A. M. Issa Shams , Manjunatha , A.S. Bennal , M.I. Sayyed
{"title":"Correlated experimental and theoretical study of PbO2BaO-CaO-B2O3Gd2O3 glasses with varying PbO2/CaO ratios for gamma-radiation protection","authors":"A. M. Issa Shams , Manjunatha , A.S. Bennal , M.I. Sayyed","doi":"10.1016/j.materresbull.2025.113792","DOIUrl":"10.1016/j.materresbull.2025.113792","url":null,"abstract":"<div><div>This study investigates the PbO<sub>2</sub>-BaO-CaO-B<sub>2</sub>O<sub>3</sub>-Gd<sub>2</sub>O<sub>3</sub> glass system, focusing on how varying PbO<sub>2</sub>/CaO composition ratios influence gamma-radiation shielding performance. The combined FTIR and XRD results establish that the samples retain their amorphous nature while undergoing significant short-range structural modifications. Both experimental measurements and theoretical modelling using Phy-X/PSD software were employed to assess mass attenuation coefficients (G<sub>MAC</sub>), linear attenuation coefficients (G<sub>LAC</sub>), half-value layer (G<sub>HVL</sub>), mean free path (G<sub>MFP</sub>), transmission factor (TF), and radiation protection efficiency (RPF) across gamma energies of 356, 511, 661.7, 1173.2, 1274.5, and 1332.5 keV. Experimental G<sub>MAC</sub> values closely aligned with theoretical data, with deviations under 6 %, validating the experimental approach. The present study outcomes reveal that increasing PbO<sub>2</sub>/CaO content enhances gamma shielding by raising density and photon interaction, with Pb15Ca16 showing superior attenuation, lowest HVL, TF and RPE above 50 % at 1 cm for 356 keV. These findings highlight Pb15Ca16 as a promising candidate for radiation shielding applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113792"},"PeriodicalIF":5.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Oxygen driven defect and spin engineering in Ba0.5Sr0.5Co0.8Fe0.2O3–δ at high temperatures","authors":"A.M. Shalamova , D.A. Shishkin , A.Yu. Suntsov","doi":"10.1016/j.materresbull.2025.113794","DOIUrl":"10.1016/j.materresbull.2025.113794","url":null,"abstract":"<div><div>Non-stiochiometric Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>3–</sub><em><sub>δ</sub></em> oxide and its aluminum doped derivative were synthesized via combustion of organometallic precursors. The oxygen content was measured with temperature/oxygen partial pressure by thermogravimetry and coulometric titration techniques. A consistent defect formation model was developed for the first time. Aluminum doping was shown to reduce oxygen content and promote cobalt reduction. The model incorporates the coexistence of energetically non-equivalent oxygen sites, which were explicitly utilized in simulations. Functional dependencies of equilibrium defect concentrations, derived directly from the proposed defect structure, enable deep analysis of spin distribution over the 3d cations. Analysis of <em>in-situ</em> temperature dependent magnetic susceptibility measurements directly linked spin configurations of Co and Fe ions to their local environment. The validated model provides a fundamental basis for the rational design of functional cobaltite perovskites for high-temperature redox and ion transport applications and offers a tool for interpreting future transport property studies and thermal expansion behavior.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"195 ","pages":"Article 113794"},"PeriodicalIF":5.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sub-terahertz absorption shielding performances of polyurethane - Carbon nanotubes composite foams","authors":"Ahmad Mamoun Khamis , Laetitia Urbanczyk , Christophe Detrembleur , Isabelle Huynen","doi":"10.1016/j.materresbull.2025.113793","DOIUrl":"10.1016/j.materresbull.2025.113793","url":null,"abstract":"<div><div>This study presents a novel investigation of the impact of multiwalled carbon nanotube (CNT) on the microstructure and electromagnetic shielding properties of polyurethane (PU) foams across an exceptional ultra-wideband frequency range, from 5.85 GHz to 330 GHz. The microstructure results show that the CNT formed an interconnected and well-distributed network on the PU surface. In addition, increasing CNT content from 1 wt.% to 11.2 wt.% significantly enhanced the total shielding effectiveness (SE<sub>T</sub>) by approximately four times over the whole frequency range. The absorption is identified as the main mechanism contributing to the SE<sub>T</sub> performance of our 2.4 mm-thick foamed composite samples, representing >98 % of the SE<sub>T</sub> above 40 GHz and up to 330 GHz. Hence, the corresponding absorption level achieved in this range is 13 – 45 dB. Our samples exhibit significant potential for electromagnetic interference shielding applications since they meet the standard commercial requirements.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113793"},"PeriodicalIF":5.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Manikanthababu , Subrata Karmakar , Ishtiaq Firoz Shiam , Injamamul Hoque Emu , Ariful Haque , Ravi Droopad
