jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: M.A. Dabban | Ammar Qasem
Source: Electronic Journal of University of Aden for Basic and Applied Sciences (article, 2022-09-30)
Field: Materials Science — Materials Chemistry

TUNING THE STRUCTURAL, OPTICAL AND PHOTOVOLTAIC CHARACTERISTICS OF FABRICATED N-TIO\(_2\)/P-CUO AND N-TIO\(_2\)/P-CU\(_2\)O SOLAR CELLS BY CHANGING THE BACK CONTACT ELECTRODES The current work focuses on working a comparison between two solar cells made with the combination, n-TiO2/p-CuO, and n-TiO2/p-Cu2O devices. The structural, optical, and photovoltaic characteristics were detailed. In the optical section, the optical measurements for the TiO2 (120 nm), CuO (200 nm), and Cu2O (200 nm) thin films were illustrated, and then the energy of optical transition was calculated based on the Tauc formula for each layer. The direct optical gap energies of TiO2, CuO, and Cu2O thin films are 3.24, 1.77, and 2.18 eV, respectively. The front contact electrode in both systems is an ITO- coated glass layer, while the back contact electrodes are Pt, Ni, Au, Co, Ag, Cu, Al, and Mo. The effect of various metals as back contact electrodes on the photovoltaic characteristics of fabricated devices was investigated. The optical and structural characteristics showed the superiority of the fabricated device n-TiO2/p-CuO over the fabricated device n-TiO2/p-Cu2O. Materials science ; Electrode ; Layer (electronics) ; Optoelectronics ; Photovoltaic system ; Thin film ; Band gap ; Solar cell ; Nanotechnology ; Electrical engineering ; Chemistry Copper-based nanomaterials and applications ; Chalcogenide Semiconductor Thin Films ; Solar Thermal and Photovoltaic Systems
Authors: Aref Abbasi Moud
Source: Preprints.org (review, 2022-11-14)
Field: Chemistry — Analytical Chemistry

Asphaltene Modeling, Emulsion, and Aggregation: A Review Asphaltene is a component of crude oil that, if mishandled, may create substantial transportation and industrial concerns. It is a solid by nature, with a diverse set of molecular compositions. Furthermore, the oil industry has identified emulsion generation and clogging precipitate as key concerns. The emulsified water droplets in the process are just what give the raw oil its increased viscosity; hence, power is squandered to transport the oil around. The information has been separated into sections based on simulation, solubilization, agglomeration, precipitation, and evidence of model chemicals in the literature. We have included research that investigates the bulk rheology and interfacial rheology of asphaltene to describe its interfacial activity more clearly. Asphaltene ; Emulsion ; Rheology ; Viscosity ; Chemical engineering ; Component (thermodynamics) ; Economies of agglomeration ; Petroleum engineering ; Materials science ; Process engineering ; Chemistry ; Thermodynamics ; Geology ; Composite material ; Engineering Petroleum Processing and Analysis ; Enhanced Oil Recovery Techniques ; NMR spectroscopy and applications
Authors: Veronica N. Nwobasi | Philomena K. Igbokwe | A. O. Okewale
Source: Asian Journal of Chemical Sciences (article, 2022-07-08)
Field: Chemistry — Organic Chemistry

Empirical Modelling and Optimization of Ngbo Pillarred Activated Clay Catalysts using Response Surface Methodology In this work, Box-Behnken”s Response Surface Methodology (RSM) was applied to study the esterification reaction effectiveness of Ngbo pillarred activated clay catalyst. The esterification was monitored based on temperature, time duration, amount of reactant, catalyst weight, and particle size. The Box--Behnken’s Response Surface Methodology indicates that the pillarred clay-catalyzed esterification reactions proceed through dual Acid-complex and Alcohol-complex mechanisms, with the Alcohol mechanism dominating. The esterification efficiencies of acetic acid and ethanol by acid-activated Ngbo clay catalyst optimized using RSM models indicated the estimated esterification percentage of ˃99%. The predicted and experimental values under the same conditions showed less than 5% difference, making the Box-Behnken design approach an efficient, effective, and reliable method for the esterification of acetic acid with ethanol. The produced catalyst was optimized using A-One way ANOVA modelling, which indicated the correlation coefficient of the regression of 0.8674, implying that 86.74% of the total variation in the esterification reaction was attributed to the experimental variables. The result obtained indicated that the process could be applied in the esterification of acetic acid to avoid the drawbacks of corrosion, loss of catalyst and environmental problems. Response surface methodology ; Catalysis ; Box–Behnken design ; Acetic acid ; Ethanol ; Chemistry ; Alcohol ; Particle size ; Chemical engineering ; Nuclear chemistry ; Chromatography ; Organic chemistry ; Physical chemistry Surfactants and Colloidal Systems ; Thermal and Kinetic Analysis ; Chemistry and Chemical Engineering
Authors: Fangchen Zhen
Source:  (preprint, 2022-07-18)
Field: Chemistry — Electrochemistry

