Toni Dwi Novianto^1,2, Sri Rahayoe^1,*, Bakti Berlyanto Sedayu^2,*

Journal of Renewable Materials, Vol.13, No.2, pp. 385-400, 2025, DOI:10.32604/jrm.2024.057313 - 20 February 2025

Abstract This study aimed to develop and characterize biodegradable packaging film from blends of two natural polysaccharides, i.e., agar and glucomannan. The glucomannan used was derived from the specific tuber plant Amorphophallus oncophyllus (locally known as “porang”), which grows abundantly in Indonesian forests and remains underutilized. Various ratios of agar and porang-glucomannan (PG) proportions were formulated to produce a food packaging film, which was subsequently tested for its mechanical, physical, chemical, and thermal properties. The results showed that the inclusion of PG to the film formulations notably enhanced the stretchability of agar films, achieving maximum a… More > Graphic Abstract

María Fernanda Cardona Lunar¹, Ramón Ordoñez², Heidi Fonseca Florido³, Joaquín Hernández-Fernández^4,5,6, Rodrigo Ortega-Toro^1,*

Journal of Renewable Materials, Vol.13, No.2, pp. 311-327, 2025, DOI:10.32604/jrm.2024.056639 - 20 February 2025

Abstract The extensive use of polymeric materials in single-use packaging has driven the need to develop biodegradable alternatives. This study investigates the incorporation of graphene oxide (GO) and Moringa oleifera seed oil (MOSO) into a gelatin matrix to create polymer films and evaluate their potential as active packaging materials. The properties of these films were evaluated using structural, thermal, mechanical, optical, and physicochemical methods to determine their suitability for food packaging applications. The results showed that GO and MOSO were homogeneously dispersed in the gelatin matrix, forming colloidal particles (around 5 µm in diameter). The addition… More > Graphic Abstract

A. N. Abouelkhir^a,*, E. R. Shaaban^b,c, M. Tag El-Dine^a, K. I. Hussain^d, I. S. Yahia^e

Chalcogenide Letters, Vol.21, No.2, pp. 161-168, 2024, DOI:10.15251/CL.2024.212.161

Abstract Cadmium sulfide was prepared by first turning it into a powder, which was then used to evaporate heat to create thin films. Additionally, the spray pyrolysis method was used to produce films of cadmium sulfide. A structural comparison using the crystallize size and lattice parameters. Furthermore for the prepared samples, an analysis of their optical characteristics was conducted through measurements of absorbance, transmission, and reflection, resulting in the determination of the energy gap. More >

M. A. Hussain^a,*, P. J. Saikia^b, S. R. Devi^a, L. R. Singh^c

Chalcogenide Letters, Vol.21, No.2, pp. 151-159, 2024, DOI:10.15251/CL.2024.212.151

Abstract Nickel (Ni⁺²) doped nanocrystalline Bi₂S₃ thin films are deposited on the glass substrate from the solutions containing Bismuth Nitrate, Ethylenediamine Tetraacetic acid (EDTA) and Thioacetamide at a bath deposition temperature of 318K. The optical, surface morphological and electrical properties of Ni-doped Bi₂S₃ thin films prepared at three different doping concentration are investigate by using ultraviolet–visible transmission spectra (UV–Vis), Scanning electron microscopy (SEM), Energy Dispersive X-ray (EDAX) and thermo-e.m.f. techniques. The optical band gap energies are found in between 2.32-2.43 eV. The SEM images show that the prepared films are continuous, dense and distributed over the entire area More >

M. Jabeen^a, N. Ali^b,*, Z. Ali^c, H. Ali^b, A. A. A. Bahajjaj^d, B. Haq^e, S. H. Kim^e

Chalcogenide Letters, Vol.21, No.2, pp. 125-133, 2024, DOI:10.15251/CL.2024.212.125

Abstract In this study, Tin selenide (SnSe) was prepared via thermal evaporation from tin ingots and selenium powder followed by annealing at 250°C in an inert atmosphere of Argon gas. Two samples were used for characterization purposes, as-deposited and annealed. The structural parameters including particle size, strain, dislocation density, and number of crystallites per unit area were calculated from XRD while the optical properties including band gap were extracted from UV-visible spectroscopy. Four probe techniques were used to measure the electrical properties. More >