{"title":"A comparative high-temperature electrical study of single crystal and amorphous ZnGa2O4 as a gate dielectric in β-Ga2O3 MOSCAP devices","authors":"N. Manikanthababu , Subrata Karmakar , Ishtiaq Firoz Shiam , Injamamul Hoque Emu , Ariful Haque , Ravi Droopad","doi":"10.1016/j.materresbull.2025.113791","DOIUrl":"10.1016/j.materresbull.2025.113791","url":null,"abstract":"<div><div>Spinel ZnGa<sub>2</sub>O<sub>4</sub>, a wide bandgap semiconductor with high breakdown voltage and thermal stability, is promising for power electronics. Amorphous and single-crystal ZnGa<sub>2</sub>O<sub>4</sub> thin films were deposited on n-type β-Ga<sub>2</sub>O<sub>3</sub> substrates. Au/ZnGa<sub>2</sub>O<sub>4</sub>/β-Ga<sub>2</sub>O<sub>3</sub> MOSCAPs were evaluated up to 300 °C. Single-crystal (111) ZnGa<sub>2</sub>O<sub>4</sub> showed a 5.06 eV bandgap, confirmed by XPS. Reverse leakage current rose by nearly three orders of magnitude from room temperature to 300 °C. Poole–Frenkel (PF) analysis revealed a 0.58 V trap and 0.47–0.23 eV activation energy. Amorphous ZnGa<sub>2</sub>O<sub>4</sub> films (5.11 eV bandgap) exhibited leakage current increases of five orders of magnitude and PF traps at 0.6 V with 0.45–0.43 eV activation energies. C–V analysis showed significant flat-band voltage shifts and slope changes in both devices, indicating rising oxide and interface trap densities with temperature.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113791"},"PeriodicalIF":5.7,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jian Zhou , Qiaojun Liu , Hangfei Zhang , Yan Kong , Yanhong Li , Kui Huang
{"title":"Enhanced anion exchange membranes for efficient chlorine removal via polypyrrole, polyethyleneimine, and graphene oxide Co-deposition","authors":"Jian Zhou , Qiaojun Liu , Hangfei Zhang , Yan Kong , Yanhong Li , Kui Huang","doi":"10.1016/j.materresbull.2025.113782","DOIUrl":"10.1016/j.materresbull.2025.113782","url":null,"abstract":"<div><div>Anion exchange membranes polypyrrole-modified(PPy-M), polypyrrole-graphene oxide-modified(PPy-GO-M), and polypyrrole-polyethyleneimine-graphene oxide-modified(PPy-PEI-GO-M) were synthesized using in situ polymerization for advanced desulfurization wastewater treatment and cathodic scaling inhibition in membrane electrolysis(ME). Characterization by SEM-EDX(scanning electron microscope-energy-dispersive X-ray spectroscopy), AFM(Atomic force microscopy), FT-IR(Fourier-transform micro-infrared spectrometer), XPS(X-ray photoelectron spectroscopy), and Raman spectroscopy revealed the membranes morphology and chemical properties, and their basic performances, including ion exchange capacity, water uptake, contact angle, zeta potential,perm-selectivity, and the membrane resistance, were rough analyzed. PPy-PEI-GO-M showed the best performance, with an ion exchange capacity of 2.57 mmol g<sup>-1</sup>, contact angle of 85°, zeta potential of +15.59 mV, membrane resistance of 6.97 Ω cm<sup>2</sup>, and perm-selectivity of 98 %. Under optimal electrolysis conditions (ME time 180 min, temperature 30 °C, current density 40 mA cm<sup>-2</sup>, electrode spacing 4 cm), it achieved a Cl<sup>-</sup> removal rate of 96.83 % without cathodic scaling, with treated effluent successfully reused in a flue gas desulfurization system. This modified membrane shows strong potential for water treatment applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113782"},"PeriodicalIF":5.