Nanotechnology involves designing and manipulating materials, devices, and systems at the nanoscale, typically 100 nanometres or smaller-by controlling atoms and molecules.
Key Characteristics of Nanotechnology
High Surface-Area-to-Volume Ratio: Material surface area increases drastically at the nanoscale, exponentially accelerating its chemical reactivity.
Quantum Confinement Effects: Restricting electrons at atomic levels alters a material’s optical, electrical, and magnetic behaviors.
Altered Physical Strength: Nanomaterials exhibit significantly enhanced structural strength, mechanical durability, and flexibility compared to bulk forms.
Enhanced Biological Penetration: Extremely small particle sizes allow nanomaterials to easily cross dense biological cellular barriers.
Tunable Material Properties: Changing particle sizes allows scientists to precisely alter colors, conductivity, and melting points.
Nanotechnology in the Health Sector
Targeted Drug Delivery: Nanocarriers, such as liposomes and nanoparticles, can be engineered to deliver drugs directly to diseased cells. Eg- Abraxane– treat breast and pancreatic cancer.
Nanosensors for Early Diagnosis: Detect biomarkers such as proteins or DNA sequences at extremely low concentrations, enabling early diagnosis of diseases like cancer and Alzheimer’s.
Advanced Imaging: Nanoparticles like Quantum Dots and iron oxide nanoparticles provide superior contrast for MRI and CT scans.
Regenerative medicine: Nanoscaffolds mimic the body’s natural cellular framework, promoting cell growth and tissue regeneration to repair damaged organs and tissues.
Smart Nanobots for Surgery: Though still in evolving stages, Emerging nanobots are being developed for minimally invasive microsurgeries, such as removing arterial blockages.
Improved Bioavailability of Drugs: Nano-formulations enhance the solubility and absorption of poorly water-soluble drugs by increasing their surface-area-to-volume ratio.
Antibacterial and Wound Healing: Silver nanoparticles (AgNPs) are used in wound dressings and surgical coatings to prevent infections, including drug-resistant bacteria.
Gene therapy: Nanoparticles safely deliver DNA or RNA into cells for treating genetic disorders. Eg- Pfizer-BioNTech COVID-19 vaccine and Moderna COVID-19 vaccine use lipid nanoparticles.
Point-of-care diagnostics: Nanotechnology enables “lab-on-a-chip” devices for rapid portable testing, improving healthcare access in rural areas.
For a country like India, leveraging nanotechnology can be the key to achieving the goal of “Affordable and Accessible Healthcare for All” under the National Health Policy.
