jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Man Yang | Santosh Kumar Parupelli | Zhigang Xu | Salil Desai
Source: Materials (article, 2024-06-10)
Field: Materials Science — Materials Chemistry

Three-Dimensional-Printed Composite Structures: The Effect of LSCF Slurry Solid Loading, Binder, and Direct-Write Process Parameters In this research, a direct-write 3D-printing method was utilized for the fabrication of inter-digitized solid oxide fuel cells (SOFCs) using ceramic materials. The cathode electrode was fabricated using the LSCF (La<sub>0.6</sub>Sr<sub>0.2</sub>Fe<sub>0.8</sub>Co<sub>0.2</sub>O<sub>3-δ</sub>) slurry loading and the Polyvinyl butyral (PVB) binder. The rheological parameters of slurries with varying LSCF slurry loading and PVB binder concentration were evaluated to determine their effect on the cathode trace performance in terms of microstructure, size, and resistance. Additionally, the dimensional shrinkage of LSCF lines after sintering was investigated to realize their influence on cathode line width and height. Moreover, the effect of the direct-write process parameters such as pressure, distance between the nozzle and substrate, and speed on the cathode line dimensions and resistance was evaluated. LSCF slurry with 50% solid loading, 12% binder, and 0.2% dispersant concentration was determined to be the optimal value for the fabrication of SOFCs using the direct-write method. The direct-write process parameters, in addition to the binder and LSCF slurry concentration ratios, had a considerable impact on the microstructure of cathode lines. Based on ANOVA findings, pressure and distance had significant effects on the cathode electrode resistance. An increase in the distance between the nozzle and substrate, speed, or extrusion pressure of the direct writing process increased the resistance of the cathode lines. These findings add to the ongoing effort to refine SOFC fabrication techniques, opening the avenues for advanced performance and efficiency of SOFCs in energy applications. Materials science ; Microstructure ; Cathode ; Slurry ; Composite material ; Dispersant ; Nozzle ; Fabrication ; Ceramic ; Sintering ; Extrusion ; Solid oxide fuel cell ; Electrolyte ; Electrode ; Dispersion (optics) ; Mechanical engineering Advancements in Solid Oxide Fuel Cells ; Electronic and Structural Properties of Oxides ; Nuclear materials and radiation effects
Authors: Caitlin D. Coplan | Nicolas E. Watkins | Xiao‐Min Lin | Richard D. Schaller
Source: Nanoscale Advances (article, 2024-01-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Scalable and adaptable two-ligand co-solvent transfer methodology for gold bipyramids to organic solvents Large and faceted nanoparticles, such as gold bipyramids, presently require synthesis using alkyl ammonium halide ligands in aqueous conditions to stabilize the structure, which impedes subsequent transfer and suspension of such nanoparticles in low polarity solvents despite success with few nanometer gold nanoparticles of shapes such as spheres. Phase transfer methodologies present a feasible avenue to maintain colloidal stability of suspensions and move high surface energy particles into organic solvent environments. Here, we present a method to yield stable suspensions of gold bipyramids in low-polarity solvents, including methanol, dimethylformamide, chloroform, and toluene, through the requisite combination of two capping agents and the presence of a co-solvent. By utilizing PEG-SH functionalization for stability, dodecanethiol (DDT) as the organic-soluble capping agent, and methanol to aid in the phase transfer, gold bipyramids with a wide-range of aspect ratios and sizes can be transferred between water and chloroform readily and maintain colloidal stability. Subsequent transfer to various organic and low-polarity solvents is then demonstrated for the first time. Colloidal gold ; Solvent ; Nanoparticle ; Chemical engineering ; Chloroform ; Dimethylformamide ; Toluene ; Halide ; Materials science ; Colloid ; Phase (matter) ; Oleylamine ; Surface modification ; Chemistry ; Nanotechnology ; Inorganic chemistry ; Organic chemistry Gold and Silver Nanoparticles Synthesis and Applications ; Molecular Junctions and Nanostructures ; Advanced biosensing and bioanalysis techniques
Authors: Minzheng Yang | Mufeng Zhang | Baoding Li | Hanzheng Xing | Nannan Sun | Yao Xiao | Weibin Ren | Xiaoyan Li | Yang Shen
Source: Nano Research (article, 2024-06-01)
Field: Materials Science — Materials Chemistry

