Browsing by Author "Abed Mohamed Affoune"
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Item Electrodeposition of SnS Thin film Solar Cells in the Presence of Sodium Citrate(J. Electrochem. Sci. Technol., 2017, 8(3), 206-214, 2017) Rafiaa Kihal; Hassiba Rahal; Abed Mohamed Affoune; Mokhtar GhersSnS films have been prepared by electrodeposition technique onto Cu and ITO substrates using acidic solutions containing tin chloride and sodium thiosulfate with sodium citrate as an additive. The effects of sodium citrate on the electrochemical behavior of electrolyte bath containing tin chloride and sodium thiosulfate were investigated by cyclic voltammetry and chronoamperometry techniques. Deposited films were characterized by XRD, FTIR, SEM, optical, photoelectrochemical, and electrical measurements. XRD data showed that deposited SnS with sodium citrate on both substrates were polycrystalline with orthorhombic structures and preferential orientations along (111) directions. However, SnS films with sodium citrate on Cu substrate exhibited a good crystalline structure if compared with that deposited on ITO substrates. FTIR results confirmed the presence of SnS films at peaks 1384 and 560 cm-1. SEM images revealed that SnS with sodium citrate on Cu substrate are well covered with a smooth and uniform surface morphology than deposited on ITO substrate. The direct band gap of the films is about 1.3 eV. p-type semiconductor conduction of SnS was confirmed by photoelectrochemical and Hall Effect measurements. Electrical properties of SnS films showed a low electrical resistivity of 30 Ω cm, carrier concentration of 2.6 × 1015 cm-3 and mobility of 80 cm2 V-1 s-1.Item In Situ Growth of Ni(OH)2 Nanoparticles on 316L Stainless Steel Foam: An Efficient Three-dimensional Nonenzymatic Glucose Electrochemical Sensor in Real Human Blood Serum Samples(Electroanalysis, 2022) Widad Drissi; Mohamed Lyamine Chelaghmia; Mouna Nacef; Abed Mohamed Affoune; Hamid Satha; Rafiaa KihalFor the first time, nickel hydroxide nanoparticles (Ni(OH)2 NPs) grown on 316L stainless steel foam were used as a non-enzymatic electrochemical glucose sensor. The Ni(OH)2/SSF-316L was elaborated by applying a simple ultrafast CV method without nickel salts addition. Ni(OH)2/SSF-316L was characterized by SEM and XRD. The electrochemical behavior was investigated by CV, EIS, and amperometric measurements. The fabricated sensor revealed higher sensitivity 1062 μA mM 1cm 2, wide linear range from 1.0 μM to 4.0 mM with a low detection limit of 2.0 μM and good selectivity. In addition, real sample analysis was performed for controlled glucose in real blood serum.