jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Ioana Caloian | Jocelyn Trapp | Bhalaji Yadav Kantepalle | Patrick Latimer | Timothy J. Lawton | Christina Tang
Source: Polymers (article, 2025-06-26)
Field: Materials Science — Biomaterials

Mechanical Properties of Dual-Layer Electrospun Fiber Mats Electrospinning with sequential layer deposition has been reported for various applications such as tissue scaffolds, shape memory materials, and separations. However, the effect of layering on the mechanical properties is not fully understood. In this work, layered structures of thermoplastic polyurethane (TPU) and nylon were selected as a model system to investigate the effect of sequential layer deposition on mechanical properties. Evidence of the layered structure was indicated by scanning electron microscopy (SEM) and Fourier Transform Infrared spectroscopy (FTIR) experiments. Layering TPU with nylon resulted in a 60-fold increase in the Young's modulus. The Young's modulus of the layered structure was reasonably predicted by the Voigt rule of mixtures. Furthermore, the Young's modulus changes without any statistically significant change in elongation at break compared to a single layer of nylon. Thus, the elongation at break was dictated by the stiffer material, despite being present at a lower volume fraction. Overall, electrospinning with sequential layer deposition electrospinning is an effective approach for tuning the mechanical properties and surface chemistry of electrospun materials independently, which may be of interest for applications in tissue engineering and separations. Materials science ; Electrospinning ; Composite material ; Fourier transform infrared spectroscopy ; Scanning electron microscope ; Modulus ; Nylon 6 ; Thermoplastic polyurethane ; Layer (electronics) ; Elongation ; Volume fraction ; Chemical engineering ; Polymer ; Ultimate tensile strength ; Elastomer Electrospun Nanofibers in Biomedical Applications ; Advanced Sensor and Energy Harvesting Materials ; Conducting polymers and applications
Authors: Margaret D. Olawale
Source: Bulletin of the Chemical Society of Ethiopia (article, 2025-11-27)
Field: Chemistry — Inorganic Chemistry

Synthesis, properties and solvent sorption study of [Cu(Ter)(Ina)]·H2O coordination polymer The coordination polymer [Cu(Ter)(Ina)]·H₂O was synthesized via a reflux method and characterized using elemental analysis, FT-IR spectroscopy, UV-visible spectrophotometry, and powder X-ray diffraction (PXRD). Spectroscopic studies confirmed coordination through the hydroxyl oxygen atoms of terephthalate and isonicotinate ligands, as well as the pyridine nitrogen of isonicotinic acid. Upon activation, lattice water was removed, creating accessible pores for sorption studies. Vapochromic properties were analyzed through interactions with various solvent vapors using mass balance techniques, PXRD, and FT-IR spectroscopy. Results showed selective adsorption, with high methanol uptake (2.64 moles per formula unit) and moderate acetone uptake, influenced by polarity and molecular size. PXRD and FT-IR data confirmed the structural integrity of the polymer during sorption, indicating a physical adsorption process. These findings suggest its potential as an effective adsorbent for selective solvent vapor removal, with applications in environmental remediation and vapor sensing. Furthermore, reusability tests demonstrated excellent regeneration capacity, maintaining performance even after five cycles. KEY WORDS: [Cu(Ter)(Ina)]·H2O, FT-IR, PXRD, Solvent vapor Bull. Chem. Soc. Ethiop. 2025, 39(12), 2389-2399 DOI: https://dx.doi.org/10.4314/bcse.v39i12.2 Sorption ; Solvent ; Powder diffraction ; Acetone ; Coordination polymer ; Adsorption ; Polymer ; Pyridine Metal-Organic Frameworks: Synthesis and Applications ; Covalent Organic Framework Applications ; Thermal and Kinetic Analysis
Authors: He Chen | Liangliang Xu | Pengyang Li | Zhong Chen | Jinhua Xiong | Zonglin Liu | Qian Yan | Haowen Zheng | Xu Zhao | Fuhua Xue | Huanxin Lian | Yunxiang Chen | Teng Fei | Ying Hu | Qingyu Peng | Xiaodong He
Source: Nano Research (article, 2025-07-02)
Field: Materials Science — Materials Chemistry

