抄録
We have measured specular neutron reflectivity for a mixture film of dimyristoylphosphatidylcholine (DMPC) and Nal, spin-coated on a Si substrate. The repeat distance of bilayer stacking was drastically decreased at high temperature above chain-melting transition temperature, about 60°C, and the evaluated value was consistent with that in an ‘interdigitated gel’ phase. Also, we performed the time-resolved measurement of neutron reflectivity, and it was shown that the Bragg peak corresponding to the ‘interdigitated gel’ phase grows linearly with time when temperature is jumped to l20°C. This result is different from the time evolution of the transition observed in an aqueous solution systems, in which the ‘interdigitated gel’ phase grows exponentially with time on a pressure jump.
