jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Qianqian Chen | Li Cuiyan | Haibo Ouyang | Yanlei Li | Zihao Chen | Shen Tianzhan | Bao Leer | Qiaoqiao Wang | Jiaqi Liu | Li Wang | He Mengyao | Sirui Wu
Source: High-temperature materials. (article, 2025-01-01)
Field: Materials Science — Ceramics and Composites

Enhancing Ablation Resistance of C/C-HfC-SiC Composites by In-Situ Growth of HfC Nanowires C/C-HfC-SiC composites are promising ablation-resistant ultra-high temperature thermal protection materials. To further enhance their performance in extreme thermal environments, the introduction of HfC nanowires (HfCNWs) into the composite has been identified as an effective strategy. The quantity and morphology of the introduced HfCNWs significantly influence the ablation resistance of the composites. In this study, by controlling the concentration of Ni salt during the hydrothermal synthesis process, the loading amount of Ni catalysts on the surface of carbon fibers was regulated, thereby achieving control over the quantity and structure of HfCNWs in the C/C-HfC-SiC composites. It was found that a low Ni loading facilitates the growth of sparse and slender HfCNWs. As the Ni loading increases, the number of HfCNWs rises, gradually evolving into a high-density, multi-oriented network structure. However, excessive Ni tends to induce short, thick, and clustered growth of the nanowires. Based on this, three types of HfCNWs-modified C/C-HfC-SiC composites were prepared using the polymer impregnation and pyrolysis (PIP) process. The quantity and diameter of the HfCNWs significantly affect the ablation resistance of the composites. Among them, the composite prepared with a 4.38 wt% Ni loading exhibited excellent ablation resistance, with mass and linear ablation rates of 0.47 mg·s−1·cm−2 and 5.50 μm·s−1, respectively. The performance improvement is attributed to the formation of a continuous HfO2 skeletal structure after the oxidation of an appropriate amount of HfCNWs. This continuous HfO2 skeleton significantly enhances the ability of the oxide layer to resist high-speed gas flow erosion and oxygen penetration. This study can provide support for the design of HfCNWs-reinforced C/C-HfC-SiC composites and promote their engineering application in the field of aerospace thermal protection. Composite number ; Pyrolysis ; Hydrothermal circulation ; Layer (electronics) ; Thermal stability ; Morphology (biology) ; Nanowire ; Polymer Advanced ceramic materials synthesis ; Semiconductor materials and devices ; Boron and Carbon Nanomaterials Research
Authors: Oliver Treske | Yaşar Krysiak | Hans Tornatzky | Markus R. Wagner | Sebastian Polarz
Source: Advanced Functional Materials (article, 2025-12-03)
Field: Materials Science — Materials Chemistry

A Programmable Semiconductor Containing Active Molecular Photoswitches Located in the Crystal's Volume Phase Abstract Exponential increases in information storage and computing demand associated with more energy consumption push the limits of micro‐ and nanoelectronics, necessitating radically new technologies. All‐optical synaptic and neuromorphic devices promise breakthroughs with their superior processing power and energy efficiency, but they require adaptive semiconductors. Unlike traditional materials (silicon, III/V, II/VI compounds), these semiconductors can reversibly alter their optical and optoelectronic properties in response to stimuli, supporting computing functions while holding memory values in either continuous or binary states. The study presents layered hybrid perovskites composed of organic layers with an active Coumarin species, which can be photochemically switched up to 70% and back. The [2+2] cycloaddition causes local distortions in the lead halogenide layers, modifying the band structure, and transforming the bandgap and photoluminescence based on the switching degree. The reaction facilitates high spatial precision in pattern creation, enabling the design of complex semiconductor and optical features within homogeneous films. Neuromorphic engineering ; Semiconductor ; Band gap ; Photoluminescence ; Homogeneous ; Photonics ; Phase (matter) ; Power consumption ; Quenching (fluorescence) Photochromic and Fluorescence Chemistry ; Organic and Molecular Conductors Research ; Perovskite Materials and Applications
Authors: Belkis Sulbarán-Rangel | Hasbleidy Palacios-Hinestroza | Anahí Arreaga Cancino | Edgar Mauricio Santos-Ventura | Orlando Hernández‐Cristóbal | Florentina Zurita
Source: Environments (article, 2025-10-01)
Field: Materials Science — Biomaterials

