jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Yingying Niu | Nianlong Ding | Meng Chen | Qing Xu | Xiangjie Qi | Xueying Liu
Source: Scientific Reports (article, 2025-12-21)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Ultrabroadband hybridized-resonance terahertz metamaterial absorber in a multilayer composite architecture To address the challenge of extending terahertz absorbers toward the low-frequency end without sacrificing broadband efficiency or polarization/angle insensitivity, we introduce a hybridized-resonance architecture that couples in-plane resonances, longitudinal Fabry-Pérot (FP) cavity modes, and inter-cell air-gap waveguide modes.This coupling pushes the lower band edge to 0.20 THz while preserving high absorptance and incident-angle robustness, a capability valuable for applications spanning 0.1-2 THz. By exploiting controlled modal coupling, the structure promotes broadband impedance matching and controlled dissipation, thereby mitigating sensitivity to polarization and incidence. Full-wave simulations predict an average absorptance of 95% across 0.20-2.54 THz, a peak absorptance ≈ 100%, and a fractional bandwidth of ≈ 328% (normalized to the geometric center frequency), corresponding to a bandwidth ratio of 12.7:1 (i.e., 1270%). High absorptance is retained for linear polarization angles from 0° to 90° and for incidence angles up to 30°, making the device attractive for terahertz sensing and electromagnetic countermeasure applications and providing a practical blueprint for future absorber designs. Absorptance ; Terahertz radiation ; Broadband ; Bandwidth (computing) ; Metamaterial ; Polarization (electrochemistry) ; Impedance matching ; Wideband Metamaterials and Metasurfaces Applications ; Advanced Antenna and Metasurface Technologies ; Plasmonic and Surface Plasmon Research
Authors: Changjo Kim | Irem Kozakci | Junsu Kim | Jihyung Lee | Wu Ying | S. Jeong | Byeongsu Kim | Jung‐Yong Lee
Source: Advanced Optical Materials (article, 2025-12-27)
Field: Materials Science — Materials Chemistry

Dark Current Suppression and Field‐Assisted Charge Extraction in Colloidal Quantum Dot Near‐Infrared Photodetectors Using Vertically Phase‐Separated Polymer Layers Abstract Lead sulfide (PbS) colloidal quantum dots (CQDs) have emerged as promising materials for near‐infrared (NIR) and short wavelength infrared photodetection, owing to their cost‐effectiveness in production, and broadband absorption extending up to 1550 nm. This spectral range provides significant advantages for applications such as autonomous driving. However, the performance of PbS CQD‐based devices has been limited by their high leakage currents, especially under reverse bias, which limits detectivity and operational bandwidth. In this work, an innovative device architecture is proposed to substantially reduce dark current densities over a wide reverse bias voltage range. This approach integrates a multi‐barrier structure with interlayered polymer charge‐blocking layers within the CQD film, effectively suppressing leakage current and preventing breakdown under reverse bias. The CQD/polymer hybrid devices exhibit dark current densities as low as 2 × 10 −5 mA cm −2 under applied bias up to 5 V, and detectivity exceeding 6 × 10 12 Jones is consistently achieved between 3.5 and 6 V. This architecture also enables efficient field‐assisted charge extraction, leading to enhanced bandwidth reaching 660 kHz, far surpassing conventional CQD‐only devices. These results demonstrate a viable strategy to overcome the long‐standing trade‐off between detectivity and speed in NIR CQD photodetectors. Lead sulfide ; Dark current ; Photodetector ; Quantum dot ; Leakage (economics) ; Biasing ; Broadband ; Specific detectivity Quantum Dots Synthesis And Properties ; Carbon and Quantum Dots Applications ; Perovskite Materials and Applications
Authors: MD Rofiul Islam Rofi
Source: Preprints.org (preprint, 2025-02-06)
Field: Materials Science — Polymers and Plastics

Study on the Physical Properties of the Melange Yarn Mélange yarn, produced by blending fibers of different colors before spinning, is widely used in the textile industry for its unique aesthetic and functional advantages. This study investigates the physical properties of mélange yarn, focusing on tensile strength, elongation, evenness, hairiness, and abrasion resistance. The influence of different spinning techniques, including ring and compact spinning, on these properties is thoroughly examined. Additionally, the impact of fiber composition, particularly cotton-polyester and wool-acrylic blends, on yarn performance is analyzed. Through standardized testing methods, including universal tensile testing, Uster evenness measurement, and Martindale abrasion testing, the mechanical and surface characteristics of mélange yarn are assessed. The findings indicate that compact-spun mélange yarn exhibits superior strength, lower hairiness, and better evenness compared to ring-spun mélange yarn. Moreover, the study highlights the role of synthetic fibers in enhancing abrasion resistance, making mélange yarn more durable for high-performance applications. These insights provide valuable guidance for optimizing mélange yarn production, ensuring better quality and performance in various textile applications. Future research should explore sustainable fiber alternatives and advanced spinning modifications to further enhance mélange yarn properties. Yarn ; Materials science ; Composite material Textile materials and evaluations
Authors: Elya Mufidah | Audrya Nasywa Veliska | Adib Maula Mifzal | Farida Rahayu | Maghfira Selia Irawati | Yusuf Wibisono | Sri Suhartini | Maharani Pertiwi Koentjoro
Source: Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis (article, 2025-10-31)
Field: Materials Science — Biomaterials