Size effect of fillers on breakdown resistance and energy storage performances in dilute polymer-inorganic nanocomposites There is an urgent demand for polymer dielectrics in the rapidly growing fields of electric vehicles and energy exploration. However, the existing polymer dielectrics suffer from poor energy density due to the decrease of breakdown strength at elevated temperatures, which limits their widespread application. Ultralow content inorganic fillers (&lt; 1 vol%) with appropriate size have been reported to enhance the polarization of polymer matrix, while their influence on breakdown still lack attention. In this work, we developed the dilute PEI-Al<sub>2</sub>O<sub>3</sub> nanocomposites with different filler size (5 nm, 20 nm, and 80 nm) and studied the size effect of nanofillers on the breakdown resistance and energy storage performances of nanocomposite dielectrics. Based on the results of multiscale simulations and tests, the dilute fillers with smaller size (5 nm) exhibit more remarkable enhancement on charge trapping and mechanical strengthening of polymer matrix, and thus yielding higher breakdown strength and a discharged energy density of 4.69 J cm<sup>-3</sup> (150 °C) and 2.56 J cm<sup>-3</sup> (200 °C) with a high efficiency of 90%. A long charge-discharge cycling stability up to 10<sup>5</sup> cycles was also achieved at 150 °C. Nanocomposite ; Materials science ; Polymer ; Composite material ; Energy storage ; Polymer nanocomposite ; Chemical engineering High voltage insulation and dielectric phenomena ; Dielectric materials and actuators ; Advanced Cellulose Research Studies
Authors: Juan Li | Hao Li | Kaikai Wang | Haiyan Chou
Source: Regenerative Therapy (article, 2024-06-01)
Field: Materials Science — Biomaterials

Evaluation of decellularized caprine small intestine submucosa encapsulated with nano-formulations of cerium oxide and curcumin in the management of burn wound The management of burn injuries presents a significant challenge in clinical settings, yet an optimal solution remains elusive. Therefore, this study aimed to develop a topical therapeutic formulation to address the complex issues hindering burn wound healing. Emphasizing the sustained presence of bioactive principles, we synthesized a bioactive gel derived from decellularized caprine small intestine submucosa (D-CIS) and encapsulated it with nano-formulations of cerium oxide and curcumin to create a burn wound dressing material with enhanced properties. The choice of encapsulated components was guided by their antimicrobial, antioxidant, and immune-modulating characteristics, along with their inherent ability to gradually release bioactive substances. The encapsulated (cerium oxide and curcumin) D-CIS bioactive gel demonstrated a range of properties, including antimicrobial, antioxidant, and anti-inflammatory effects, along with sustained release kinetics of bioactive molecules. These combined effects facilitated accelerated burn wound healing by mitigating oxidative stress, reducing inflammation, and promoting cell recruitment for epithelial and vascular regeneration. This study contributes to the development of a novel bioactive gel incorporating cerium oxide and curcumin, offering a promising approach to enhance burn wound healing. Curcumin ; Decellularization ; Nano- ; Cerium oxide ; Submucosa ; Cerium ; Materials science ; Nanotechnology ; Biomedical engineering ; Pharmacology ; Medicine ; Oxide ; Surgery ; Metallurgy ; Composite material ; Scaffold Electrospun Nanofibers in Biomedical Applications ; Tissue Engineering and Regenerative Medicine ; Curcumin's Biomedical Applications
Authors: Guillermo J. Amador | Brett Klaassen van Oorschot | Caiying Liao | Jianing Wu | Da Wei
Source: Beilstein Journal of Nanotechnology (article, 2024-06-06)
Field: Materials Science — Surfaces, Coatings and Films

