jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Guangguang Guan | Xiaoqiang Li | Jiebai Li | Lin Ma | Yangtao Zhou
Source: Colloids and Surfaces A Physicochemical and Engineering Aspects (article, 2024-11-08)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Facile fabrication of cellulose-derived flawed graphite carbon with low-frequency minimum reflection loss in the C bands Fabrication ; Graphite ; Cellulose ; Carbon fibers ; Reflection (computer programming) ; Reflection loss ; Materials science ; Chemical engineering ; Optics ; Composite material ; Physics ; Computer science ; Composite number ; Engineering Electromagnetic wave absorption materials ; Graphene research and applications ; Advanced Antenna and Metasurface Technologies
Authors: Wang Ju | Benedetta Brugnoli | Federica Foglietta | Ilaria Andreana | Giovanni Longo | Simone Dinarelli | M. Girasole | Loredana Serpe | Silvia Arpicco | Iolanda Francolini | Chiara Di Meo | Pietro Matricardi
Source: International Journal of Biological Macromolecules (article, 2024-09-13)
Field: Materials Science — Biomaterials

Tuning stiffness of hyaluronan-cholesterol nanogels by mussel-inspired dopamine-Fe3+ coordination: Preparation and properties evaluation In the evolving field of nanomedicine, tailoring the mechanical properties of nanogels to fine-tune their biological performance is a compelling avenue of research. This work investigates an innovative method for modulating the stiffness of hyaluronan-cholesterol (HACH) nanogels, an area that remains challenging. By grafting dopamine (DOPA) onto the HA backbone, characterized through UV, <sup>1</sup>H NMR, and FT-IR analyses, we synthesized a novel polymer that spontaneously forms nanogels in aqueous environments. These HACH-DOPA nanogels are characterized by their small size (~170 nm), negative charge (around -32 mV), high stability, efficient drug encapsulation, and potent antioxidant activities (measured by ABTS test). Leveraging mussel-inspired metal coordination chemistry, the DOPA moieties enable stiffness modulation of the nanogels through catechol-Fe<sup>3+</sup> interactions. This modification leads to increased crosslinking and, consequently, nanogels with a significantly increased stiffness, as measured by atomic force microscopy (AFM), with the formation of the HACH-DOPA@Fe<sup>3+</sup> complex being pH-dependent and reversible. The cytocompatibility was evaluated via WST-1 cell proliferation assays on HUVEC and HDF cell lines, showing no evident cytotoxicity. Furthermore, the modified nanogels demonstrated enhanced cellular uptake, suggesting their substantial potential for intracellular drug delivery applications, a hypothesis supported by confocal microscopy assays. This work not only provides valuable insight into modulating nanogel stiffness but also advances new nanosystems for promising biomedical applications. Mussel ; Chemistry ; Dopamine ; Combinatorial chemistry ; Biochemistry ; Biophysics ; Biology ; Ecology ; Neuroscience Nanoparticle-Based Drug Delivery ; Polymer Surface Interaction Studies ; Hydrogels: synthesis, properties, applications
Authors: S. Dinakaran | K. Bhavitha | Arnis Rochma Harani | V. K. Meenakshi | Parvathy Rajendran | It Ee Lee | Mohammed Al Awadh | Lu Yuheng | N. Eswara Prasad
Source: Microchemical Journal (article, 2024-11-30)
Field: Chemistry — Analytical Chemistry

