Patent ID: 8709184

Claim:
Single-walled carbon nanotube saturable absorber production via a multi-vacuum filtration method comprising: filling a carbon nanotube mixed solution in which a carbon nanotube solution and distilled water are mixed in a vacuum chamber installed with a membrane filter and filtering the solution to deposit a carbon nanotube thin film on the membrane filter (S 10 ); separating the membrane filter including the carbon nanotube thin film deposited thereon from the vacuum chamber to dry the membrane filter (S 20 ); floating the membrane filter including the carbon nanotube thin film deposited thereon on an etchant and dissolving the membrane filter to thereby remove the membrane filter (S 30 ); diluting the etchant to replace the etchant with distilled water and then sinking a lower polymer film under the carbon nanotube thin film (S 40 ); removing the distilled water while adjusting a position of the lower polymer film to deposit the carbon nanotube thin film on the lower polymer film (S 50 ); and coating an upper polymer film on the carbon nanotube thin film deposited on the lower polymer film (S 60 ).