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enhanced Energy Harvesting of Novel Gd₂FeCrO₆ Double Perovskite Hydroelectric Cells with Sustained Voltage Discharge","authors":"Udhayasuriyan Venkatesan , Shanthi Subashchandran , V. Raghavendra Reddy , Raghavendra Babu Baskaran","doi":"10.1016/j.materresbull.2025.113783","DOIUrl":"10.1016/j.materresbull.2025.113783","url":null,"abstract":"<div><div>In the pursuit of sustainable energy generation and on-demand energy production, hydroelectric cell (HEC) is claimed to be a breakthrough renewable energy technology for harnessing the electrical energy via water splitting at ambient conditions. This study presents the pioneering Gd₂FeCrO₆ (GFCO) double perovskite HEC, synthesized via sol-gel auto-combustion, exhibiting a sevenfold output increase over non-perovskite HECs. Comprehensive characterization using XRD, TEM, FESEM, FTIR, BET-BJH, and XPS confirmed its crystallinity, morphology, functional groups, porosity, chemical states, and oxygen vacancies. Key performance metrics in the GFCO800 HEC (1.5 cm²), demonstrated a remarkable open-circuit voltage (1.18 V), peak current (2.69 mA), and achieved breakthrough sustained discharge stability over 10 h at 10 µA/cm². Four series-connected GFCO800 HEC powered a red LED for 20 minutes under outdoor conditions. These results highlight the GFCO HECs as carbon-neutral energy harvesting devices capable of hydrogen evolution and low-power operation, indicating their potential for portable and next-generation sustainable energy applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113783"},"PeriodicalIF":5.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Engineering of MIS interfaces using 2D gold nanoparticle monolayers for improved nano-Schottky tunneling diodes","authors":"Tholkappiyan Ramachandran , Hibah Shafeekali , Ashraf Ali , Lianxi Zheng , Haider Butt , Moh'd Rezeq","doi":"10.1016/j.materresbull.2025.113790","DOIUrl":"10.1016/j.materresbull.2025.113790","url":null,"abstract":"<div><div>Schottky diodes are a fundamental component of semiconductor technology, primarily due to their distinctive rectifying behavior at metal–semiconductor (M–S) interfaces. This research investigates the potential of nanoscale Schottky-type contacts to overcome conventional CMOS scaling limitations by leveraging enhanced quantum tunneling and thermionic emission across engineered interfaces. A novel metal–insulator–semiconductor (MIS) diode architecture is developed by integrating a two-dimensional (2D) monolayer of gold nanoparticles (Au-NPs) onto an n-type silicon (n-Si) substrate, separated by a thin SiO₂ insulating layer. The study systematically explores the influence of Au-NP diameters (20 nm, 30 nm, and 40 nm) on charge transport mechanisms. Nanoparticle monolayers were fabricated via drop-casting under an external electric field to ensure uniform alignment. Structural characterization confirmed well-distributed and high-quality monolayers. Electrical measurements revealed a strong size-dependent behavior: the 20 nm Au-NP-based diode exhibited the highest reverse-bias tunneling current (–0.2234 mA at –3.6 V), the lowest contact resistance, and the smallest effective contact area due to enhanced electric field localization. Diodes with larger particles showed reduced tunneling efficiency and higher resistive losses. COMSOL simulations supported the experimental findings, demonstrating that smaller Au-NPs generate higher electric field intensities (4.15 × 10⁸ V/m) at the interface, significantly boosting tunneling probability. These results demonstrate that Au-NP monolayers can be precisely engineered to enhance charge transport across MIS junctions, offering a scalable pathway for high-performance nanoelectronic and optoelectronic devices.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113790"},"PeriodicalIF":5.7,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Peng Gao , Pengqi Gong , Ying Yang , Xue Zhou , Yanan Zhang , Yong Zhao , Stephen C. Warren-Smith , Linh Viet Nguyen , Xuegang Li
{"title":"Dual-mode optical fiber sensor with polydopamine-functionalized surface and PDMS-enhanced temperature compensation for ultrasensitive HCG detection","authors":"Peng Gao , Pengqi Gong , Ying Yang , Xue Zhou , Yanan Zhang , Yong Zhao , Stephen C. Warren-Smith , Linh Viet Nguyen , Xuegang Li","doi":"10.1016/j.materresbull.2025.113787","DOIUrl":"10.1016/j.materresbull.2025.113787","url":null,"abstract":"<div><div>This study introduces a temperature-compensated dual-mode optical fiber sensor for ultrasensitive human chorionic gonadotropin (HCG) detection, integrating polydopamine (PDA) nanostructures with polydimethylsiloxane (PDMS)-modified microcavities. The hybrid design synergistically enhances