This document discusses carbon nanotubes (CNTs). It defines nanochemistry as the study and synthesis of nanoparticles between 1-100 nanometers in size. CNTs are cylindrical carbon molecules with unusual properties valuable for applications in nanotechnology, electronics, optics, and other fields. There are two main types of CNTs - single-walled and multi-walled. CNTs can be produced through methods like arc discharge, laser ablation, and chemical vapor deposition. CNTs have remarkable mechanical, electrical, and thermal properties and are being researched for applications in areas like medicine, composites, microelectronics, chemicals, and more, though more study is still needed on their toxicity and environmental impact.