Patent Document ID: 9433703
Application ID: 13563980
Patent Flag: 1

Claim One:
1. A neural graft comprising: a biological substrate in the form of a sheet shaped structure made of a material selected from the group consisting of silicone, a biodegradable material and a biocompatible material; a free-standing carbon nanotube structure located on a surface of the biological substrate, the carbon nanotube structure consisting of a plurality of carbon nanotube wires spaced from each other and at least one carbon nanotube wire crossed between the plurality of carbon nanotube wires, a distance between adjacent two of the plurality of carbon nanotube wires is greater than or equal to 30 micrometers and less than or equal to 60 micrometers, wherein each of the plurality of carbon nanotube wires comprises a plurality of carbon nanotubes extending along a direction substantially parallel with the surface of the biological substrate, and a surface of each of the plurality of carbon nanotubes is a polar surface formed with a treatment of poly-D-lysine or polyetherimide solution; and a neural network consisting of a plurality of neural cell bodies and a plurality of neurites branched from the plurality of neural cell bodies, wherein the polar surface has a surface charge property different from a surface charge property of the neural network, all the plurality of neural cell bodies and the plurality of neurites are in direct contact with the surface of each of the plurality of carbon nanotubes, and the plurality of neurites extend substantially along the plurality of carbon nanotube wires such that the plurality of neurites are patterned.