jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Manorama Tripathi | P. Surekha | Prasun Kumar Roy
Source: ChemistrySelect (article, 2024-09-01)
Field: Materials Science — Polymers and Plastics

Fabrication of Laminated Electrospun Fire˗Resistant Phosphorylated Poly(Vinylalcohol) Membrane for Enhanced Firefighter Safety Abstract The current study focuses on the creation of breathable and fire˗retardant fibrous membranes using phosphorylated poly(vinylalcohol) (PPVA) via the electrospinning method, with a specific interest in their application for structural firefighter clothing. Poly(vinylalcohol) (PVA) was phosphorylated to enhance its inherent flame resistance. Optimization of reaction conditions, including time and temperature, was conducted to achieve a solution suitable for electrospinning. The flame resistance of PPVA was confirmed through vertical flammability tests, with thermogravimetric analysis indicating a significant increase in carbonaceous char formation during PPVA decomposition compared to unmodified PVA. The limiting oxygen index also exhibited a notable increase from PVA to PPVA. Furthermore, the study established optimal operating conditions for producing uniform fibers, considering parameters such as polymer concentration, feed rate, tip to collector distance, and applied potential difference. The PPVA membrane demonstrated superior water vapor transmission rates compared to PVA, indicating enhanced breathability. The entire fabrication process utilized an environmentally friendly water‐based solvent. Additionally, a moisture‐cum‐thermal barrier layer (MCTB) was developed by laminating the PPVA fibrous membranes with microporous polytetrafluoroethylene and further with needle punch‐spunlaced OPAN fabric. Experimental assessments of the MCTB layer revealed satisfactory breathability and thermal performance, surpassing the standard requirements of 35 cal/cm 2 for structural firefighting configuration. Materials science ; Electrospinning ; Limiting oxygen index ; Composite material ; Flammability ; Thermogravimetric analysis ; Membrane ; Fire retardant ; Fabrication ; Thermal decomposition ; Char ; Chemical engineering ; Pyrolysis ; Polymer ; Chemistry ; Organic chemistry Flame retardant materials and properties ; Tribology and Wear Analysis ; Electrospun Nanofibers in Biomedical Applications
Authors: Bin Liu | Norhaiza Nordin | Jiyang Wang | Jingwei Wu | Xiuliang Liu
Source: Engineering (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Research Analysis on the Microscopic Properties and Damping Performance of Carbon Nanomaterial-Modified Cement Mortar The application of carbon nanomaterials, particularly graphene and carbon nanotubes, in cement-based composites is highly significant. These materials demonstrate the multifunctionality of carbon and offer extensive possibilities for technological advancements. This research analyzes how the integration of graphene into cement-based composites enhances damping and mechanical properties, thereby contributing to the safety and durability of structures. Research on carbon nanomaterials is ongoing and is expected to continue driving innovation across various industrial sectors, promoting the sustainable development of building materials. Cement ; Mortar ; Nanomaterials ; Materials science ; Composite material ; Carbon fibers ; Structural engineering ; Engineering ; Nanotechnology ; Composite number Carbon Nanotubes in Composites ; Concrete and Cement Materials Research ; Smart Materials for Construction
Authors: Hang Yin
Source: MATEC Web of Conferences (article, 2024-01-01)
Field: Chemistry — Inorganic Chemistry

