Nanoparticles

nanoparticles

Nanoparticles are ultra-small particles measured in nanometers, often between about 1 and 100 nanometers in size. At that scale they have a very large surface area compared with their volume, which changes how they interact with light, chemicals, and living cells. They can be made from many materials, such as fats, polymers, metals, or ceramics, and shaped as spheres, rods, or hollow shells depending on their purpose. Because of their size and surface properties, nanoparticles can carry drugs, imaging agents, or sensors and protect them until they reach a desired site. These tiny particles are useful in medicine and research because they can improve how treatments reach diseased tissue, boost imaging contrast, or deliver genetic material for therapies. Their ability to cross barriers that block larger objects makes them powerful but also brings safety questions, like how they interact with the immune system or where they accumulate in the body. Researchers study how nanoparticles move, break down, and are cleared to reduce risks, and regulators set rules to manage their use safely. When designed carefully, nanoparticles can enable treatments that were not possible with conventional approaches.