jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Fernanda Nahás Pires Corrêa | Rebecca Jemima Pereira Araújo | Vanessa Niely Soares Campos | Maria do Socorro C. Silva | Elaine Sá Menezes Cutrim | Álex Rojas | Mayara Mondego Teixeira | Marco Aurélio Suller Garcia | Ana C. S. Alcântara
Source: Minerals (article, 2025-08-25)
Field: Materials Science — Materials Chemistry

Layered Double Hydroxides Modified with Carbon Quantum Dots as Promising Materials for Pharmaceutical Removal Pharmaceutical contaminants such as ibuprofen are increasingly detected in water sources due to widespread use and insufficient removal by conventional treatment processes. Given its persistence and adverse effects on human health and aquatic ecosystems, efficient removal technologies are needed. This study reports the synthesis of a Mg/Al-layered double hydroxide (LDH) hybridized with carbon quantum dots (CQDs) via in situ co-precipitation to enhance adsorptive performance. The hybrid (LDH-CQD) was characterized by FTIR, XRD, DSC, TGA-DTG, SEM-EDS, BET, and pH in the point of zero charge (pHPZC) analysis. Results indicated a marked increase in surface area (2.89 to 66.9 m2/g), a shift in surface charge behavior (pHpzc from 8.57 to 6.21), and improved porosity. Adsorption experiments using ibuprofen as a model contaminant revealed superior performance of the hybrid compared to pristine Mg/Al-LDH, with a maximum capacity of 22.13 mg·g−1 (% Removal = 88.53%) at 25 ppm, and in lower concentrations (5 and 10 ppm), the hybrid showed 100% removal. Kinetic modeling followed a pseudo-second-order mechanism, and the isotherm was the SIPS model (maximum adsorption capacity = 24.150 mg.g−1). These findings highlight the potential of LDH-CQD hybrid as efficient and tunable adsorbents for removing emerging pharmaceutical pollutants from aqueous media. Layered double hydroxides ; Carbon quantum dots ; Carbon fibers ; Quantum dot ; Nanotechnology ; Materials science ; Chemical engineering ; Chemistry ; Inorganic chemistry ; Composite number ; Hydroxide ; Composite material Covalent Organic Framework Applications ; Layered Double Hydroxides Synthesis and Applications ; Advanced Photocatalysis Techniques
Authors: Ruben Goldhahn | Ann-Joelle Minor | Liisa Rihko‐Struckmann | Siew‐Wan Ohl | Patricia Pfeiffer | Claus‐Dieter Ohl | Kai Sundmacher
Source: Recycling (article, 2025-01-03)
Field: Materials Science — Polymers and Plastics

Recycling of Bulk Polyamide 6 by Dissolution-Precipitation in CaCl2-EtOH-H2O Mixtures To address the problems of virgin plastic production from fossil resources and the growing amount of plastic waste, a rapid transition to a circular economy is being pursued. The separation of mixed plastics into pure fractions is of paramount importance for promoting recycling and preventing downcycling. In this study, experimental parameters were determined for the selective bulk dissolution of polyamide 6 (PA 6) filaments (1.75 mm diameter, 1 cm length) in CaCl2-EtOH-H2O mixtures (CEW) at 75 °C. These parameters included the energy supply mode, dissolution time, CEW composition and CEW:PA mass ratio. Compared with energy supply by microwaves, energy supply by ultrasound improved the yield of dissolved and recovered PA 6 after 5 h from 31% to 52%. In total, the yield of PA 6 after 3 h of bulk dissolution increased from 18% to 69% when the energy supply mode was changed from microwave to ultrasound and the H2O:EtOH molar ratio of CEW was increased from 0.40 to 1.33 while maintaining an optimal CEW:PA mass ratio of 8.5. Additionally, master plot analysis suggested that dissolution under microwave energy supply followed a contracting cylinder model, whereas dissolution under ultrasonic energy supply aligned with a 2D diffusion or third-order kinetic model. Microscopic observations suggested that, in the case of ultrasonic energy supply, oscillating bubbles on the particle surface enhanced the dissolution rate of PA 6 filaments in CEW. Dissolution ; Precipitation ; Polyamide ; Materials science ; Chemical engineering ; Mineralogy ; Chemistry ; Composite material ; Meteorology ; Engineering ; Geography Polymer Science and PVC ; biodegradable polymer synthesis and properties ; Recycling and Waste Management Techniques
Authors: Rofaida F. H. Darweesh | Remon M. Zaki | Aldoushy Mahdy | Abdelaal S. A. Ahmed
Source: Materials Advances (article, 2025-10-30)
Field: Chemistry — Inorganic Chemistry