Stimuli-response of MOFs in Drug Delivery Systems Metal-organic frameworks (MOFs) attracted much attention of researchers in biomedicine because of its diverse functions, tuneable pore sizes, and large surface area. MOFs act as a possible drug delivery system and have numerous advantages. It exhibits high loading of drug, biocompatibility, target delivery of drugs, cytotoxicity, and biodegradability. The sizes of MOFs can also be changed without changing its topology. It makes MOFs a appropriate drug delivery carrier in various situations. In recent years, MOFs have become a multifunctional drug carrier, and researchers have designed a variety of MOFs based drug delivery strategies. The significant efficacy of these strategies is also verified. Therefore, exploring MOFs in drug delivery systems is of vital importance. This work mainly discusses about the formulation of drug-delivery MOFs and different kinds of stimuli-response of MOFs. Along with them, the efficacy of the MOFs drug delivery system are also demonstrated experimentally. It is acknowledged that using MOFs to delivery drug is a new method of curing and have a better treatment than current. This work can do help to the further research on the stimuli-response of MOF drug delivery systems. Drug delivery ; Drug ; Medicine ; Pharmacology ; Nanotechnology ; Materials science Metal-Organic Frameworks: Synthesis and Applications ; Advanced Nanomaterials in Catalysis ; Advanced biosensing and bioanalysis techniques
Authors: José Adán Moreno-Torres | Aurore Lecharlier | Fabricio Espejel‐Ayala | Johan Hofkens | Eduard Fron | Maarten B. J. Roeffaers | Eduardo Coutiño‐González | R. Ramı́rez-Bon
Source: ACS Applied Nano Materials (article, 2024-05-13)
Field: Materials Science — Materials Chemistry

White-Light Emissive Silver-Exchanged Nanoporous NaP1 Zeolites Silver nanoclusters (Ag-NCs) encapsulated into zeolite scaffolds, a class of photostable luminescent nanomaterials, have aroused great interest due to their attractive photoluminescence (PL) properties and promising applications as alternative phosphors for light-emitting devices. However, current research predominantly features single-color emitters in luminescent Ag-exchanged zeolites. Herein, the synthesis and characterization of white-light emissive Ag-exchanged NaP1 zeolites obtained from natural clinoptilolite through hydrothermal processes are described. Samples were subjected to X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), steady-state PL spectroscopy, and fluorescence microscopy analysis. Optically and chemically pure NaP1 zeolites were obtained from nonconventional precursors and subsequently exchanged with Ag loadings (12.5, 25, 33, 50, and 66 wt %), resulting in luminescent samples after a thermal activation at 450 °C with quantum efficiencies of up to 6.2% and a broad emission band (full width at half-maximum = 31250 cm–1) when excited at 380 nm. The strategy to obtain white-light emissive materials presented in this study opens alternative avenues for the development of sustainable phosphors, decreasing the burden of nonrenewable resources. White light ; Nanoporous ; Materials science ; White (mutation) ; Optoelectronics ; Nanotechnology ; Chemistry Catalytic Processes in Materials Science ; Nanocluster Synthesis and Applications ; Nanomaterials for catalytic reactions
Authors: Celal Avcıoğlu | Peter Kraus | Suna Avcıoğlu | Julian T. Müller | Aleksander Gurlo | Maged F. Bekheet
Source: Advanced Energy and Sustainability Research (article, 2024-12-09)
Field: Materials Science — Materials Chemistry

Utilization of Novel (KNbO<sub>3</sub>)<sub>1−<i>x</i></sub>(Ba<sub>2</sub>FeNbO<sub>6</sub>)<sub><i>x</i></sub> (<i>x</i> = 0.1, 0.2, 0.3) Solid Solutions for Efficient Photo‐Assisted Fenton Degradation of Methylene Blue Dye Novel (KNbO 3 ) 1− x (Ba 2 FeNbO 6 ) x ( x = 0.1, 0.2, 0.3) solid solutions corresponding to K 0.82 Ba 0.18 Fe 0.09 Nb 0.91 O 3 , K 0.64 Ba 0.36 Fe 0.18 Nb 0.82 O 3 , and K 0.46 Ba 0.54 Fe 0.27 Nb 0.73 O 3 compounds have been synthesized via molten salt method. X‐ray diffraction confirms the formation of solid solutions, while transmission electron microscopy combined with energy‐dispersive spectroscopy results demonstrates a homogeneous distribution of elements. The obtained solid solutions crystallized in a cubic crystal structure, whereas the parent KNbO 