Nanoparticles

Nano-objects are materials that have at least one dimension—length, width, height, or diameter—ranging from 1 to 100 nanometers (nm). Nanoparticles are a specific type of nano-object where at least two dimensions fall within this 1-100 nm range. These nanoparticles can exist in various forms: as dry particles, suspended in a gas (referred to as a nanoaerosol), suspended in a liquid (known as a nanocolloid or nanohydrosol), or embedded in a matrix (called a nanocomposite).