Preliminary Study of Cellulose and Polycaprolactone-Based Materials for Enhancing Bacteriological and Physicochemical Quality of Contaminated Water As water scarcity and pollution increase in rural communities in some parts of developing countries, there is a need to find simple ways to improve the quality of contaminated water. In this research, bagasse-based cellulose membranes were prepared and evaluated in a simple filtration system and compared with polycaprolactone membranes (PCL) and bagasse-based cellulose/PCL membranes for the removal of total coliform bacteria, Escherichia coli and other physical and chemical contaminants from contaminated water. Cellulose offers many opportunities in filtration technology due to its physical and chemical characteristics that allow its use in the design of membranes with flexible capabilities and specific applications. The membranes were characterized physically, chemically and mechanically, finding similarity in mechanical properties and differences in porosity. The membranes were tested in a filtration system and PCL membranes were more effective in removing turbidity (94.5%), color removal (70%) and phosphorus removal (50%), while cellulose membranes were better at retaining fecal coliforms (84.5%) and E. coli (90.8%). Statistical analysis (one-way ANOVA, p &lt; 0.05) confirmed significant differences among the three membrane types for turbidity, apparent color, and nitrate, while no significant differences were observed for pH, conductivity, and phosphorus. These results suggest that the use of the membranes could help to improve the quality of polluted water and more studies are needed in order to improve their efficiencies. Membrane ; Filtration (mathematics) ; Cellulose ; Turbidity ; Microfiltration ; Fecal coliform ; Contamination ; Membrane technology Advanced Cellulose Research Studies ; Microplastics and Plastic Pollution ; Membrane Separation Technologies
Authors: E. O. Echeweozo | C. D. Igwebike-Ossi | H. K. Idu | C. M. Megwa
Source: Journal of applied science and environmental management (article, 2025-12-10)
Field: Materials Science — Materials Chemistry

Radiation Shielding Performance of Polymethyl Methacrylate Polymer Reinforced with Bismuth Oxide and Yttrium Oxide for Medical Apron Design The need to replace the Lead (Pb) based aprons, which are heavy, uncomfortable, and poisonous to the body, has prompted the use of lighter lead-free alternatives. Consequently, the objective of this paper was to evaluate the use of Polymethyl methacrylate (PMMA) polymer reinforced with different percentages of Bismuth oxide and yttrium oxide (Bi2O3 and Y2O3) to achieve radiation protection in medical apron design using powder metallurgy method, SEM (Scanning Electron Microscopy) and EDS (Energy-Dispersive X-ray Spectroscopy). The radiation shielding properties of these samples were computed using PHITS and WinXCOM computer programs. Results showed that P-BY1 has the highest gamma shielding properties, with MAC values of 23.13 cm²/g at 0.015 MeV and 0.027 cm²/g at a 15 MeV photon energy. While P-B3 composite gave the highest neutron and charge particle shielding properties. Hence, the combination of P-BY1 and P-B3 polymer composite is highly recommended for the design of medical aprons and for shielding medical installations where flexibility is of higher consideration. Electromagnetic shielding ; Bismuth ; Oxide ; Dosimeter ; Polymethyl methacrylate ; Yttrium ; Composite number Radiation Shielding Materials Analysis ; Radiation Therapy and Dosimetry ; Polymer Nanocomposite Synthesis and Irradiation
Authors: C. Abinash Bhuyan | A. K. Chaudhary | Kishore K. Madapu | Prashant Kumar | Sandip Dhara
Source: ArXiv.org (preprint, 2025-12-15)
Field: Materials Science — Materials Chemistry

Enhanced THz emission and exciton transfer in monolayer MoS2/GaAs heterostructures For designing an efficient terahertz (THz) emitter, the defect density of the semiconductors is smartly increased to reduce carrier lifetime, which subsequently lowers the overall power output of the semiconductor. To overcome this fundamental trade-off, this study presents a novel approach, by integrating a direct band gap 2D semiconductor such as monolayer MoS2 (1L-MoS2) with a well-known THz emitter, low-temperature-grown gallium arsenide (GaAs). The fabricated hybrid 2D/3D vertical van der Waals heterostructure showed a 15% higher THz emission compared to bare GaAs due to phase-coherent addition of second-order non-linear susceptibility, and overall enhancement in the electric field of laser. The photoluminescence (PL) enhancement factor of 2.38 in heterostructures at GaAs emission energy of 1.42 eV. However, the substantial quenching of PL emission for 1L-MoS2 at the energy of 1.84 eV, is attributed to the Dexter-type exciton transfer mechanism at type-I band alignment. THz time-domain spectroscopy reveals a significant increase in optoelectronic properties, such as optical conductivity becoming doubled, and a 50% reduction in absorption coefficients. The study introduces a new route for fabricating large-area and compact mixed-dimensional van der Waals heterostructures, which can be used to enhance the efficiency of conventional semiconductor technologies and THz-based optoelectronic devices. Heterojunction ; Terahertz radiation ; Exciton ; Semiconductor ; Monolayer ; Gallium arsenide ; Photoluminescence ; van der Waals force 2D Materials and Applications ; Terahertz technology and applications ; Plasmonic and Surface Plasmon Research
Authors: Emiru Yidnekachew Melesse | Ali Yakoub Alkhair | Y. A. Filinskaya | I. A. Kirsh | O. A. Bannikova
Source: Proceedings of the Voronezh State University of Engineering Technologies (article, 2025-06-03)
Field: Materials Science — Polymers and Plastics

