jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: João J. Melo dos Santos | Evanimek B. Sabino da Silva | C. A. Paskocimas
Source: Preprints.org (preprint, 2023-11-20)
Field: Materials Science — Biomaterials

Thermal, Spectroscopy, and Mechanical Properties of Biodegradable Polymers and Reinforcements: A Green Approach Biocomposite membranes based on polylactic acid (PLA) and cellulose nanocrystals (CNCs) were developed using a scientific approach. Dicumyl peroxide (DCP) was used as a polymerization ini-tiator, while tin octoate (Sn(Oct)2) and triphenylphosphane (P(C6H5)3) were used as catalysts. A torque rheometer was used to mix the components of the biocomposite, and thin films was prepared by solvent casting. Fourier transform infrared (FTIR) spectroscopy confirmed the coupling between the PLA and CNCs. Field emission scanning electron microscopy (FESEM) showed that the CNCs were well-dispersed in the PLA matrix with an unimodal particle size distribution and a maximum particle size of around 200 nm. Thermogravimetric analysis (TGA) and differential scanning calo-rimetry (DSC) analysis demonstrated good thermal stability and improved biodegradability of the biocomposite membrane compared to pure PLA. Mechanical characterization showed a Young's modulus of 1.65 GPa, which is comparable to that of other composite materials, and a maximum tensile strength of 20.31 MPa, which is higher than that of pure PLA. These results suggest that the developed biocomposite membrane has potential applications in water filtration, food packaging, and biomedical devices. Biocomposite ; Materials science ; Thermogravimetric analysis ; Polylactic acid ; Fourier transform infrared spectroscopy ; Differential scanning calorimetry ; Composite material ; Thermal stability ; Chemical engineering ; Dynamic mechanical analysis ; Ultimate tensile strength ; Polymer ; Polymer chemistry ; Composite number biodegradable polymer synthesis and properties ; Advanced Cellulose Research Studies ; Nanocomposite Films for Food Packaging
Authors: Jean Yves Sikapi Fouda | Agnes Antoinette Ntoumba | Philippe Belle Ebanda Kedi | Thi Hai Yen Beglau | Marcus N. A. Fetzer | Till Strothmann | Tchangou Armel Florian | Sone Enone Bertin | Vandi Deli | Emmanuel Jean Teinkela Mbosso | Gustave Leopold Lehman | Emmanuel Albert Mpondo Mpondo | Gisèle Etamé Loé | François Eya’ane Meva | Christoph Janiak
Source: Journal of Pharmacognosy and Phytochemistry (article, 2023-09-01)
Field: Materials Science — Materials Chemistry

Impregnation of textile cotton material with Cymbopogon citratus-mediated silver nanoparticles and investigations by light, electron and hyperspectral microscopies The present study aims to design a cheap and environmentally friendly cotton textile impregnated with green synthesized silver nanoparticles from Cymbopogon citratus leaves. The silver nanoparticles were characterized by umtraviolet spectroscopy and powder X-ray diffraction. Analytical differences between impregnated and non-impregnated cotton textiles were assessed by light, and transmission electron microscopy (TEM). Hyperspectral microscopy reveals the presence of silver nanoparticles inside in situ impregnated cotton material and was coupled to emission spectroscopy to differentiate from cotton fabric giving insight for material quality control. TEM presents high-density dispersions of silver nanoparticles inside the cotton materials and lowest sizes for the in situ impregnated cotton material. The in situ nanomaterial shows differences in maximum emission compared to the cotton fabric, and the particles could be visualized by dark field microscopy. Water and nanoparticle solution retention capacities of the cotton fabrics were determined. The experiment suggests that the in situ impregnated cotton fabric had outstanding washing resistance. Cymbopogon citratus ; Silver nanoparticle ; Materials science ; Transmission electron microscopy ; Nanoparticle ; Nanomaterials ; Scanning electron microscope ; Textile ; Hyperspectral imaging ; Composite material ; Spectroscopy ; Chemical engineering ; Nanotechnology ; Chemistry ; Chromatography Nanoparticles: synthesis and applications ; Dyeing and Modifying Textile Fibers
Authors: Vira Gamaliia | Artem Zabuga | Gennadii Zabuga
Source: Acta Baltica Historiae et Philosophiae Scientiarum (article, 2023-12-15)
Field: Chemistry — Physical and Theoretical Chemistry