L(+)-Lactic Acid Production from Corncob Biomass using Multiple Parallel Fermentation (MPF) with Aspergillus spp. and Lactococcus lactis Corncob is an abundant lignocellulosic residue whose conversion to high-value chemicals remains challenging. Here, we report the first Multiple Parallel Fermentation (MPF) that couples Aspergillus niger ATCC 16888, Aspergillus flavus ATCC 26946 and Lactococcus lactis ATCC 19435 in one pot for L-(+)- lactic acid production. The fungi supplied complementary cellulase- and xylanase-rich enzyme suites, while LAB rapidly fermented the released sugars. Enzyme activities, consortium compatibility and fermentation conditions were systematically optimized through Taguchi design (temperature 35-39 C, pH 6.0-7.0, substrate 3-7%). The optimum setting-39 C, pH 6.0, 7% corncob-yielded 1.783% w/v optically pure L-lactate in 48 h, outperforming earlier corncob processes by 19-55%. ANOVA assigned ~81% of the variance to temperature, confirming its dominant role, whereas substrate concentration and pH accounted for 14% and 4%, respectively. This is the first dual-fungus MPF on corncob. The dual-fungus strategy thus maintains a steady monosaccharide pool that sustains rapid LAB metabolism. Single-step MPF shortens processing time, avoids chemical hydrolysis and valorizes agricultural waste, offering a scalable route to food-grade L-lactic acid and PLA precursors within a circular-bioeconomy framework. Corncob ; Fermentation ; Lactococcus lactis ; Aspergillus niger ; Aspergillus flavus ; Lactic acid ; Hydrolysis ; Lignocellulosic biomass biodegradable polymer synthesis and properties ; Biofuel production and bioconversion ; Microbial Metabolic Engineering and Bioproduction
Authors: Eléonore Tacke | Philippe Durand | Arnaud Chevalier
Source: Journal of Materials Chemistry B (article, 2025-01-01)
Field: Chemistry — Organic Chemistry

Synthesis of π-extended CinNapht fluorophores <i>via</i> late-stage Pd-catalyzed C–N and C–C bond formation and application for selective imaging of lipid droplets in living cells We report the efficient synthesis of a 4'-brominated CinNapht scaffold, enabling late-stage functionalization <i>via</i> palladium-catalyzed cross-coupling reactions. This strategy granted access to 17 novel derivatives, including the first <i>N</i>-acetyl, <i>N</i>-carbamoyl, and <i>N</i>-aryl analogues, as well as entirely new C-C bonded structures <i>via</i> Suzuki-Miyaura, Heck, and Sonogashira couplings. These unprecedented modifications expand the π-conjugated system and tune the emission properties. Two of these fluorophores were successfully applied as selective probes for lipid droplet imaging in live cells, demonstrating the potential of this approach for biological sensing. Sonogashira coupling ; Surface modification ; Biological imaging ; Fluorophore ; Fluorescence ; Live cell imaging Supramolecular Chemistry and Complexes ; Mass Spectrometry Techniques and Applications ; Microtubule and mitosis dynamics
Authors: Kiran Prakash Surywanshi | Shivraj Jadhav | Khemchand R. Surana | Parag A. Pathade | Sunil K. Mahajan
Source: Biosciences Biotechnology Research Asia (article, 2025-09-30)
Field: Chemistry — Analytical Chemistry

