Tuesday, April 16, 2013

1304.3900 (Max Wolff et al.)

Depth resolved grazing incidence scattering from the solid-liquid

Max Wolff, Peter Kuhns, Andrew J C Dennison, Georg Liesche, Philipp Gutfreund, Sarah Rogers
We have applied small angle scattering in grazing incidence beam geometry on a time-of-flight neutron instrument. Due to the broad wavelength distribution provided for a specific incident beam angle the penetration depth of the neutron beam is varied over a broad range in a single measurement. The near surface structure of polymer micelles close to silicon substrates with distinct surface energy is resolved. It is observed that the very near-surface structure strongly depends on the surface coating whereas further away from the surface bulk like ordering is found. A more pronounced ordering is found close to surfaces with high surface energy.
View original: http://arxiv.org/abs/1304.3900

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