NANOTECHNOLOGY - OVERVIEW

Nanotechnology represents a transformative scientific domain that involves the design, synthesis, characterization, and application of materials and devices at the nanometre scale (1–100 nm), where unique physical, chemical, and biological properties emerge. At this scale, nanomaterials exhibit enhanced surface area, quantum effects, and tenable functionalities, enabling revolutionary advancements across medicine, electronics, energy, and environmental sciences. Nanomaterials such as nanoparticles, nanotubes, nanowires, and nanosheets have attracted significant attention due to their exceptional mechanical strength, electrical conductivity, optical behaviour, and catalytic efficiency. Among these, quantum dots are semiconductor nanocrystals that display size-dependent optical and electronic properties governed by quantum confinement effects. Their high photostability, narrow emission spectra, and tunable fluorescence make them invaluable in bioimaging, diagnostics, optoelectronics, and solar energy harvesting. Quantum dots have emerged as powerful tools in targeted imaging and sensing applications, particularly in biomedical and environmental monitoring fields. Nanorobotics is an emerging interdisciplinary area that focuses on the development of nanoscale machines capable of performing precise tasks at the cellular and molecular levels. Nanoelectronics involves the integration of nanotechnology into electronic components, leading to faster, smaller, and more energy-efficient devices.