Effect of Zirconium oxide (ZrО2) Nanoparticles on the Mechanical, WVTR, and Antibacterial Properties of Polyethylene Polymer Matrix A nanocomposite based on a low-density polyethylene (LDPE) matrix reinforced with zirconium dioxide (ZrO₂) nanoparticles was synthesized via single-screw extrusion and systematically characterized. Structural analysis confirmed homogeneous dispersion of ZrO₂ nanoparticles at lower concentrations (4.7% w/w), while agglomeration occurred at higher loadings (8.7% w/w), as evidenced by digital microscopy. FTIR spectroscopy revealed Zr-O vibrational modes at 421-468 cm⁻¹, verifying successful incorporation. Mechanical properties exhibited concentration-dependent behavior: tensile strength decreased by 31% (12.30→8.5 MPa) and elongation by 34% (482→320%) with 8.7% ZrO₂, attributed to stress concentration at nanoparticle clusters. Conversely, film thickness increased linearly (R²=0.98) with filler content, reducing water vapor transmission rate by 42% through enhanced tortuosity. The nanocomposites demonstrated remarkable antimicrobial efficacy, achieving 3-log reduction against E. coli at 8.7% loading, surpassing conventional food packaging materials. Thermal analysis (DSC/TGA) revealed improved thermal stability (↑15°C in decomposition temperature) without compromising LDPE's melt processability. These findings position ZrO₂-LDPE nanocomposites as advanced materials for active packaging, combining tailored mechanical performance, superior moisture barriers, and non-migratory antimicrobial protection while maintaining compliance with food-contact regulations. Nanocomposite ; Polymer ; Nanoparticle ; Thermal stability ; Fourier transform infrared spectroscopy ; Polyethylene ; Ultimate tensile strength ; Zirconium dioxide ; Polyethylene glycol Polymer Nanocomposites and Properties ; Nanocomposite Films for Food Packaging ; biodegradable polymer synthesis and properties
Authors: Melek Fidan
Source: Bitlis Eren Üniversitesi Fen Bilimleri Dergisi (article, 2025-09-30)
Field: Materials Science — Ceramics and Composites

