Interfacial properties of polystyrene thin films as revealed by neutron reflectivity.

Title Interfacial properties of polystyrene thin films as revealed by neutron reflectivity

Characterization of Polystyrene Thin Films Using X-Ray Reflectivity Undergraduate Researcher

Thin films of polystyrene on silicon substrate were investigated for thickness-dependent interface properties. To better understand the desirable electrical, mechanical, and optical properties of a polymer thin film, the interfacial structures must be first understood. Using x-ray reflectivity, data from polystyrene-air and polystyrene-silicon interfaces were collected and correlated with a the...

Distributions of glass-transition temperature and thermal expansivity in multilayered polystyrene thin films studied by neutron reflectivity.

We performed neutron reflectivity measurements on multilayered polymer thin films consisting of alternatively stacked deuterated polystyrene (d-PS) and hydrogenated polystyrene (h-PS) layers ∼200 Å thick as a function of temperature covering the glass-transition temperature T(g), and we found a wide distribution of T(g) as well as a distribution of the thermal expansivity α within the thin film...

Interfacial Structure and Properties in Polystyrene/Epoxy Bilayer Films

The interfacial structure and properties of immiscible deuterated polystyrene (dPS)/epoxy bilayer films were investigated with neutron reflectivity as functions of the composition of the epoxy layer, the thickness of the dPS layer, and the annealing time. We have found that the interfacial width and its growth rate depend strongly on the compositions of the epoxy layer but only weakly on the th...

اثرات نرمی پتانسیل بین سطوح بر روی بازتابندگی، فاز و قطبش نوترون‌های بازتابیده از لایه‌های مغناطیسی در بازتاب سنجی نوترونی

In the past decades, neutron reflectometry have flourished as an applicable method to the study of thin films. As an example, the type and thickness of an unknown thin film which is mounted on top of a magnetic substratum could be determined by measuring the intensity and polarization of the reflected neutrons from the sample. Neutron reflectometry is based on solving the one dimentional schröd...