Method for fabricating a hollow fiber
View Patent ↗A hollow fiber has a hollow tube, a reflecting film formed on an inner wall of the hollow tube, and the reflecting film is a first metal film formed by baking a first metal nano particle solution including a first metal nano particle. The hollow fiber may have a transparent film on the first metal film. The transparent film is formed by baking or chemically reacting from a second metal nano particle included in a second metal nano particle solution.
1. A method for fabricating a hollow fiber, comprising:
injecting a first nano particle solution comprising a first metal nano particle dispersed in a first solvent into a hollow tube comprising a hollow region for transmitting a light;
coating the first nano particle solution on an inner wall of the hollow tube;
forming a first metal thin film having a chemical stability from the first nano particle solution coated on the inner wall;
injecting a second nano particle solution comprising a second metal nano particle dispersed in a second solvent into the hollow tube;
coating the second nano particle solution on a surface of the first metal thin film;
forming a second metal thin film on a surface of the first metal thin film from the second nano particle solution coated on the surface of the first metal thin film; and
injecting a transparent film formation material which chemically reacts with the second metal thin film to form a transparent thin film that is transparent with respect to a wavelength of the light, thereby forming the transparent thin film on the first metal thin film from the second nano particle solution.
2. The method for fabricating a hollow fiber according to claim 1 , wherein the second metal nano particle comprises a silver nano particle, the second metal thin film comprises a silver thin film formed from the silver nano particle, the transparent film formation material comprises an iodine solution containing an iodine, and a silver iodide thin film is formed as the transparent thin film by contacting the iodine solution with the silver thin film.
3. The method for fabricating a hollow fiber according to claim 1 , wherein the second metal nano particle comprises a copper nano particle, the second metal thin film comprises a copper thin film formed from the copper nano particle, the transparent film formation material comprises an oxygen, and a copper oxide thin film is formed as the transparent thin film by contacting the oxygen with the copper thin film for a predetermined time.
4. A method for fabricating a hollow fiber, comprising:
injecting a first nano particle solution comprising a first metal nano particle dispersed in a first solvent into a hollow tube comprising a hollow region for transmitting a light;
coating the first nano particle solution on an inner wall of the hollow tube;
forming a first metal thin film having a chemical stability from the first nano particle solution coated on the inner wall;
injecting a second nano particle solution comprising a second metal nano particle dispersed in a second solvent into the hollow tube;
coating the second nano particle solution on a surface of the first metal thin film; and
flowing a gas including an oxygen into the hollow tube, thereby forming a transparent thin film on the first metal thin film from the second nano particle solution, the transparent thin film being transparent with respect to a wavelength of the light.