Transfert d'électrons dans les eutectiques profonds : de la cinétique aux effets de liaisons hydrogène et de paires d'ions Deep Eutectic Solvents (DES) are a new class of solvents displaying very interesting properties for applications in electrochemistry. In this context, the objectives of this thesis are to obtain a better knowledge and description of the fundamental properties of DES for electrochemistry. A first part of the thesis concerns the study of charge transfer kinetics in ethaline. Standard rate constants, ks are measured for common redox couples and compared to data in conventional ionic liquids and organic solvents. The measured values of ks are only a little lower than those measured in conventional solvents. The data are discussed in view of the solvent relaxation times using Marcus theory for an adiabatic electron transfer. Effects of the presence of water are then examined. Surprisingly, ks values that are measured for the ferrocyanide oxidation do not considerably vary with the amount of water or the viscosity of ethaline contrary to theoretical predictions and behavior in common solvents. The next two chapters are devoted to the studies of redox systems where the electron transfers are coupled to proton transfers with the examples of the reductions of quinones and aromatic nitro derivatives. Results are discussed according to the existence of ions pairs and hydrogen bonding between the solute and the components of the DES opening a route to a control of the redox properties by an appropriate choice of the DES. Kinetics ; Pairing ; Eutectic system ; Hydrogen bond ; Ion ; Electron transfer ; Chemistry ; Materials science ; Chemical physics ; Physical chemistry ; Crystallography ; Organic chemistry ; Molecule ; Physics ; Condensed matter physics Electrochemical Analysis and Applications ; Ionic liquids properties and applications ; Chemical and Physical Properties in Aqueous Solutions
Authors: Don McTaggart | Jack D. Sundberg | Lauren M. McRae | Scott C. Warren
Source: ChemRxiv (preprint, 2022-10-10)
Field: Chemistry — Inorganic Chemistry

Assessing ternary materials for fluoride-ion batteries Although lithium‐ion batteries have transformed energy storage, there is a need to develop battery technologies with improved performance. Fluoride‐ion batteries (FIBs) may be promising alternatives in part due to their high theoretical energy density and natural elemental abundance. However, electrode materials for FIBs, particularly cathodes, have not been systematically evaluated, limiting rapid progress. Here, we evaluate ternary fluorides from the Materials Project crystal structure database to identify promising cathode materials for FIBs. Structures are further assessed based on stability and whether fluorination/defluorination occurs without unwanted disproportionation reactions. Properties are presented for pairs of fluorinated/defluorinated materials including theoretical energy densities, cost approximations, and bandgaps. We aim to supply a dataset for extracting property and structural trends of ternary fluoride materials that may aid in the discovery of next‐generation battery materials. Ternary operation ; Fluoride ; Battery (electricity) ; Limiting ; Materials science ; Disproportionation ; Ion ; Cathode ; Lithium (medication) ; Energy density ; Energy storage ; Inorganic chemistry ; Engineering physics ; Computer science ; Chemistry ; Thermodynamics ; Physical chemistry ; Catalysis ; Organic chemistry ; Engineering ; Mechanical engineering ; Physics Inorganic Fluorides and Related Compounds ; Inorganic Chemistry and Materials
Authors: Z. G. Akhvlediani | Alma Dauletbekova | Guldar Baubekova | Zhadyra Malikova | V. Sokhadze
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Materials Chemistry

Influence of neutron irradiation conditions on maximal frequency of infrared absorption spectra of LiF:OH Neutron ; Irradiation ; Absorption (acoustics) ; Infrared ; Spectral line ; Infrared spectroscopy ; Materials science ; Optoelectronics ; Optics ; Physics ; Nuclear physics ; Composite material Luminescence Properties of Advanced Materials ; Solid-state spectroscopy and crystallography ; Glass properties and applications
Authors: Dmitry Spasskiy | А. Н. Васильев | Vitaly Nagirnyi | Irina Kudryavtseva | Dina V. Deyneko | Ivan V. Nikiforov | Ildar Kondrat’ev
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Materials Chemistry