On the History of Developing Catalysis in Ukraine (1850s–1980s) The article is dedicated to the history of developing highly effective catalysts in the leading scientific institutions of Ukraine and explores the prerequisites for developing theories in physical chemistry, in particular those related to kinetics and catalysis. It highlights the significance of scientific discoveries at the turn of the 19th and 20th century and their application by native scientists to advance theoretical development in the field of chemistry. Special attention is paid to the works of Lev Pisarzhevskii, focusing on his advancements in electronic chemistry and, in particular, the electronic theory of catalysis. The article also outlines current challenges in creating highly efficient catalysts for the chemical and light industry, emphasizing the importance of such indicators of catalysts as activity and selectivity. Drawing on historical, scientific and patent data, the study investigates the process of creating a highly efficient catalyst for obtaining acrylic acid from acrolein. This catalyst holds a great ractical importance for the production of various polymers in industrial conditions. It is shown that, as a result of research conducted by native scientists of the Institute of Physical Chemistry of the Academy of Sciences of the Ukrainian SSR and the Chemistry Department of Kyiv State University, the catalyst K-2-5 was developed. The catalyst has good indicators for the industrial production of acrylic acid from acrolein. The authors also highlight works studying the properties of the obtained catalyst, specifically its porous structure, which is an important factor in catalytic processes. They extensively focus on the kinetic indicators of catalytic reactions that occur when using this catalyst. The article also emphasizes the relevance of these developments for advancing research in catalysis and chemical industrial production. Catalysis ; Chemistry ; Acrolein ; Political science ; Organic chemistry History and advancements in chemistry
Authors: Martin C. Wilding | Andrea Sella | Christopher A. Howard | Ana Jorge Sobrido | C. Richard A. Catlow
Source: Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences (article, 2023-09-11)
Field: Materials Science — Materials Chemistry

Exploring the length scales, timescales and chemistry of challenging materials (Part 2) This themed issue explores the different length and timescales that determine the physics and chemistry of a variety of key of materials, explored from the perspective of a wide range of disciplines, including physics, chemistry materials science, Earth science and biochemistry. The topics discussed include catalysis, chemistry under extreme conditions, energy materials, amorphous and liquid structure, hybrid organic materials and biological materials. The issue is in two parts, with this second set of contributions exploring hybrid organic materials, catalysis low-dimensional and graphitic materials, biological materials and naturally occurring, super-hard material as well as dynamic high pressure and new developments in imaging techniques pressure. This article is part of the theme issue 'Exploring the length scales, timescales and chemistry of challenging materials (Part 2)'. Nanotechnology ; Variety (cybernetics) ; Chemistry ; Theme (computing) ; Engineering physics ; Physics ; Materials science ; Computer science Graphene research and applications ; Metal-Organic Frameworks: Synthesis and Applications ; Machine Learning in Materials Science
Authors: Igor V. Alabugin
Source: Chemistry (article, 2023-11-27)
Field: Chemistry — Organic Chemistry

Chemistry: A Place to Publish Your Creative Multidisciplinary Research It is my pleasure to welcome you to Chemistry (ISSN: 2624-8549), an open access peer-reviewed journal that publishes both primary reports and reviews highlighting important advances in fundamental areas of chemistry and/or illustrating the central role of chemistry in bridging the physical and life sciences [...] Bridging (networking) ; Multidisciplinary approach ; Pleasure ; Chemistry ; Publication ; Library science ; Engineering ethics ; Psychology ; Sociology ; Computer science ; Political science ; Engineering ; Social science ; Neuroscience Radical Photochemical Reactions ; Innovative Microfluidic and Catalytic Techniques Innovation ; Oxidative Organic Chemistry Reactions
Authors: Muthana H Al-saidi | Hadi Hasan Hadi | Wurood Hasan Hadi
Source: Al-Kufa University Journal for Biology (article, 2023-01-28)
Field: Materials Science — Biomaterials

Nanotechnology: optimal applications in anti-cancer drug medicine treatment and diagnosis The scientific field devoted the importance of studying nanotechnology, which characterizes nanoparticles and their multi-purpose functions, especially nanomedicine techniques. The review focused on newer technologies in biomedical applications as a drug vector in cancer treatment. To occupy the center stage on most of the biological vectors of drugs for the treatment of cancer. Practically, chemical treatments have harm as they target cancerous and non-cancerous cells alike, the solubility is almost non-existent, and the inability of chemotherapy to penetrate cancerous cells, which opens the way for this technique with clear prospects for the aforementioned purpose. The ability to selectively deliver nano-drugs to targeted cancer cells in an optimal manner and to avoid non-specific interactions with healthy cells. The current review focuses on ways to improve the size, shape, and properties of nanomaterials that can be exploited in cancer therapy. The successful treatment of nanocarriers for cancer can be designed for the future as nanotherapies. Nanomedicine ; Nanocarriers ; Nanotechnology ; Cancer ; Cancer therapy ; Cancer treatment ; Applications of nanotechnology ; Drug ; Drug delivery ; Nanorobotics ; Medicine ; Pharmacology ; Nanoparticle ; Materials science ; Internal medicine Nanoparticle-Based Drug Delivery ; Graphene and Nanomaterials Applications ; Nanoplatforms for cancer theranostics
Authors: Changjiang Hu | Zhiwen Jiang | Qun‐Yan Wu | Shuiyan Cao | Qiuhao Li | Chong Chen | Li‐Yong Yuan | Yunlong Wang | Jing Peng | Wei‐Qun Shi | Maolin Zhai | Mehran Mostafavi | Jun Ma
Source: Research Square (preprint, 2023-02-09)
Field: Chemistry — Inorganic Chemistry

