Patent ID: 8187502

Claim:
An applicator liquid comprising: a liquid medium containing a distribution of purified nanotubes wherein the liquid medium is selected from the group consisting of ethyl lactate, dimethyl sulfoxide (DMSO), monomethyl ether, 4-methyl-2 pentanone, N-ethylpyrrolidone (NMP), t-butyl alcohol, methoxy propanol, propylene glycol, ethylene glycol, gamma butyrolactone, benzyl benzoate, salicyladehyde, tetramethyl ammonium hydroxide and esters of alpha-hydroxy carboxylic acids, wherein the purified nanotubes remain separate from one another without precipitation or flocculation for a time sufficient to apply the applicator liquid to a surface, wherein the purified nanotubes are free of functionalization that deplete π electrons so that desired electrical properties of the nanotubes are maintained, wherein the applicator liquid comprises less than about 1×10 18 atoms/cm 3 of metallic impurities, wherein the applicator liquid is free of surfactants and polymers, and wherein the applicator liquid is free of particle impurities having a diameter of greater than about 500 nm wherein the purified nanotubes are homogenously distributed in the liquid medium.