Synthesis, Sorting, and Applications of Single-Chirality Single-Walled Carbon Nanotubes

The synthesis of high-quality chirality-pure single-walled carbon nanotubes (SWCNTs) is vital for their applications. It is of high importance to modernize the synthesis processes to decrease the synthesis temperature and improve the quality and yield of SWCNTs. This review is dedicated to the chirality-selective synthesis, sorting of SWCNTs, and applications of chirality-pure SWCNTs. The review begins with a description of growth mechanisms of carbon nanotubes. Then, we discuss the synthesis methods of semiconducting and metallic conductivity-type and single-chirality SWCNTs, such as the epitaxial growth method of SWCNT (“cloning”) using nanocarbon seeds, the growth method using nanocarbon segments obtained by organic synthesis, and the catalyst-mediated chemical vapor deposition synthesis. Then, we discuss the separation methods of SWCNTs by conductivity type, such as electrophoresis (dielectrophoresis), density gradient ultracentrifugation (DGC), low-speed DGC, ultrahigh DGC, chromatography, two-phase separation, selective solubilization, and selective reaction methods and techniques for single-chirality separation of SWCNTs, including density gradient centrifugation, two-phase separation, and chromatography methods. Finally, the applications of separated SWCNTs, such as field-effect transistors (FETs), sensors, light emitters and photodetectors, transparent electrodes, photovoltaics (solar cells), batteries, bioimaging, and other applications, are presented

Optoelectronic properties of nanotubes based on tungsten disulfide

Inorganic nanotubes (NT), such as WS2NT, have unique properties making them promising candidates for op-toelectronic devices. Herein, we performed optical absorption, Raman, and time-domain terahertz spectroscopy of WS2NT in addition to the microscopy measurements to reveal their optoelectronic properties

Broadband optical and terahertz properties of 1D van der Waals heteronanotubes

ID van der Waals heterostructures composed of SWCNT, boron nitride nanotube (BNNT), and molybdenum disulfide nanotube (MoS 2 NT) is a novel material which attracts attention due to the unique properties. In particular, by com-paring C@BN NT and SWCNT@BNNT@MoS 2 NT with MoS 2 flakes, we found that 1D van der Waals heterostructures exhibited optical properties uniquely associated with with their 1D and heterostructure nature