Functional fibrillar interfaces: Biological hair as inspiration across scales Hair, or hair-like fibrillar structures, are ubiquitous in biology, from fur on the bodies of mammals, over trichomes of plants, to the mastigonemes on the flagella of single-celled organisms. While these long and slender protuberances are passive, they are multifunctional and help to mediate interactions with the environment. They provide thermal insulation, sensory information, reversible adhesion, and surface modulation (e.g., superhydrophobicity). This review will present various functions that biological hairs have been discovered to carry out, with the hairs spanning across six orders of magnitude in size, from the millimeter-thick fur of mammals down to the nanometer-thick fibrillar ultrastructures on bateriophages. The hairs are categorized according to their functions, including protection (e.g., thermal regulation and defense), locomotion, feeding, and sensing. By understanding the versatile functions of biological hairs, bio-inspired solutions may be developed across length scales. Nanotechnology ; Trichome ; Adhesion ; Biology ; Biophysics ; Materials science ; Ecology ; Composite material Surface Modification and Superhydrophobicity ; Advanced Sensor and Energy Harvesting Materials ; Adhesion, Friction, and Surface Interactions
Authors: S. Neumann | David Rafaja
Source: Powders (article, 2024-10-31)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Correlative Multi-Scale Characterization of Nanoparticles Using Transmission Electron Microscopy Chemical and physical properties of nanoparticles (NPs) are strongly influenced not only by the crystal structure of the respective material, including crystal structure defects but also by the NP size and shape. Contemporary transmission electron microscopy (TEM) can describe all these NP characteristics, however typically with a different statistical relevance. While the size and shape of NPs are frequently determined on a large ensemble of NPs and thus with good statistics, the characteristics on the atomic scale are usually quantified for a small number of individual NPs and thus with low statistical relevance. In this contribution, we present a TEM-based characterization technique, which can determine relevant characteristics of NPs in a scale-bridging way—from the crystal structure and crystal structure defects up to the NP size and morphology—with sufficient statistical relevance. This technique is based on a correlative multi-scale TEM approach that combines information on atomic scale obtained from the high-resolution imaging with the results of the low-resolution imaging assisted by a semi-automatic segmentation routine. The capability of the technique is illustrated in several examples, including Au NPs with different shapes, Au nanorods with different facet configurations, and multi-core iron oxide nanoparticles with a hierarchical structure. Correlative ; Characterization (materials science) ; Transmission electron microscopy ; Electron microscope ; Materials science ; Nanoparticle ; Nanotechnology ; Electron tomography ; Scale (ratio) ; Scanning transmission electron microscopy ; Physics ; Optics ; Geography ; Cartography Gold and Silver Nanoparticles Synthesis and Applications ; nanoparticles nucleation surface interactions ; Electron and X-Ray Spectroscopy Techniques
Authors: Dominik Scholtes | Ralf‐Kilian Zäh | Benedikt Faupel | Stefan Seelecke | Paul Motzki
Source: Actuators (article, 2024-10-05)
Field: Materials Science — Materials Chemistry

Dissimilar Resistance Welding of NiTi Microwires for High-Performance SMA Bundle Actuators Shape memory alloys (SMAs) are becoming a more important factor in actuation technology. Due to their unique features, they have the potential to save weight and installation space as well as reduce energy consumption. The system integration of the generally small-diameter NiTi wires is an important cornerstone for the emerging technology. Crimping, a common method for the mechanical and electrical connection of SMA wires, has several drawbacks when it comes to miniaturization and high-force outputs. For high-force applications, for example, multiple SMA wires in parallel are needed to keep actuation frequencies high while scaling up the actuation force. To meet these challenges, the proposed study deals with the development of a resistance-welding process for manufacturing NiTi wire bundles. The wires are welded to a sheet metal substrate, resulting in promising functional properties and high joint strengths. The welding process benefits from low costs, easy-to-control parameters and good automation potential. A method for evaluating the resistance-welding process parameters is presented. With these parameters in place, a manufacturing process for bundled wire actuators is discussed and implemented. The welded joints are examined by peel tests, microscopy and fatigue experiments. The performance of the manufactured bundle actuators is demonstrated by comparison to a single wire with the same accumulated cross-sectional area. SMA* ; Nickel titanium ; Materials science ; Welding ; Actuator ; Bundle ; Shape-memory alloy ; Composite material ; Structural engineering ; Computer science ; Engineering ; Electrical engineering Shape Memory Alloy Transformations ; Ferroelectric and Piezoelectric Materials ; Titanium Alloys Microstructure and Properties
Authors: Trenton M. Peters-Clarke | Yiran Liang | Keaton L. Mertz | Kenneth W. Lee | Michael S. Westphall | Joshua D. Hinkle | Graeme C. McAlister | John E. P. Syka | Ryan Kelly | Joshua J. Coon
Source: bioRxiv (Cold Spring Harbor Laboratory) (preprint, 2024-02-25)
Field: Chemistry — Spectroscopy

