A method for preparing organic nanotubules in an aqueous medium including preparing a basic solution with a pH from 10 to 14, adding an organic compound of the formula: ##STR00001## wherein R.sup.1 is a C.sub.17-C.sub.20 polycyclic radical with fused rings optionally including alkyl substituents, R.sup.2 is a C.sub.3-C.sub.20 linear or branched alkylene group, and R.sup.3 represents a hydrogen atom, a C.sub.1-C.sub.20 alkyl or C.sub.6-C.sub.30 aromatic group, and submitting the solution to stirring for sufficient time in order to form stable tubules of the organic compound in the solution; and nanotubules prepared by the method.