jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Ashish Soni | Sonu Gupta | S.K. Bose | Jitendra Kumar Katiyar
Source: Scientific Reports (article, 2025-11-24)
Field: Materials Science — Polymers and Plastics

Optimal material selection of biocomposites for structural applications: an integrated fuzzy CRITIC-COPRAS approach The material selection is a decisive factor in the development and workability of composites. The research proposed an integrated fuzzy CRiteria Importance Through Intercriteria Correlation (CRITIC) and Complex Proportional Assessment (COPRAS) for material selection of 3D printed biocomposites developed by using fruit waste-derived biofillers and biodegradable polymers. The objective was to develop a mathematical model for materials selection of biocomposites for structural applications such as floor tiles, pavements, building blocks, doors, etc. Also, the composites can be effectively implemented in places where the consideration for mechanical and tribological performance under ambient conditions such as sliding elements, automobiles bumpers and interiors, frames, etc. are of prime importance The novelty of the work can be highlighted from the development of novel biocomposites and mathematical model which can effectively deals with the material selection problems in conditions of vagueness and hesitancy in the decision makers. The work will save time and resources and reduce the cost of biocomposites. The work brings sustainability to the composites manufacturing industries. CThe RITIC approach has revealed that the impact strength is the most significant criterion, whereas sliding wear is the least significant factor for the composites. The approach has identified the reinforcement of 20 wt.% of banana peel powder with 80 wt.% of polylactic acid, i.e. alternative A4, as the most suitable material for structural applications, whereas alternative A6 is composed of 90 wt.% of PLA and 10 wt.% of hybrid biofillers of banana peel powder and orange peel powder (in equal proportions), is the least preferable alternative. The identified best composite has demonstrated an impact strength of 20,000 kJ/m<sup>2</sup> and a specific wear rate of 0.00066 mm<sup>3</sup>/N-m. Moreover, the composites have obtained an optimal hardness of 82.2 (shore D) and a good compressive strength of 68.81 MPa. The proposed integrated CRITIC-COPRAS approach has identified the ranking sequences of the alternatives as A4 > A7 > A8 > A1 > A2 > A5 > A3 > A6. The work has successfully developed a mathematical model to assist the materials selection process of eco-friendly composites and reduce the associated problems due to the mismanagement of plastics and agro-industrial wastes. Material selection ; Selection (genetic algorithm) ; Sustainability ; Fuzzy logic ; Work (physics) ; Material properties ; Composite number ; Raw material Natural Fiber Reinforced Composites ; Aluminum Alloys Composites Properties ; Additive Manufacturing and 3D Printing Technologies
Authors: Mounir Khelladi | A. Djelloul
Source: Opto-Electronics Review (article, 2025-09-08)
Field: Materials Science — Ceramics and Composites

Higher-order soliton pulse propagation in lutetium aluminium glasses-doped cerium Lu3Al5O12:Ce3+ This study investigates the propagation of higher-order solitons in lutetium aluminium garnet (Lu3Al5O12 or LuAG) doped with cerium (Ce3+), a material known for its unique nonlinear optical properties. Using the nonlinear Schrödinger equation (NSE), the authors analyse the soliton formation and stability within this medium, exploring both normal and anomalous dispersion regimes. Experimental observations confirm the first occurrence of higher-order optical solitons in Lu3Al5O12:Ce3+, highlighting the material potential for advanced photonic applications. The interplay between pulse duration, bandwidth, and material nonlinearities is examined to understand the dynamics governing soliton behaviour. The authors’ findings suggest that the exceptional optical characteristics of LuAG:Ce enable promising prospects for applications in optical communication, ultrafast lasers, and signal processing. The results emphasise the importance of ongoing research into soliton dynamics within this crystal, paving the way for innovative approaches in the development of next-generation photonic devices. Soliton ; Lutetium ; Ultrashort pulse ; Dispersion (optics) ; Cerium ; Pulse (music) ; Aluminium ; Photonics ; Nonlinear optics Glass properties and applications ; Solid State Laser Technologies ; Photorefractive and Nonlinear Optics
Authors: Pankaj Sopan Hasabe | Kishor V. Gaikwad | Venketa Satyanarayana Nandmuri | Akanksha G. Kolekar | Kalyanraman Lakshmi Narayanan | Samadhan P. Pawar
Source: Indian Journal of Pharmaceutical Education and Research (article, 2025-04-24)
Field: Chemistry — Spectroscopy

