the sample if desired the hybridising products can also be separated from the other ingredients contained within the sample and optionally be washed in a preferred embodiment of the present invention the nucleolipids are used for the isolation of rna molecules especially sirna mirna or mrna when isolating mrna molecules the nucleotide moiety of the nucleolipid has a polydt sequence of course the isolation can also be based on other known sequences contained within the target sequence in another preferred embodiment of the present invention certain types of nucleic acids namely aptameres may be used for the isolation method in case aptameres are used as the nucleic acid moiety of the nucleolipids purification of other molecules than nucleic acids like for example proteins is possible this invention also concerns kits for identifying nucleic acids which contain one or more of the nucleolipids according to the present invention these kits contain instructions for the detection of nucleic acids and if required a second liquid phase which builds a liquid liquid boundary with the liquid sample the nucleotides according to the present invention may also be used to produce arrays of nucleic acids this means that the nucleolipids containing a lipid moiety and an oligonucleotide moiety can be utilised in nucleic acid arrays so called dna chips these dna chips can be used for example for the analysis of genes or sections of genes in particular in pharmacogenetic analyses those microarrays may now be produced with the help of the nucleolipids according to the present invention which in contrast to the conventional dna chips no longer requires complicated chemical procedures for activation of the solid surface and chemical fixation of the sample sequences on those surfaces furthermore the arrays according to the present.