Green analytical comparison and central composite design optimization for simultaneous estimation of pain management drugs using RP-liquid chromatography • Green Analytical Chemistry Focus: The study emphasizes eco-friendly analytical methods, aligning with green chemistry principles by minimizing environmental impact, solvent usage, and waste generation. • Central Composite Design (CCD) Optimization: Uses statistical design to optimize analytical parameters, enhancing performance and reducing experimental trials. • Simultaneous Drug Estimation: A robust method for the simultaneous quantification of multiple pain management drugs, ensuring efficiency and reducing analysis time in pharmaceutical quality control. • RP-Liquid Chromatography Method: Applies Reverse Phase Liquid Chromatography (RP-LC) for precise and accurate drug estimations. • Comparative Analytical Evaluation: Compares green methodologies, showcasing the advantages of the optimized approach for drug estimation. The Central Composite Design method was utilized to validate a precise RP-HPLC method for concurrently determining the quantities of Paracetamol (PC), Diclofenac Sodium (DS), and Eperisone Hydrochloride (EH) in tablet compositions. By employing Design of Experiment (DOE), the experimental parameters were fine-tuned, resulting in an optimized eluent consisting of methanol: water (90:10) with 0.1 % orthophosphoic acid at a eluent velocity of 1 mL/min. The method exhibited exceptional purities: PC (100.83 % ± 0.85), DS (102.01 % ± 0.90), and EH (100.49 % ± 1.29). Regression equations were formulated for PC, DS, and EH as follows: y = 479762x + 151907, y = 2182788x + 2409442, and y = 777144x − 1146334, respectively. The analytical method underwent comprehensive validation, including tests for: Accuracy, Precision, Linearity and Robustness. To assess the method’s environmental impact, several Green Analytical Chemistry (GAC) tools were employed. These tools provided a multifaceted evaluation of the method’s sustainability and eco-friendliness. Composite number ; Central composite design ; Chromatography ; Pain management ; Chemistry ; Materials science ; Anesthesia ; Composite material ; Medicine ; Response surface methodology Analytical Methods in Pharmaceuticals ; Analytical Chemistry and Chromatography ; Chemistry and Chemical Engineering
Authors: Vijitha Ignatious | Navin Jacob | Neethi Raveendran | Salil Noushad | Chakkooth Vijayakumar | Biswapriya Deb
Source: IEEE Transactions on Electron Devices (article, 2024-06-27)
Field: Materials Science — Materials Chemistry

Impact of Geometrical Factors on the Effectiveness of a Flexible Organic Thermoelectric Generator The introduction of organic materials in thermoelectric (TE) technology has created significant possibilities in the field of flexible electronics. Nevertheless, achieving optimal integration of these materials into flexible TE devices necessitated a deeper comprehension and fine-tuning of device parameters. In this study, we present the enhancement of multiple variables that influence the efficiency of a flexible organic TE generator (f-OTEG) by applying dispenser printing. This method involves the deposition of an organic composite made up of a conjugated thienothiophene polymer and single-walled carbon nanotubes (SWCNTs) that exhibit excellent bonding with polyimide substrate with a peel-off strength of 490 kPa. The investigations demonstrate that the dimensional properties of the TE legs have a substantial effect on the output performances. A highly efficient 7-legged f-OTEG generated an output power of 95 nW with a temperature differential of 69.1 K. The f-OTEG exhibited no degradation for a period exceeding 200 days and maintained consistent operating stability for over 200 h. In addition, the device demonstrated exceptional performance durability during bending tests conducted over 500 cycles. Thermoelectric effect ; Thermoelectric generator ; Generator (circuit theory) ; Materials science ; Electronic engineering ; Process engineering ; Mechanical engineering ; Computer science ; Electrical engineering ; Engineering physics ; Engineering ; Physics ; Thermodynamics Advanced Thermoelectric Materials and Devices ; Thermal Radiation and Cooling Technologies ; Advanced Thermodynamics and Statistical Mechanics
Authors: Federico Traldi | Marina Resmini
Source: Biomacromolecules (article, 2024-01-19)
Field: Materials Science — Biomaterials

Impact of Protein Corona Formation on the Thermoresponsive Behavior of Acrylamide-Based Nanogels The ability to fine-tune the volume phase transition temperature (VPTT) of thermoresponsive nanoparticles is essential to their successful application in drug delivery. The rational design of these materials is limited by our understanding of the impact that nanoparticle-protein interactions have on their thermoresponsive behavior. In this work, we demonstrate how the formation of protein corona impacts the transition temperature values of acrylamide-based nanogels and their reversibility characteristics, in the presence of lysozyme, given its relevance for the ocular and intranasal administration route. Nanogels were synthesized with <i>N</i>-isopropylacrylamide or <i>N</i>-<i>n</i>-propylacrylamide as backbone monomers, methylenebis(acrylamide) (2.5-20 molar %) as a cross-linker, and functionalized with negatively charged monomers 2-acrylamido-2-methylpropanesulfonic acid, <i>N</i>-acryloyl-l-proline, or acrylic acid; characterization showed comparable particle diameter (<i>c.a</i>.10 nm), but formulation-dependent thermoresponsive properties, in the range 28-54 °C. Lysozyme was shown to form a complex with the negatively charged nanogels, lowering their VPTT values; the hydrophilic nature of the charged comonomer controlled the drop in VPTT upon complex formation, while matrix rigidity only had a small, yet significant effect. The cross-linker content was found to play a major role in determining the reversibility of the temperature-dependent transition of the complexes, with only 20 molar % cross-linked-nanogels displaying a fully reversible transition. These results demonstrate the importance of evaluating protein corona formation in the development of drug delivery systems based on thermoresponsive nanoparticles. Comonomer ; Acrylamide ; Monomer ; Chemistry ; Drug delivery ; Polymer chemistry ; Nanoparticle ; Lower critical solution temperature ; Nanogel ; Chemical engineering ; Materials science ; Polymer ; Nanotechnology ; Copolymer ; Organic chemistry Nanoparticle-Based Drug Delivery ; Surfactants and Colloidal Systems ; Protein Interaction Studies and Fluorescence Analysis
Authors: Yu Cheng | Jian Wu | Yunxin Cui | Jingying Zhai | Minghui Wu | Xiaojiang Xie
Source: Analytical Chemistry (article, 2024-03-08)
Field: Materials Science — Materials Chemistry