Development and Validation of a Robust RP-HPLC Method for the Estimation of Remogliflozin Etabonate in Bulk and Tablet Dosage Forms ABSTRACT: Remogliflozin etabonate, a selective inhibitor of SGLT2, is prescribed for managing type 2 diabetes mellitus. To support quality control and routine testing, a dependable and efficient analytical technique is essential. The present study consists of a rapid, precise, and straightforward Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) method development for quantifying remogliflozin etabonate. An Inertsil ODS-3V column (150*4.6 mm, 5 µm) was used for separation. Optimization of the mobile phase was done from methanol: water (70:30, v/v) to acetonitrile: water (75:25, v/v), flow rate of 1.0 mL/min, and samples were analysed at 230 nm using a UV detector. ICH Q2(R1) was followed for validation of the method to assess various parameters like linearity, accuracy, precision, robustness, LOD, and LOQ. The assay demonstrated excellent linearity over 10–50 µg/mL (R² = 0.999), with a retention time of 2.55 min. Precision results showed %RSD values below 2%, while recovery studies confirmed accuracy within 98–102%. The calculated LOD and LOQ were 0.22 µg/mL and 0.68 µg/mL, respectively. The validated technique proved to be simple and robust, with adequate specificity, and can be effectively applied for routine analysis of remogliflozin etabonate in bulk as well as pharmaceuticals. Linearity ; Dosage form ; Retention time ; Quality by Design ; Phase (matter) ; Accuracy and precision Analytical Methods in Pharmaceuticals ; Diabetes Treatment and Management ; Drug Solubulity and Delivery Systems
Authors: Xiaolin Nie | Chunfeng Wang | Xinye Lu | Guo-jun Lai | Zugang Li | Dengfeng Peng | Weidong Chen | Deliang Zhu | Caofeng Pan
Source: Advanced Functional Materials (article, 2025-12-19)
Field: Chemistry — Organic Chemistry

Circularly Polarized Mechanoluminescence for Force‐Insensitive Optical Information Decryption Abstract Stimuli‐responsive materials that exhibit circularly polarized luminescence (CPL) have attracted significant attention for applications in chiroptical sensing and information security. However, the development of CPL platforms remains limited owing to the challenges in chirality control, reliance on photoexcitation, and complexity of the decoding mechanisms. In this paper, a force‐insensitive chiroptical platform is presented, constructed by integrating a mechanoluminescent phosphor layer with a photonic crystal layer. The phosphor layer enables both photoluminescence (PL) and mechanoluminescence (ML) emissions, whereas the photonic crystal layer enables tunable photonic bandgaps, achieved by adjusting the cellulose nanocrystal‐to‐glucose ratio. This structural design enables modulated CPL with high dissymmetry factors ( g lum ), reaching −0.512 and −0.573 for g PL and g ML , respectively. Further, the system shows distinct solvent‐responsive circularly polarized mechanoluminescence (CPML) behavior. Moreover, its force‐insensitive response offers a robust and light‐free strategy for information decryption, significantly enhancing security while simplifying operation. These findings highlight the potential of the CPML platform for next‐generation chiroptical sensing and secure information technologies. Mechanoluminescence ; Photonics ; Phosphor ; Photonic crystal ; Luminescence ; Photoluminescence ; Layer (electronics) Synthesis and Properties of Aromatic Compounds ; Luminescence and Fluorescent Materials ; Supramolecular Chemistry and Complexes
Authors: Hao Wen | S. Wang | Yiyang Cai | Zhixin Zou | Zheng Qin | Tianyu Gao
Source: Nanomaterials (article, 2025-10-16)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Broadband Three-Mode Tunable Metamaterials Based on Graphene and Vanadium Oxide Terahertz waves have great potential for applications in security imaging, wireless communication, and other fields, but efficient and tunable terahertz-absorbing devices are the key to their technological development. In this paper, a tunable terahertz metamaterial based on graphene and vanadium dioxide materials is proposed. When the vanadium dioxide conductivity is 1.6 × 10<sup>5</sup> S/m and the Fermi energy level of graphene is 0.75 eV, the metamaterial exhibits high absorptivity exceeding 90% in ultra-broadband of 2.05-14.03 THz; when the Fermi energy level of graphene is adjusted to 0 eV, the high absorption wavelength range narrowed to 4.07-13.80 THz; when the vanadium dioxide conductivity is adjusted to 200 S/m, the metamaterial exhibits high transmissivity exceeding 80% in the wavelength range up to 15 THz. Additionally, the metamaterial is insensitive to polarization angles and incident angles, allowing it to adapt to changes in the angle of incidence and polarization in practical applications. The metamaterial has potential applications in optical switches, electromagnetic wave stealth devices, and filtering devices. Metamaterial ; Graphene ; Metamaterial absorber ; Terahertz radiation ; Fermi energy ; Wavelength ; Fermi level ; Broadband ; Cloaking Metamaterials and Metasurfaces Applications ; Advanced Antenna and Metasurface Technologies ; Antenna Design and Analysis
Authors: Feri Adriyanto | Mohd Zainizan Sahdan | Kuan-Wei Lee
Source: International Journal of Nanoelectronics and Materials (IJNeaM) (article, 2025-12-31)
Field: Materials Science — Materials Chemistry

