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PA6-Se-Cd composites were obtained by two-step assembly synthesis route. Firstly, a chemical bath deposition method was employed for preparation of PA6-Se precursors at room temperature using H2SeO3 and Na2SO3 solutions. These chalcogenized polymers further serve as proxies for cadmium selenide formation. The formation of CdSe is attained by exposing the PA6-Se precursor into a Cd(CH3COO)2 solution at different temperatures. The obtained composites were characterized by atomic absorption spectroscopy, optical microscopy and X-ray diffraction analysis. The Se consumption rate represents a global reaction system because it depends on the simultaneous occurrence of the heterogeneous reaction between Cd2+ ions and Se in the polyamide 6 (PA6) matrix and the selenium washout from polymer. The prepared PA6-Se-Cd composites are reproducible, uniform and pinhole-free. X-ray diffraction analysis showed the formation of cadmium selenide (CdSe) and selenium (Se8) phases with a hexagonal and a monoclinic unit cell, respectively. [ABSTRACT FROM AUTHOR]

Copper sulphide layers were deposited on the home-made polycarbonate (PC) plates by the chemical bath deposition (CBD) method. The layers were characterized by X-ray diffraction (XRD), optical microscopy (OM), Fourier transform infrared (FT-IR) spectroscopy. X-ray diffraction analysis showed that the layers are composed of covellite (CuS) and chalcocite (Cu2S) phases with a hexagonal and a monoclinic unit cell, respectively. The spherical particles of Cu2-xS with a size range of 1-27 μm in diameter were deposited depending on the number of deposition cycles. The room temperature sheet resistance of Cu2-xS layers deposited on PC plates is 1.13 kΩ/cm² after the fourth deposition cycle. [ABSTRACT FROM AUTHOR]

Thin films of Ag2S were deposited at room temperature on non-oriented isotactic polypropylene substrates immersed in a bath mixture containing aqueous solutions of silver nitrate, AgNO3, for silver ion source, sodium thiosulfate, Na2S2O3, for sulfide ion source and as a complexing agent, and nitric acid, HNO3, for pH adjustment. Film samples were characterised by X-ray photoelectron spectroscopy (XPS) and chemical analysis. XPS analysis confirmed that a layer of Ag2S was formed on the surface of the polypropylene film. The films were studied for their electrical conductivity and the results showed that the measured electrical sheet resistance depended on Ag : S ratio. A non-destructive millimeter wave analysis showed that distribution of Ag2S particles according to resistivity distribution on the PP samples area is homogenous. [ABSTRACT FROM AUTHOR]

Layers of silver sulfide, Ag2S, on the surface of polypropylene (PP) film were formed by the chemical bath deposition method (CBD). An initial treatment of PP with modifiers is required in order to provide the adherence to the polymer surface. Film samples were characterized by X-ray diffractometry (XRD), optical microscopy, scanning electron microscopy (SEM) / energy dispersive X-Ray (EDX) analysis and atomic force microscopy (AFM). XRD and EDX methods confirmed that on the surface of the polypropylene film a layer of silver sulfide was formed. The surface morphology, texture and uniformity of the silver sulfide layers formed on the PP surface depend on the number of polymer immersions into the precursor solution. The formation of silver sulfide layers proceeded irregularly in the form of islands which grew into larger agglomerates. [ABSTRACT FROM AUTHOR]

Layers of silver sulfide, Ag2S, on the PA film surface were formed by the chemical bath deposition method (CBD). Film samples were exposed in acidified solutions of silver nitrate, AgNO3, and sodium thiosulfate, Na2S2O3. Zeta potential (ζ) measurement was applied for estimating the stability of colloidal particles obtained by the reaction from AgNO3 and excess of Na2S2O3 solutions at pH 2.3 and 20 °C, respectively. Samples prepared as Ag2S gave multiple reflections, all corresponding to monoclinic Ag2S (acanthite). The morphology of polyamide PA films modified by silver sulfide layers was studied by the atomic force microscopy method. The formation of silver sulfide layers proceeded unevenly, in the form of islands, which later grew into agglomerates. The surface of the formed layers was relatively uneven and rather rough. The average height of Ag2S layer increased (~145 - ~1 093 nm) with the increasing exposure time of PA treatment in solutions. The layer roughness varied from ~32 to ~244 nm and with the increasing exposure time in precursor solutions regularly increased and caused changes of the shape distribution function of the surface elements. [ABSTRACT FROM AUTHOR]