Nanotubes are cylindrical nanostructures with diameters on the order of nanometers (1-100 nm) and lengths ranging from a few nanometers to several micrometers. They can be made from various materials, such as carbon, boron nitride, or metal oxides, and exhibit unique properties due to their high aspect ratio and atomic-level precision in structure. Carbon nanotubes, in particular, have garnered significant attention for their exceptional mechanical, electrical, and thermal properties, making them promising materials for a wide range of applications in industries such as electronics, aerospace, and medicine. They can be either single-walled (consisting of a single layer of carbon atoms) or multi-walled (consisting of multiple concentric layers), each offering different advantages for different applications. Research in the field of nanotubes focuses on understanding their synthesis, properties, and potential applications. Scientists and engineers are exploring ways to improve the production techniques, modify the properties of nanotubes through functionalization, and integrate them into various devices and systems to harness their unique characteristics. Overall, nanotubes represent a rapidly growing and promising area of research with vast potential for innovation and technological advancement.