NANOSIZE STRUCTURE OF SELF-ASSEMBLY SODIUM DODECYL SULFATE A STUDY BY SMALL ANGLE NEUTRON SCATTERING (SANS)

Small Angle Neutron Scattering (SANS) investigation on the self-assembly sodium dodecyl sulfate (SDS)
molecules as a function of concentration and additives has been carried out. SANS spectrometer which has been
completely installed at the neutron scattering laboratory (NSL) BATAN in Serpong, Indonesia has played most
important role to determine the growth (size) and also the shapes of a micelle structure. In this works we report that
spherical micelle structure with a radius of 16.7 Å will transform to ellipsoidal or rod-like micelle structure with the
long axis extends up to 50 Å by increasing the concentration of SDS. Similar to that the micelle structures change by
addition of salt in SDS micellar solutions.