jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Ahmed S. Al‐Fatesh | Samsudeen Olajide Kasim | Ahmed A. Ibrahim | Ahmed I. Osman | Ahmed E. Abasaeed | Hanan Atia | Udo Armbruster | Leone Frusteri | Abdulrahman Bin Jumah | Yousef Mohammed Alanazi | Anis H. Fakeeha
Source: Fuel (article, 2022-08-11)
Field: Materials Science — Materials Chemistry

Greenhouse gases utilization via catalytic reforming with Sc promoted Ni/SBA-15 This study investigated the performance of supported Ni catalysts in the utilization of greenhouse gases like CO2 and CH4 via dry reforming. The support SBA-15 was impregnated first with Sc at different loadings (0.5, 1, and 3 wt.%) and then with Ni (5 wt.%). The catalysts were first tested up to 8 h on stream with stoichiometric feed as well as methane in excess. The as-prepared catalysts were characterized using BET, XRD, TPR, CO2-TPD, XPS, TGA, and TEM. This is in accordance with the surface area measurement, XRD, and TEM data. The Ni added to Sc-SBA-15 appeared to interact with both the support and Sc as the intensity and reduction temperature of the Sc promoted catalysts increased relatively to the unpromoted sample depending on Sc content. The catalyst with 0.5 wt.% Sc loading led to the highest conversion and the lowest relative activity loss. The CH4 and CO2 conversions, on average, were 78 and 86 %, respectively, at the end of the runs at 750 °C. The final H2/CO ratio was 0.99, which is a good value compared to many literature catalysts. This catalyst also showed relatively constant CH4 and CO2 conversions over 80 h on stream. Increasing the Sc loading above 0.5 wt.% was not beneficial in terms of activity. Catalysis ; Methane ; Stoichiometry ; X-ray photoelectron spectroscopy ; Carbon dioxide reforming ; Chemistry ; Nuclear chemistry ; Materials science ; Chemical engineering ; Syngas ; Organic chemistry Catalytic Processes in Materials Science ; Catalysts for Methane Reforming ; Catalysis and Oxidation Reactions
Authors: Fabio Fanari | Gianluca Carboni | Francesco Desogus | Massimiliano Grosso | Manfred Wilhelm
Source: Food and Bioprocess Technology (article, 2022-03-23)
Field: Chemistry — Analytical Chemistry

A Chemometric Approach to Assess the Rheological Properties of Durum Wheat Dough by Indirect FTIR Measurements Abstract Rheological measurements and FTIR spectroscopy were used to characterize different doughs, obtained by commercial and monovarietal durum wheat flours (Cappelli and Karalis). Rheological frequency sweep tests were carried out, and the Weak Gel model, whose parameters may be related to gluten network extension and strength, was applied. IR analysis mainly focused on the Amide III band, revealing significant variations in the gluten network. Compared to the other varieties, Karalis semolina showed a higher amount of α-helices and a lower amount of β-sheets and random structures. Spectroscopic and rheological data were then correlated using Partial Least Squares regression (PLS) coupled with the Variable Importance in Projection (VIP) technique. The combined use of the techniques provided useful insights into the interplay among protein structures, gluten network features, and rheological properties. In detail, β-sheets and α-helices protein conformations were shown to significantly affect the gluten network's mechanical strength. Rheology ; Partial least squares regression ; Gluten ; Fourier transform infrared spectroscopy ; Food science ; Materials science ; Chemistry ; Mathematics ; Chemical engineering ; Composite material ; Statistics Spectroscopy and Chemometric Analyses ; Food composition and properties ; Polysaccharides Composition and Applications
Authors: Hyounghan Kwon | Tianzhe Zheng | Andrei Faraon
Source: Nature Communications (article, 2022-10-03)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Nano-electromechanical spatial light modulator enabled by asymmetric resonant dielectric metasurfaces Spatial light modulators (SLMs) play essential roles in various free-space optical technologies, offering spatio-temporal control of amplitude, phase, or polarization of light. Beyond conventional SLMs based on liquid crystals or microelectromechanical systems, active metasurfaces are considered as promising SLM platforms because they could simultaneously provide high-speed and small pixel size. However, the active metasurfaces reported so far have achieved either limited phase modulation or low efficiency. Here, we propose nano-electromechanically tunable asymmetric dielectric metasurfaces as a platform for reflective SLMs. Exploiting the strong asymmetric radiation of perturbed high-order Mie resonances, the metasurfaces experimentally achieve a phase-shift close to 290<sup>∘</sup>, over 50% reflectivity, and a wavelength-scale pixel size. Electrical control of diffraction patterns is also achieved by displacing the Mie resonators using nano-electro-mechanical forces. This work paves the ways for future exploration of the asymmetric metasurfaces and for their application to the next-generation SLMs. Materials science ; Spatial light modulator ; Optoelectronics ; Dielectric ; Polarization (electrochemistry) ; Resonator ; Optics ; Diffraction ; Phase modulation ; Metamaterial ; Phase (matter) ; Nano- ; Physics Metamaterials and Metasurfaces Applications ; Advanced Antenna and Metasurface Technologies ; Orbital Angular Momentum in Optics
Authors: Onur Dogu | Andreas Eschenbacher | Robin John Varghese | Maarten R. Dobbelaere | Dagmar D’hooge | Paul Van Steenberge | Kevin M. Van Geem
Source: Chemical Engineering Journal (article, 2022-12-05)
Field: Materials Science — Polymers and Plastics

