanced coatings
Important Nanomaterials
1. Carbon Nanotubes
Carbon nanotubes are cylindrical structures made from carbon atoms. They belong to the fullerene structural family and have a very high strength-to-weight ratio.
Applications: Advanced composites, electronics, coatings and other lightweight, high-performance materials.
2. Graphene
Graphene is a two-dimensional network of carbon atoms arranged in a hexagonal structure. It is known for its high strength, electrical conductivity and thermal properties.
It can be produced from graphite and has potential uses in desalination, optoelectronics and liquid-crystal displays.
Applications:
- Water filtration and desalination
- Optoelectronics
- Sensors
- Flexible electronic devices
3. Quantum Dots
Quantum dots are semiconductor nanoparticles whose optical properties depend partly on their size. They are sometimes described as “artificial atoms” because of their distinctive electronic and optical behaviour.
Quantum dots can emit different colours of light and are useful in applications requiring controlled optical signals.
Applications:
- Display technology
- Cancer imaging and research
- Drug delivery
- Biomedical applications
Applications of Nanotechnology
Its applications span eight major sectors.
1. Agriculture
Nanotechnology can support precision agriculture, improve the efficiency of agricultural inputs and help monitor crop and soil conditions.
Nano-fertilisers
Nano-fertilisers are designed to improve the delivery or efficiency of nutrients. Examples include IFFCO’s Nano Urea (approved in 2021) and its Nano Zinc and Nano Copper liquids (approved in 2024). In March 2026 the government notified 14 nano fertilisers under the Fertiliser Control Order, requiring at least half their particles to be smaller than 100 nanometres.
Potential benefits include improved nutrient-use efficiency and reduced losses when products are appropriately formulated and applied. Field results are mixed, however: a 2024 Punjab Agricultural University study reported lower wheat and rice yields when nano urea replaced part of the conventional urea.
Pest control
Nanotechnology-based pesticides and herbicides may improve the targeted delivery of active ingredients. Nano-formulated pesticides are still largely at the research and trial stage in India.
Such applications require appropriate field evaluation and environmental monitoring.
Soil health monitoring
Nano-biosensors and GPS-based systems can help monitor soil conditions and nutrient levels.
Seed germination
Nano-coated seeds may improve seed vigour and support stress tolerance. Nano-priming of seeds is still being studied in research laboratories.
Irrigation and water filtration
Nanotechnology-based filtration systems and nanofiltration membranes can help improve water treatment and support more efficient water use.
Post-harvest monitoring
Nanotechnology-based food packaging can help improve shelf life and monitor food quality. Silver nanoparticles, for example, are being tested in packaging for their antimicrobial properties.
Overall, nanotechnology may help improve agricultural productivity, reduce resource wastage and strengthen food-system resilience. However, effectiveness and safety depend on the material, crop, application method and local conditions.
2. Healthcare
Healthcare is one of the most important fields for nanotechnology because nanoscale materials can be designed to interact with cells, tissues and biological molecules.
Diagnostics
Quantum-dot fluorescence imaging can support biomedical imaging and cancer research. Nanotechnology-based biosensors, DNA chips and molecular imaging may also help detect diseases and biological markers.
Targeted drug delivery
Liposomes, dendrimers and micelles can be designed to carry drugs towards particular tissues or cells. Targeted delivery may improve treatment efficiency and reduce exposure of healthy tissues, although outcomes depend on the specific treatment.
Regenerative medicine
Nanotechnology-based scaffolds can support tissue engineering and research into tissue regeneration.
Smart wound care
Smart bandages and hydrogel dressings may help maintain suitable wound conditions and, in specialised designs, monitor aspects of healing.
Surgical applications
Researchers are studying hydrogels for brain-cancer treatment and nanorobots as possible surgical tools. These areas include emerging research and should not be confused with routine clinical capabilities.
Nanotechnology therefore offers promising possibilities for diagnosis, drug delivery and regenerative medicine, but safety, efficacy and regulatory evaluation remain essential.
3. Environmental Protection
Nanotechnology can contribute to pollution control, water treatment and environmental monitoring.
Magnetic nanoscavengers: Magnetic materials can be designed to capture selected contaminants and then be separated from water or other media using magnetic fields.
Water purification: Nanocellulose and graphene-based materials may help remove selected pollutants during water treatment.
Air purification: Nanotechnology-based filters may capture fine particles and other contaminants.
Oil-spill cleanup: Specialised nanomaterials can be designed to absorb or separate oil from water.
Industrial effluent treatment: Nanomembranes may support the separation of carbon dioxide or other components from industrial streams, depending on the membrane design and process.
These technologies may improve pollution management, but their effectiveness, cost, regeneration and disposal must be assessed before large-scale deployment.
4. Energy Sector
Nanotechnology can support energy efficiency, renewable energy and advanced materials.
- Solar panels: Nanocoatings can be used to improve selected properties of solar panels, such as surface performance and resistance to environmental exposure.
- Carbon nanotubes: These materials are being studied for carbon capture, electrodes and other energy-related applications.