QbD-Enhanced HPLC Method Development for Vildagliptin and Metformin HCl Formulations Objectives: This research employs the Quality by Design strategy to design an optimized High-Performance Liquid Chromatography method aimed at analyzing vildagliptin and metformin hydrochloride in pharmaceutical dosage forms. Materials and Methods: The mobile phases A and B comprised a buffer-acetonitrile mixture in ratios of 950:50 v/v and 600:400 v/v, respectively. Chromatographic separation was achieved using an YMC Triart C-18 column, with Vildagliptin detection conducted at 210 nm via UV absorbance. Various independent parameters were selected for investigation and risk assessment was employed to evaluate their impact on the analytical responses. Results: QbD prioritizes product understanding, risk management and process control to enhance quality assurance and regulatory tractability. Analytical Quality by Design principles ensure robust and flexible methods throughout the product lifecycle. Conclusion: This study developed a robust HPLC method for Vildagliptin using a Quality by Design (QbD) approach. Key factors like mobile phase composition and buffer pH were optimized through multivariate analysis. The resulting method, validated for accuracy, precision and robustness, outperformed traditional methods and is suitable for routine pharmaceutical analysis. Vildagliptin ; Metformin ; Chromatography ; Chemistry ; High-performance liquid chromatography ; Pharmacology ; Medicine ; Endocrinology ; Diabetes mellitus Analytical Chemistry and Chromatography ; Analytical Methods in Pharmaceuticals
Authors: Kais Daoudi | Ganna Yehia | Rania Ziad | Soumya Columbus | Krithikadevi Ramachandran | Mounir Gaidi
Source: EPJ Web of Conferences (article, 2025-01-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Design strategies of highly efficient silver/gold bimetallic arrays for SERS sensing applications Surface Enhanced Raman Spectroscopy (SERS) offers great opportunities for the rapid and ultrasensitive detection of chemical or biological species. The success of SERS sensors primarily depends on the facile and efficient immobilization strategies of metal nanostructures on appropriate supports. Hybrid plasmonic nanostructures have attracted enormous attention due to synergetic localized surface plasmon resonance effects leading to superior SERS enhancement. Herein, we attempted to fabricate silver/gold bimetallic nanostructures using the electroless method. While the silver deposition time remained constant at 30 s, the gold immersion time varied from 10 to 50 s. The structural, optical, and morphological properties were studied using X-ray diffraction, UV-visible spectroscopy, and field emission scanning electron microscopy. The surface morphology of the bimetallic sensor showed that highly homogenous and wellorganized nanoparticles have been developed on the silicon surface. The optical properties have been well correlated to SERS activities of the sensor. SERS investigation has shown that the developed sensor demonstrated high efficiency and excellent reproducibility. The enhancement factor (EF) of 5 ×10 7 has also been estimated for the developed sensor. The current study emphasized the importance of bimetallic AgAu sensors as chemo-sensors for environmental remediation applications. Bimetallic strip ; Nanotechnology ; Materials science ; Computer science ; Metallurgy ; Metal Gold and Silver Nanoparticles Synthesis and Applications ; Advanced biosensing and bioanalysis techniques ; Advanced Nanomaterials in Catalysis
Authors: Gulati | Singh | Sharma | Shekhawat | Chowdary | Kumar Sharma
Source: Bulgarian Chemical Communications (article, 2025-04-15)
Field: Materials Science — Polymers and Plastics

Effect of various nano-particles and surface treatments on the mechanical properties of jute basalt fiber reinforced epoxy-based composites: a review Basalt fiber ; Basalt ; Fiber ; Surface (topology) Natural Fiber Reinforced Composites ; Scientific and Engineering Research Topics ; Synthesis of Tetrazole Derivatives
Authors: Shu-Han Liao | Xiaoyu Cheng | F.-L. Hsu | Cheng-Fu Yang | Tung-Lung Wu
Source: Photonics (article, 2025-06-20)
Field: Materials Science — Materials Chemistry

