Patent ID: 8900867

Claim:
A method for forming a culture medium, comprising: fabricating a carbon nanotube structure by orderly arranging a plurality of carbon nanotubes; sterilizing the carbon nanotube structure; forming a hydrophilic layer on a surface of the carbon nanotube structure, wherein the hydrophilic layer is configured to culture a plurality of neurons, and a material of the hydrophilic layer is an inorganic material; and forming a polar layer on a surface of the hydrophilic layer away from the carbon nanotube structure, wherein the forming the polar layer comprises: providing a supporter; placing the carbon nanotube structure having the hydrophilic layer on a surface of the supporter; soaking the carbon nanotube structure having the hydrophilic layer on the surface of the supporter with an organic solvent; evaporating the organic solvent from the carbon nanotube structure; and forming the polar surface on the hydrophilic layer by soaking the carbon nanotube structure having the hydrophilic layer on the supporter after the evaporating the organic solvent from the carbon nanotube structure.