A self-sensing photoactuator based on temperature self-compensated MXene/graphite composite ink for objects recognition and biomimetic soft robotics Soft actuators endowed with self-sensing capability become highly sought after in recent years. Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene is expected to be used in the development of self-sensing actuators due to its outstanding physical and chemical properties. However, achieving precise deformation feedback of MXene-based actuators remains a challenge, as the resistance change of MXene is not only affected by deformation, but also by temperature, and the decoupling is difficult. Here, a composite ink with temperature self-compensation (0.00125% °C<sup>−1</sup> of temperature coefﬁcient of resistance) is fabricated by combining MXene and graphite with opposite temperature coefficients of resistance. The composite ink can be written on a variety of substrates, including glass, cellulose paper, and various polymers. Based on this, an ink-cellulose/polymer composite actuator with self-sensing function is actualized. The actuator can achieve accurate real-time deformation feedback by monitoring the resistance signal of ink-cellulose layer which shows a high linear sensitivity (gauge factor ~ 14.5, R<sup>2</sup> &gt; 0.99), thereby realizing the perception of touch behavior and distinguishing objects with different weights, softness, and roughness. Besides, a series of biomimetic devices and soft robot with programmable movements (rolling and self-sustained oscillating) are also demonstrated. The results offer new insights for the development of the self-sensing actuators. Soft robotics ; Composite number ; Materials science ; Graphite ; Robotics ; Nanotechnology ; Composite material ; Artificial intelligence ; Computer science ; Robot MXene and MAX Phase Materials ; Advanced Materials and Mechanics ; Micro and Nano Robotics
Authors: Olaniran K. Akeremale | Joy Aworetan | Olamide Aworetan
Source: American Journal of Physical Chemistry (article, 2025-06-30)
Field: Chemistry — Inorganic Chemistry

Design Techniques and Applications of Ionic Liquids Incorporated Metal Organic Frameworks (IL/MOFs) Metal-organic frameworks (MOFs) are an interesting class of materials consisting of central metal ions and organic binders. These are porous crystalline materials in which different organic groups are combined with metal that has been cemented into place to provide a rigid and porous geometry. Green Metal Organic Frameworks (GMOFs) are a novel class of porous materials with a number of distinctive properties, including uniform and tunable pore size, large surface areas, adaptable pore structure, high porosities, acceptable thermal and chemical stabilities, simple production, and structural diversity. In order to alter the physicochemical characteristics and gas affinities of MOFs, ionic liquids (ILs) have recently been inserted as cavity occupants into the pores of metal organic frameworks (MOFs). Recent research has demonstrated that IL/MOF composites outperform pristine MOFs in a variety of applications, including gas storage, membrane-based gas separation, adsorption, catalysis, and ionic conductivity. Ionic liquid-modified MOFs (IL/MOFs) composite materials benefit from the high stability and versatile physical and chemical properties of ILs while retaining the structural characteristics of MOFs. Scholars are particularly interested in them because of their vast potential for usage in the domains of isolation and investigation. In this review, we provide a comprehensive overview of the applications of IL/MOF composites and talk about the latest advancements in their synthesis. The benefits and drawbacks of employing IL/MOF composites in diverse applications were investigated in order to ascertain the future directions in this field. Metal-organic framework ; Ionic liquid ; Materials science ; Nanotechnology ; Chemical engineering ; Process engineering ; Chemistry ; Engineering ; Organic chemistry ; Adsorption Metal-Organic Frameworks: Synthesis and Applications ; Ionic liquids properties and applications ; Membrane Separation and Gas Transport
Authors: Nikita Nikandrov | Sofya Spasskaya | М. А. Тедеева | Alexander L. Kustov | Dmitry Tsymbarenko
Source: Molecules (article, 2025-10-27)
Field: Chemistry — Inorganic Chemistry