3 possesses an orthorhombic structure. The wide bandgap semiconductor KNbO 3 transformed into a visible‐light‐active material, with its bandgap energy reduced from 3.56 eV to ≈2.4 eV. The substitution of K in KNbO 3 with Ba is responsible for structural modification from orthorhombic to cubic symmetry, whereas both structural modification and the substitution of Nb with Fe correlated with optical properties. The photocatalytic activities of all obtained solid solutions are improved compared with the parent KNbO 3 and Ba 2 FeNbO 6 compounds for photocatalytic degradation of methylene blue (MB) dye. Among the series of solid solutions, K 0.82 Ba 0.18 Fe 0.09 Nb 0.91 O 3 photocatalysts show the highest MB removal efficiency owing to its relatively higher surface area, suppressed charge carrier recombination, and more negative conduction band edge. Moreover, K 0.82 Ba 0.18 Fe 0.09 Nb 0.91 O 3 photocatalyst (0.1 g) combined with hydrogen peroxide (H 2 O 2 ) to form a novel photo‐Fenton system, achieving almost complete degradation of 100 mL of 10 mg L −1 MB dye in 30 min. Orthorhombic crystal system ; Solid solution ; Materials science ; Band gap ; Crystallography ; Crystal structure ; Photocatalysis ; Analytical Chemistry (journal) ; Chemistry ; Optoelectronics Ferroelectric and Piezoelectric Materials ; Multiferroics and related materials ; Microwave Dielectric Ceramics Synthesis
Authors: L. Rossi | Endre Horváth | Tianyi Wang | Claudio Grimaldi | Andrzej Sienkiewicz | Bence G. Márkus | Dávid Beke | L. Forró
Source: iScience (article, 2024-04-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Tuning the color of high-karat gold in Au-TiO2 nanoparticle composites all the way to black For centuries, artisans have harnessed gold nanoparticles to imbue their creations with the vibrant hues that captivate the eye through interactions with visible light. In modern times, these distinct optoelectronic characteristics have pivoted toward the forefront of innovative technologies, finding their niche in advanced applications from solar energy to medicine, overshadowing their artistic heritage. This investigation reimagines the utilitarian scope of gold by innovating the optical characteristics of gold-titania nanostructures. This allows for an expanded palette of colors that retain the value of the precious metal. We employ nanostructured TiO<sub>2</sub> in a high-pressure-high-temperature sintering technique that stabilizes Au nanoparticles, thwarting coalescence, and Oswald ripening. Further refinement is possible by engineering TiO<sub>2</sub> color centers through the introduction of oxygen vacancies and Ti<sup>3+</sup> ions, which aid in creating an opulent high-karat black-gold, but preserve the mechanical attributes essential to the integrity and function of the final product. Colloidal gold ; Palette (painting) ; Nanotechnology ; Materials science ; Structural coloration ; Scope (computer science) ; Nanoparticle ; Plasmon ; Nanostructure ; Hue ; Computer science ; Visual arts ; Architectural engineering ; Optoelectronics ; Art ; Artificial intelligence ; Engineering ; Photonic crystal Gold and Silver Nanoparticles Synthesis and Applications ; TiO2 Photocatalysis and Solar Cells ; Laser-Ablation Synthesis of Nanoparticles
Authors: Imteaz Rahaman | Hunter D. Ellis | Kathy Anderson | Michael A. Scarpulla | Kai Fu
Source: arXiv (Cornell University) (preprint, 2024-05-13)
Field: Materials Science — Ceramics and Composites