Photoswitchable Temperature Nanosensors Based on the Chemical Kinetics of Photochromic Naphthopyran for Live Cell Imaging Microscopic temperature imaging holds significant importance in various fields, particularly in the development of nanomaterials for photothermal therapy (PTT). In this study, we present an analytical method to probe cellular temperature based on chemical kinetics and additional luminescence quenching by photoswitchable naphthopyrans. Taking advantage of the rapid ring-closing reaction of naphthopyran, temperature sensing was realized with a linear relationship between the logarithmic decay time constant (ln τ) and the reciprocal temperature (<i>T</i><sup>-1</sup>). To create luminescent temperature nanosensors, we harnessed the ability of ring-opened naphthopyran to quench the luminescence of a semiconducting polymer, resulting in a diverse array of probes. Structural modifications on the naphthopyran also provided a way to fine-tune the sensitivity and response window of the nanosensors. The method allowed cellular temperature imaging on a cost-effective fluorescence microscopic setup. As an application, the temperature increase induced by gold nanorods (AuNRs) in cell lysosomes was successfully monitored, laying the foundation for a new class of photoswitchable nanosensors with promising biological applications. Nanosensor ; Photothermal therapy ; Chemistry ; Luminescence ; Nanorod ; Nanotechnology ; Nanomaterials ; Fluorescence ; Photochromism ; Kinetics ; Quenching (fluorescence) ; Photothermal effect ; Fluorescence-lifetime imaging microscopy ; Photochemistry ; Optoelectronics ; Materials science ; Optics Photochromic and Fluorescence Chemistry ; Nanoplatforms for cancer theranostics ; Gold and Silver Nanoparticles Synthesis and Applications
Authors: M. Shalini | S. Nanthini | Pandiyarasan Veluswamy | Janith Weerasinghe | Igor Levchenko | Katia Alexander | Karthika Prasad | H. Shankar | Suhasini Sathiyamoothy
Source: Scientific Reports (article, 2024-11-08)
Field: Materials Science — Materials Chemistry

Facet dependent ultralow thermal conductivity of zinc oxide coated silver fabric for thermoelectric devices The conversion efficiency of a thermoelectric power generator depends on the dimensionless figure-of-merit (ZT) of the constituent thermoelectric materials, which is mainly determined by their Seebeck coefficient as well as the electrical and thermal conductivity. ZnO holds promise for thermoelectric applications, yet its use is currently limited by low electrical conductivity and high thermal conductivity. Herein, we demonstrate how thermal conductivity of ZnO can be significantly reduced by intelligently combining it with a cellulose-based Ag fabric using a one-step hydrothermal method, and how different ratios of zinc nitrate hexahydrate (ZNH) to hexamethylenetetramine (HMT) can be used to fine-tune the thermoelectric performance of the resulting composite. We show that as-prepared samples have a composite structure of Ag, Zn and O without any other impurity phases. We propose that the facet dependent crystal growth orientation, from the c-axis in (101) planes to the a-axis in (100) plane, amplify phonon scattering within the material, impeding effective heat transfer and thereby lowering overall thermal conductivity to 0.046 W/mK at room temperature for composites with a 1:1 ZNH to HMT ratio. Materials science ; Thermal conductivity ; Seebeck coefficient ; Thermoelectric effect ; Thermoelectric materials ; Thermoelectric generator ; Composite material ; Facet (psychology) Advanced Thermoelectric Materials and Devices ; Thermal properties of materials ; Thermal Radiation and Cooling Technologies
Authors: Sari Ishikawa | Hajime Maeda | Masahito Segi | Taniyuki Furuyama
Source: Chemistry - A European Journal (article, 2024-03-16)
Field: Materials Science — Materials Chemistry

