METHOD FOR PURIFICATION OF SINGLE-LAYER CARBON NANOTUBES Russian patent published in 2023 - IPC B82B3/00 B82Y40/00 

FIELD: nanotechnology.

SUBSTANCE: invention relates to a method for cleaning and "soft" oxidation of the surface of single-walled carbon nanotubes (SWCNTs). The invention can be used to clean the surface of nanotubes for their subsequent functionalization with various biologically active molecules for the purpose of biomedical applications for the therapy of a number of pathologies, as well as for the use of SWCNTs in the manufacture of accurate diagnostic instruments and probes. The method for cleaning single-walled carbon nanotubes (SWCNTs) consists in dispersing SWCNTs in water, then they are diluted in a buffer at neutral pH to a concentration of 100 mcg/ml, after which the treatment of SWCNTs with hypochlorite is started, adding it to a concentration of 50-250 mcM, at the same time, oxidation is monitored by instrumental measurement of optical absorption spectra not earlier than 7-8 hours after each addition of hypochlorite, which is carried out until the amplitude of the suspension spectrum in the near infrared region decreases by 12-20% relative to the control sample, to which an equivalent water volume is added instead of hypochlorite.

EFFECT: increased efficiency of purification of SWCNTs.

1 cl, 3 dwg, 4 ex