Impact of Argon Flow Rate on Electrical and Optical Properties of Al-doped ZnO Thin Films with Insight into Ti/Al Ohmic Behaviors to n-ZnO This study explores the impact of Ar flow rate on the electrical and optical properties of Al-doped ZnO thin films and the performance of Ti/Al Ohmic contacts to n-ZnO films. Al-doped ZnO thin films were deposited on glass substrates using a tri-axis RF sputtering system under varying Ar flow rates (30–80 sccm). Electrical properties, including resistivity, carrier concentration, and mobility, were evaluated using Hall measurements, while optical transmittance was analyzed through UV-visible spectroscopy. The resistivity decreased with increasing Ar flow rate, achieving a minimum of 9.74×10−4 Ω⋅cm at 80 sccm, alongside improved mobility and carrier concentration due to enhanced film morphology and crystallinity. We have obtained that the optical transmittance values are between 75% and 80% and we know this as a blue shift phenomenon that occurs at the UV absorption edge due to the Burstein-Moss effect. It is seen that there is an almost ideal behavior in the Ti/Al Ohmic contact, with a specific contact resistivity as low as 1.8×10−5 Ω⋅cm2 in 15 nm Ti layers. We can conclude the importance of optimizing sputtering parameters on film properties for solar cell and optoelectronic device applications. Thus, we conclude that there is an interaction between deposition conditions and material performance to improve electrical conductivity and high transparency in Al-doped ZnO films. Ohmic contact ; Electrical resistivity and conductivity ; Thin film ; Transmittance ; Sputtering ; Volumetric flow rate ; Argon ; Resistive touchscreen ZnO doping and properties ; Thin-Film Transistor Technologies ; Chemical and Physical Properties of Materials
Authors: Zhi Sun | Mingtao Li | Nana Li | Wenge Yang
Source: Materials (article, 2025-04-03)
Field: Materials Science — Materials Chemistry

Double Domes of Mesoscopic Localized Anisotropic Lattice Strain in HCP–Ag75Al25 Under Uniaxial Compression The anisotropic strain development and releasing process in materials is largely related to their intrinsic mechanical properties and mesoscale grain interactions. Uniaxial compression can induce a large amount activation energy in a system, which builds up anisotropic elastic strain. This is especially common in a hexagonal close-packed (HCP) system. Utilizing the X-ray diffraction technique, we investigated the double-dome shaped evolution of its anomalous anisotropic strain when compressing a polycrystalline HCP-silver-aluminum (Ag<sub>75</sub>Al<sub>25</sub>) alloy up to 40 GPa. Analysis of the pressure-dependent grain size showed that the anisotropic strain relaxation was accompanied with grain-size refinement. This was a strong indication of microscopic structural anisotropy impacting both the mesoscopic mechanical properties and the macroscopic fracture behavior under uniaxial compression. Our findings provide valuable novel insights for further studies on materials with anisotropic mechanical properties. Materials science ; Anisotropy ; Mesoscopic physics ; Crystallite ; Condensed matter physics ; Composite material ; Isotropy ; Metallurgy ; Optics Microstructure and mechanical properties ; Boron and Carbon Nanomaterials Research ; Quasicrystal Structures and Properties
Authors: Hwandong Jang | Sienoh Park | Won‐Jae Joo | Jinbo Kim | Norihisa Kobayashi | Eunkyoung Kim
Source: Advanced Functional Materials (article, 2025-09-18)
Field: Materials Science — Polymers and Plastics

Synchronized Electro‐Chromo‐Emissive Devices Using a Mixed Ionic‐Electronic Conductive Layer for XR Applications Abstract A single‐cell‐type electro‐chromo‐emissive (ECECL) device engineered for extended reality (XR) applications, integrating electrochromic (EC) and electrochemiluminescent (ECL) functions via DC‐driven operation in a fully film‐state architecture is reported. A mixed ionic–electronic conductor layer is introduced atop a nanostructured EC polymer, significantly reducing ionic and electronic resistance and enabling ultrafast EC response. A transparent poly(vinylidene fluoride‐co‐hexafluoropropylene) film containing 1‐butyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide serves as an electrolyte layer, bridging the EC and ECL electrodes in an all‐film configuration. The ECL layer employs a redox‐active luminophore, which not only facilitates light emission but also governs the charge balancing between electrodes. ECL emission is achieved during cathodic bias while the EC layer is in its colored state, enabling synchronized operation of both EC and ECL in a single‐cell system. The ECECL device exhibits a high optical modulation (ΔT = 78%), strong ECL luminance (54 cd m − 2 ), and rapid switching kinetics (τ col ⁰·⁹⁵ = 0.28 s; τ bl ⁰·⁹⁵ = 0.24 s). Voltage‐programmable modulation among transparent, colored, and emissive states allows for simultaneous visualization of real, virtual, and electroluminescent elements. These results establish the ECECL platform as a multifunctional XR system to see digital content in real‐time, supporting multi‐state visual logic and spectrum‐resolved information encoding. Electroluminescent display ; Electrochromism ; Electroluminescence ; Electrochromic devices ; Layer (electronics) ; Electrode ; Electrical conductor ; Luminance ; Ultrashort pulse Transition Metal Oxide Nanomaterials ; Analytical Chemistry and Sensors ; Gas Sensing Nanomaterials and Sensors
Authors: Shantanu Shukla | Laura Stingaciu | Christopher B. Stanley | Pratul Agarwal | M.J. Cuneo | Andreas Stadler | Dean Myles
Source: RWTH Publications (RWTH Aachen) (article, 2025-01-01)
Field: Materials Science — Materials Chemistry