Bayesian tuned kinetic Monte Carlo modeling of polystyrene pyrolysis: Unraveling the pathways to its monomer, dimers, and trimers formation Trimer ; Polystyrene ; Styrene ; Monomer ; Pyrolysis ; Kinetic Monte Carlo ; Dimer ; Chemistry ; Polymer chemistry ; Polymerization ; Materials science ; Yield (engineering) ; Thermodynamics ; Physical chemistry ; Chemical engineering ; Monte Carlo method ; Copolymer ; Polymer ; Organic chemistry ; Composite material Polymer crystallization and properties ; Thermochemical Biomass Conversion Processes ; Thermal and Kinetic Analysis
Authors: Zonglong Li | Chou-Hung Hsueh | Zhuozhuo Tang | Jia Chen | Xiaolin Wang | Hao Cui | Yang Yang | Xiaodan Wang | Dongsheng Ren | Hongqiang Gao | Mingyang Li | Hong Xu | Xiangming He
Source: SusMat (article, 2022-03-28)
Field: Materials Science — Materials Chemistry

Rational design of imine‐linked three‐dimensional mesoporous covalent organic frameworks with bor topology Abstract Three‐dimensional (3D) covalent organic frameworks (COFs) possess great potential applications in various fields. Constructing 3D COFs with large pore sizes is extremely challenging due to the interpenetration and collapse. Herein, we report a series of crystalline imine‐linked 3D COFs (3D‐bor‐COF‐1, 3D‐bor‐COF‐2, 3D‐bor‐COF‐3) with mesoporous channels through rationally designing the topology configuration. These 3D‐bor‐COFs display permanent porosity and Brunauer–Emmett–Teller (BET) surfaces of 3205.5, 1752.7, and 2077.3 m 2 g −1 ( S Langmuir = 4277.7, 2480.3, and 2698.0 m 2 g −1 ), respectively. The pore sizes of 3D‐bor‐COFs were confirmed by the lattice fringes from high‐resolution transmission electron microscopy, as well as structural simulation and nitrogen adsorption isotherm analysis. 3D‐bor‐COFs display large pore sizes (3.8 nm for 3D‐bor‐COF‐3), which is among the highest record of 3D COFs. Owing to the unstacked‐aromatic pore environment and high specific surface area, 3D‐bor‐COFs display excellent adsorption capacity for benzene vapor (1203.9 mg g −1 for 3D‐bor‐COF‐3) under 298 K, which is three times higher than that of the best‐reported 2D COF. This work not only provides inspiration for designing 3D mesoporous imine‐COFs, but also demonstrates a strategy for constructing aromatics adsorption materials. Mesoporous material ; Imine ; Covalent organic framework ; Adsorption ; Covalent bond ; Materials science ; Porosity ; Chemical engineering ; Topology (electrical circuits) ; Nanotechnology ; Chemistry ; Physical chemistry ; Organic chemistry ; Composite material ; Catalysis Covalent Organic Framework Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Luminescence and Fluorescent Materials
Authors: Haoqiang Ai | Feifei Li | Haoyun Bai | Dong Liu | Kin Ho Lo | Shengyuan A. Yang | Yoshiyuki Kawazoe | Hui Pan
Source: npj Computational Materials (article, 2022-04-08)
Field: Materials Science — Materials Chemistry

