Nanobubbles characterised by a double lipophilic layer surrounding a central gaseous portion, with an aqueous layer placed between the said central portion and the said lipophihc double layer, are the subject of the invention. The lipophilic double layer may contain within it compounds of a lipophilic nature. The aqueous layer located between the lipophilic double layer and the central gaseous portion may contain compounds of a hydrophilic nature within it. The nanobubbles may also further comprise targeting molecules associated with the lipophilic double layer, preferably polypeptides, polynucleotides, antibodies or antibody fragments.
