Nanotechnology: Applications, Benefits, Challenges and Future Prospects
Introduction
Nanotechnology is one of the most important emerging fields in modern science and technology. It involves understanding, designing, producing, and using materials and devices at an extremely small scale, generally involving structures measured in nanometres.
One nanometre is one-billionth of a metre. To put this into perspective, a human hair is roughly tens of thousands of nanometres wide. At the nanoscale, materials can exhibit physical, chemical, electrical, optical, and biological properties that differ significantly from those of the same materials at larger scales.
Nanotechnology brings together several scientific disciplines, including physics, chemistry, biology, materials science, engineering, medicine, computer science, and environmental science. Its applications range from medicine and agriculture to electronics, energy, water treatment, manufacturing, and environmental protection.
What Is Nanotechnology?
Nanotechnology refers broadly to the science and engineering of manipulating matter at the nanoscale to produce useful structures, materials, and devices.
The prefix “nano” comes from the Greek word nanos, meaning very small. One nanometre is equal to:
1 nanometre = 0.000000001 metre
or:
1 nm = 10⁻⁹ metres
At this scale, materials can behave differently from their bulk counterparts. These differences can result from the very small size of the
