Carbon nanotubes are one-dimensional nanomaterials composed of rolled sheets of graphene, representing an allotrope of carbon structured into cylindrical forms. These tubes exhibit exceptional physical properties, including extremely high tensile strength, excellent electrical conductivity, and favorable thermal properties, which make them highly valuable in advanced materials science. Due to their nanoscale dimensions, they can interact with matter at the quantum level, enabling diverse applications ranging from reinforcing composites in structural materials to facilitating advanced electronics and energy storage devices. Research continues to focus on scaling up their sustainable synthesis and functionalizing their surfaces for precise use in medical diagnostics and specialized catalysts.