Growth of GeO2 on R-plane and C-plane Sapphires by MOCVD Rutile Germanium Dioxide (GeO2) has been recently theoretically identified as an ultrawide bandgap (UWBG) semiconductor with bandgap 4.68 eV similar to Ga2O3 but having bipolar dopability and ~2x higher electron mobility, Baliga figure of merit (BFOM) and thermal conductivity than Ga2O3. Bulk crystal growth is rapidly moving towards making large sized native substrates available. These outstanding material properties position GeO2 as a highly attractive UWBG semiconductor for various applications. However, the epitaxial growth in the most advantageous polymorph (rutile), ensuring controlled phase, pristine surface/interface quality, precise microstructure, and optimal functional properties, is still in its infancy. In this work, we explored growth of GeO2 by metal-organic chemical vapor deposition (MOCVD) on both C- and R-plane sapphire. Utilizing tetramethylgermane (TMGe) as a precursor, we have investigated the influences of different parameters on the film properties, including growth temperature, chamber pressure, TMGe flow rate, oxygen flow rate, shroud gas flow rate, and rotation speed. The total pressure emerged as a crucial parameter while growth attempts at low total pressure resulted in no films for a wide range of temperatures, precursor flow rate, argon flow rates, and susceptor rotation rate. A phase diagram, derived from our experimental findings, delineates the growth windows for GeO2 films on sapphire substrates. This study serves as a pioneering guide for the MOCVD growth of GeO2 films. Metalorganic vapour phase epitaxy ; Plane (geometry) ; Materials science ; Geometry ; Mathematics ; Nanotechnology ; Epitaxy Glass properties and applications ; Photonic Crystals and Applications ; Aerogels and thermal insulation
Authors: N. Balamurugapandian | K. Suganya | R. Hariharasuthan | T. Jayanalina | Veerla Swarnalatha | K. SenthilKannan | R. Manikandan
Source: ECS Journal of Solid State Science and Technology (article, 2024-08-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Synthesis, Studies of Shocked Pulse of 50 Scale on 100 Gy Irradiated Zinc Acetate Crystals for Photonic, NLO, Phase-Matching and Electronic Utilities The Zinc Acetate - ZA is grown in 16–17 days as colorless crystal by slow evaporation manner; in the present work, the shocked pulses of range of 50 scaling of ZA-100 Gy irradiated sample is represented after the pulsed reference of shock waves as ZA-100Gy-50S in physical reference, the single crystalline XRD data of ZA-100Gy-50S is having 15.108, 9.254, 4.7999 of a, b, c values in Å and beta as 99.12° with P2 1 /c as space group and monoclinic as the system; the UV-visible spectral cut-off wavelength for ZA-100Gy-50S is 224 nm; the band gap in eV as 5.53 from Tauc’s plot and is 5.5357 eV from UV-visible data. The Fluorescence wavelength gives the energy impact of 2.4047 eV. The NLO-SHG as 1.34 times than the standard KDP and the phase matching proviso of ZA-100Gy-50S is 93.8 mV The surface morphological impact of ZA-100Gy-50S crystal is with small cracks, no major flaws; the third-order NLO of ZA-100Gy-50S is of 13.92 × 10 –6 esu by Z-Scan; the frequency doubling circuit and frequency tripling circuit are analyzed for the ZA-100Gy-50S and are 2.28 times, 3.23 times the input. The (111) based displaying of the display action with Red-Green-Blue filled polygonal effect. Materials science ; Monoclinic crystal system ; Optics ; Irradiation ; Crystal (programming language) ; Wavelength ; Analytical Chemistry (journal) ; Phase (matter) ; Zinc ; Physics ; Optoelectronics ; Crystal structure ; Crystallography ; Chemistry ; Nuclear physics Nonlinear Optical Materials Research ; Luminescence and Fluorescent Materials ; Nonlinear Optical Materials Studies
Authors: Ana Lopez-Campistrous | Hillary M. Sweet | Ciaran Terry | Craig R. Garen | Yu Wan | Robert Burrell | Kyle Moxham | Matthew Nickel | Michael J. Serpe | Michael Joyce | D. Lorne Tyrrell | Todd McMullen
Source: npj Biosensing (article, 2024-12-05)
Field: Materials Science — Materials Chemistry

