The present invention is a stable, nanometer scale micro-tubular aggregated material
of an asymmetric double-headed lipid represented by the general formula
(in the formula, R represents an aldopyranose radical from which the terminal
reducing hydroxyl group is excluded and n is from six to twenty). The external
diameter of the micro-tubular aggregated material is 10-300 nm, and the length
is 0.3-10 m. The micro-tubular aggregated material can be manufactured by
dispersing the asymmetric double-headed lipid described above in water at pH of
two to eight, next heating to 80-100 C. to dissolve it and then gradually
cooling the aqueous solution obtained.
