Multi-walled carbon nanotubes are composed of multiple layers of graphene sheets rolled into cylinders, with a fixed distance maintained between the layers, forming a coaxial tubular structure. Their diameters typically range from 5 to 30 nm, and their lengths can vary from a few micrometers to several tens of micrometers, depending on the preparation method and conditions. The purity of industrial-grade multi-walled carbon nanotubes can reach 95% or higher, ensuring stability and reliability in applications. The main method for preparing industrial-grade multi-walled carbon nanotubes is chemical vapor deposition (CVD). During the CVD process, carbon sources (such as methane or acetylene) decompose under high temperatures in the presence of catalysts (such as iron, cobalt, or nickel), depositing into tubular structures. By controlling the reaction conditions and using specific catalysts, it is possible to precisely control the diameter, length, and structural characteristics of multi-walled carbon nanotubes.

Technical Parameters

Diameter: 10-20nm

Length: 20-100μm

Purity: >95wt%