Boosting the Sensitivity of Quantitative Single-Cell Proteomics with Activated lon-Tandem Mass Tags (AI-TMT) ABSTRACT Single-cell proteomics is a powerful approach to precisely profile protein landscapes within individual cells toward a comprehensive understanding of proteomic functions and tissue and cellular states. The inherent challenges associated with limited starting material in single-cell analyses demands heightened analytical sensitivity. Just as advances in sample preparation maximize the amount of material that makes it from the cell to the mass spectrometer, we strive to maximize the number of ions that make it from ion source to the detector. In isobaric tagging experiments, limited reporter ion generation limits quantitative accuracy and precision. The combination of infrared photoactivation and ion parking circumvents the m/z dependence inherent in HCD, maximizing reporter generation and avoiding unintended degradation of TMT reporter molecules in a method we term activated ion-tandem mass tags (AI-TMT). The method was applied to single-cell human proteomes using 18-plex TMTpro, resulting in a 4-5-fold increase in reporter ion signal on average compared to conventional SPS-MS 3 approaches. AI-TMT enables faster duty cycles, higher throughput, and increased peptide identification and quantification. Comparative experiments showcase 4-5-fold lower injection times for AI-TMT, providing superior sensitivity without compromising accuracy. In all, AI-TMT enhances the sensitivity and dynamic range of proteomic experiments and is compatible with other techniques, including gas-phase fractionation and real-time searching, promising increased gains in the study of cellular heterogeneity and disease mechanisms. Tandem mass tag ; Quantitative proteomics ; Chemistry ; Proteome ; Mass spectrometry ; Tandem mass spectrometry ; Proteomics ; Computational biology ; Isobaric labeling ; Biological system ; Biophysics ; Computer science ; Chromatography ; Biology ; Biochemistry ; Protein mass spectrometry Advanced Proteomics Techniques and Applications ; Mass Spectrometry Techniques and Applications ; Biosensors and Analytical Detection
Authors: Adriano Carniel | Nathália Ferreira dos Santos | Filipe Smith Buarque | Absai da Conceição Gomes | Luiz S. Chinelatto | Luiz Alexandre Sacorague | Maria Alice Zarur Coelho | Aline Machado de Castro
Source: Fermentation (article, 2024-04-30)
Field: Materials Science — Biomaterials

Biodepolymerization of Polyamide Fibers Using Yarrowia lipolytica as Whole-Cell Biocatalyst Polyamide is a thermoplastic polymer widely used for several applications, including cables in offshore oil and gas operations. Due to its growing annual production worldwide, this poorly biodegradable material has been a source of pollution. Given this scenario, the need has arisen to develop environmentally friendly techniques to degrade this waste, and biotechnology has emerged as a possible solution to mitigate this problem. This study aimed to investigate the potential of Yarrowia lipolytica to biodepolymerize polyamide fibers (PAF). Microbial cultures were grown in shaken flasks containing different concentrations of PAF (0.5 and 2 g·L−1) and in a bioreactor with and without pH adjustment. PAF mass loss was up to 16.8%, achieved after 96 h of cultivation in a bioreactor without pH adjustment. Additionally, NMR analyses revealed that the amorphous regions of PAF, which are more susceptible to depolymerization, were reduced by 6% during cultivation. These preliminary results indicate the biotechnological potential of Y. lipolytica to depolymerize PAF. Yarrowia ; Biocatalysis ; Polyamide ; Chemistry ; Biotechnology ; Yeast ; Biology ; Biochemistry ; Catalysis ; Organic chemistry biodegradable polymer synthesis and properties ; Microplastics and Plastic Pollution
Authors: Manuel Ceballos | Giulia Zampini | Oleg Semyonov | Samuel Funes‐Hernando | José Manuel Vila‐Fungueiriño | Sonia Martínez‐Giménez | Sergio Tatay | Carlos Martí‐Gastaldo | Thomas Devic | Beatriz Pelaz | Pablo del Pino
Source: Cell Reports Physical Science (article, 2024-12-01)
Field: Chemistry — Inorganic Chemistry

