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The nanostructured SnS thin films were obtained by a low-cost chemical spray pyrolysis method (CSP). The optical and structural parameters of SnS nano films were studied by different thickness. X-ray diffraction showed that films were of orthorhombic structure with preferred orientation in the (111) direction. These films reveal a decrease in crystallite due to thickness film increasing. Results indicated that films showed < 70% of transparency in visible region. The same behavior was noticed for the optical bandgap. Results obtained by dispersion parameters mention thickness dependency. [ABSTRACT FROM AUTHOR]

The present paper present a study on the influence of polymer density on fiber formation by different polymers when using the electro-hydrodynamic (EHD) process. Parameters, such as the internal pressure, radius of fibers and the viscosity force were determined in function of the distance between electrodes. The studies were done for different polymer densities (0.481, 0.529, 0.609, 0.705, 0.9249) g/cm3. It was found that it is an important parameter influencing internal polymer pressure, diameter of produced nanofibers. The polymer density impacts also on the viscosity force. All these parameter: internal polymer pressure, radius of nanofibers depend on the distance between the electrodes. [ABSTRACT FROM AUTHOR]