Abstract

X-ray standing wave enhanced scattering effects are observed in mesoporous silica thin films (MSTFs) deposited on rough indium tin oxide coated glass substrates in grazing-incidence small-angle x-ray scattering studies. The distorted-wave Born approximation theory along with a rigorous wave function analysis is employed to elucidate the dynamical scattering processes occurring in MSTFs. The data analysis is significantly simplified by expressing the x-ray scattering intensity from MSTFs in two separate functions of the wave vector transfer, where the in-plane correlation between neighboring mesopore channels is decoupled from the out-of-plane interference interaction. Remarkable agreement is achieved between experiment and theory.

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