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T. Hesabizadeh^a, R. Subedi^a, T. J. Webster^b,c,d, G. Guisbiers^a,*
Chalcogenide Letters, Vol.21, No.11, pp. 847-854, 2024, DOI:10.15251/CL.2024.2111.847
Abstract Amorphous selenium nanoparticles have been synthesized by pulsed laser ablation in liquids. After undergoing a thermal treatment at 121°C for 60 minutes, the amorphous nanoparticles crystallized into trigonal ones. The antimicrobial properties of both amorphous and trigonal nanoparticles have been compared; and the amorphous ones displayed better antibacterial and antifungal properties compared to the trigonal ones. Specifically, Methicillin-resistant Staphylococcus aureus (MRSA), Ampicillin-resistant Escherichia coli, Pseudomonas aeruginosa, Staphylococcus epidermidis, and Candida albicans were almost completely inhibited in the presence of amorphous selenium nanoparticles at 0.025 microgram/ml concentrations after 24 hours of in vitro culture, compared to controls (no nanoparticles). In summary, More >

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H. R. Hassan, A. N. Abd^*, M. J. M. Ali
Chalcogenide Letters, Vol.21, No.11, pp. 855-866, 2024, DOI:10.15251/CL.2024.2111.855
Abstract Using a laser energy of no more than 600 mJ/pulse and a maximum of 500 pulses, this work selectively produced pure copper, indium, gallium, and selenide (CIGS) NPs using a laser ablation method with distilled water and n-type porous silicon prepared by the photoelectron etching method. The material exhibits quantum dot behavior, according to experimental investigations. Porous silicone bases were produced using a current density of 10 mA/cm2 and an etching time of 15 min. Tests XRD, SEM, AFM, FTIR, UV, PL were conducted for the porous silicone and CIGS NPs to ensure that each More >

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M. Temiz^a,*, S. Çelik^b
Chalcogenide Letters, Vol.21, No.11, pp. 867-872, 2024, DOI:10.15251/CL.2024.2111.867
Abstract Ternary thin films have garnered significant attention due to their adjustable band gap characteristics, making them suitable for many applications. In this research, we examined the structural and optical characteristics of PbZnS thin films fabricated onto glass substrates employing the spray pyrolysis techniuqe. The films were fabricated at different temperatures ranging from 300 to 400°C. X-ray diffraction (XRD) analysis indicated that all films displayed a cubic structure with a preferred orientation along the (200) plane. From the analysis of XRD peaks, it was observed that the crystal structure initially improved with increasing temperature but then More >

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Areej S. Alqarni^a,*, I. Bulus^b, M. Abioye^c
Chalcogenide Letters, Vol.21, No.11, pp. 873-884, 2024, DOI:10.15251/CL.2024.2111.873
Abstract To unveiled the function of exchanging Sm₂O₃ for B₂O₃ on the physical and mechanostructural traits of multi-component glass, five distinct type (A, B, C, D and E) of glasses originated from (50-x)B₂O₃-10P₂O₅-30TeO₂-10ZnO-xSm₂O₃ (0.1≤x≤1.5, mol%) compositions were fabricated by using ordinary approach of melt-quenching. The noncrystallinity status of the synthesized samples was established by X-ray diffraction (XRD) profile. However, with sequential replacement of B₂O₃ by Sm₂O₃, the deduced values of physical entities such as density (d₃), Sm3+ ions concentration (N_i), field strength (F) and glass hardness (H_v) of our produced glasses were significantly amplified, while the molar volume (V_m) alongside polaron More >

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S. M. Hadi^*, I. H. Khudayer
Chalcogenide Letters, Vol.21, No.11, pp. 885-893, 2024, DOI:10.15251/CL.2024.2111.885
Abstract Chalcogenide have attracted great interest over the last years due to their thermal, electrical and optical properties. Understanding the crystal structures of chalcogenide is crucial in the hunt for novel materials. In this study, we prepared Cu₂Se_0.8Te_0.2 thin film on a glass substrate using thermal evaporation method and then annealed at different temperatures (403, 453 &503) K to study the effect of annealing on the structure and optical properties of the film, we find that Cu₂Se_0.8Te_0.2 the composition is cubic structural and this is shown by X-ray analyses. And the optical properties improve with different annealing More >

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A. Fatima^a, N. Nadeem^a, Bahaa Saleh^b, Z. A. Rehan^c, S. Noreen^a, Hafiz T. Ali^b, M. Zahid^a,*
Chalcogenide Letters, Vol.21, No.11, pp. 895-915, 2024, DOI:10.15251/CL.2024.2111.895
Abstract The current research work investigated the photocatalytic degradation of dye using polythiophene-based silver-doped zinc sulfide (PT/Ag-ZnS). The ternary composite was synthesized by in-situ chemical oxidation polymerization approach and thoroughly characterized. Maximum photocatalytic activity depicted > 80% for Ag-ZnS and > 94% for PT/Ag-ZnS at pH 7 and 4 respectively at 10 mM oxidant and 30 mg/100 mL catalyst dose, 10 ppm IDC under 90 min. DMSO serves as an effective radical scavenger. The novel polymeric composite exhibits efficient reusability upto five cycles. Pseudo 1^st -order kinetic model was best fitted for PT/Ag-ZnS. Toxicity analysis gave a More >