New bright UV-C phosphors based on Y1-xScxPO4 solid solutions Phosphor ; Materials science ; Computer science ; Optoelectronics Luminescence Properties of Advanced Materials
Authors: Nikita Chervyakov | А. V. Boyarintsev | Ivan Teplov | С. А. Степанов
Source: Book of Abstracts (article, 2022-01-01)
Field: Chemistry — Inorganic Chemistry

Kinetic study of the oxidative dissolution of uranium dioxide and triuranium octaoxide in carbonate media Dissolution ; Carbonate ; Uranium ; Uranium dioxide ; Carbon dioxide ; Chemistry ; Kinetic energy ; Oxidative phosphorylation ; Environmental chemistry ; Materials science ; Metallurgy ; Physics ; Physical chemistry Radioactive element chemistry and processing ; Nuclear Materials and Properties ; Thermal and Kinetic Analysis
Authors: Murthy R. Akula | Derek Cressy | Dustin Osborne
Source: Book of Abstracts (article, 2022-01-01)
Field: Chemistry — Organic Chemistry

Synthesis of N-acetamido-4-deoxy-4-[F-18]fluoroglucosamine Computer science Carbohydrate Chemistry and Synthesis ; Glycosylation and Glycoproteins Research
Authors: Diana Chiper | Cătălin Stelian Tuță | G. Bubueanu | C. Postolache | Alexandra-Diana Chiper | Ioana-Cristina Chiper
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Materials Chemistry

Experimental study regarding new methods of radioactive decontamination and clean-up for materials that were contaminated with hydrogen-3 used in research laboratory Human decontamination ; Contamination ; Waste management ; Environmental science ; Radioactive waste ; Clean-up ; Radiochemistry ; Environmental chemistry ; Engineering ; Chemistry ; Chromatography Graphite, nuclear technology, radiation studies ; Nuclear and radioactivity studies
Authors: Yulian Zagranyarski | Monika Mutovska | Stanimir Stoyanov
Source: Book of Abstracts (article, 2022-01-01)
Field: Chemistry — Organic Chemistry

New powerful building block molecules in 1,8-naphthalimide chemistry Block (permutation group theory) ; Chemistry ; Molecule ; Computer science ; Combinatorial chemistry ; Organic chemistry ; Mathematics Chemical Reaction Mechanisms ; Inorganic and Organometallic Chemistry ; Synthesis and Characterization of Heterocyclic Compounds
Authors: Elena Savchenko | V. I. Sugakov | Mykhailo Bludov | I. V. Khyzhniy | Sergey Uyutnov
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Surfaces, Coatings and Films

Self-oscillations of particle yield from methane films irradiated with an electron beam: experiment and simulation Yield (engineering) ; Irradiation ; Electron ; Methane ; Cathode ray ; Particle (ecology) ; Materials science ; Beam (structure) ; Atomic physics ; Electron beam processing ; Physics ; Computational physics ; Molecular physics ; Optics ; Nuclear physics ; Chemistry ; Composite material Electron and X-Ray Spectroscopy Techniques ; Laser-induced spectroscopy and plasma ; Catalytic Processes in Materials Science
Authors: Graham Jackson
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Materials Chemistry

Use of Gd(III) MRI contrast agent as an in vivo probe for Zn(II) Contrast (vision) ; In vivo ; Gadolinium ; Magnetic resonance imaging ; Nuclear magnetic resonance ; Biomedical engineering ; Materials science ; Computer science ; Chemistry ; Radiology ; Medicine ; Artificial intelligence ; Physics ; Biology ; Metallurgy Lanthanide and Transition Metal Complexes ; Trace Elements in Health ; MRI in cancer diagnosis
Authors: Monika Mutovska | Yulian Zagranyarski
Source: Book of Abstracts (article, 2022-01-01)
Field: Chemistry — Spectroscopy

Fluorescent and colorimetric chemosensors for cations based on 1,8-naphthalimide core Fluorescence ; Core (optical fiber) ; Chemistry ; Photochemistry ; Computer science ; Physics ; Optics Molecular Sensors and Ion Detection ; Synthesis and Characterization of Heterocyclic Compounds ; Advanced Nanomaterials in Catalysis
Authors: А. Аkilbekov | В.А. Скуратов | Ainash T. Zhumazhanova | Alisher Mutali | Anel Ibrayeva | Ekaterina Korneeva | Sh. Giniyatova | Alma Dauletbekova
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Ceramics and Composites