- Insulation: Nanocomposite materials can improve thermal insulation in buildings and industrial equipment.
- Window coatings: Specialised coatings can help control heat transfer and light transmission.
The long-term potential of nanotechnology in energy depends on cost, durability, material availability and the ability to manufacture products at scale.
5. Electronics
Nanotechnology supports the miniaturisation and development of electronic components.
Silicon nanophotonics: Uses interactions between light and nanoscale structures to support data transmission and photonic devices.
Nanowires: May be used in specialised transistors, integrated circuits and sensors.
Memristors: Nanoscale materials are being explored for memory devices that can potentially improve memory density and support new computing architectures.
Nano-emissive display panels: Nanoscale materials can improve selected display properties.
Quantum-dot displays: Quantum dots are used in display technologies to produce highly controlled colours.
Quantum computing and bioimaging: Nanomaterials may contribute to selected research applications in these fields.
These developments are important for faster computing, smaller devices and advanced communication systems.
6. Defence
Nanotechnology can support lightweight materials, sensing and advanced protective equipment.
- Sensors: Nanoscale sensors may detect chemical or biological substances and other environmental changes.
- Biosensors: Can support the detection of biological markers or selected biological threats.
- Military drones: Advanced lightweight materials and nanosensors can improve selected drone capabilities.
- Nanosatellites: Can support surveillance-related research, communications and other space-based applications.
- Nanobattle suits: Lightweight, high-performance materials are being explored for protective equipment.
Such technologies may improve situational awareness and equipment performance. However, defence applications also raise concerns about proliferation, misuse and the development of advanced weapons.
7. Computers
Nanotechnology can contribute to smaller electronic components and greater computing efficiency.
Three applications stand out:
- Reduced microprocessor size.
- Magnetic nanoparticle arrays for nanodots.
- Memristor-based memory chips that may increase memory density.
Further progress depends on overcoming challenges involving fabrication, heat management, reliability and the cost of manufacturing nanoscale components.
8. Space Sector
Nanotechnology can help reduce the weight of equipment and improve sensing in space missions.
Water detection: Nanosensors may help identify traces of water in environments being investigated by spacecraft.
Space-suit repair: A NASA-funded concept study (2006) proposed a “smart bio-nano suit” whose nanomachines could detect hazards and help repair damage; it has not been built.
Lightweight spacecraft: Carbon nanotubes and other advanced materials are being researched for lightweight spacecraft structures and launch vehicles.
Solar sails: Lightweight materials can be explored for solar-sail systems that use radiation pressure to propel spacecraft.
These applications remain at different stages of research and development. Their practical use depends on reliability under extreme temperatures, radiation and other space conditions.
Government Initiatives for Nanotechnology in India
Three initiatives stand out in India’s nanotechnology ecosystem.
1. India Graphene Engineering and Innovation Centre
In September 2024 the Ministry of Electronics and Information Technology (MeitY) launched the India Graphene Engineering and Innovation Centre (IGEIC), a not-for-profit company under the Graphene-Aurora programme, in line with the Viksit Bharat@2047 vision. It has its research centre in Thiruvananthapuram, a business hub in Bengaluru and manufacturing in Palakkad, with Carborundum Universal as industry partner.
The initiative aims to strengthen graphene engineering and innovation, support the development of graphene-based technologies and improve the link between research and commercialisation.
2. Graphene Aurora Programme
Launched by MeitY in August 2023 at Maker Village, Kochi, and run by Digital University Kerala, the Graphene-Aurora programme (outlay about ₹95 crore) aims to promote graphene engineering, nurture deep and emerging graphene technologies, and bridge the gap between graphene research and development and commercialisation.
This is important because laboratory discoveries do not automatically become commercially viable products. Testing, pilot-scale production, industrial partnerships and access to investment are needed to bring advanced materials to market.
3. Nano Mission, 2007
The Mission on Nano Science and Technology (Nano Mission) was approved in May 2007 with ₹1,000 crore for five years, with the Department of Science and Technology as nodal agency, to strengthen India’s nanoscience and nanotechnology capabilities. Its second phase was approved in 2014 with ₹650 crore, and it continues as a DST programme.
Its main objectives include:
- Basic research and development: Support scientific investigation and technological innovation.
- Infrastructure development: Establish and strengthen research facilities.
- Human-resource development: Train scientists, researchers and skilled professionals.
- International collaboration: Encourage research partnerships and knowledge exchange.
The Nano Mission represents an important effort to build scientific capacity and support the development of nanotechnology in India.
Challenges Associated with Nanotechnology
Despite its potential, nanotechnology presents health, environmental, ethical, security and economic challenges.
1. Health Concerns
Inhaled nanoparticles may affect the lungs and can cause inflammation. However, the health effects vary according to particle size, composition, shape, dose and exposure route.
There is still a need for better understanding of how different nanoparticles interact with body organs and biological systems.
Way forward: Strengthen toxicological research, occupational safety, exposure monitoring and product-specific risk assessment.