Dehydro[12]‐ and [18]annulene‐Fused Ball‐Shaped Ruthenium Complex Oligomers: Synthesis, Aromatic/Antiaromatic Effect, and Symmetry for Near‐Infrared Optical Properties The appropriate arrangement of near-infrared (NIR) chromophores allows for the modification of the peak wavelength in the NIR region and efficient use of NIR light. However, the preparation of novel NIR chromophores using simple procedures remains a formidable challenge. Herein, we report the synthesis of ball-shaped ruthenium complex oligomers. The metal complexes can be synthesized in a single step and interact strongly with NIR light. Alkyne-substituted low-symmetry ball-shaped ruthenium complexes were synthesized and subjected to Eglinton coupling to obtain dehydro[12] and [18]annulene-fused dimers and trimers. Fine-tuning of the reaction conditions led to the selective synthesis of the target oligomers. NMR spectroscopy confirmed that the 18π-aromatic and 12π-antiaromatic properties of the annulene influenced the ruthenium complex chromophore, and magnetic circular dichroism spectroscopy showed changes in the electronic structure of their excited state owing to molecular-symmetry differences. The absorption coefficient in the NIR region of the absorption spectra of the oligomers increased significantly, supporting the efficient use of light by oligomerization. The formation of oligomers using ball-shaped metal complexes is a simple and effective strategy for controlling NIR optical properties. Chromophore ; Ruthenium ; Antiaromaticity ; Annulene ; Photochemistry ; Chemistry ; Alkyne ; Spectroscopy ; Absorption spectroscopy ; Molecule ; Aromaticity ; Computational chemistry ; Organic chemistry ; Catalysis Luminescence and Fluorescent Materials ; Synthesis and Properties of Aromatic Compounds ; Photochromic and Fluorescence Chemistry
Authors: Fernanda Rosa Vieira | S. Soreto Teixeira | Denis Alikin | L. C. Costa | Nuno Gama | Ana Barros‐Timmons | Andréi L. Kholkin | Dmitry V. Evtuguin | Paula Pinto
Source: Materials Today Sustainability (article, 2024-10-02)
Field: Materials Science — Polymers and Plastics

A semi-conductive rigid polyurethane foam derived from kraft lignin polyol and a PEDOT: PSS coating Polyurethane ; PEDOT:PSS ; Polyol ; Coating ; Materials science ; Electrical conductor ; Composite material ; Polymer science ; Polymer ; Polymer chemistry Polymer composites and self-healing ; Conducting polymers and applications ; Lignin and Wood Chemistry
Authors: Darien K. Nguyen | Fabio Cameli | Panagiotis Dimitrakellis | Dionisios G. Vlachos
Source: Industrial & Engineering Chemistry Research (article, 2024-05-14)
Field: Materials Science — Materials Chemistry

Biphasic Plasma Microreactor for Oxyfunctionalization of Liquid Hydrocarbons Oxyfunctionalization of linear alkanes is important but challenging to achieve. Herein, we demonstrate a biphasic gas–liquid modular plasma microreactor utilizing Ar/O2 gas to selectively oxidize liquid n-dodecane (C12) in an electrified, catalyst-free fashion. C12 secondary alcohols and ketones are the major products, with selectivities of 45–60% and a maximum yield of 23%. Fine-tuning gas and liquid flow rates enhance the plasma–liquid interfacial area, leading to a conversion of >50%. Difunctional and oligomerized oxygenates, alongside lighter hydrocarbons stemming from carbon–carbon cleavage, form at higher conversions. The energy efficiency (0.189 μmol/J) of the modular microreactor is the highest reported among plasma systems. Alkane conversion can be further improved by increasing the length of the plasma region while maintaining excellent energy efficiencies. Similarly, sequential processing/recirculation can enhance the extent of the reaction. This system is also amenable to treating mixtures of liquid n-alkanes, where smaller hydrocarbons are oxidized preferentially to a certain extent. The vapor pressure and liquid temperature are the key parameters. The chemistry occurs primarily in the gas phase for the lighter hydrocarbons and switches to interfacial reactions for the larger ones. Microreactor ; Plasma ; Chemistry ; Hydrocarbon ; Liquid liquid ; Chromatography ; Organic chemistry ; Chemical engineering ; Photochemistry ; Catalysis ; Nuclear physics Catalytic Processes in Materials Science ; Plasma Applications and Diagnostics ; Electrohydrodynamics and Fluid Dynamics
Authors: Tristan Lawrie | Timothy A. Starkey | Gregor Tanner | D. B. Moore | P. Savage | G. J. Chaplain
Source: Physical Review Materials (article, 2024-10-25)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Application of quantum graph theory to metamaterial design: Negative refraction of acoustic waveguide modes We leverage quantum graph theory to quickly and accurately characterize acoustic metamaterials comprising networks of interconnected pipes. Anisotropic bond lengths are incorporated in the model that correspond to space-coiled acoustic structures to exhibit dispersion spectra reminiscent of hyperbolic metamaterials. We construct two metasurfaces with embedded graph structure and, motivated by the graph theory, infer and fine-tune their dispersive properties to engineer nonresonant negative refraction of acoustic surface waves at their interface. Agreement between the graph model, full-wave simulations, and experiments bolsters quantum graph theory as a new paradigm for metamaterial design. Published by the American Physical Society 2024 Materials science ; Metamaterial ; Negative refraction ; Quantum ; Optics ; Optoelectronics ; Quantum mechanics ; Physics Metamaterials and Metasurfaces Applications ; Acoustic Wave Phenomena Research ; Antenna Design and Analysis
Authors: Peilong Li | Jieying Li | Jacob Levin | Arkaye Kierulf | James Smoot | Amin Zarei | Alireza Abbaspourrad
Source: Advanced Functional Materials (article, 2024-04-01)
Field: Materials Science — Materials Chemistry

