21-11-2019 дата публикации
Номер: US20190350851A1
Discrete, individualized carbon nanotubes having targeted, or selective, oxidation levels or content and a functionalized surface coating are claimed. Such carbon nanotubes can have little to no inner tube surface oxidation, or differing amounts and/or types of oxidation between the tubes' inner and outer surfaces. These new discrete carbon nanotubes are useful for delivery and controlled release of drugs, chemicals, compounds, small molecules, oligonucleotides, peptides, proteins, enzymes, macromolecular gene-editing assemblies, other biologics and combinations of thereof. The functionalized surface coating may be utilized to preferentially direct the nanotubes to particular tissues, organs or regions of the body for controlled delivery and or release of a payload molecule. 1. A composition comprising a plurality of discrete carbon nanotubes , wherein the discrete carbon nanotubes comprise an interior and exterior surface , the interior surface comprising an interior surface oxidized species content and the exterior surface comprising an exterior surface oxidized species content , wherein the interior surface oxidized species content comprises from about 0.01 to less than about 1 percent relative to carbon nanotube weight and the exterior surface oxidized species content comprises more than about 1 to about 10 percent relative to carbon nanotube weight , wherein a biocompatible surface coating is attached to at least a portion of the exterior surface of the discrete carbon nanotubes.2. The composition of claim 1 , wherein the biocompatible surface coating is derived from a precursor selected from PEG (polyethylene glycol) claim 1 , PLA (polylactic acid) claim 1 , PVOH (polyvinyl alcohol) claim 1 , PEO (polyethylene oxide) claim 1 , PGLA (polyglycolic acid) claim 1 , CMC (carboxymethyl cellulose) claim 1 , PVP (polyvinylpyrrolidone) claim 1 , PAA (polyacrylic acid) claim 1 , aminoacids claim 1 , peptides claim 1 , polysaccharides claim 1 , nucleic acids and proteins ...
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