These fields then can cause nanotubes to assemble into nanowires. Here is a page at Rice Universitythat goes into a bit more of the details, but let me go over some of the main points.

How Does Teslaphoresis Work?

First, you need to start with a bunch of carbon nanotubes. These are collections of carbon atoms that form a cylinder. Sort of like the image below.

Next you place a bunch of disorganized nanotubes in a space in front of Tesla coil. The nanotubes then align themselves such that they form long chains. Here is a fairly detailed video.