Method for processing one-dimensional nano-materials

A method for processing nano-materials, comprising the steps of:

• providing a substrate extending in a plane defined by first and second directions;
• forming nano-materials on said substrate along a third direction essentially perpendicular to said first and second directions;
• flattening top portions of said nano-materials, the top portions being distal from the substrate;
• and
• applying energy on said flattened top portions to reform said flattened top portions into a plurality of apexes around a same level.

A method for making a field emission device, comprising the steps of:

• densely forming a plurality of nanotubes on a substrate;
• trimming top portions of at least some of the nanotubes to be at a same level, the top portions being distal from the substrate;
• and
• reforming said trimmed top portions into a plurality of tapered tips;
• wherein
• said tapered tips are generally evenly arranged on said substrate.

A method for processing one-dimensional nano-materials, comprising the following steps:

• (1) providing a substrate;
• (2) forming one-dimensional nano-materials on the substrate, the one-dimensional nano-materials cooperatively defining a surface distal from the substrate;
• and
• (3) applying physical energy to said surface of the one-dimension nano-materials at an angle relative to an imaginary line that is perpendicular to the substrate, the angle being approximately thirty degrees.