Sustainable high-energy radiation powering selective CO2 reduction to CH3OH over atomic dual-metal-sites embedded metal-organic framework Dual (grammatical number) ; Reduction (mathematics) ; Metal ; Materials science ; Metal-organic framework ; Bare metal ; Radiation ; Energy (signal processing) ; Environmental science ; Chemistry ; Metallurgy ; Physics ; Optics ; Organic chemistry Metal-Organic Frameworks: Synthesis and Applications ; CO2 Reduction Techniques and Catalysts ; Catalytic Processes in Materials Science
Authors: Md. Jaynal Abedin | Md. Sajib Hossain | M. Atikur Rahman | Ehsanul Azim | Md. Majibul Haque Babu | Md. Ibrahim Kholil | Alamgir Kabir
Source: AIP Advances (article, 2023-07-01)
Field: Materials Science — Materials Chemistry

Pressure induced tuning of the physical properties of SnZrO3 and SnHfO3: A first principle study Structural, electronic, optical, and mechanical properties of cubic SnZrO3 and SnHfO3 have been studied under different hydrostatic pressures within the framework of density functional theory. A strong atomic interaction resulting from a considerable drop in the lattice parameter and bond length was observed. The Sn–O and Hf/Zr–O showed strong ionic and weak covalent characteristics, respectively, and the bond strengths are found to enhance under the applied pressure. Poisson’s ratio of these compounds also supports the bonding nature. The external pressure remarkably changed the optical absorption and conductivity of the materials to a higher value in the UV region of the solar spectrum and the direct bandgap of Sn(Zr/Hf)O3 significantly reduced, thereby enhancing the conductivity. Likewise, in other optical parameters, the elastic properties exhibited some noticeable changes: the stiffness, ductility, anisotropy, hardness, and machinability of these materials were significantly increased due to external pressure. All the findings indicate the high potentiality of these compounds to be used in optoelectronics and photovoltaic applications in the UV spectrum under hydrostatic pressure. Materials science ; Density functional theory ; Hydrostatic pressure ; Ionic bonding ; Band gap ; Ambient pressure ; Bond length ; Covalent bond ; Silanes ; Optical conductivity ; Anisotropy ; Condensed matter physics ; Composite material ; Computational chemistry ; Optoelectronics ; Chemistry ; Ion ; Thermodynamics ; Physical chemistry ; Crystallography ; Optics ; Crystal structure ; Silane Electronic and Structural Properties of Oxides ; ZnO doping and properties ; Gas Sensing Nanomaterials and Sensors
Authors: Madeline  Dressel Dukes | Nynke Albertine Krans | Katherine Marusak | Stamp Walden | Tim Eldred | Alan Franks | Ben Larson | Yaofeng Guo | David Nackashi | John Damiano
Source:  (article, 2023-06-24)
Field: Materials Science — Surfaces, Coatings and Films

JoVE Video Dataset 3.4K Views. Protochips, Inc.. This technology was developed to make high performance TEM studies accessible to users of all skill levels. Furthermore, scientific advancements require the collaborative efforts of multiple investigators, so an efficient platform to share and analyze large, complex datasets is essential for successful research. Operando and in situ studies transform a TEM into a realtime nano laboratory, allowing researchers to explore the dynamic nano skill processes that control materials for properties. Computer science ; Metadata ; Software ; Synchronization (alternating current) ; Pixel ; Sample (material) ; Calibration ; Computer vision ; Artificial intelligence ; Data mining ; Computer graphics (images) Electron and X-Ray Spectroscopy Techniques ; Advanced Electron Microscopy Techniques and Applications ; Integrated Circuits and Semiconductor Failure Analysis
Authors: Thao Le Thi Phuong | Thoa Nguyen Thi Kim | Duyen Le Thi
Source: International Journal of Advanced Engineering Research and Science (article, 2023-01-01)
Field: Materials Science — Biomaterials

