amphoteric and zwitterionic detergent active compounds and mixtures thereof surfactants can assist with the delivery of hydrophobic nanoparticles particularly so called linear hybrid monomers an example of such a linear hybrid monomer is the molecular silica sold under the trade name u2018 iso octyl poss cage mixture u2019 whose chemical formula is c 64 h 88 o 12 si 8 these nanoparticles are intrinsically insoluble in water due to the iso octyl chains covalently bonded to the silica structure many suitable surfactants are available and are fully described in the literature for example in u201c surface active agents and detergents u201d volumes i and ii by schwartz perry and berch wiley interscience the preferred surfactants that can be used are soaps and synthetic non soap anionic and nonionic compounds anionic surfactants are well known to those skilled in the art examples include alkylbenzene sulphonates particularly linear alkylbenzene sulphonates having an alkyl chain length of c 8 u2013 c 15 primary and secondary alkylsulphates particularly c 8 u2013 c 15 primary alkyl sulphates alkyl ether sulphates olefin sulphonates alkyl xylene sulphonates dialkyl sulphosuccinates and fatty acid ester sulphonates sodium salts are generally preferred nonionic surfactants that may be used include the primary and secondary alcohol ethoxylates especially the c 8 u2013 c 20 aliphatic alcohols ethoxylated with an average of from 1 to 20 moles of.