Comment on “Shape fluctuations of microemulsion droplets: a neutron spin-echo study”

It is shown that the determination of the bending elastic constants of the surfactant film in droplet microemulsions from quasielastic neutron scattering experiments as presented recently [Coll. Surf. A 183–185 (2001) 159] is based on incorrect expressions describing the scattering on microemulsions and should be revised.