Raman piezospectroscopic analysis of mechanical stress in silicon nitride and alumina nitride ceramics irradiated with fast bismuth ions Materials science ; Bismuth ; Raman spectroscopy ; Nitride ; Silicon nitride ; Irradiation ; Ceramic ; Stress (linguistics) ; Ion ; Silicon ; Metallurgy ; Composite material ; Optics ; Chemistry Advanced ceramic materials synthesis ; Semiconductor materials and devices ; Ion-surface interactions and analysis
Authors: Iulia Babutan | Otto Todor-Boer | Leonard Ionuț Atanase | Adriana Vulpoi | Simion Şimon | Ioan Botiz
Source: Book of Abstracts (article, 2022-01-01)
Field: Chemistry — Organic Chemistry

Self-assembly and crystallization of block copolymers on surfaces exposed to a well-controlled solvent vapor environment and observed by AFM Crystallization ; Copolymer ; Materials science ; Solvent ; Atomic force microscopy ; Self-assembly ; Chemical engineering ; Nanotechnology ; Block (permutation group theory) ; Polymer ; Chemistry ; Composite material ; Organic chemistry Advanced Polymer Synthesis and Characterization ; Block Copolymer Self-Assembly
Authors: Marija V. Pergal | Igor Kodranov | Dana Vasiljević-Radović | Jasmina Nikodinović‐Runić | Biljana Dojčinović | Dragan Manojlović | Bratislav Antić
Source: Book of Abstracts (article, 2022-01-01)
Field: Chemistry — Organic Chemistry

Polyurethane/ferrites composite materials: A study on antimicrobial activity Polyurethane (PU) nanocomposites are highly utilized in biomedical devices/implants due to their excellent mechanical properties, good biocompatibility, and low cytotoxicity. These PU nanocomposites with silver nanoparticles are well known potent antimicrobial agents. Biocompatible magnetic nanoparticles such as ferrites has also gained attention especially in various fields of drug delivery, biosensing and magnetic resonance imaging which requires highly specific magnetic nanoparticle (MNP) properties such as uniform size distribution, less agglomeration and stability in the biological medium. Among MNP, copper and zinc ferrites have been broadly applicable in biomedical, optoelectronic, catalysis and drug delivery. With a view to design PU/ferrites nanocomposites and to explore their antimicrobial potential, the present preliminary study reports the preparation of PU nanocomposites with copper ferrite and zinc ferrite (1 wt.%) and with the same composition. The nanocomposites were characterized using water absorption and swelling measurements. The antimicrobial activity of these composites was investigated against four bacterial strains: Staphylococcus aureus, Enterococcus faecium, Pseudomonas aeruginosa, and Klebsiella pneumoniae, and one Candida strain, C. albicans and compared with those of PU nanocomposites with silver ferrite nanoparticles. PU nanocomposites based on zinc and copper ferrites did not show antimicrobial activity, on the contrary they supported microbial attachment and growth. However, PU nanocomposites with silver ferrite did not show significant antibacterial activity but show antifungal activity and it is related with hydrophilicity of the prepared materials. Polyurethane ; Composite number ; Antimicrobial ; Materials science ; Composite material ; Chemistry ; Organic chemistry Multicomponent Synthesis of Heterocycles
Authors: Selcen Uzun Duran | Ümit Alver | B. Muçogllava | B. Demirköz | Fatih Özkalaycı
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Materials Chemistry

Determination of neutron absorption rates of 5% colemanite, ulexite, B2O3 doped HDPE materials Materials science ; Doping ; Boron ; Absorption (acoustics) ; Composite material ; Nuclear physics ; Physics ; Optoelectronics Radiation Shielding Materials Analysis ; Graphite, nuclear technology, radiation studies ; Nuclear Physics and Applications
Authors: N. Krutyak | D. Spassky | Dina V. Deyneko | Andrey Antropov | Vladimir A. Morozov | V. Nagirnyi
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Materials Chemistry

Novel NASICON-type Na3.6Lu1.8-x(PO4)3:xEu3+ phosphors: Structure and luminescence Phosphor ; Luminescence ; Fast ion conductor ; Materials science ; Structure type ; Optoelectronics ; Crystal structure ; Computer science ; Chemistry ; Electrolyte ; Crystallography ; Physical chemistry ; Electrode Luminescence Properties of Advanced Materials ; Solid-state spectroscopy and crystallography ; Radiation Detection and Scintillator Technologies
Authors: Simona Barna | Andreea Nicoleta Verdeș | Claudia Maxim | Daniela Șuteu
Source: Book of Abstracts (article, 2022-01-01)
Field: Chemistry — Spectroscopy