Effect of CaO Content on the Photoluminescence Excitation and Emission Properties of Bi2O3 and ZnO-Co-Doped Ca2+xGa4O8+x Phosphors The synthesis process employed solid-state reaction methods to produce phosphors with varying CaO contents, specifically at x values of 0, 0.2, 0.4, 0.6, 0.8, and 1.0. As the CaO content (represented by the x value) increases, the crystalline structure of Ca2+xGa4O8+x + 0.01 Bi2O3 + 0.07 ZnO compositions underwent notable transformations. X-ray diffraction was used to characterize these structural changes, and we found that CaGa2O4, CaO, Ga2O3, and Ca3Ga4O9 were clearly identified. The diffraction intensities of CaGa2O4 and CaO phases increased and those of Ga2O3 and Ca3Ga4O9 decreased with the x value. Our findings revealed that the photoluminescence excitation (PLE) spectra consistently peak around 340 nm across all samples, while the photoluminescence emission (PL) spectra exhibited slight variations within the range of 474–477 nm. Most notably, the intensity of both PLE and PL spectra demonstrated a non-linear relationship with CaO content, initially increasing with higher CaO concentration, reaching maximum intensity at x = 0.4, and subsequently decreasing as the x value continued to rise. This research provides valuable insights into the relationship between composition, crystal structure, and luminescent behavior in Ca2+xGa4O8+x phosphor systems, and the theoretical mechanisms underlying these observed trends were thoroughly discussed. Photoluminescence ; Phosphor ; Doping ; Analytical Chemistry (journal) ; Materials science ; Diffraction ; Luminescence ; Emission intensity ; Emission spectrum ; Photoluminescence excitation ; X-ray crystallography ; Powder diffraction ; Crystal structure ; Excitation ; Solid solution ; Spectral line ; Crystallography ; Chemistry ; Optics ; Optoelectronics ; Physics ; Metallurgy Luminescence Properties of Advanced Materials ; Ga2O3 and related materials ; Advanced Photocatalysis Techniques
Authors: A.S. Henriques | Mariana S. L. Lima | Gøran J. Nilsen | M. Gutmann | S. Wirth | W. H. Brito | Valentina Martelli
Source: Advanced Science (article, 2025-06-04)
Field: Materials Science — Materials Chemistry

Anomalous Glassy Thermal Conductivity in a Perovskite Bismuthate Induced by Structural Dynamic Instability Unraveling the underlying mechanisms at the origin of ultra-low thermal conductivity in pristine crystals is of central relevance to designing new functional materials. Here, a study of thermal conductivity κ(T) in an extended temperature range (1.5-400 K) is reported in the single-crystalline bismuthate perovskite BaBiO<sub>3</sub>. The measured κ(T) shows an anomalous glass-like behavior with a ≈ T<sup>2</sup> dependence at low temperatures and a plateau in a wide temperature range from about 20 to 260 K, surprisingly recovering the expected downturn for a crystal only for T > 300 K. The measured room temperature κ ≈ 1.6 W m<sup>-1</sup> K<sup>-1</sup> agrees with the calculated value, including three-phonon and isotope disorder scattering. However, the departure of the experimental from the calculated κ(T) for T < 300 K, at the onset of the plateau, indicates that an additional scattering mechanism comes into play at lower temperatures. It is proposed that a tunneling two-level system associated with the BiO<sub>6</sub> octahedra rotation offers an additional phonon scattering mechanism and may explain the observed κ(T) suppression. The findings may have significant implications for the pairing mechanism and unconventional superconductivity of doped-BaBiO<sub>3</sub> aside from suggesting it as a candidate building block for functional heterostructures. Condensed matter physics ; Perovskite (structure) ; Materials science ; Phonon ; Scattering ; Thermal conductivity ; Phonon scattering ; Atmospheric temperature range ; Superconductivity ; Instability ; Chemical physics ; Thermodynamics ; Chemistry ; Crystallography ; Physics ; Optics ; Composite material Advanced Thermoelectric Materials and Devices ; Thermal properties of materials ; Thermal Expansion and Ionic Conductivity
Authors: Huaping Zuo | Shengxuan Xia | Haiyu Meng
Source: ArXiv.org (preprint, 2025-05-06)
Field: Materials Science — Biomaterials