Robust Anionic Framework Based on Sodium–Cerium Terephthalate Synthesis of anionic metal-organic framework Na[Ce(BDC)<sub>2</sub>(DMF)<sub>2</sub>] based on cerium (III)-sodium terephthalate was performed. The crystal structure, studied by the Rietveld method, consists of anionic [Ce(BDC)<sub>2</sub>]<sup>-</sup> layers, connected by interlayer sodium cations in a 3D network. Variable-temperature PXRD, total X-ray scattering with pair distribution function analysis, and DFT calculations revealed framework structure stability upon DMF elimination and thermal treatment up to 300 °C. Modification with copper cations was performed using wetness impregnation with a Cu(NO<sub>3</sub>)<sub>2</sub> methanol solution to obtain a catalyst for carbon monoxide oxidation. Cu<sup>2+</sup>@Na[Ce(BDC)<sub>2</sub>(DMF)<sub>2</sub>] in situ decomposition leads to the catalytic activity of the resulting CuO/CeO<sub>2</sub> composite during CO gas oxidation by air. Carbon monoxide ; Catalysis ; Methanol ; Decomposition ; Cerium ; Copper ; Thermal decomposition ; Thermal stability Metal-Organic Frameworks: Synthesis and Applications ; Catalytic Processes in Materials Science ; Covalent Organic Framework Applications
Authors: Emanuele Alberto Slejko | Giovanni Carraro | Dario Cavallo | Roberto Spotorno | Marco Smerieri
Source: NANOCOM ... (article, 2025-01-01)
Field: Materials Science — Polymers and Plastics

ADVANCED PREPARATION AND CHARACTERIZATION OF PEDOT-BASED NONWOVEN MATERIALS FOR WEARABLE ELECTRONICS Poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT-PSS) nanofiber-based materials represent advanced solutions for application in wearable electronics due to their biocompatibility, lightweight, permeability and improved sensitivity related to their large surface area.Since PEDOT is a conductive polymer, the electrospinning process for manufacturing thin, flexible nonwovens made of homogeneous nanofibers is not well-studied yet.In this research, we have investigated the fabrication and characterization of electrospun conductive nanofibers composed of varying concentrations of PEDOT-PSS mixed with poly(ethylene oxide) (PEO).The electrospinning technique was employed to produce these conductive nonwovens, and their morphological properties were evaluated using scanning electron microscopy (SEM).To enhance the water resistance of nanofibers, a thermal treatment was applied to remove excess PEO.The resulting samples demonstrated significant improvements in water stability, whereas untreated samples dissolved in pure water almost immediately.Electrical characterization of conductive nonwovens was performed, revealing resistivity in several hundreds of Ohmm.To further investigate the electrical response and electrochemical behavior of the material when in contact with specific compounds, we conducted electric impedance spectroscopy (EIS) and cyclic voltammetry (CV).The EIS measurements provided insights into the impedance characteristics, while the CV analysis highlighted the occurrence of reversible faradaic reactions.Our findings suggest that the optimized PEDOT-PSS/PEO nanofibers exhibit promising electrical and electrochemical properties, making them suitable for applications in flexible electronics and wearable sensors.This study contributes to the understanding of the relationship between the fabrication process, structural morphology, and functional performance of electrospun conductive nonwovens with the potential to significantly impact the wearable technology field. PEDOT:PSS ; Characterization (materials science) ; Electronics ; Wearable technology ; Wearable computer ; Materials science ; Nanotechnology ; Computer science ; Engineering ; Electrical engineering ; Embedded system ; Layer (electronics) Textile materials and evaluations
Authors: Moussa Boujemaa | R L Peters | Jiabin Luan | Yingjuan Mok | Shauni Keller | Daniela A. Wilson
Source: International Journal of Molecular Sciences (article, 2025-06-30)
Field: Materials Science — Materials Chemistry

