A nanotube is a cylindrical structure made of carbon atoms arranged in a hexagonal pattern. These tiny tubes can be as small as one nanometer in diameter and can be several micrometers long. Due to their unique structure, nanotubes exhibit remarkable properties, such as high strength, electrical conductivity, and thermal stability, making them valuable in various applications. There are two main types of nanotubes: single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). SWCNTs consist of a single layer of carbon atoms, while MWCNTs have multiple layers. Researchers are exploring their use in fields like electronics, materials science, and medicine for innovative technologies.