Enhanced adsorption of methylene blue (MB) dye by the MoS <sub>2</sub> /ZIF-8 composite: isotherm and kinetics studies Facile synthesis of the MoS 2 /ZIF-8 adsorbent for cationic dyes from aqueous solution. Methylene blue ; Adsorption ; Cationic polymerization ; Aqueous solution ; Kinetics ; Sorption isotherm Metal-Organic Frameworks: Synthesis and Applications ; Adsorption and biosorption for pollutant removal ; Phosphorus and nutrient management
Authors: Songrui Hou | Fengjiao Pan | Xinping Shi | Frank Angeles | Geethal Amila Gamage | Haoran Sun | Benise A. Niyikiza | Zahra Ebrahim Nataj | Fariborz Kargar | Alexander A. Balandin | David G. Cahill | Chen Li | Zhifeng Ren | Richard B. Wilson
Source: Physical review. B./Physical review. B (preprint, 2025-06-05)
Field: Materials Science — Materials Chemistry

Strong temperature dependence of thermal conductivity in high-purity cubic boron arsenide Materials with high thermal conductivity $(\mathrm{\ensuremath{\Lambda}})$ are needed to conduct heat away from hot spots in high-power electronics and optoelectronic devices. Cubic boron arsenide (c-BAs) has a high thermal conductivity due to its special phonon dispersion relation. Previous experimental studies of c-BAs report a room-temperature thermal conductivity between 1000 and $1300\phantom{\rule{0.16em}{0ex}}\mathrm{W}\phantom{\rule{0.16em}{0ex}}{\mathrm{m}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$. We synthesized high-purity isotopically enriched c-BAs single crystals with room-temperature thermal conductivity of $\ensuremath{\approx}1500\phantom{\rule{0.16em}{0ex}}\mathrm{W}\phantom{\rule{0.16em}{0ex}}{\mathrm{m}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$. Using time-domain thermoreflectance, we measured thermal conductivity and found a $1/{T}^{2}$ temperature dependence between 300 and 600 K--slightly stronger than predictions from state-of-the-art theoretical models. Brillouin and Raman scattering revealed minimal changes in phonon frequencies over the same temperature range, suggesting that the observed $1/{T}^{2}$ dependence is not caused by temperature-dependent changes in phonon dispersion. To probe defect densities in the BAs crystals we studied, we conducted transient reflectivity microscopy (TRM) measurements of absorption at sub-band-gap photon energies. We observe a correlation between TRM signal intensity and thermal conductivity. Notably, samples with thermal conductivity near $1500\phantom{\rule{0.16em}{0ex}}\mathrm{W}\phantom{\rule{0.16em}{0ex}}{\mathrm{m}}^{\ensuremath{-}1}\phantom{\rule{0.16em}{0ex}}{\mathrm{K}}^{\ensuremath{-}1}$ still exhibited nonzero TRM signals, suggesting the presence of defects despite the high thermal conductivity. Thermal conductivity ; Materials science ; Boron ; Condensed matter physics ; Thermal ; Conductivity ; Gallium arsenide ; Thermodynamics ; Optoelectronics ; Composite material ; Chemistry ; Physics ; Nuclear physics ; Physical chemistry Boron and Carbon Nanomaterials Research ; Thermal properties of materials ; Diamond and Carbon-based Materials Research
Authors: Emile S. Greenhalgh | Sang Nguyen | E. Leif | Alfredo Bici | Alexander Bismarck | Derrick Wen Hui Fam | Mats Johansson | Göran Lindbergh | Jodie L. Lutkenhaus | Milo S. P. Shaffer | Natasha Shirshova | Madhavi Srinivasan | Johanna Xu | Dan Zenkert
Source: Advanced Energy Materials (article, 2025-08-11)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Characterization and Reporting Protocols for Structural Power Composites: A Perspective Abstract Structural power composites, multifunctional materials that can withstand mechanical loads while storing/delivering electrical energy, are gaining significant interest. However, a consequence of melding disparate structural and electrochemical technologies is that there are no common characterization and reporting protocols, undermining the advancement of this emerging field. This Perspective paper sets out the challenges and resulting issues in the literature and recommends best practices and requirements for future protocols for reporting multifunctional performance. A key recommendation is that a “universal coupon” should be developed to be used for both mechanical and electrochemical characterization of cells, and hence credibly declare multifunctional performance. Ultimately, such a universal coupon can simultaneously characterize both functions, so as to glean electrochemical–mechanical coupling phenomena. This article recommends reporting guidelines so as to avoid the current ambiguities associated with normalization and permit robust comparison across the literature. The aspiration is that the guidelines and framework outlined in this paper lay the groundwork for formal standard methods to be developed and agreed upon. Establishing robust characterization and clearer reporting permits researchers and industry to take an informed view of the literature and provides a better grounding for the adoption of this technology, underpinning future industrialization of these emerging materials. Characterization (materials science) ; Electrochemical energy storage ; Risk analysis (engineering) ; Perspective (graphical) ; Underpinning ; Field (mathematics) ; Nanotechnology ; Construction engineering ; Systems engineering ; Computer science ; Materials science ; Business ; Engineering ; Electrochemistry ; Civil engineering Supercapacitor Materials and Fabrication ; Advancements in Battery Materials ; Conducting polymers and applications
Authors: Xin Sun | Jiaxuan Wang | Yiwei Ouyang | Xiaoke Huang | Xiaonan Wang | Yiran Han | Yang Liu | Xiaozhou Gong
Source: Applied Composite Materials (article, 2025-12-15)
Field: Materials Science — Polymers and Plastics