A quantitative, label-free visual interference colour assay platform for protein targeting and binding assays The vast array of immunoassay technologies used to assess protein interactions is costly or platform-specific. We present a label-free visual interference colour assay (VICA) that quantifies peptide and protein interactions by creating an iridescent surface allowing direct visualisation without spectrophotometric optics or microfluidics. A nanoporous aluminium oxide surface is tuned to match the refractive indices of the overlying protein layers to generate visual interference colours. To functionalise the surface, we created an affinity-capture system using a protein A-carboxyglutamic (GLA) construct that orients antibodies to enhance the signal. Using off-the-shelf antibodies, the platform can isolate analytes in buffer, whole blood, or serum. This surface generates a discernible colour change at concentrations as low as 50 femtomoles/mm2 and can monitor oligomer formation in sequential steps on the same slide. VICA provides comparable kinetic parameters to biolayer interferometry and traditional immunoassays while also allowing characterisation of proteins in large macromolecular complexes. Computational biology ; Interference (communication) ; Ligand binding assay ; Chemistry ; Computer science ; Biology ; Biochemistry ; Receptor Anodic Oxide Films and Nanostructures ; Advanced Biosensing Techniques and Applications ; Advanced biosensing and bioanalysis techniques
Authors: Ester Pamponet Ribeiro | Rejane da Silva | Maria Joseíta dos Santos Costa | Reginaldo Souza Santos | L.S. Cavalcante | Samuel S. Eduardo | Renato Altobelli Antunes | Francisco Barros
Source:  (preprint, 2024-09-22)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Enhanced supercapacitor properties of CuWO4 electrode deposited on Ni foam The future of energy storage systems requires high energy and power capabilities, particularly for electronics and electric vehicles. This study presents copper tungstate (CuWO4) nanocrystals synthesized via a coprecipitation method and post-heat-treated at 500 ºC for 2 hours. X-ray diffraction patterns and Rietveld refinement data showed that the CuWO4 nanocrystals are monophasic with a triclinic structure, featuring distorted octahedral [CuO6] and [WO6] clusters. Spectroscopic analyses, including micro-Raman and Fourier transform infrared, identified multiple vibrational modes, while X-ray photoelectron spectroscopy confirmed the presence of Cu 2p, W 4f, and O 1s electronic states. Optical bandgap measurements showed an energy value of 2.48 eV. Scanning electron microscopy indicated the formation of aggregated, quasi-spherical nanocrystals. The Ni-foam|CuWO4 electrode present a high specific capacitance of 954.6 Fg-1 at 0.3 Ag-1 at 1240.1 Fg-1 at 5 mVs-1 measure through by galvanostatic chargedischarge and cyclic voltammetry and retention close to 97% after 5,000 cycles. Finally, Nyquist plots were obtained, and a good capacity of mass transport can be retained well after 5,000 cycles with the typical behavior of intrinsic ohmic and charge transfer resistances. The Ragone plots were obtained, showcasing impressive parameters of power density and energy density, with maximum values of 809.9 WKg-1 and 96.66 WhKg-1, respectively. Supercapacitor ; Electrode ; Materials science ; Graphene foam ; Chemical engineering ; Business ; Nanotechnology ; Chemistry ; Electrochemistry ; Graphene ; Engineering Supercapacitor Materials and Fabrication ; Nanoporous metals and alloys ; Catalytic Processes in Materials Science
Authors: M. Hossein Khalilian | Gino A. DiLabio
Source: ChemRxiv (preprint, 2024-12-16)
Field: Materials Science — Materials Chemistry

Quantum Coulombic Interactions Mediate Free Radical Control in Radical SAM Viperin/RSAD2 There are thousands of radical S-adenosylmethionine (rSAM) enzymes capable of catalyzing over 80 distinct reactions, yet their use in biotechnological applications is limited, primarily due to a lack of understanding of how these enzymes control highly reactive radical intermediates. Here, we show that little-known quantum Coulombic interactions are, in part, responsible for free radical control in Viperin/RSAD2, one of the few radical SAM enzymes expressed in humans. Using molecular dynamics and high-level multi-state broken-symmetry quantum mechanical/molecular mechanics calculations, we elucidated the mechanistic details of the catalysis, identifying