Comprehensive Analysis on The Structural Properties of BBiBa:V2O5 Glasses This study focuses on the structural characterization of 35B₂O₃ + (20-x)Bi₂O₃ + xBaO + 19ZnO + 25TeO₂ + 1V₂O₅ (x = 0, 5, 10, 15) (BBiBa) glass systems, along with a comprehensive discussion of the obtained findings. The melt quenching process was employed to fabricate the glass samples, and several characterisation methods, including FTIR, Raman spectroscopy, UV-vis spectroscopy, EPR, and XRD, were utilised to assess structural features. FTIR and Raman spectra revealed the existence of bismuth oxide, multiple borate, and telluride groups. Optical absorption spectra exhibited bands at 13736 cm-1 and 19881 cm-1, corresponding to the 2B2g→2E2g and 2B2g→2B1g transitions, respectively. As the BaO content increases, the optical band gaps gradually decrease due to the rise in non-bridging oxygen atoms, which significantly influence the electronic structure. The EPR spectra of VO2+ ions exhibited Spin-Hamiltonian parameters satisfying the relation g_∥ Raman spectroscopy ; Quenching (fluorescence) ; Characterization (materials science) ; Absorption spectroscopy ; Analytical Chemistry (journal) ; Absorption (acoustics) ; Spectral line ; Bismuth Glass properties and applications ; Radiation Shielding Materials Analysis ; Luminescence Properties of Advanced Materials
Authors: Álvaro V. Terán-Alcocer | Fernanda M. J. Cifuentes-Ajuchan | B. J. López-Mayorga | Bernardo A. Frontana‐Uribe
Source: Frontiers in Chemistry (article, 2025-09-04)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Formal synthesis of dibenzotetrathiafulvalene (DBTTF), through practical electrochemical preparation of benzo[d]-1,3-dithiole-2-one (BDTO) This study focuses on developing an electrochemical reaction to produce benzo[d]-1,3-dithiole-2-one (BDTO). This compound serves as a direct precursor for dibenzotetrathiafulvalenes (DBTTF), an important member of the charge transfer complex family. BDTO is synthesized in three steps (16%) starting from aniline. The key reaction is an anodically driven intramolecular cyclization (35%), involving a thiyl radical-cation intermediate formed from the oxidation of the S-aryl-O-ethyldithiocarbonate derivative. This derivative is obtained in good yields from its respective aromatic diazonium salt. This approach eliminates the need for advanced, costly intermediates and avoids long, complex synthetic routes previously used to produce BDTO, utilizing safer and cheaper reagents. This opens the door to generating DBTTF derivatives quickly. Electrochemistry ; Formal synthesis ; Chemistry ; Combinatorial chemistry ; Nanotechnology ; Materials science ; Stereochemistry ; Physical chemistry ; Electrode Organic and Molecular Conductors Research ; CO2 Reduction Techniques and Catalysts ; Oxidative Organic Chemistry Reactions
Authors: Haozhe Jin | Zhanjun Yu | Shuangqing Xu | Xiaofei Liu | Wei Chen | Chuan-Lan Wang | Zhengxiang Han | Xin Liu
Source: Asia-Pacific Journal of Chemical Engineering (article, 2025-12-15)
Field: Materials Science — Materials Chemistry

Humidity‐Corrected Thermodynamic Modeling of Ammonium Chloride Crystallization Temperature Mechanisms and Application ABSTRACT As refineries process increasingly inferior crude oils, ammonium salt corrosion has intensified. Accurate prediction of ammonium salt crystallization temperatures and their influencing factors is therefore crucial for safe and stable operations. In this paper, based on the thermodynamic principle, the correlation mechanism between relative humidity and entropy–enthalpy change was innovatively constructed. A thermodynamic calculation method of ammonium chloride crystallization temperature was proposed and applied to assess the corrosion risk in the overhead reflux system of an atmospheric tower in a refinery. The results show that the proposed model, incorporating dual corrections for humidity and pressure, has a better prediction accuracy than existing models. Higher chlorine and nitrogen contents both elevate the crystallization temperature, whereas sulfur content has a negligible effect. As the water injection rate increases, the crystallization temperature will decrease due to the humidity effect. The inhibition effect of crystallization temperature decreases sharply when it exceeds 20 t/h. The crystallization temperature decreases by approximately 1°C per 1% increase in relative humidity. Crystallization ; Relative humidity ; Ammonium chloride ; Chlorine ; Salt (chemistry) ; Humidity ; Nitrogen ; Corrosion Corrosion Behavior and Inhibition ; Industrial Gas Emission Control ; Calcium Carbonate Crystallization and Inhibition
Authors: Jensheer Shamsudeen Seenath | Hicham Jabraoui | Timo Stettner | Andrea Balducci | Alain Estève | David Pech | Dominic Rochefort
Source: ChemRxiv (preprint, 2025-06-16)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Pyrrolidinium-based protic ionic liquid electrolytes for high performance RuO2 micro-supercapacitors Advances in smart technologies and the Internet of Things (IoT) require compact and efficient energy storage devices. Among microscale systems, RuO2-based micro-supercapacitors (MSCs) can deliver high-power pulses, but the limited stability window of their aqueous electrolytes restricts their energy density. This study investigated the use of pyrrolidinium-based protic ionic liquids (PILs) with different alkyl chain lengths and anion types to achieve pseudocapacitive charge storage in RuO2 MSCs with an extended cell voltage of up to 1.5 V. Of the tested electrolytes, 1-propyl pyrrolidinium trifluoroacetate [Pyr3H]⁺[TFA]⁻ exhibited excellent energy density and cycling performance, and 1-methyl pyrrolidinium tetrafluoroborate [Pyr1H]⁺[BF4]⁻ demonstrated low equivalent series resistance and superior power retention. The experimental findings were consistent with Reactive Force Field (ReaxFF) molecular dynamics simulations which revealed proton exchange and ion diffusion mechanisms in both ionic liquids. Ionogel-based MSCs demonstrated long-term cycling stability, retaining performance over 5000 charge/discharge cycles. These results highlight the potential of using pyrrolidinium-based PILs in on-chip, solid-state MSCs to power microelectronics. Ionic liquid ; Supercapacitor ; Electrolyte ; Chemical engineering ; Materials science ; Inorganic chemistry ; Chemistry ; Electrochemistry ; Organic chemistry ; Electrode ; Engineering ; Physical chemistry ; Catalysis Supercapacitor Materials and Fabrication ; Catalytic Processes in Materials Science ; Advancements in Battery Materials
Authors: Antoine Baron | Corentin Scholaert | David Guérin | Yannick Coffinier | Fabien Alibart | Sébastien Pecqueur
Source: RSC Applied Polymers (article, 2025-10-29)
Field: Materials Science — Polymers and Plastics