Hygrothermal Aging Effects on Low-Velocity Impact Resistance of 3D Orthogonal Jute/Basalt Hybrid Woven Composites Composite number ; Scanning electron microscope ; Distilled water ; Moisture ; Absorption of water ; Fiber ; Molding (decorative) ; Natural fiber ; Absorption (acoustics) Natural Fiber Reinforced Composites ; Hygrothermal properties of building materials ; Bamboo properties and applications
Authors: Hanqi Wen | Lingxuan Kong | Xinlu Zhu | Yansong Miao | Xing Sheng | Xiaodong Chen | Yuxin Liu | Peng Chen
Source: The Innovation (article, 2025-01-06)
Field: Materials Science — Polymers and Plastics

Mutually reinforcing and transpiration-dependent propagation of H2O2 and variation potential in plants revealed by fiber organic electrochemical transistors Plants use hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and variation potential (VP) waves as well as chemical transport by transpiration-driven xylem flow to facilitate cell signaling, cell-to-cell communication, and adaptation to environmental stresses. The underlying mechanisms and complex interplay among H<sub>2</sub>O<sub>2</sub>, VP, and transpiration are not clearly understood because of the lack of bioengineering tools for continuous <i>in planta</i> monitoring of the dynamic biological processes. Here, we tackle the challenge by developing microfiber-shaped organic electrochemical transistors (fOECTs) that can be threaded into the plants. The sensorized microfiber revealed that both H<sub>2</sub>O<sub>2</sub> and VP waves propagate faster toward the leaves than toward the roots because of the directional long-distance transport of H<sub>2</sub>O<sub>2</sub> in the xylem. In addition, the revealed interplays among VP, H<sub>2</sub>O<sub>2</sub>, and xylem flow strongly suggest a transpiration- and intensity-dependent H<sub>2</sub>O<sub>2</sub>-VP mutual-reinforcing propagation mechanism. The microfiber electronics offer a versatile platform for the <i>in situ</i> study of dynamic physiological processes in plants with high temporospatial resolution. Transpiration ; Variation (astronomy) ; Transistor ; Fiber ; Electrochemistry ; Materials science ; Optoelectronics ; Nanotechnology ; Chemistry ; Composite material ; Botany ; Electrical engineering ; Engineering ; Physics ; Biology ; Electrode Conducting polymers and applications ; Photoreceptor and optogenetics research ; Electrochemical sensors and biosensors
Authors: Vipulkumar K. Patel | Fateme Gholamalian | Christos Kalyvas | Majid Ghassemi | Mahmoud Chizari
Source: Electronics (article, 2025-08-31)
Field: Materials Science — Materials Chemistry