Adsorption of Ce3+ ions using a one-dimensional nanomaterial with natural halloysite-kaolinite dual components Rare earth elements are widely used in many technological domains, including reactants, alloying elements, catalysts, batteries, superconductors, etc., because of their unique electro-optical properties. Recovery and separation of rare earth elements are particularly crucial due to the steadily rising demand, as they can enhance scarce resources and reduce radiation-related waste disposal harm. Reports about the harmful effects of rare earth elements on microbes, plants, and animals have become increasingly common in recent years. More dangerously, residues from rare earth elements can build up in the human body through ingestion or digestion in the food chain. Finding a practical and affordable way to use rare earth elements or remove them from our surroundings is therefore essential. To extract these elements, halloysite is processed using a straightforward chemical procedure to produce rare earth metal ion adsorbent materials. The Halloysite that has been processed has a rod-shaped, one-dimensional nanomorphology. Halloysite-kaolinite is the two-phase version of the adsorbent material. The strong adsorption capacity of halloysite for Ce3+ is demonstrated by research findings. Halloysite adsorbs Ce3+ using the monolayer physical adsorption model and the pseudo-second-order adsorption kinetic equation. Halloysite ; Adsorption ; Kaolinite ; Materials science ; Chemical engineering ; Rare earth ; Earth (classical element) ; Nanotechnology ; Chemistry ; Composite material ; Metallurgy ; Physical chemistry ; Physics Clay minerals and soil interactions ; Extraction and Separation Processes ; Geochemistry and Elemental Analysis
Source: NanoWorld Journal (review, 2023-12-28)
Field: Chemistry — Organic Chemistry

Nanotechnological Approaches for Treating Textile Effluent: Environmental Aspects and Opportunities – A Review R. Shrivastava and N.K. Singh Textile industry is known for its significant contribution to the global economy; however, it poses considerable environmental challenges due to extensive water use and the generation of textile effluent as wastewater into the environment. Textile ; Environmental science ; Environmental planning ; Engineering ; Geography ; Archaeology Nanomaterials for catalytic reactions ; Dyeing and Modifying Textile Fibers ; Microplastics and Plastic Pollution
Authors: Sara N. Alektiar | Zachary K. Wickens
Source: Chem (article, 2023-05-26)
Field: Chemistry — Inorganic Chemistry

Rethinking catalyst design by using data science Phosphoric acid ; Catalysis ; Chirality (physics) ; Nanotechnology ; Enantioselective synthesis ; Combinatorial chemistry ; Covalent bond ; Chemistry ; Materials science ; Organic chemistry ; Physics Asymmetric Hydrogenation and Catalysis ; Surface Chemistry and Catalysis ; Asymmetric Synthesis and Catalysis
Authors: Xin Sun | Yuxuan Zhang | Hao Yang | Xiao‐Ming Ren
Source: Journal of Material Science and Technology Research (article, 2023-06-24)
Field: Materials Science — Biomaterials

Crystal Engineering for Achievement of Functional Materials Through Facile Intercalation of Lamella Mineral Kaolinite Abstract: Kaolinite, a layered clay mineral, has attracted widely attention due to its versatile advantages including low cost, environmentally friendly processing and easy modification. By comparison of the wide studies of the intercalation processes of kaolinite via the replacement of diverse intercalated agents, the multiple functional properties of intercalated kaolinites are ignored as well as such kind of study is very limited. In this review, we have summarized a series of intercalated compounds of kaolinites with organic molecules or organic salts by means of a simple intercalation strategy. Additionally, their multiple functional properties (such as dielectricity, ferroelectricity and ionic conductivity) will also be mentioned. Intercalation (chemistry) ; Kaolinite ; Lamella (surface anatomy) ; Materials science ; Clay minerals ; Ionic bonding ; Mineral ; Environmentally friendly ; Chemical engineering ; Mineralogy ; Chemistry ; Inorganic chemistry ; Ion ; Organic chemistry ; Composite material Clay minerals and soil interactions ; Chemical Synthesis and Characterization ; Layered Double Hydroxides Synthesis and Applications
Authors: Kiran Jose | J. G. Anjana | Venu Anand | Aswathi Nair
Source: arXiv (Cornell University) (preprint, 2023-02-16)
Field: Materials Science — Materials Chemistry