Applicability of hydroalcoholic extracts of Alchemilla Vulgaris in development of high added-value pharmaceutical products Value (mathematics) ; Computer science ; Machine learning Analytical Chemistry and Chromatography
Authors: Nikita Chervyakov | А. V. Boyarintsev | Ivan Teplov | Natalya Chalysheva | С. А. Степанов
Source: Book of Abstracts (article, 2022-01-01)
Field: Chemistry — Inorganic Chemistry

Oxidative dissolution of triuranium octaoxide in hydroxide-peroxide media Dissolution ; Peroxide ; Hydroxide ; Oxidative phosphorylation ; Hydrogen peroxide ; Chemistry ; Inorganic chemistry ; Organic chemistry ; Biochemistry Radioactive element chemistry and processing ; Catalysis and Oxidation Reactions
Authors: Raman Lukashevich | Aliaksei Zaharadniuk | Uladzimir Huzau
Source: Book of Abstracts (article, 2022-01-01)
Field: Materials Science — Materials Chemistry

Development of a standard dosimetric facility with protection against external radiation background for the metrological support of highly sensitive radiation monitoring devices in accordance with the requirements of international standards Metrology ; Radiation monitoring ; Radiation protection ; Dosimetry ; International standard ; Environmental science ; Systems engineering ; Radiation ; NIST ; Computer science ; Nuclear engineering ; Medical physics ; Engineering ; Physics ; Nuclear physics ; Nuclear medicine ; Optics ; Medicine ; Telecommunications Graphite, nuclear technology, radiation studies ; Radiation Dose and Imaging ; Radiation Effects and Dosimetry
Authors: Peter R. Stevenson | Robert Busch | Lirong Sun | Drake Austin | Jie Jiang | Paige Miesle | Michael A. Susner | Benjamin S. Conner | Ali Jawaid | Shannon Becks | K. Mahalingam | Michael Velez | Riccardo Torsi | Joshua A. Robinson | Rahul Rao | Nicholas R. Glavin | Ruth Pachter | Richard A. Vaia | W. Joshua Kennedy | Jonathan P. Vernon
Source: Research Square (preprint, 2022-10-12)
Field: Materials Science — Materials Chemistry

Exfoliation Procedure-Dependent Optical Properties of Solution Deposited MoS2 Films Exfoliation joint ; Materials science ; Chemical engineering ; Composite material ; Nanotechnology ; Engineering ; Graphene 2D Materials and Applications ; MXene and MAX Phase Materials ; Perovskite Materials and Applications
Authors: Liliya Batyuk | Natalya Kizilova
Source: EUREKA Life Sciences (article, 2022-11-16)
Field: Materials Science — Materials Chemistry

Development of modern nanotecnologies and combined biotoxicity problems Fast progress in modern nanotechnologies based on use of nanoparticles, nanofibers and nanotubes with different composition, shape and size allows elaboration of materials with superhigh strength, thermal and electric conductivity, acoustical and optical properties. Those materials are already widely used in industry, transportation, aerospace, marine and civil engineering, food processing and medicine. Some examples of nanoreinforces composites, superhydrophobic self-cleaning surfaces, nanodyes and suspensions of nanoparticles are described. The problem of uncontrolled accumulation of some types of nanoparticles in our cells and tissues is discussed within the concept of nanotoxicity. Since the history of permanent observation of human health in connection with nanodust accumulation in the atmosphere, waters and soils is not enough long, the detailed evidences must be documented, systematized and discussed.&#x0D; In this study a brief systematic review of literature on the biotoxicity problems caused by modern nanotechnologies is given. Production of the nanoparticles, nanofibers and nanotubes for industry, transportation, food processing, as well as utilization of the used materials which properties were modified by the nanotechnologies leads to permanent rise of the nanodust in the atmosphere, soils, river waters, lakes and the sea bottom. Their uncontrolled interaction with flora and fauna could be catastrophic for human health and life on the Earth. Promising ways for the problem solution and perspectives are discussed. Some own results on the protective action of nanodiamonds, silver and some other nanoparticles are presented. A vital necessity of an open access database on known types of nanoparticles, their use in the materials and documented influence of health of animals and humans is discussed Computer science Carbon Nanotubes in Composites ; Nanotechnology research and applications ; Chemical Reactions and Isotopes