Janus bound states in the continuum in structurally symmetric photonic crystals We propose a sigma_z-symmetry-preserving approach to achieve Janus bound states in the continuum (Janus BICs) exhibiting asymmetric topological charges in the upward and downward radiation channels. While prior approaches typically involve explicit structural perturbations to break vertical symmetry, our design leverages a bilayer photonic crystal slab (PCS) system with independently tunable refractive indices, introducing an optical asymmetry without altering the geometric symmetry. In the optical symmetry case, the system supports symmetry-protected BICs at Gamma point with topological charge q = -1, and Friedrich-Wintgen BICs (FW-BICs) at off-Gamma point with q = +1. Upon introducing refractive index detuning, the polarization vortex splits into two circularly polarized states (C points) with half-integer topological charge (q = 1/2), shifting oppositely in momentum space for upward and downward radiation, while the symmetry-protected BICs remain unaffected. Janus BICs are established through the shift of upward-radiating C points shift towards the Gamma point, accumulating a total topological charge of q = -1, while the downward-radiating counterpart contributes q = +1, leading to a net topological charge reversal between the two radiation channels. This purely optical mechanism allows for the realization of Janus BICs without any structural deformation. Their asymmetric topological nature makes them ideally suited for applications in unidirectional light sources, chiral photonic interfaces, and topological photonic circuits, offering a promising platform for on-chip optical communication, sensing, and quantum information processing. Topological quantum number ; Photonics ; Topology (electrical circuits) ; Janus ; Photonic crystal ; Polarization (electrochemistry) ; Asymmetry ; T-symmetry Diatoms and Algae Research ; Photonic Crystals and Applications
Authors: Jan Żarłok | Małgorzata Kowalska | Jerzy Szakiel
Source: Sustainability (article, 2025-09-03)
Field: Materials Science — Biomaterials

The Use of Collagen Hydrolysate from Chromium Waste in the Optimization of Leather Retanning Leather tanning generates substantial amounts of solid waste and effluents, posing significant environmental challenges due to the presence of hazardous chromium compounds. The aim of this study was to develop and optimize a method for recycling chromium-tanned leather waste by utilizing it as a raw material in the retanning process. Collagen hydrolysate was extracted from chrome-tanned leather shavings through acid hydrolysis and subsequently incorporated, together with melamine, into novel retanning compositions. The experimental design, based on the Kleeman method, involved varying the hydrolysate content (25%, 30%, 35%) and melamine concentration (2.5%, 3.0%, 3.5%, 4.0%) to assess their impact on the physicochemical properties of retanned wet-blue leathers. An innovative aspect of the study was the integration of the Kateskór computer program, employing the Kleeman experimental planning method, to optimize the formulation of retanning compositions. This computational approach enabled the precise determination of hydrolysate and melamine quantities required to achieve leather properties that meet both producer and consumer expectations. The optimized formulation identified the hydrolysate content in the range of 28.78–29.63% and melamine in the range of 3.61–3.68% as optimal for obtaining leathers with the desired mechanical strength, shrinkage temperature, and water vapor permeability. The study presents a practical model of a circular economy within the leather industry, aligning with the European Green Deal Strategy by promoting resource efficiency and minimizing hazardous waste. The proposed methodology provides a viable pathway for sustainable leather production through waste valorization and process optimization. Hydrolysate ; Chromium ; Chemistry ; Pulp and paper industry ; Waste management ; Engineering ; Organic chemistry ; Hydrolysis Collagen: Extraction and Characterization ; Microplastics and Plastic Pollution ; Additive Manufacturing and 3D Printing Technologies
Authors: Hwichan Cho | Hyoin Kim | Meeree Kim | Mahnmin Choi | Hyunwoo Jo | Da In Kim | Byeongjae Kang | S.D. Roh | Hyunjung Kim | Ji‐Sang Park | Sohee Jeong | Moon Sung Kang
Source: Advanced Materials (article, 2025-11-17)
Field: Materials Science — Materials Chemistry

