Nanomaterials

Nanomaterials are materials that are composed of particles of nanometer size, that is, particles with a diameter of 1–100 nanometers. Nanomaterials have unique properties that make them useful for a variety of applications. These properties arise due to their small size, which allows for a high surface-to-volume ratio and for quantum confinement effects. The size of nanomaterials also allows them to interact with light in novel ways, making them useful for photonics applications. Furthermore, nanomaterials are often more chemically reactive than their bulk counterparts, making them useful for chemical synthesis. Nanomaterials can be divided into two categories: those made of single atoms or small molecules, and those made of larger structures such as nanotubes or nanowires. Examples of single-atom nanomaterials include carbon nanotubes, graphene, and fullerenes. Nanowires and nanotubes, on the other hand, are composed of larger molecules such as carbon, silicon, and metals. Nanomaterials have a variety of applications in many different fields. For instance, they are used in electronics, optics, energy storage, and biomedical engineering. Carbon nanotubes, for example, are used in transistors and as conductive wires in electronic circuits. Graphene is used