TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - The carbon nanotubes are single-walled carbon nanotubes. The organic solvent is selected from hexane, heptane, cyclohexane, benzene, toluene, pyridine, dichloromethane, chloroform, carbon tetrachloride, carbon disulfide, tetrahydrofuran, dioxane, diethyl ether, diisopropylether, ethylene glycol monobutyl ether, methyl ethyl ketone, methyl isobutyl ketone, acetone, cyclohexanone, ethyl acetate, isobutyl isobutyrate, ethylene glycol diacetate, dimethylformamide, acetonitrile, N,N-dimethyl acetamide, nitromethane, acetonitrile, N-methylpyrrolidone, dimethylsulfoxide water, methanol, ethanol, butyl alcohol and formic acid.    TECHNOLOGY FOCUS - POLYMERS - Preferred Polymer: The polymer is selected from 3 polymers as given in specification e.g. polymer of formula (II). Preferred Method: The method involves mixing the composition of carbon nanotubes with a liquid composition of a polymer dissolved in an organic solvent to form a mixture; incubating the mixture; and separating a supernatant and a precipitate formed in the mixture, where mixing the composition of single walled carbon nanotubes is carried out by sonicating or stirring or shaking the mixture. In the method, enriching single-walled carbon nanotubes according to their electronic properties and/or diameter of single-walled carbon nanotubes; enrichment according to electronic properties allows to separate met-single-walled carbon nanotubes from sem-single-walled carbon nanotubes; enriching single-walled carbon nano tubes having a diameter of less than or equal to 1 nm from single-walled carbon nanotubes having a diameter of above 1 nm; the mixture is left to stand during incubation; incubation is carried out for a period of 1 day to 4 weeks (preferably at least one day or 2 weeks); the mixture is centrifugated before separating of the supernatant and the precipitate formed in the mixture; only 90% of the supernatant are separated from the mixture after incubation; and single-walled carbon nanotubes comprised in the precipitate and the supernatant are washed with an organic solvent after separation. Preferred Definitions:    R1=CH3;    R2=CH3, napthalenyl or anthracenyl;    X=direct bond or -CH2-;    n=10-500;    m=0;and    R3=napthalenyl, anthracenyl or fluorescein.    EXAMPLE - No suitable example given.