Method for functionalization of carbon nano-objects by forming at least one layer of a crosslinked polymer around these nano-objects, which comprises at least the following steps: a) dispersing nano-objects in an aqueous solution of a surfactant to obtain a suspension in which each nano-object is surrounded with surfactant molecules, the hydrophobic portion of these molecules being oriented towards the nano-object and the hydrophilic portion of said molecules being in contact with the water of the suspension; b) mixing the thereby obtained suspension with a solution comprising one or several organic and/or organo-inorganic monomers in an organic solvent non-miscible with water, the monomer(s) having a dichloromethane/deionized water partition coefficient at least equal to 5 at a temperature de 25°C and comprising at least three polymerizable chemical groups selected from thiol and selenol groups, optionally protected with a protective group, this mixture being made with stirring, whereby the solution of monomer(s) is brought to the interface between the nano-objects and the surfactant molecules which surround these nano-objects; c) removing the organic solvent from the mixture; d) polymerizing and crosslinking the monomer(s) at the interface between the nano-objects and the surfactant molecules which surround these nano-objects, after deprotection of the polymerization chemical groups if the latter are protected, to obtain the formation of a crosslinked polymer layer around the nano-objects, this layer being itself surrounded by surfactant molecules; e) removing the surfactant molecules which surround the crosslinked polymer layer; and f) recovering the thereby functionalized nano-objects. a) dispersing nano-objects in an aqueous solution of a surfactant to obtain a suspension in which each nano-object is surrounded with surfactant molecules, the hydrophobic portion of these molecules being oriented towards the nano-object and the hydrophilic portion of said molecules being in contact with the water of the suspension; b) mixing the thereby obtained suspension with a solution comprising one or several organic and/or organo-inorganic monomers in an organic solvent non-miscible with water, the monomer(s) having a dichloromethane/deionized water partition coefficient at least equal to 5 at a temperature de 25°C and comprising at least three polymerizable chemical groups selected from thiol and selenol groups, optionally protected with a protective group, this mixture being made with stirring, whereby the solution of monomer(s) is brought to the interface between the nano-objects and the surfactant molecules which surround these nano-objects; c) removing the organic solvent from the mixture; d) polymerizing and crosslinking the monomer(s) at the interface between the nano-objects and the surfactant molecules which surround these nano-objects, after deprotection of the polymerization chemical groups if the latter are protected, to obtain the formation of a crosslinked polymer layer around the nano-objects, this layer being itself surrounded by surfactant molecules; e) removing the surfactant molecules which surround the crosslinked polymer layer; and f) recovering the thereby functionalized nano-objects.