Ferroelectricity coexisted with p-orbital ferromagnetism and metallicity in two-dimensional metal oxynitrides Abstract Two-dimensional (2D) multiferroics have attracted increasing interests in basic science and technological fields in recent years. However, most reported 2D magnetic ferroelectrics are based on the d -electron magnetism, which makes them rather rare due to the empirical d 0 rule and limits their applications for low magnetic phase transition temperature. In this work, we demonstrate that the ferroelectricity can coexist with the p -electron-induced ferromagnetism without the limitation of d 0 rule and metallicity in a family of stable 2D MXene-analogous oxynitrides, X 2 NO 2 ( X = In, Tl). Remarkably, the itinerant character of p electrons can lead to the strong ferromagnetic metallic states. Furthermore, a possible magnetoelectric effect is manifested in a Tl 2 NO 2 /WTe 2 heterostructure through the interface engineering. Our findings provide an alternative possible route toward 2D multiferroics and enrich the concept of ferroelectric metals. Ferromagnetism ; Ferroelectricity ; Condensed matter physics ; Magnetism ; Multiferroics ; Materials science ; Phase (matter) ; Electron ; Metallicity ; Physics ; Quantum mechanics ; Optoelectronics MXene and MAX Phase Materials ; 2D Materials and Applications ; Multiferroics and related materials
Authors: Fabiane J. Trindade | Sergio Damasceno | Larissa Otubo | Marissol Rodrigues Felez | Daniel Zanetti de Florio | Fábio C. Fonseca | André S. Ferlauto
Source: ACS Applied Nano Materials (article, 2022-06-24)
Field: Materials Science — Materials Chemistry

Tuning of Shape, Defects, and Disorder in Lanthanum-Doped Ceria Nanoparticles: Implications for High-Temperature Catalysis The design of nanomaterials by tailoring the size, shape, and surface chemistry has a significant impact on their properties. The fine-tuning of structural defects of ceria rod-like and cube-like-shaped nanoparticles was performed via La3+ doping in molar ratios of 0–70 mol %. Morphology control was achieved by varying the hydrothermal synthesis temperature. For LaxCe1–xO2–x/2 samples prepared at 110 °C, nanorod-like structures are obtained for x < 0.30 and a random morphology of interconnecting polyhedra is achieved for a larger x. The ceria fluorite crystalline structure is maintained at an x of up to 0.60, and both Raman and X-ray diffraction results indicate a high level of defects and disorder in the crystalline structure. For LaxCe1–xO2–x/2 samples prepared at 180 °C, cube-shaped particles are predominant for an x of up to 0.10; however, for x > 0.20, two fluorite phases with different lattice parameters are associated with two distinct shapes, cubes and rods The La concentration in nanocubes is limited to x = 0.10 even for samples prepared with higher nominal La concentrations, whereas the nanorods contain larger La concentrations. The demonstrated morphology and defect control on La-doped ceria nanoparticles are critical for applications such as high-temperature oxide catalysts. Nanorod ; Fluorite ; Materials science ; Nanoparticle ; Nanomaterials ; Raman spectroscopy ; Lanthanum ; Doping ; Morphology (biology) ; Chemical engineering ; Catalysis ; Nanotechnology ; Hydrothermal circulation ; Crystallography ; Inorganic chemistry ; Chemistry ; Metallurgy Catalytic Processes in Materials Science ; Electronic and Structural Properties of Oxides ; Advancements in Solid Oxide Fuel Cells
Authors: Haina Ci | Jingtao Chen | Hao Ma | Xiaoli Sun | Xingyu Jiang | Kaicong Liu | Jingyuan Shan | Xueyu Lian | Bei Jiang | Ruojuan Liu | Bingzhi Liu | Guiqi Yang | Wan‐Jian Yin | Wen Zhao | Lizhen Huang | Teng Gao | Jingyu Sun | Zhongfan Liu
Source: Advanced Materials (article, 2022-10-08)
Field: Materials Science — Materials Chemistry

