METHOD OF USING CARBON NANOTUBES TO FABRICATE TRANSPARENT CONDUCTIVE FILM
A method of using carbon nanotubes to fabricate a transparent conductive film comprising steps: disposing a plurality of carbon nanotubes and a plurality of metallic particles on a substrate; illuminating the carbon nanotubes with a light beam or treating the carbon nanotubes with electric corona to induce photocurrents or discharge currents in the carbon nanotubes; and heating and melting the metallic particles with the photocurrents or the discharge currents to solder the metallic particles with the carbon nanotubes and form a transparent conductive film on the substrate. The present invention uses a light illumination or an electric corona treatment to reliably connect the carbon nanotubes by the metallic particles and increase the conductivity of the transparent conductive film.
1 . A method of using carbon nanotubes to fabricate a transparent conductive film, comprising the following steps of:
Step 1 : disposing a plurality of carbon nanotubes and a plurality of metallic particles on a substrate;
Step 2 : illuminating the carbon nanotubes with a light beam to induce photocurrents in the carbon nanotubes; and
Step 3 : heating and melting the metallic particles with the photocurrents to solder the metallic particles with the carbon nanotubes and form a transparent conductive film on the substrate.
2 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 1 , wherein in Step 1 , the carbon nanotubes have a length of 5 nm-1 mm.
3 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 1 , wherein in Step 1 , the metallic particles have a diameter of 1 nm-100 nm.
4 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 1 , wherein in Step 2 , the light beam has a wavelength of 390 nm-3000 nm.
5 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 1 , wherein in Step 2 , photons of the light beam have energy of 0.41 eV-3.18 eV.
6 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 1 , wherein in Step 1 , the substrate is made of a material selected from a group consisting of polyethylene terephthalate (PET), glass, polymethylmethacrylate (PMMA), polychloroprene (PC), acrylic, polypropylene (PP), polystyrene (PS), polyethylene (PE), acrylonitrile butadiene styrene (ABS), and ethylene vinyl acetate (EVA).
7 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 1 , wherein in Step 1 , the metallic particles is made a material selected from a group consisting of silver, tin, copper, gold, aluminum, tungsten, iron, platinum, lead, manganese, nickel, indium, and alloys thereof.
8 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 1 , wherein in Step 3 , the metallic particles are made of silver, and the metallic particles are heated to a temperature of 750-1000° C.
9 . A method of using carbon nanotubes to fabricate a transparent conductive film, comprising the following steps of:
Step A: disposing a plurality of carbon nanotubes and a plurality of metallic particles on a substrate;
Step B: treating the carbon nanotubes with electric corona to induce discharge currents in the carbon nanotubes; and
Step C: heating and melting the metallic particles with the discharge currents to solder the metallic particles with the carbon nanotubes and form a transparent conductive film on the substrate.
10 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 9 , wherein in Step A, the carbon nanotubes have a length of 5 nm-1 mm.
11 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 9 , wherein in Step A, the metallic particles have a diameter of 1 nm-100 nm.
12 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 9 , wherein in Step A, the substrate is made of a material selected from a group consisting of polyethylene terephthalate (PET), glass, polymethylmethacrylate (PMMA), polychloroprene (PC), acrylic, polypropylene (PP), polystyrene (PS), polyethylene (PE), acrylonitrile butadiene styrene (ABS), and ethylene vinyl acetate (EVA).
13 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 9 , wherein in Step A, the metallic particles is made of a material selected from a group consisting of silver, tin, copper, gold, aluminum, tungsten, iron, platinum, lead, manganese, nickel, indium, and alloys thereof.
14 . The method of using carbon nanotubes to fabricate a transparent conductive film according to claim 9 , wherein in Step C, the metallic particles are made of silver, and the metallic particles are heated to a temperature of 750-1000° C.