Dynamical Signatures of Thermotoga maritima Maltose-Binding Proteins Affected by Ligand Binding Functional segregation among protein isoforms depends on the interplay of their overall structures and the molecular dynamics of these structures.Thermotoga maritima maltose-binding protein (tmMBP) isoforms show size-dependent differential binding of maltose and malto-oligomers while maintaining remarkable fold conservation.This differential behavior needs detailed characterization in native-like aqueous conditions to understand the effects of protein dynamics on ligand binding and recognition.Small-angle neutron scattering (SANS), neutron spin echo (NSE) spectroscopy, and dynamic light scattering (DLS) were used in conjunction with previously published computational molecular dynamics (MD) simulations to understand the dynamic behavior of tmMBPs experimentally.SANS provided information on the overall structure of the molecules, while NSE was used to determine the dynamics in the nanosecond time scale.Both tmMBP2 and tmMBP3 have a bidomain architecture linked with a flexible hinge, with the binding pocket sitting in the cleft between the two domains.tmMBP2 and tmMBP3 showed different solution dynamics, with the translational and rotational components dominating the dynamics of both systems, resulting in a clear differentiation of their diffusion pattern.A faster dynamics component was also observed and was attributed to segmental dynamics.Differences observed between the ligand-free (apo) and ligand-bound (holo) states of the two proteins are attributed to conformational entropy.Our results highlight the intricacies of how structure and dynamics can together shape binding to a repertoire of substrates in structurally similar proteins. Thermotoga maritima ; Ligand (biochemistry) ; Plasma protein binding ; Protein structure Enzyme Structure and Function ; Protein Structure and Dynamics ; Protein Interaction Studies and Fluorescence Analysis
Authors: Eslam Salaheldin Abdelhady | Andrey Molotnikov | Tom Vaneker | Ian Gibson | Mehrshad Mehrpouya
Source: Shape Memory and Superelasticity (article, 2025-09-25)
Field: Materials Science — Materials Chemistry

Effect of Cu Alloying on the Microstructural and Functional Evolution of NiTiCu Shape Memory Alloys Abstract NiTi-based shape memory alloys (SMAs) are gaining prominence as ternary alloying and advanced processing techniques offer improved control over microstructure and functional behavior. This study examines the effect of copper (Cu) alloying on the microstructural and thermoelastic properties of (NiTi) 100− x Cu x alloys with x = 0, 5, 8, 12, and 20 wt.%, synthesized via vacuum induction melting (VIM). Microstructural analysis showed that increasing Cu content significantly altered the phase composition, lowering the onset of martensitic transformation from 70 °C in the binary alloy to as low as − 60 °C. A clear correlation was observed between Cu concentration, secondary phase formation, and the balance of austenite and martensite. Cu induced both B19 and B19ʹ martensitic structures. However, excessive Cu content led to the formation of intermetallic compounds, grain boundary arrest, and partial suppression of the transformation. Hardness increased with Cu addition up to a certain point, then slightly declined due to increased martensite. The 20 wt.% Cu alloy showed the highest B19 content within a complex intermetallic matrix, while intermediate Cu levels produced a balanced B19/B19ʹ microstructure. These findings clarify the composition–microstructure–property relationships in NiTiCu SMAs and guide future design strategies for functional alloy systems. Intermetallic ; Shape-memory alloy ; Microstructure ; Alloy ; Austenite ; Ternary operation ; Grain boundary ; Martensite Shape Memory Alloy Transformations ; Titanium Alloys Microstructure and Properties ; Magnetic and transport properties of perovskites and related materials