Crafting Tunable Hollow Particles Using Antisolvent‐Driven Interlocking of Micron‐Sized Building Blocks Abstract The contribution of a hollow structure on the rheological behavior of granular suspensions remains un‐investigated due to the challenge of water impermeability. Here starch is used to fabricate water‐permeable hollow particles, as a model for granular suspensions and investigated the resulting microstructures and rheological behavior. The hollow structure is fabricated based on a bottom‐up method by assembling micron‐sized building blocks into a superstructure. A Pickering emulsion is heated to fuse the starch interface, then, upon antisolvent precipitation, the polymer strands interlock to form a rigid shell around the oil template. When the template is removed a hollow particle remained. These particles exhibited a specific volume &gt;5‐times higher than unmodified starch and consequently a higher viscosity. Larger particles showed higher viscosity but are also more fragile. The template structure can be manipulated to fine‐tune their functionality. These micro‐sized building blocks made from edible materials can be used as the next generation of texturizers. Additionally, these water‐permeable colloidosomes present an innovative approach to understanding how micro‐architectures impact the rheological behavior of granular suspensions. Materials science ; Rheology ; Interlocking ; Viscosity ; Pickering emulsion ; Particle (ecology) ; Polymer ; Emulsion ; Interlock ; Composite material ; Chemical engineering ; Nanotechnology ; Nanoparticle ; Mechanical engineering Pickering emulsions and particle stabilization ; Proteins in Food Systems ; Advanced Materials and Mechanics
Authors: Anni Seisto | Anna S. Borisova | Robert Pylkkänen | Pezhman Mohammadi
Source: Computational and Structural Biotechnology Journal (article, 2024-09-17)
Field: Materials Science — Biomaterials

Tailoring hydrophobicity and strength in spider silk-inspired coatings via thermal treatments The advent of advanced coatings has transformed material functionalities, extending their roles from basic coverage and visual appeal to include unique properties such as self-healing, superior hydrophobicity, and antimicrobial action. However, the traditional dependency on petrochemical-derived materials for these coatings raises environmental concerns. This study proposes the use of renewable and alternative materials for coating development. We present the use of bioengineered spider silk-inspired protein (SSIP), produced through recombinant technology, as a viable, eco-friendly alternative due to their ease of processing under ambient pressure and the utilization of water as a solvent, alongside their exceptional physicochemical properties. Our research investigates the effects of different thermal treatments and protein concentrations on the mechanical strength and surface water repellency of coatings on silica bases. Our findings reveal a direct correlation between the temperature of heat treatment and the enhancements in surface hydrophobicity and mechanical strength, where elevated temperatures facilitate increased resistance to water and improved mechanical integrity. Consequently, we advocate SSIPs present a promising, sustainable choice for advanced coatings, providing a pathway to fine-tune coating recipes for better mechanical and hydrophobic properties with a reduced ecological footprint, finding potential uses in various fields such as electronics. SILK ; Spider ; Spider silk ; Materials science ; Thermal ; Polymer science ; Composite material ; Nanotechnology ; Biology ; Ecology ; Physics Silk-based biomaterials and applications ; Surface Modification and Superhydrophobicity ; Marine Biology and Environmental Chemistry