Chemical control for the morphogenesis of conducting polymer dendrites in water Conducting polymer dendrite (CPD) morphogenesis is an electrochemical process that enables <i>in materio</i> evolving intelligence in wetware devices. During CPD morphogenesis, voltage transients drive the physical evolution of electrically conductive structures, thereby programming their filtering properties as nonlinear analog devices. Whether studied in an electrochemical experiment or in neuromorphic devices, the dependence of the electrical properties of the electrogenerated structures on the chemical composition of their growth environment is still unreported. In this study, we report the existing interconnection between the nature and concentration of the electrolytes, electroactive compounds and co-solvents and the electrical and electrochemical properties of CPDs in an aqueous electrolyte. CPDs exhibit various chemical sensitivities in water: their morphology is highly dependent on the nature of the chemical resources available in their environment. The selection of these resources therefore critically influences morphogenesis. In addition, the concentrations of the different electrochemical species have varying impacts on growth dynamics, modulating the balance between thermodynamic and kinetic control over polymer electrosynthesis. By correlating the dependencies of these evolving objects with the availability of the chemical resources in an aqueous environment, this study offers guidelines to tune the degree of evolution of electronic materials in water and highlights potential avenues for their application. Such evolving hardware is envisioned to exploit the chemical complexity of real-world environments as part of information processing technologies. Electrochemistry ; Dendrite (mathematics) ; Kinetic control ; Conductive polymer ; Aqueous solution ; Interconnection ; Chemical species ; Chemical process Conducting polymers and applications ; Dielectric materials and actuators ; Advanced Materials and Mechanics
Source: New Materials Compounds and Applications (article, 2025-12-04)
Field: Materials Science — Materials Chemistry

Synthesis and Spectroscopic Characterization of La(III), Eu(III) and Ni(II) Complexes with Enamine Ligands Derived from 4,4,4-Trifluoro-1-(2-Furyl)-1,3-Butanedione Enamine ; Characterization (materials science) ; Catalysis ; Yield (engineering) ; Ligand (biochemistry) Lanthanide and Transition Metal Complexes ; Radioactive element chemistry and processing ; Inorganic and Organometallic Chemistry
Authors: Pavel S. Kulyabin | Tianhuai Xu | Yogeshwar D. More | Harini Sampathkumar | Ketan Pancholi | O Le Page | Chloe Rennie | Lea Hämmerling | Kelly Mônica Marinho e Lima | Eli Zysman Colman | Jin‐Chong Tan | Amit Kumar
Source: ChemRxiv (preprint, 2025-04-23)
Field: Materials Science — Polymers and Plastics

Semi-renewable Polyamides Containing Disulfide Bonds: Syn-thesis, Degradation, Self-Healing, and Triboelectric Properties We report here the synthesis, degradation, and properties of polyamides containing disulfide bonds. The polyamides have been prepared using a two-step melt polycondensation process from 4,4'-dithiodibutyric acid and bio-derived Pri-amineTM. The degradation of these polymers has been investigated using a combination of tools, such as visible light pho-tocatalysis, UV-mediated degradation, and disulfide-thiol metathesis reactions. The chemical, physical, and mechanical properties of these polymers have also been studied. The disulfide-containing polymers exhibit elastomeric and self-healing properties while showing high thermal stability. Furthermore, the novel application of these unique tribopositive polymers as self-repairable triboelectric nanogenerators for energy harvesting has also been demonstrated. Triboelectric effect ; Disulfide bond ; Degradation (telecommunications) ; Polyamide ; Renewable energy ; Self-healing ; Materials science ; Polymer chemistry ; Chemistry ; Composite material ; Engineering ; Medicine ; Biochemistry ; Electrical engineering Synthesis and properties of polymers ; Conducting polymers and applications ; Polymer composites and self-healing