swcn

SWCN refers to single-walled carbon nanotubes. These are cylindrical molecules made of rolled-up sheets of single-layer carbon atoms (graphene). Their structure consists of a hexagonal lattice of carbon atoms, forming a seamless tube with a diameter of about one nanometer. The length of SWCNs can vary considerably, from a few nanometers to several millimeters.

SWCNs exhibit exceptional mechanical, electrical, and thermal properties. They are among the strongest and stiffest materials known, with a tensile strength and Young's modulus far exceeding those of steel. Their electrical conductivity is also remarkable, with some SWCNs behaving as metals and others as semiconductors, depending on their chirality (the way the graphene sheet is rolled up). This tunable electronic behavior makes them highly attractive for electronic applications.

The synthesis of SWCNs typically involves methods such as chemical vapor deposition (CVD), arc discharge, and laser ablation. Various catalysts are used to facilitate their formation. Ongoing research focuses on controlling the chirality and purity of synthesized SWCNs to optimize their properties for specific applications.

Potential applications for SWCNs are diverse and include advanced composites, field-effect transistors, sensors, energy storage devices, and biomedical applications like drug delivery and imaging. However, challenges remain in their large-scale, cost-effective production and their integration into practical devices.