Transfer‐Free Quasi‐Suspended Graphene Grown on a Si Wafer The direct growth of graphene affording wafer-scale uniformity on insulators is paramount to electronic and optoelectronic applications; however, it remains a challenge to date, because it entails an entirely different growth mode than that over metals. Herein, the metal-catalyst-free growth of quasi-suspended graphene on a Si wafer is demonstrated using an interface-decoupling chemical vapor deposition strategy. The employment of lower-than-conventional H<sub>2</sub> dosage and concurrent introduction of methanol during growth can effectively weaken the interaction between the synthesized graphene and the underlying substrate. The growth mode can be thus fine-tuned, producing a predominantly monolayer graphene film with wafer-level homogeneity. Graphene thus grown on a 4 inch Si wafer enables the transfer-free fabrication of high-performance graphene-based field-effect transistor arrays that exhibit almost no shift in the charge neutral point, indicating a quasi-suspended feature of the graphene. Moreover, a carrier mobility up to 15 000 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup> can be attained. This study is anticipated to offer meaningful insights into the synthesis of wafer-scale high-quality graphene on dielectrics for practical graphene devices. Graphene ; Materials science ; Wafer ; Chemical vapor deposition ; Nanotechnology ; Monolayer ; Field-effect transistor ; Transistor ; Graphene nanoribbons ; Fabrication ; Optoelectronics ; Voltage ; Electrical engineering Graphene research and applications ; 2D Materials and Applications ; Graphene and Nanomaterials Applications
Authors: Bastian Reiprich | Karolina A. Tarach | Kamila Pyra | Gabriela Grzybek | Kinga Góra‐Marek
Source: ACS Applied Materials & Interfaces (article, 2022-01-25)
Field: Chemistry — Inorganic Chemistry

High-Silica Layer-like Zeolites Y from Seeding-Free Synthesis and Their Catalytic Performance in Low-Density Polyethylene Cracking Layer-like FAU-type zeolite Y was synthesized by an organosilane-assisted low-temperature hydrothermal method and its catalytic activity was verified in the low-density polyethylene (LDPE) cracking process. The synthesis procedure of high-silica layer-like zeolite Y was based on organosilane as a growth modifier, and for the first time, the seeding step was successfully avoided. The X-ray diffraction and electron microscopy studies, scanning electron microscopy and transmission electron microscopy confirmed the formation of pure FAU structure and zeolite particles of plate-like morphology arranged in the manner of the skeleton of a cuboctahedron. The <i>in situ</i> Fourier transform infrared (FT-IR) spectroscopic studies, low-temperature nitrogen sorption, and electron microscopy results provided detailed information on the obtained layer-like zeolite Y. The acidic and textural properties of layer-like zeolites Y were faced with the catalytic activity and selectivity in the cracking of LDPE. The quantitative assessment of catalyst selectivity performed in FT-IR/GC-MS <i>operando</i> studies pointed out that LDPE cracking over the layer-like material yielded value-added C<sub>3</sub>-C<sub>4</sub> gases and C<sub>5</sub>-C<sub>6</sub> liquid fraction at the expense of C<sub>7+</sub> fraction. The detailed analysis of coke residue on the catalyst was also performed by means of FT-IR spectroscopy, thermogravimetric analysis, and thermoprogrammed oxidation coupled with mass spectrometry for the detection of oxidation products. The acidic and textural properties gave a foundation for the catalytic performance and coking of catalysts. Materials science ; Zeolite ; Catalysis ; Fluid catalytic cracking ; Scanning electron microscope ; Low-density polyethylene ; Thermogravimetric analysis ; Chemical engineering ; Polyethylene ; Fourier transform infrared spectroscopy ; Selectivity ; Cracking ; Organic chemistry ; Composite material ; Chemistry Zeolite Catalysis and Synthesis ; Mesoporous Materials and Catalysis ; Catalysis and Hydrodesulfurization Studies
Authors: Ke Wang | Qian Ma | Hongtao Zhou | Jumei Zhao | Miao Cao | Shudong Wang
Source: Autex Research Journal (article, 2022-02-04)
Field: Materials Science — Biomaterials

