Single-walled carbon nanotubes (SWCNTs) are widely used in electronics due to their exceptional electrical conductivity and strength. They are integrated into transistors, sensors, and conductive films, enhancing device performance and miniaturization. In energy storage, SWCNTs improve the efficiency of batteries and supercapacitors by providing high surface area and conductivity. They are also utilized in composite materials to reinforce polymers, metals, and ceramics, resulting in lightweight yet durable products for aerospace, automotive, and sports equipment. Additionally, SWCNTs play a role in biomedical applications, such as drug delivery systems and imaging agents, due to their unique optical and mechanical properties. Their ability to absorb and emit light makes them valuable in optoelectronics and photovoltaics, contributing to advancements in solar cells and light-emitting devices.