Method for growing carbon nano-tubes

Abstract

The invention relates to a method for growing carbon nano-tubes. The method includes the steps that a substrate with the surface covered with nano-particles is prepared; with the nano-particles serving as an etching mask, the substrate is etched; the nano-particles are removed from the substrate; a catalyst is deposited on the substrate; the carbon nano-tubes are grown on the substrate with the catalyst deposited.

Description

technical field [0001] The present application relates to the field of nanomaterials, in particular to a method for growing carbon nanotubes. Background technique [0002] Carbon nanotubes are tubular one-dimensional nanomaterials formed by winding single-layer or multi-layer graphene sheets. Carbon nanotubes have excellent optical, electrical, thermal and mechanical properties, and their current densities are as high as, for example, 10 9 A / cm 2 , the electron mobility can reach for example 10000cm 2 / V·s, the thermal conductivity is as high as 6600W / mK, and the Young's modulus is as high as 1TPa, which is about 5 times that of steel. Based on the above excellent properties, carbon nanotubes can be used in many fields such as electricity and mechanics. [0003] At present, the main methods for preparing carbon nanotubes are: arc discharge method, laser burning candle method, chemical vapor deposition method, etc., and chemical vapor deposition method is the most commonl...

AI Technical Summary

Problems solved by technology

However, since the cracking of the catalyst is free cracking, the diameter of the catalyst particles produced is extremely uneven

Therefore, the carbon nanotubes grown by traditional preparation methods have poor uniformity and low controllability.

Images