2. Environmental Impact
Some nanoparticles may persist in the environment or form pollutants that are difficult to remove. Improper disposal can introduce them into water, soil and food chains.
Biomagnification is another concern associated with improper disposal. Whether a particular nanomaterial bioaccumulates or biomagnifies depends on its chemical properties and behaviour in the environment.
Way forward: Establish appropriate disposal standards, evaluate environmental fate and toxicity, and encourage safer-by-design materials.
3. Toxicology and Bioaccumulation
Nanoparticles may accumulate in particular tissues or enter biological barriers, depending on their properties and exposure. Their small size can create challenges for conventional toxicity assessment.
Way forward: Develop standardised testing methods and long-term studies to evaluate the safety of different nanomaterials.
4. Security Concerns
The possible misuse of nanotechnology for weapons is a serious concern.
Advanced materials and nanoscale systems may also create new risks if used for harmful purposes.
Way forward: Strengthen responsible research practices, biosafety and security protocols, and appropriate oversight of dual-use technologies.
5. Ethical Concerns
Nanotechnology can raise questions about privacy, surveillance, intellectual property and unequal access.
Nanosensors and miniaturised monitoring systems may collect sensitive information. High intellectual-property costs can also limit access to technologies, while the benefits may be concentrated among wealthier institutions or countries.
Way forward: Establish clear ethical standards, protect privacy, encourage fair licensing arrangements and support wider access to beneficial technologies.
6. Integration and Skilled Manpower
Weak collaboration between laboratories and industry, limited academic expertise and insufficient private-sector involvement are major barriers.
These gaps can slow the transition from research to commercially useful products.
Way forward: Expand university–industry partnerships, strengthen specialist training, support incubators and encourage private investment in research and manufacturing.
Way Forward
India needs an integrated strategy to develop nanotechnology responsibly and convert scientific discoveries into useful products.
1. Strengthen Academia–Industry Linkages
Universities, research institutions and companies should collaborate on applied research, product testing and commercialisation. Technology-transfer mechanisms and joint research programmes can help bridge the gap between laboratory innovation and market adoption.
2. Deepen International Cooperation
Collaboration with international research organisations can help India share expertise, develop standards and participate in emerging areas of nanoscience.
Such cooperation should also include safety research, environmental assessment and responsible technology governance.
3. Increase Research Funding
Sustained funding for basic and applied research is essential. Support should extend to laboratory infrastructure, pilot plants, advanced instrumentation and the development of specialised research institutes.
4. Develop Skilled Human Resources
India needs trained scientists, engineers, toxicologists, material specialists and technicians. Interdisciplinary courses and industry-oriented training can help meet this demand.
5. Promote Safe Laboratory Practices
Research institutions and manufacturing facilities should follow suitable exposure controls, protective procedures, waste-management protocols and occupational-safety standards.
6. Encourage Commercialisation
Government support, private investment, testing facilities and innovation centres can help translate research into commercially viable products.
Initiatives such as the India Graphene Engineering and Innovation Centre and the Graphene Aurora Programme can contribute to this objective.
7. Establish Stronger Safety and Ethical Frameworks
Risk assessment should be proportionate to the properties and intended uses of each nanomaterial. Regulations should address worker exposure, consumer safety, environmental release, waste disposal and dual-use risks.
8. Improve Public Awareness
Clear communication about the benefits and risks of nanotechnology can help build public trust. Research institutions and policymakers should explain both scientific opportunities and the limits of current knowledge.
Conclusion
Nanotechnology is an important emerging field with applications in agriculture, healthcare, environmental protection, energy, electronics, defence, computing and space exploration. Its ability to manipulate materials at the nanoscale can create new opportunities for scientific innovation and economic development.
India’s Nano Mission, launched in 2007, and newer initiatives such as the India Graphene Engineering and Innovation Centre and the Graphene Aurora Programme reflect efforts to strengthen research, infrastructure, skills and commercialisation.
However, health risks, environmental persistence, ethical concerns, security threats and shortages of skilled personnel must be addressed. Stronger collaboration between academia and industry, sustained funding, international cooperation and safe laboratory practices will be essential.
The future of nanotechnology in India will depend not only on scientific advances but also on the ability to develop and deploy these technologies safely, equitably and responsibly.
Frequently asked questions
Who is known as the father of nanotechnology?
Richard Feynman, for his 1959 lecture “There’s Plenty of Room at the Bottom”. The Japanese scientist Norio Taniguchi coined the word “nanotechnology” in 1974.
What size range does nanotechnology deal with?
Roughly 1 to 100 nanometres. A nanometre is one-billionth (10−9) of a metre.
When was India’s Nano Mission launched?
It was approved in May 2007 with ₹1,000 crore for five years, with the Department of Science and Technology as nodal agency. Phase II was approved in 2014 with ₹650 crore.
What is nano urea?
A liquid nano fertiliser developed by IFFCO and approved under the Fertiliser Control Order in 2021, sprayed on leaves to supply nitrogen. Its benefits are debated: some field trials have reported lower yields when it replaced conventional urea.
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