A Simple Vortex-Based Method for the Generation of High-Throughput Spherical Micro- and Nanohydrogels Hydrogel particles, renowned for their high water content and biocompatibility in drug delivery and tissue engineering, typically rely on complex, costly microfluidic systems to reach sub 5 µm dimensions. We present a vortex-based inverse-emulsion polymerization strategy in which UV crosslinking of polyethylene glycol diacrylate (PEGDA) dispersed in n-hexadecane and squalene yields tunable micro- and nanogels while delineating the parameters that govern particle size and uniformity. Systematic variation in surfactant concentration, vessel volume, continuous phase viscosity, vortex speed and duration, oil-to-polymer ratio, polymer molecular weight, and pulsed vortexing revealed that increases in surfactant level, vortex intensity/duration, vessel volume, and oil-to-polymer ratio each reduced mean diameter and PDI, whereas higher polymer molecular weight and continuous phase viscosity broadened the size distribution. We further investigated how these same parameters can be tuned to shift particle populations between nano- and microscale regimes. Under optimized conditions, microhydrogels achieved a coefficient of variation of 0.26 and a PDI of 0.07, with excellent reproducibility, and nanogels measured 161 nm (PDI = 0.05). This rapid, cost-effective method enables precise and scalable control over hydrogel dimensions using only standard laboratory equipment, without specialized training. Materials science ; Viscosity ; Polymer ; Microscale chemistry ; Chemical engineering ; Particle size ; Nanotechnology ; Surface-area-to-volume ratio ; Microfluidics ; Emulsion ; Composite material Pickering emulsions and particle stabilization ; Surfactants and Colloidal Systems ; Proteins in Food Systems
Authors: T. Ayisha Naziba | R. Kiruthika
Source: Archive of Food and Nutritional Science (article, 2025-11-22)
Field: Materials Science — Materials Chemistry

Nanotechnology in Modern Agriculture: A Mini Review Agriculture is challenged with demands for higher productivity, improved resource efficiency, and reduced environmental impact. Traditional agricultural inputs, including chemical fertilizers, pesticides, and water-intensive practices, are reaching their limits due to inefficient utilization. Nanotechnology, characterized by the manipulation of materials at the nanoscale level of 1 to 100 nm, has emerged as a promising strategy for transforming agriculture. Agricultural productivity can be enhanced through reactivity, targeted delivery, and real-time monitoring. This review provides an overview of the role of nanotechnology in agriculture, focusing on nano-fertilizers, nano-pesticides, nanosensors, seed nanopriming, and environmental remediation. Evidence from studies demonstrates substantial gains in nutrient-use efficiency, reductions in agrochemical dependency, improved stress tolerance, and enhanced crop yields. The paper also discusses environmental implications, toxicity issues, regulatory measures, and standardization needs. Nanotechnology plays a vital role in developing sustainable, high-efficiency agricultural systems, but its long-term success will depend on responsible innovation and comprehensive field validation. Agrochemical ; Productivity ; Applications of nanotechnology ; Agriculture ; Crop productivity ; Standardization Nanoparticles: synthesis and applications ; Polymer-Based Agricultural Enhancements ; Environmental remediation with nanomaterials
Authors: Kendrick Smith | Madeline A. Arbuckle | Alexander Kim | Chun‐Yi Tsai | John F. McIntosh | Deeptak Verma | Eunjae Shim | Alison R. H. Narayan
Source: ChemRxiv (preprint, 2025-06-25)
Field: Materials Science — Materials Chemistry

