This book explores the structure, properties, and applications of carbon nanotubes, a key material in nanotechnology. It introduces fundamental concepts such as nanoscale structures, electrical conductivity, and mechanical strength. The text examines synthesis methods and characterization techniques used to study carbon nanotubes. It also discusses their applications in electronics, materials engineering, medicine, and energy storage. Emphasis is placed on the unique properties that make carbon nanotubes valuable in advanced technologies. Challenges and future prospects in nanotechnology are also highlighted. By integrating scientific principles with technological applications, the book serves as a valuable resource for students and professionals in nanoscience and materials engineering.