Review on Fabrication and Application of Regenerated <i>Bombyx mori</i> Silk Fibroin Materials Abstract Natural silk fiber derived from the Bombyx mori (B. mori) silkworm has long been used as a luxury raw material in textile industry because of its shimmering appearance and durability, and as surgical suture for its high strength and flexibility. Regenerated silk fibroin, as the main protein extracted from the cocoons of the B. mori silkworm, recently has gained considerable attention due to its outstanding properties, including facile processability, superior biocompatibility, controllable biodegradation, and versatile functionalization. Tremendous effort has been made to fabricate silk fibroin into various promising materials with controlled structural and functional characteristics for advanced utilities in a multitude of biomedical applications, flexible optics, electronics devices, and filtration systems. Herein, reverse engineered silk fibroin extraction methods are reviewed, recent advances in extraction techniques are discussed. Fabrication methods of silk fibroin materials in various formats are also addressed in detail; in particular, progress in new fabrication technologies is presented. Attractive applications of silk fibroin-based materials are then summarized and highlighted. The challenges faced by current approaches in production of silk fibroin-based materials and future directions acquired for pushing these favorable materials further toward above mentioned applications are further elaborated. Fibroin ; Bombyx mori ; SILK ; Materials science ; Biocompatibility ; Textile ; Nanotechnology ; Fabrication ; Sericin ; Polymer science ; Composite material ; Chemistry Silk-based biomaterials and applications ; Electrospun Nanofibers in Biomedical Applications ; RNA Interference and Gene Delivery
Authors: Kun Luo | Yanmei Wen | Xinhuang Kang
Source: Molecules (review, 2022-07-20)
Field: Materials Science — Materials Chemistry

Halogen-Doped Carbon Dots: Synthesis, Application, and Prospects Carbon dots (CDs) have many advantages, such as tunable photoluminescence, large two-photon absorption cross-sections, easy functionalization, low toxicity, chemical inertness, good dispersion, and biocompatibility. Halogen doping further improves the optical and physicochemical properties of CDs, extending their applications in fluorescence sensors, biomedicine, photocatalysis, anti-counterfeiting encryption, and light-emitting diodes. This review briefly describes the preparation of CDs via the "top-down" and "bottom-up" approaches and discusses the preparation methods and applications of halogen (fluorine, chlorine, bromine, and iodine)-doped CDs. The main challenges of CDs in the future are the elucidation of the luminescence mechanism, fine doping with elements (proportion, position, etc.), and their incorporation in practical devices. Halogen ; Doping ; Photoluminescence ; Materials science ; Nanotechnology ; Luminescence ; Surface modification ; Carbon fibers ; Biocompatibility ; Bromine ; Chemistry ; Optoelectronics ; Organic chemistry ; Physical chemistry Carbon and Quantum Dots Applications ; Nanocluster Synthesis and Applications ; Mercury impact and mitigation studies
Authors: Shufang Wang
Source: Materials Lab (article, 2022-01-01)
Field: Materials Science — Materials Chemistry