Band Gap Tuning of DC Reactively Sputtered ZnON Thin Films Zinc oxynitride (ZnO$_x$N$_y$) has recently emerged as a highly promising band gap-tunable semiconductor material for optoelectronic applications. In this study, a novel DC reactive sputtering protocol was developed to fabricate ZnO$_x$N$_y$ films with varying elemental concentrations, by precisely controlling the working pressure. The band gap was rigorously analyzed using UV-Visible spectroscopy, which was complemented by EDAX spectroscopy to determine the variations in the elemental composition. The correlation between the microstructure and band gap was investigated through the application of AFM, XRD, and Raman spectroscopy, while the Urbach theorem was used to evaluate the defect states. This study revealed the existence of intermediate structures formed during the tuning of the band gap, which can have important implications for future research aimed at developing heterostructures and 2D superlattices for photonics applications. Band gap ; Materials science ; Raman spectroscopy ; Heterojunction ; Spectroscopy ; Microstructure ; Superlattice ; Semiconductor ; Optoelectronics ; Wide-bandgap semiconductor ; Sputtering ; Direct and indirect band gaps ; Thin film ; Nanotechnology ; Optics ; Composite material ; Physics ZnO doping and properties ; Ga2O3 and related materials ; Gas Sensing Nanomaterials and Sensors
Authors: Divya Maldepalli Govindachar | Ganga Periyasamy
Source: Advanced Energy Conversion Materials (article, 2023-12-19)
Field: Materials Science — Materials Chemistry

Exploring the Interface Between Two Nanoclusters: Insights from Computational Methods Aggregation of gold nanoclusters (GNCs) with desired properties requires detailed knowledge about the inter-cluster interface and its properties. The stability of [Au6]2 dimeric cluster configuration has been confirmed based on molecular dynamic simulation at 298 K temperature, 1 atm pressure, and water as solvent. The structural and electronic properties of series of monomeric and dimeric [Au6]2, [Au6H]2, [Au6CH3]2, [Au6C2H5]2, [Au6C5H9]2, [Au6C6H11]2, [Au6C6H5]2, [Au6C6H4CH3]2, [Au6C6H4CH3]2, [Au6C2H]2, [Au6C2CH3]2 and [Au6C2C6H5]2 clusters were studied using three different functionals in density functional theoretical methods by considering three different interfaces. The dimerization was found to alter the highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap depending upon the interface between the clusters. The computation predicts that the presence of ligand-ligand (ML-LM) and ligand-metal (ML-ML) interfaces in ligated cluster dimers were found to decrease the HOMO-LUMO gap while the metal-metal (LM-ML) interface leads to larger cluster formations. The change in electronic structures is found to be the reflection of symmetry in the eigenfunctions. The vertical plane of symmetry at the ML-LM interface leads to a smaller HOMO-LUMO gap as a result of degenerate orbitals between the monomeric units. The distortion from the reflection symmetry at the ML-ML interface removes the degeneracy by splitting the orbitals which increases the HOMO-LUMO gap in the ligated clusters. Among the studied ligated nanoclusters, experimentally realized [Au6C2C6H5]2 possesses a small HOMO-LUMO gap. All the interfaces are found to behave similarly in the presence of various uniform electric fields. The consequences of HOMO-LUMO gaps were observed in redox parameters, and absorption properties and have been explained using molecular orbital plots. Nanoclusters ; Interface (matter) ; Computer science ; Computational science ; Nanotechnology ; Materials science ; Parallel computing Nanocluster Synthesis and Applications
Authors: Marina Reis de Andrade | Leonardo Cardoso de Freitas | Katielly Vianna Polkowski | Rodrigo Polkowski
Source:  (article, 2023-10-01)
Field: Materials Science — Biomaterials

CELLULOSE NANOFIBRILS - AN ANALYSIS OF THE ISOLATION METHODS The systematic review utilized the PRISMA protocol to examine various methods of obtaining nanofibrils from plant fibers, aiming for ideal values of width, length, and crystallinity. A total of 13 articles were found, of which 3 were included due to their relevance, showcasing shorter processing times and larger dimensions in the nanofibrils. The studies employed sustainable approaches, such as the use of renewable deep eutectic solvents (DES) and p-toluenesulfonic acid (p-TsOH), followed by high-pressure homogenization and centrifugation. These methods are environmentally friendly and result in high-quality nanofibrils with excellent mechanical properties, making them versatile for various applications. Exploring techniques like ball milling could be a future industrially scalable option, reducing energy consumption while maintaining nanofibril quality. Cellulose ; Isolation (microbiology) ; Computer science ; Materials science ; Polymer science ; Chemical engineering ; Engineering Advanced Cellulose Research Studies ; Electrohydrodynamics and Fluid Dynamics