Detection of chirality of single-walled carbon nanotubes on hexagonal boron nitride

摘要

Single-walled carbon nanotube (SWNT) has attracted widespread attention for its unique one-dimensional atomic structure and outstanding physical and chemical properties. For both fundamental research and practical applications, it is critical to figure out the chirality of SWNT because the electronic band structure and the consequent electrical and optical properties are determined by its chirality. Here, we found that the chirality of SWNT on an insulating hexagonal boron nitride (h-BN) substrate can be obtained in a quick and concise manner through measuring the aligning direction and the diameter of SWNT. Additionally, Rayleigh scattering spectroscopy is conducted to confirm the obtained chirality. The developed technique for direct detection of chirality of SWNT on an insulating h-BN substrate could advance the study of chirality-dependent functional SWNT devices and the applications of SWNT related to chirality.