Modelling Mass Transport in Anode-Supported Solid Oxide Fuel Cells Understanding and accurately modelling mass transport phenomena in anode-supported solid oxide fuel cells (SOFCs) is essential for improving efficiency and mitigating performance losses due to concentration polarization. This study presents a one-dimensional, isothermal, multi-component diffusion framework based on the Stefan–Maxwell (SM) formulation to evaluate hydrogen, water vapour, and nitrogen transport in two different porous ceramic support materials: calcia-stabilized zirconia (CSZ) and magnesia magnesium aluminate (MMA). Both SM binary and SM ternary models are implemented to capture species interactions under varying hydrogen concentrations and operating temperatures. The SM formulation enables direct calculation of concentration polarization as well as the spatial distribution of gas species across the anode support’s thickness. Simulations are conducted for two representative fuel mixtures—20% H2 (steam-rich, depleted fuel) and 50% H2 (steam-lean)—across a temperature range of 500–1000 °C and varying electrode thicknesses. They are validated against experimental data from the literature, and the influence of electrode thickness and fuel composition on polarization losses is systematically assessed. The results show that the ternary SM model provides superior accuracy in predicting overpotentials, especially under low-hydrogen conditions where multi-component interactions dominate. MMA consistently exhibits lower polarization losses than CSZ due to enhanced gas diffusivity. This work offers a validated, computationally efficient framework for evaluating mass transport limitations in porous anode supports and offers insights for optimizing electrode design and operational strategies, bridging the gap between simplified analytical models and full-scale multiphysics simulations. Anode ; Fuel cells ; Oxide ; Mass transport ; Materials science ; Solid oxide fuel cell ; Nuclear engineering ; Chemical engineering ; Engineering physics ; Chemistry ; Engineering ; Electrode ; Metallurgy ; Physical chemistry Advancements in Solid Oxide Fuel Cells ; Fuel Cells and Related Materials
Authors: Mikhail Podobrii | Elena Barulina | Aleksandr Barulin
Source: Nanomaterials (article, 2025-08-31)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Inverse Design of Multi-Wavelength Achromatic Metalens Integrated On-Chip with Planar Waveguide Waveguide-integrated metasurfaces offer a promising platform for ultracompact on-chip optical systems, enabling applications such as fluorescence sensing, holography, and near-eye displays. In particular, integrated achromatic metalenses that couple guided modes to free-space radiation are highly desirable for single-molecule fluorescence sensing, where high numerical aperture (NA), efficient light focusing, and consistent focal volume overlap across excitation and emission wavelengths are critical. However, designing integrated high-NA metalenses with multi-wavelength operation remains fundamentally challenging due to the wavelength-dependent propagation of guided modes. Here, we present an inverse design framework that simultaneously optimizes the geometries and positions of silicon nitride nanofins atop a slab waveguide to achieve diffraction-limited focusing at three wavelengths with unity NA. The resulting metalens outperforms conventional segmented designs in focusing efficiency and sidelobe suppression, particularly at wavelengths corresponding to the excitation and emission bands of the model fluorophore Alexa Fluor 647. Numerical analysis shows that the design yields a high molecule detection efficiency suitable for epi-fluorescence single-molecule sensing. This work highlights the potential of inverse-designed metalenses as a versatile on-chip platform for advanced applications in fluorescence spectroscopy, augmented reality, or optical trapping. Achromatic lens ; Planar ; Wavelength ; Inverse ; Waveguide ; Chip ; Optics ; Materials science ; Optoelectronics ; Physics ; Telecommunications ; Computer science ; Mathematics ; Computer graphics (images) Metamaterials and Metasurfaces Applications ; Advanced biosensing and bioanalysis techniques ; Advanced Antenna and Metasurface Technologies
Authors: Giulia Lo Gerfo Morganti | Roberto Rosati | Guillermo D. Brinatti Vazquez | Sebin Varghese | David Saleta Reig | Ermin Malić | N.F. van Hulst | Klaas‐Jan Tielrooij
Source: Nature Communications (article, 2025-06-04)
Field: Materials Science — Materials Chemistry

