Method for preparing nanotube array, nanotube array and device

A nanotube array prepared by a method for preparing a nanotube array, the method comprises the following steps:

• a template preparation step:
• preparing a double-layer two-dimensional material with a relative angle of lattice orientations on a substrate, the double-layer two-dimensional material being used as a template;
• a nanoribbon array etching step:
• determining chiral parameters of nanotubes to be prepared corresponding to the relative angle of lattice orientations of the double-layer two-dimensional material, determining a nanoribbon orientation and a nanoribbon width according to the determined chiral parameters, determining an inter-nanoribbon spacing according to the density of the nanotubes to be prepared and the nanoribbon width, and etching the double-layer two-dimensional material according to the determined nanoribbon orientation, nanoribbon width and inter-nanoribbon spacing to obtain a nanoribbon array of the double-layer two-dimensional material;
• and
• a nanotube array generation step:
• performing thermal excitation treatment on the obtained nanoribbon array of the double-layer two-dimensional material to obtain a nanotube array.

A carbon nanotube transistor prepared using a carbon nanotube array, the carbon nanotube array is prepared by a method comprising the following steps:

• a template preparation step:
• preparing a double-layer two-dimensional material with a relative angle of lattice orientations on a substrate, the double-layer two-dimensional material being used as a template;
• a nanoribbon array etching step:
• determining chiral parameters of nanotubes to be prepared corresponding to the relative angle of lattice orientations of the double-layer two-dimensional material, determining a nanoribbon orientation and a nanoribbon width according to the determined chiral parameters, determining an inter-nanoribbon spacing according to the density of the nanotubes to be prepared and the nanoribbon width, and etching the double-layer two-dimensional material according to the determined nanoribbon orientation, nanoribbon width and inter-nanoribbon spacing to obtain a nanoribbon array of the double-layer two-dimensional material;
• and
• a nanotube array generation step:
• performing thermal excitation treatment on the obtained nanoribbon array of the double-layer two-dimensional material to obtain a nanotube array.