Bi(2-x)SbxTe3 Thermoelectric Composites with High Average zT Values: From Materials to Devices (Bi,Sb)Te-based materials have drawn extensive attention for nearly two centuries as one of the most successful commercial thermoelectric (TE) materials. However, Bi(2-x)SbxTe3 composites with remarkable average figure of merit (zTavg) values are highly desired in terms of the great contribution on expanding the applying temperature ranges of the commercial devices. Herein, Bi0.35Sb1.65Te3 compound with outstanding zTavg value of about 1.18 (integrate from 298 to 498 K) was obtained via delaying the bipolar effect by precipitating multi-scale Sb2Te3 inclusions. The power factor (PF) was enhanced from 2.1×10−3 Wm−1 K−2 (Bi0.5Sb1.5Te3) to 4.3×10−3 Wm−1 K−2 (Bi0.35Sb1.65Te3) by optimizing the carrier concentration from 1.9×1019 cm−3 to 3.9×1019 cm−3 via adjusting the proportions of Bi:Sb. Correspondingly, the lattice thermal conductivities (kl) were distinctly suppressed by the additional multiple phonon scattering resulting from the Sb2Te3 precipitates. Consequently, a remarkable zTmax, as high as ~1.35 at 373 K was obtained in the Bi0.35Sb1.65Te3 sample. The temperature difference ( T, 6.0 A current) of the TE device that assembled with the commercial N-type Bi(Te,Se) ingot has reached up to 66.9 K. The high zTavg, zTmax and T values will further promote the commercial applications of (Bi,Sb)Te-based materials in a wide temperature range. Thermoelectric effect ; Ingot ; Materials science ; Figure of merit ; Thermoelectric materials ; Phonon scattering ; Atmospheric temperature range ; Seebeck coefficient ; Composite material ; Analytical Chemistry (journal) ; Optoelectronics ; Thermal conductivity ; Thermodynamics ; Chemistry ; Alloy ; Physics Advanced Thermoelectric Materials and Devices ; Thermal Radiation and Cooling Technologies ; Thermal properties of materials
Authors: Coline Mahé | Régis Lavigne | Emmanuelle Com | Charles Pineau | Yann Locatelli | Aleksandra Maria Zlotkowska | C. Almiñana | Guillaume Tsikis | Pascal Mermillod | Jennifer Schoen | Marie Saint‐Dizier
Source: Scientific Reports (article, 2022-03-09)
Field: Chemistry — Spectroscopy

Spatiotemporal profiling of the bovine oviduct fluid proteome around the time of ovulation Abstract Understanding the composition of the oviduct fluid (OF) is crucial to better comprehend the microenvironment in which sperm capacitation, fertilization and early embryo development take place. Therefore, our aim was to determine the spatiotemporal changes in the OF proteome according to the anatomical region of the oviduct (ampulla vs. isthmus), the proximity of the ovulating ovary (ipsilateral vs . contralateral side) and the peri-ovulatory stage (pre-ovulatory or Pre-ov vs . post-ovulatory or Post-ov). Oviducts from adult cyclic cows were collected at a local slaughterhouse and pools of OF were analyzed by nanoLC-MS/MS and label-free protein quantification (n = 32 OF pools for all region × stage × side conditions). A total of 3760 proteins were identified in the OF, of which 65% were predicted to be potentially secreted. The oviduct region was the major source of variation in protein abundance, followed by the proximity of the ovulating ovary and finally the peri-ovulatory stage. Differentially abundant proteins between regions, stages and sides were involved in a broad variety of biological functions, including protein binding, response to stress, cell-to-cell adhesion, calcium homeostasis and the immune system. This work highlights the dynamic regulation of oviduct secretions and provides new protein candidates for interactions between the maternal environment, the gametes and the early embryo. Oviduct ; Ovulation ; Proteome ; Profiling (computer programming) ; Andrology ; Bioinformatics ; Computational biology ; Biology ; Computer science ; Endocrinology ; Medicine ; Hormone Advanced Proteomics Techniques and Applications ; Molecular Biology Techniques and Applications ; Identification and Quantification in Food