A. A. Mansour^a, H. A. Salman^b, S. A. Abdul Wahab^c, N. F. Habubi^c, S. S. Chiad^d,*, Z. S. A. Mosa^c, Y. H. Kadhim^d

Chalcogenide Letters, Vol.21, No.3, pp. 275-284, 2024, DOI:10.15251/CL.2024.213.275

Abstract To grow SnS films, the spray pyrolysis deposition (SPD) process is applied. The films were deposited at various substrate temperatures (S_T) of 400, 450, and 500 degrees Celsius for two hours. Through XRD analysis, the impact of ST on the structure was investigated. Peak (113) crystallite sizes were 13.16, 21.48, and 38.87 nm, respectively, at base temperatures of (400, 450, and 500) ℃. The effect of ST on the structure was examined using XRD analysis. A predominat Peak at (113) plane. The crystallite sizes at base temperatures of (400, 450, and 500) ℃ were 13.16, 21.48, More >

A. B. Alwany^a,*, A. Alnakhlani^a,b, B. Hassan^a,b, M. A. Algradee^a, R. A. Fouad^b, A. A. Alfaqeer^c

Chalcogenide Letters, Vol.21, No.1, pp. 99-112, 2024, DOI:10.15251/CL.2024.211.99

Abstract Thermal evaporation technique was used to prepare Cu₁₃Se₅₂Bi₃₅ thin films. The asdeposited and annealed samples were investigated by using the X-ray diffraction (XRD), scanning electron microscopy (SEM) and optical transmission and reflection. The XRD showed that the as-deposited film is crystalline in nature, and the crystalline size of samples increased with increasing the annealing temperature. SEM images showed that the morphology of the sample changes with the annealing temperature. The direct transition of the optical band gap (E_g) of Cu₁₃Se₅₂Bi₃₅ films was observed and the values of E_g decreased with increasing the annealing temperature. Other optical parameters More >

K. I. Hussain^a, A. Ashour^b, E. S. Yousef^c, E. R. Shaaban^b,d,*

Chalcogenide Letters, Vol.21, No.1, pp. 65-80, 2024, DOI:10.15251/CL.2024.211.65

Abstract The present work has examined the thermal features of glassy chacogenide materials Se0.75-xTe0.25Agx (x = 0, 2, 4, 6, 8, 10 at %). The thermal stability of these compositions has been assessed under non-isothermal conditions using Differential Scanning Calorimetry (DSC), which has been used to find the glass transition temperature (Tg), the initial crystallization temperature (Tin), the temperature corresponding to the top of the crystallization rate (Tp), and the melting temperature (Tm). In addition, the kinetic parameter Kr(T) was given as an additional sign of thermal stability. Among these compositions, it was discovered that Se0.71Te0.25Ag0.04… More >

W. H. Albanda^a, M. H. Saeed^a, M. Z. Abdullah^b, M. H. Al-Timimi^c,*

Chalcogenide Letters, Vol.21, No.5, pp. 439-447, 2024, DOI:10.15251/CL.2024.215.439

Abstract In this study, CdS: MgO films were synthesized using the chemical spray pyrolysis method, varying the film thickness. X-ray diffraction (XRD) analysis confirmed the polycrystalline nature of the films, with an observed increase in average crystallite size corresponding to thicker films, and The films' surface morphology indicates an absence of crystal defects such as holes and voids . The investigation of energy gap and optical parameters revealed a dependency on film thickness, with the energy gap shifting from 2.412 eV for a thickness of 150 nm to 2.354 eV for a thickness of 750 nm. More >

P. Chaiworn^a, S. Kaewja^a, E. Wongrat^b,c, C. Wichasilp^a, A. Tubtimtae^d,*

Chalcogenide Letters, Vol.21, No.5, pp. 423-429, 2024, DOI:10.15251/CL.2024.215.423

Abstract Bismuth antimony telluride (Bi_2-xSb_xTe₃) thin films were synthesized using chemical bath deposition (CBD) with various amounts of antimony. The structural, morphological, and optical properties of Bi_2-xSb_xTe₃ thin films have been scrutinized using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), UV-Vis spectrophotometry. A higher amount of Sb contents can be observed the Sb_0.405Te_0.595, BiTe, and Bi₄Te₃ phases consisted in the pattern. Meanwhile, the energy band gaps are tuned in the range of 2.95 to 3.30 eV. Finally, measurement of resistance with various temperatures for activation energy (E_AC) estimation was performed. The highest E_AC value was equal to 0.654 More >