Profiling of Diverse Pyridoxal-5’-Phosphate Dependent Enzymes Reveals Promiscuous Aldolase Activity with (2-Azaaryl)methanamines The elaboration of amine substrates through C–C bond forming reactions is important in the synthesis of bioactive small mole-cules. Pyridoxal-5'-phosphate (PLP)-dependent enzymes have emerged as valuable biocatalysts for this class of reactions, due to their high stereoselectivity and ability to forge new C–C bonds on unprotected α-amino acid substrates. However, the use of abiological primary amines as pronucleophiles with enzymes such as threonine aldolase has been unexplored, moderating the utility of a biocatalytic approach in the synthesis of diverse 1,2-amino alcohols. In this report, we disclose the discovery and engineering of a PLP-dependent aldolase which accepts (2-azaaryl)methanamines in an aldol-type transformation. The 1,2-amino alcohol products generated, which contain representative heteroaromatic pharmacophores, are delivered with control over both the diastereoselectivity and enantioselectivity in the C–C bond forming event. Protein engineering provided variants with improved binding affinity for the abiological substrate and decreased affinity for the native α-amino acid, overcoming inhibition of the abiotic reaction by components of lysate, a major challenge in reaction discovery with PLP-dependent enzymes such as threonine aldolases. This work represents the first known example of C–C bond formation on non-amino acid sub-strates with threonine aldolase and provides a platform for further development of complexity building biocatalytic reactions with abiotic amine substrates. Aldolase A ; Pyridoxal 5-Phosphate ; Pyridoxal phosphate ; Enzyme ; Biochemistry ; Pyridoxal ; Chemistry ; Profiling (computer programming) ; Cofactor ; Computer science Enzyme Structure and Function ; Amino Acid Enzymes and Metabolism ; Biochemical and Molecular Research
Authors: Xujuan Huang | Shiming Zhang
Source: RSC Advances (article, 2025-01-01)
Field: Chemistry — Organic Chemistry

Mechanically driven stainless steel-initiated activation of S–H bonds to construct disulfides Disulfides are important scaffolds in biologically active molecules and pharmaceuticals; however, their traditional synthesis method relies on costly precious metals, toxic solvents, oxidants, and harsh reaction conditions. Herein, we report a mechanochemical strategy enabling solvent-, oxidant-, catalyst-, and auxiliary abrasive-free construction of disulfides <i>via</i> stainless steel-induced S-H activation. Stainless steel nanoparticles (SS NPs) generated during ball milling facilitated efficient oxidative coupling of thiols under ambient conditions, achieving 41-99.9% yields within 30-90 minutes. The mechanistic studies confirmed the synergistic radical-mediated pathway dominated by iron species, effectively suppressing over-oxidation. This green approach eliminated environmental burdens while offering broad substrate tolerance, advancing sustainable disulfide synthesis for pharmaceutical and material applications. Construct (python library) ; Chemistry ; Bond ; Polymer chemistry ; Business ; Computer science Sulfur-Based Synthesis Techniques ; Catalytic C–H Functionalization Methods ; Chemical Synthesis and Reactions
Authors: Sivalingam Valliappan Meenakshi | Anwar Nawaz | Raja Jagadeesh | Paul Andrew Merlin Angel | Elumalai Suganthi | K. Sivakumar
Source: Science, Engineering and Health Studies (article, 2025-12-31)
Field: Materials Science — Biomaterials

Extraction, characterization and wound healing property of chitosan extracted from Penaeus indicus shells on mouse fibroblast (L929) cell line The current study aimed to characterize the properties of chitosan, extracted from Penaeus indicus, on the mouse fibroblast cell line (L929) for wound healing purposes. Chitosan is well known for its wide variety of biological characteristics. Shrimp exoskeletons were obtained from a local fish market in Chengalpattu, Tamil Nadu. Chitosan was extracted through demineralization, deproteination, and deacetylation processes. It was characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. The characterized chitosan was processed into nanoparticles and evaluated for cytotoxicity on cell lines. The cell line was treated with concentrations ranging from 25 to 500 µg/mL for 4 h. The results demonstrated 99% cell viability across all concentrations. The study primarily focuses on evaluating the ability of chitosan to repair wounds. Mouse fibroblast cell lines were seeded on a microtitre plate at a density of 1×10⁵ cells per well. Results indicated that the chitosan-treated groups exhibited significantly greater wound closure, with 10% to 20% more growth compared to the control groups. These findings underscore the potential of chitosan derived from P. indicus shrimp waste as a valuable pharmaceutical compound. Such applications could significantly contribute to the nation’s socioeconomic development. Chitosan ; Fibroblast ; Shrimp ; Cell culture ; Wound healing ; Chitin ; Cytotoxicity ; Viability assay Nanocomposite Films for Food Packaging ; Aquatic life and conservation ; Seaweed-derived Bioactive Compounds