  We have combined neutron reflectometry with rheology in order to investigate
the solid boundary of liquids and polymers under shear deformation. Our
approach allows one to apply a controlled stress to a material while resolving
the structural arrangements on the sub nanometer length scale with neutron
reflectivity, off-specular and small angle scattering at the same time. The
specularly reflected neutron intensity of a 20 % by weight solution of the
Pluronic F127 in deuterated water is evaluated. We find pronounced changes in
the near interface structure under applied deformation for surfaces with
different surface energies, which are correlated with changes in the storage
and loss modulus.