Silver Ions as Ambipolar Dopants in InAs Nanocrystal Solids The precise control of semiconductor polarity in nanocrystals (NCs) is crucial for optimizing device performance in various optoelectronic applications. In this study, it is shown that Ag⁺, added post-synthetically to InAs NCs using an AgNO<sub>3</sub> solution, can induce either n-type or p-type doping of the solid, depending on the intrinsic polarity of the host and the dopant concentration. In n-type InAs NCs, Ag⁺ consistently acts as an interstitial n-type dopant, shifting the conduction band minimum closer to the Fermi level. Conversely, in p-type InAs NCs (innately doped with Zn during synthesis), Ag⁺ initially exhibits a p-type doping effect at low concentrations by forming surface dipoles but transitions to an n-type doping effect at higher concentrations through interstitial incorporation. These results offer a unified understanding of the intricate and adjustable doping behavior of Ag⁺ in colloidal NC systems and present new opportunities for post-synthetic polarity engineering in III-V nanomaterials. Ambipolar diffusion ; Dopant ; Doping ; Nanocrystal ; Polarity (international relations) ; Dipole ; Ion Quantum Dots Synthesis And Properties ; Chalcogenide Semiconductor Thin Films ; Silicon Nanostructures and Photoluminescence
Authors: Qi, Weiyan
Source: SPIRE - Sciences Po Institutional REpository (article, 2025-09-18)
Field: Materials Science — Materials Chemistry

Structure et dynamique des états électroniques dans les matériaux quantiques stratifiés Layered materials possess uniqueband structures and physical properties thatdistinguish them from three-dimensionalmaterials, attracting widespread researchinterest over the past decades. These distinctivefeatures arise from the strong intralayer atomicbonding and relatively weak interlayerinteractions. Therefore, tuning the atom types,intralayer structures, the interlayer interactions,or even stacking different types of materialscan fundamentally change the macroscopicphysical properties of the system.This thesis focuses on the electronic structureproperties of two representative classes oflayered materials: transition metaldichalcogenides (TMDs) and two dimensionalperovskites. Using angle-resolvedphotoemission spectroscopy (ARPES) and itstime-resolved extension (tr-ARPES), incombination with electron diffraction, Ramanspectroscopy, and transient reflectivitymeasurements, we systematically investigatecomplex electronic many body effects, chiralsuperlattice switching, and electron phononcoupling phenomena in these materials Electronic structure ; Superlattice ; Electronic band structure ; Raman spectroscopy ; Stacking ; Coupling (piping) ; Transition metal ; Atom (system on chip) ; Phonon Chemical and Physical Properties of Materials ; Surface Chemistry and Catalysis ; Topological Materials and Phenomena
Authors: Abdelmoutalib Benfrid | Mohammed Chatbi | Zouaoui R. Harrat | Mohamed Bachir Bouiadjra
Source: Periodica Polytechnica Civil Engineering (article, 2025-07-14)
Field: Materials Science — Materials Chemistry

Selective Integration of Waste-Derived Glass Nanopowders in Structural Wall Concrete: Improving Thermal Efficiency and Elasto-Mechanical Properties for Sustainable Construction Concrete, as a primary construction material, faces significant environmental and performance challenges, including high carbon emissions and limited thermal comfort, particularly in structural applications. This study investigates the integration of waste-derived glass nanopowder (GNP) as a sustainable additive to enhance the thermal and mechanical performance of eco-concrete. The research aims to optimize thermal comfort and structural efficiency for wall applications while promoting environmental sustainability. Using analytical homogenization models, the elasto-thermo-mechanical behavior of nano-reinforced concrete (RC) is evaluated. The Maxwell–Eucken model is employed to assess thermal conductivity, while the Luo model determines the elastic properties, accounting for the three-dimensional behavior of wall structures. The results indicate that incorporating a 30% volume fraction of GNP enhances thermal conductivity by nearly 15%, increases thermal resistance by 25%, and significantly reduces thermal expansion and the thermal transmittance coefficient (Uhom) by 30% and 25%, respectively. Additionally, the elastic properties are shown to adjust proportionally to the nanopowder content, ensuring compatibility with structural demands. These findings underline the potential of GNP as an efficient and sustainable additive for advanced structural applications, particularly in energy-efficient wall systems, contributing to the advancement of eco-friendly civil engineering practices. Materials science ; Thermal ; Composite material ; Structural engineering ; Waste management ; Engineering Structural mechanics and materials ; Advanced Energy Technologies and Civil Engineering Innovations ; Recycling and utilization of industrial and municipal waste in materials production