Transient ultrafast and negative diffusion of charge carriers in suspended MoSe2 from multilayer to monolayer Understanding the ultrafast transport properties of charge carriers in transition metal dichalcogenides is essential for advancing technologies based on these materials. Here, we study MoSe<sub>2</sub> crystals with thicknesses down to the monolayer, combining ultrafast spatiotemporal microscopy and quantitative microscopic modelling. Crucially, we obtain the intrinsic ultrafast transport dynamics by studying suspended crystals that do not suffer from detrimental substrate effects. In mono- and bilayer crystals, we identify four sequential transport regimes. The first two regimes involve high-energy non-thermalized and quasi-thermalized carriers that propagate rapidly with diffusivities up to 1000 cm<sup>2</sup>/s. After ~1.5 ps, a remarkable third regime occurs with apparent negative diffusion, finally followed by exciton propagation limited by trapping into defect states. Interestingly, for trilayer and thicker crystals, only the first and last regimes occur. This work underscores the role of traps and dielectric environment in electron transport, offering valuable insights for the development of (flexible) (opto)electronic applications. Monolayer ; Transient (computer programming) ; Ultrashort pulse ; Diffusion ; Charge (physics) ; Charge carrier ; Materials science ; Chemical physics ; Nanotechnology ; Optoelectronics ; Chemistry ; Computer science ; Physics ; Thermodynamics ; Optics 2D Materials and Applications ; MXene and MAX Phase Materials ; Perovskite Materials and Applications
Authors: Mahdieh Safyari | D. J. Horvath | Masoud Moshtaghi
Source: Welding in the World (article, 2025-06-04)
Field: Materials Science — Metals and Alloys

Enhancing hydrogen embrittlement resistance in steel pipelines through hybrid welding Abstract This study investigates the microstructure and hydrogen embrittlement behavior of weld metals produced by hybrid laser-arc welding (HLAW) and metal active gas (MAG). Cross-sectional SEM analysis revealed that the HLAW process resulted in a significantly higher fraction of acicular ferrite compared to the MAG, promoting a refined grain structure. Electron backscatter diffraction analysis confirmed a greater presence of high-angle grain boundaries (HAGBs) in the HLAW specimens. Slow strain rate tensile testing demonstrated that both welding methods exhibited hydrogen embrittlement in a hydrogen-rich environment, but fracture initiation sites differed. While the MAG specimens mostly fractured within the weld metal under hydrogen exposure, the HLAW specimens failed mostly at the base metal, inferring that the weld section in HLAW had superior resistance to hydrogen-assisted cracking compared to the base metal, whereas in MAG, the weld metal exhibited worsened resistance relative to the base metal. Fractographic analysis further confirmed a transition from ductile fracture in the air to intergranular brittle fracture in the MAG weld section and base metal when exposed to hydrogen. The findings suggest that HLAW provides better hydrogen resistance due to its refined microstructure and increased HAGB density, making it a promising welding technique for hydrogen-related applications. Materials science ; Hydrogen embrittlement ; Solid mechanics ; Metallurgy ; Welding ; Embrittlement ; Pipeline transport ; Composite material ; Corrosion ; Mechanical engineering ; Engineering Hydrogen embrittlement and corrosion behaviors in metals ; Welding Techniques and Residual Stresses ; Material Properties and Failure Mechanisms
Authors: Woo Hun Choi | Seong Won Lee | Su‐Hyun Gong
Source: Nanophotonics (article, 2025-03-19)
Field: Materials Science — Materials Chemistry

On‐chip manipulation of trion drift in suspended WS <sub>2</sub> monolayer at room temperature Excitons, which are bound states of electrons and holes, in transition metal dichalcogenides (TMDCs) have been studied as an information carrier for realizing new types of optoelectronic devices. However, the charge neutrality of excitons inhibits the electric control of their motion, as seen in conventional electronic devices, except when utilizing a heterostructure. Here, we investigated the drift motion of trions, quasiparticles composed of an exciton bound to an excess charge, at room temperature in a suspended WS<sub>2</sub> monolayer by applying a gate-tunable electric field. Using a simple bottom-gate device, we can tune the electric field intensity and exciton-to-trion conversion ratio by increasing the charge density in the monolayer. Consequently, we experimentally observed that locally excited trions drift toward the center of the suspended monolayer. To understand the underlying mechanisms, we numerically simulated the trion drift using the drift-diffusion equation, accounting for the contributions from both the electric field and strain. The results confirmed that the electric field plays the dominant role in the drift phenomena. Our work offers a useful platform for realizing trion-based optoelectronic devices that are capable of operating even at room temperature. Trion ; Exciton ; Electric field ; Heterojunction ; Monolayer ; Electron ; Quasiparticle ; Materials science ; Condensed matter physics ; Optoelectronics ; Charge carrier ; Excited state ; Physics ; Atomic physics ; Nanotechnology 2D Materials and Applications ; Perovskite Materials and Applications ; Plasmonic and Surface Plasmon Research