surface plasmon resonance (SPR) and Fabry-Pérot (FP) responses through engineered material interfaces. PDA enables efficient antibody immobilization via amine coupling, while PDMS simultaneously acts as a thermal expansion compensator and optical phase modulator, overcoming temperature-induced signal drift in conventional biosensors. The system demonstrates dual refractive index sensitivity (1875 nm/RIU) and differentiated temperature responses (-0.12 nm/ °C SPR vs. -0.61 nm/ °C FP), enabling environmental decoupling through matrix analysis. The sensor achieves record HCG detection performance with 1.54 nm/(mIU/mL) sensitivity and 0.01 mIU/mL detection limit. This materials-driven approach merges functional polymer engineering with photonic design, establishing a new paradigm for field-deployable lab-on-fiber biosensors. The work advances multiplexed optical sensing technologies for point-of-care diagnostics and smart medical materials development.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113787"},"PeriodicalIF":5.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Upcycling waste polyethylene terephthalate into versatile and reusable adsorbents for sustainable water purification","authors":"Hui Guo, Fei Zeng, Dan Zhang, Wenbiao Xu","doi":"10.1016/j.materresbull.2025.113788","DOIUrl":"10.1016/j.materresbull.2025.113788","url":null,"abstract":"<div><div>This study developed a sustainable method to address plastic waste and water pollution by transforming discarded polyethylene terephthalate (PET) into high-efficiency dye adsorbents. Through thermal carbonization of waste PET followed by hydrothermal immobilization of heteropoly acid H<sub>5</sub>[PMo<sub>10</sub>V<sub>2</sub>O<sub>40</sub>] (PMoV), we developed a novel series of PMoV@C-PET-X materials. The optimized PMoV@C-PET-30 achieved complete methylene blue (MB) adsorption in 5 min under mild conditions via synergistic electrostatic, π-π, and η-π interactions. Comprehensive characterization confirmed the material’s porous, graphitized carbon structure and uniform active site distribution. The adsorption mechanism transitioned from chemisorption-dominated (low concentrations) to combined physisorption / chemisorption (high concentrations). The material demonstrated excellent environmental stability (resisting cations, anions, and humic acid (HA)), versatile dye removal (anionic / neutral dyes), and remarkable reusability. The work presents an innovative approach to convert waste plastics into effective wastewater treatment materials, simultaneously tackling plastic and water pollution with strong scalability potential.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113788"},"PeriodicalIF":5.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optical, photon interaction, and radiation shielding performance of Ho2O3-doped borate glasses modified with ZnO and CaO","authors":"M. Kh. Hamad","doi":"10.1016/j.materresbull.2025.113785","DOIUrl":"10.1016/j.materresbull.2025.113785","url":null,"abstract":"<div><div>In this work, a series of Ho<sub>2</sub>O<sub>3</sub>-doped borate-based glasses modified with ZnO and CaO were synthesized using the melt-quenching technique and systematically investigated. The experimental mass density increased from 2.98 g/cm<sup>3</sup> to 3.29 g/cm<sup>3</sup> with modifiers, directly enhancing photon interaction probability. The Tauc plot analysis showed a decrease in optical band gap from 3.879 to 3.739 eV. Geant4 Monte Carlo simulations agreed well with XCOM predictions, with deviations below 4 %, further validated by the Kolmogorov-Smirnov test (D<sub>max</sub> < 0.89 %, p ∼1). At 0.5 MeV, linear attenuation coefficient (<span><math><mi>μ</mi></math></span>) ranged from 0.260 cm<sup>-1</sup> to 0.287 cm<sup>-1</sup>, surpassing several standard shielding materials. Different shielding parameters have also been calculated and assessed in this study. SRIM analysis showed stopping powers peaking at low energies, with alpha particles exhibiting higher −dE/dx and shorter ranges than protons. Overall, the combination of high transparency, density-driven photon attenuation, and rare-earth contributions make these glass systems promising for optical devices, medical windows, and radiation protection.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"194 ","pages":"Article 113785"},"PeriodicalIF":5.7,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}