a key step characterized by the formation of an unprecedented metastable deprotonated ribose radical intermediate. This intermediate is thermodynamically stabilized by spin-charge exchange-correlation interactions—a quantum Coulombic effect. The magnitude of this stabilization is such that the radical displays acidity two to six pKa units lower than that of closed-shell ribose. Given the omnipresence of negative charges in biological systems, these interactions potentially represent a universal mechanism for stabilizing and controlling highly reactive radical intermediates across radical enzymes, opening new avenues for enzymatic engineering and biotechnological applications. Chemistry Diamond and Carbon-based Materials Research
Authors: Katharina Kruppa | Itzhak I. Maor | Anat Karlin | Frank Steinbach | Gennady E. Shter | Dorothea Stobitzer | Hilke Petersen | Bernd Breidenstein | Meirav Mann–Lahav | Gideon S. Grader | Armin Feldhoff
Source: Journal of the American Ceramic Society (article, 2024-10-23)
Field: Materials Science — Materials Chemistry

High‐performance thermoelectric calcium cobaltite nanoribbon ceramic via electrospinning and dual spark plasma texturing Abstract High‐performance polycrystalline calcium cobaltite ceramic was synthesized via electrospinning of nanoribbons, followed by dual‐process compaction using spark plasma sintering and edge‐free spark plasma texturing. The combination of nanoribbon electrospinning and this multistage sintering technique was employed for the first time and resulted in exceptionally well‐textured thermoelectric ceramics. The textured ceramic had excellent thermoelectric properties. At 1073 K, the ceramic exhibited an electrical conductivity of 268 S cm −1 , a Seebeck coefficient of 247 µV K −1 and a heat conductivity of 3.3 W m −1 K −1 . In addition, the power factor and figure‐of‐merit reached enormously high values of 16.3 µW cm −1 K −2 and 0.53, respectively. This represents the highest thermoelectric performance reported to date not only for electrospun, polycrystalline calcium cobaltite fiber ceramics, but also for undoped polycrystalline calcium cobaltite ceramics. Cobaltite ; Electrospinning ; Materials science ; Ceramic ; Thermoelectric effect ; Composite material ; Spark plasma sintering ; Plasma ; SPARK (programming language) ; Dual (grammatical number) ; Metallurgy ; Polymer Advanced Thermoelectric Materials and Devices ; Phase Change Materials Research ; Thermal properties of materials
Authors: Andreas Sebastian Loureiro Mendez | Matthew S. Halquist
Source: Drug Analytical Research (article, 2024-12-28)
Field: Chemistry — Spectroscopy

A short reflection addressed to the analysts about the relationship between mass spectrometry and sample preparation Mass spectrometry is one of the most advanced technology applied to qualitative and quantitative analysis. The complexity related to this technique is not the only critical aspect to be considered in the routine of analysis. Actually the quality of analytical results is dependent on previous steps involved to the sample preparation, where well established protocols, conditions, solvents, dilutions, i.e. are crucial to have excellence in the analytical performance. All analysts involved must be qualified and recognize the importance of an integrative view about the sample, from different sources, complex or not, and the protocols to be applied sequentially in order to get prepared for a running through mass spectrometry or hyphenated system (LC-MS). In this work, through a simple and short reflection, the analysts are encouraged to reflect deeply about the importance of these two topics – mass spectrometry and sample preparation – to get excellence during the analytical routine. Sample (material) ; Mass spectrometry ; Reflection (computer programming) ; Sample preparation ; Analytical Chemistry (journal) ; Chemistry ; Computer science ; Chromatography Mass Spectrometry Techniques and Applications ; Pesticide Residue Analysis and Safety