Ultrafast synthesis of zirconium-porphyrin framework nanocrystals from alkoxide precursors Porphyrinic metal-organic frameworks (MOFs) offer high surface areas and tunable catalytic and optoelectronic properties, making them versatile candidates for applications in phototherapy, drug delivery, photocatalysis, electronics, and energy storage. However, a key challenge for industrial integration is the rapid, cost-effective production of suitable sizes. This study introduces Zr(IV) alkoxides as metal precursors, achieving ultrafast (∼minutes) and high-yield (>90%) synthesis of three well-known Zr-based porphyrinic MOF nanocrystals: MOF-525, PCN-224, and PCN-222, each with distinct topologies. By adjusting linker-to-metal and modulator-to-metal ratios, we attain precise control over single-phase formation. Demonstrating alkoxides' potential, we synthesized nanosized PCN-224 at room temperature within seconds using a continuous multifluidic method. This advancement greatly simplifies porphyrinic MOF production, enabling broader industrial and scientific applications. Alkoxide ; Porphyrin ; Zirconium ; Nanocrystal ; Ultrashort pulse ; Materials science ; Nanotechnology ; Inorganic chemistry ; Photochemistry ; Chemistry ; Organic chemistry ; Metallurgy ; Catalysis ; Optics ; Physics ; Laser Metal-Organic Frameworks: Synthesis and Applications ; Polyoxometalates: Synthesis and Applications ; Porphyrin and Phthalocyanine Chemistry
Authors: Aleksandar Radić | Nick von Jeinsen | Víctor Pérez | Ke Wang | Lin, Min | Liu, Boyao | Yiru Zhu | Ismail Sami | Watanabe, Kenji | Taniguchi, Takashi | David J. Ward | A. P. Jardine | Rao, Akshay | Manish Chhowalla | Sam Lambrick
Source: arXiv (Cornell University) (preprint, 2024-09-27)
Field: Materials Science — Materials Chemistry

Measuring vacancy-type defect density in monolayer semiconductors Two-dimensional (2D) materials have attracted wide-spread interest due to their unique and tunable properties. Their optoelectronic, mechanical, and thermal properties are greatly influenced by crystal defects, which are, in turn, used to control these properties. However, experimental quantification of the density of defects, whether deliberately introduced or inherent, is very difficult in these atomically thin materials. Here we show that helium atom micro-diffraction can be used to measure the defect density in 15x20um monolayer MoS2, a prototypical 2D semiconductor, quickly and easily compared to standard methods. We present a simple analytic model, the lattice gas equation, that fully captures the relationship between atomic Bragg diffraction intensity and defect density. The model, combined with ab initio scattering calculations, shows that our technique can immediately be applied to a wide range of 2D materials, independent of sample chemistry or structure. Additionally, wafer-scale characterization is immediately possible. Monolayer ; Diffraction ; Helium ; Materials science ; Helium atom ; Atom (system on chip) ; Atomic physics ; Nanotechnology ; Optics ; Physics ; Computer science 2D Materials and Applications ; Metal and Thin Film Mechanics ; Machine Learning in Materials Science
Authors: Gurunath Apte | Marcus Soter | Dikshita Madkatte | Doris Heinrich | Thi‐Huong Nguyen
Source: Advanced Functional Materials (article, 2024-11-08)
Field: Materials Science — Surfaces, Coatings and Films

Agarose Micro/Nanostructured Surfaces: A Step Toward an Innovative Solution for Platelet Storage Bags Abstract In addressing the critical limitations associated with platelet storage, the study investigates an innovative solution aimed at preventing the unwanted activation of platelets within storage bags. This activation is a key factor that currently restricts the shelf life of platelet products to only 72 h, leading to extreme waste production and high costs. Here, highly effective surfaces are identified for minimizing surface‐induced platelet activation. Using thermal nanoimprint lithography (T‐NIL), a new method is demonstrated for patterning reproducible agarose micro/nanostructures (a natural hydrogel with anti‐platelet adhesive properties) including dots, chains, pills, and squares. The agarose (3%) structured surfaces displayed outstanding flexibility and hydrophilic behavior that prevented platelet adhesion as confirmed by confocal microscopy. Importantly, pill‐shaped structures effectively maintained their ability to prevent platelet adhesion, even after a long cell‐contacting duration. Atomic force microscopy indicated that the effectiveness of dampening platelet adherence is determined by the shape, size, height, and aspect ratio of the structures. A model is provided to explain how the different shapes affect wettability and thereby hinder platelet adherence. The developed anti‐adhesive agarose structured surfaces show promise to revolutionize platelet storage, provide vital insights into biomaterials research, and demonstrate the potential of tailored agarose surfaces in biomedical applications. Materials science ; Agarose ; Nanotechnology ; Adhesion ; Platelet activation ; Platelet adhesiveness ; Platelet ; Confocal microscopy ; Biomedical engineering ; Chemical engineering ; Composite material ; Platelet aggregation ; Chromatography ; Chemistry Polymer Surface Interaction Studies ; Blood transfusion and management ; Advanced Drug Delivery Systems