Bionanofluid for use as a contrast, imaging, disinfecting and/or therapeutic agent

A method of creating disruption of a targeted entity, the targeted entity being a prokaryote or eukaryote, the method comprising:

• providing a bionanofluid comprising multiple walled carbon nanotubes (MWCNTs) mono-dispersed in a polar fluid, the MWCNTS having outer surfaces and being modified on the outer surface with polar groups selected from the group consisting of carboxylic acid, amino and thiol, and functionalized with a targeting moiety attached through a spacer to the MWCNTs;
• contacting the targeted entity with the bionanofluid to allow extracellular targeting of the targeted entity with the targeting moiety;
• and
• applying an external energy selected from the group consisting of light, ultrasound or radiowaves to the bionanofluid in contact with the targeted entity;
• wherein:
• the MWCNTs have a length size above 1 micron and not greater than 2 microns;
• the spacer comprises polyethylene glycol (PEG) of a molecular weight of from 5,000 g/mol to 100,000 g/mol;
• and
• the targeting moiety comprises a protein, peptide, nucleic acid, oligonucleotide, biocompatible ligand or a drug molecule.