Patent ID: 8771628
Filing Date: 2014-07-08
Classification: B82Y,C01B,D06M,H01L,Y10S

Abstract:
1. A method for making an applicator liquid, the method comprising: purifying a plurality of nanotubes to obtain purified nanotubes, wherein said step of purifying is accomplished by: contacting said plurality of nanotubes with an acid to create a nanotube-acid solution and dissolve metal impurities, separating the dissolved metal impurities from said nanotube-acid solution to obtain said purified nanotubes in said nanotube-acid solution, and contacting said plurality of nanotubes in the nanotube-acid solution with a base to return the pH level of the nanotube-acid solution to approximately neutral to obtain purified nanotubes; and contacting said purified nanotubes with water; wherein said applicator liquid contains said purified nanotubes distributed in said water without substantial precipitation for at least one hour after said contacting; said applicator liquid is free of polymers and surfactants; and said applicator liquid has a group I metal impurities content of less than 100 ppb.