Patent ID: 7488508

Claim:
A method of making an asymmetric end-functionalized carbon nanotube film, comprising: providing a carbon nanotube film substrate free having a first end and a second end; contacting the first end of the carbon nanotube film with a first reactive medium; reacting the first end of the carbon nanotube film with the first reactive medium by a first physicochemical process to form an end-functionalized first end without reacting the sidewall or the second end; contacting the second end of the carbon nanotube film with a second reactive medium, wherein the first reactive medium is different from the second reactive medium; and reacting the second end of the carbon nanotube film with the second reactive medium by a second physicochemical process to form an end-functionalized second end without reacting the sidewall or the first end; wherein the end-functionalized first end is different from the end-functionalized second end.