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L. Bouras^a, A. Beggas^a,*, D. Sahnoune^b, M. Ghougali^a, R. Ferhat^a
Chalcogenide Letters, Vol.21, No.11, pp. 917-926, 2024, DOI:10.15251/CL.2024.2111.917
Abstract The present study intends to provide the impact of nitric acid on the structural and optical characteristics of thin films of ZnO. The latter was grown on substrates of glass via spray pyrolysis with 400°C, using Zinc acetate aqueous solution acidified by different amounts of nitric acid to obtain a pH ranging from 6.8 to 2.9. The film properties were analyzed as a function of pH. In the light of the XRD analysis, all the films have a preferential direction along the (002) plane. Depending on pH conditions, the crystal size increased from 32.38 to More >

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R. I. Alekberov^a,b, S. I. Mekhtiyeva^a, S. M. Mammadov^a,*, H. İ. Mammadova^a,c, B. G. Ibragimov^d,a, M. V. Kazimov^a, V. N. Poladova^e
Chalcogenide Letters, Vol.21, No.11, pp. 927-931, 2024, DOI:10.15251/CL.2024.2111.927
Abstract The volt-ampere characteristic of Al-Ge₃₃As₁₇S₃₅Se₁₅-Te sandwich structures in the medium of butane gas and benzene vapors was measured in direct current mode. The molar percentage of elements in the composition of the substance Al-Ge₃₃As₁₇S₃₅Se₁₅ synthesized for experiments, and the amorphous structure of the substance were determined by energy dispersive spectroscopy and X-ray diffraction scattering. The images on 2D and 3D diagrams of the influence of the butane gas and benzene vapor environment on the electrical resistance of the substance under study show that the change in the resistance value noticeably depends on the composition and type More >

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Z. Khan^a, A. D. Khalid^b,*, M. I. Khan^c, B. Parveen^a, Ihab M. Moussa^d, M. S. Hassan^e, N.-ur-Rehman^f, A. K. Khan^f, S. Mumtaz^g
Chalcogenide Letters, Vol.21, No.11, pp. 933-943, 2024, DOI:10.15251/CL.2024.2111.933
Abstract The three samples of SnS with different molarity 1ml, 0.5ml and 0.25ml were prepared by hydrothermal method. The prepared samples were characterized by XRD, SEM and impedance spectroscopies. XRD confirmed the cubic and orthorhombic structure of SnS. The average size of nanoparticles was noted to be about 12.77 nm, 16.43 nm and 16.44 nm at 140 °C. These nanoparticles were of cubic and orthorhombic forms. Average strain came out to be 0.215, 0.142 and 0.140. This result shows that by changing molarity, crystal structure of SnS can be changed. Crystallite size is increasing with decreasing… More >

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Z. J. Kadhim^a, O. A. Hatem^b,*, D. M. Al Khafaf^c
Chalcogenide Letters, Vol.21, No.11, pp. 945-952, 2024, DOI:10.15251/CL.2024.2111.945
Abstract The synthesis and characterization of reduced graphene oxide/cadmium sulfide (rGO/CdS) are the primary topics covered in this paper. The construction of a photoanode in dyesensitized solar cells (DSSCs) using synthetic materials is subsequently proposed. Here, graphene oxide (GO) was synthesized using the Hummer's method, and green tea leaves were employed to reduce GO. The rGO/CdS nanocomposites were prepared using a hydrothermal method. A photoanode was fabricated from the as-prepared rGO/CdS nanocomposite paste using doctor blade deposition techniques.
The performance of the fabricated DSSCs was evaluated using current density-voltage (JV) curves. Transmission electron microscopy (TEM), X-ray… More >

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W. Abbas^a,*, A. Mahmood^b, W. Al-Masry^b, C. W. Dunnill^c
Chalcogenide Letters, Vol.21, No.11, pp. 953-963, 2024, DOI:10.15251/CL.2024.2111.953
Abstract A supercapattery merges the advantageous characteristics of batteries and supercapacitors (SCs). During this research, we synthesized strontium sulfide (SrS) using the hydrothermal method, and then we doped it with nitrogen/graphene quantum dots (N-GQDs). For SrS/NGQDs, the Brunauer-Emmett-Teller (BET) analysis determined the total surface area to be 15.50 m² /g. Using the three-electrode assembly, the composite strontium sulfide (SrS/NGQDs) revealed a specific capacity (C_s) of 737 Cg^-1 . Battery-graded SrS/N-GQDs was utilized as anode and activated carbon (AC) as cathode to assemble a hybrid supercapacitor (SC). It delivered a remarkable power density of 1440 Wkg^-1 , the SrS/N-GQDs//AC More >

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