jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: J.J. Torrez-Herrera | S.A. Korili | A. Gil
Source: Catalysis Reviews (article, 2020-11-16)
Field: Materials Science — Materials Chemistry

Progress in the synthesis and applications of hexaaluminate-based catalysts The development of materials that can exhibit thermal resistance at very high temperatures, thus allowing them to be applied as catalysts and thermal insulators, amongst other possible uses, is a research subject of great interest. This is the case for hexaaluminates, a class of hexagonal aluminate compounds with a unique structure that are stable at very high temperatures up to 1600°C and exhibit exceptional resistance to sintering and thermal shock, thus making them attractive catalysts for high-temperature applications. In this review, the structure of hexaaluminates is presented first. The most recent advances in synthetic methods (sol-gel, reverse microemulsion, hydrothermal synthesis, carbon-templating, solution combustion synthesis, and freeze-drying methods) are discussed subsequently, with the aim of maximizing textural properties and including in their structure metals known to be active in catalytic applications, such as combustion of CH4, partial oxidation, and dry reforming of CH4 to produce synthetic gas, and the decomposition of N2O. Finally, other applications, such as their function as a thermal barrier, are also addressed. Materials science ; Catalysis ; Sintering ; Chemical engineering ; Thermal decomposition ; Syngas ; Catalytic combustion ; Nanotechnology ; Combustion ; Carbon fibers ; Thermal shock ; Hydrothermal circulation ; Chemistry ; Metallurgy ; Composite material ; Organic chemistry ; Composite number Catalytic Processes in Materials Science ; Catalysis and Oxidation Reactions ; Catalysts for Methane Reforming
Authors: Nikolaus S. Leitner | Martina Schroffenegger | Erik Reimhult
Source: ACS Applied Bio Materials (article, 2020-12-29)
Field: Materials Science — Biomaterials

Polymer Brush-Grafted Nanoparticles Preferentially Interact with Opsonins and Albumin Nanoparticles find increasing applications in life science and biomedicine. The fate of nanoparticles in a biological system is determined by their protein corona, as remodeling of their surface properties through protein adsorption triggers specific recognition such as cell uptake and immune system clearance and nonspecific processes such as aggregation and precipitation. The corona is a result of nanoparticle-protein and protein-protein interactions and is influenced by particle design. The state-of-the-art design of biomedical nanoparticles is the core-shell structure exemplified by superparamagnetic iron oxide nanoparticles (SPIONs) grafted with dense, well-hydrated polymer shells used for biomedical magnetic imaging and therapy. Densely grafted polymer chains form a polymer brush, yielding a highly repulsive barrier to the formation of a protein corona <i>via</i> nonspecific particle-protein interactions. However, recent studies showed that the abundant blood serum protein albumin interacts with dense polymer brush-grafted SPIONs. Herein, we use isothermal titration calorimetry to characterize the nonspecific interactions between human serum albumin, human serum immunoglobulin G, human transferrin, and hen egg lysozyme with monodisperse poly(2-alkyl-2-oxazoline)-grafted SPIONs with different grafting densities and core sizes. These particles show similar protein interactions despite their different "stealth" capabilities in cell culture. The SPIONs resist attractive interactions with lysozymes and transferrins, but they both show a significant exothermic enthalpic and low exothermic entropic interaction with low stoichiometry for albumin and immunoglobulin G. Our results highlight that protein size, flexibility, and charge are important to predict protein corona formation on polymer brush-stabilized nanoparticles. Nanoparticle ; Biophysics ; Chemistry ; Human serum albumin ; Polymer ; Chemical engineering ; Isothermal titration calorimetry ; Protein adsorption ; Polymer chemistry ; Materials science ; Nanotechnology ; Chromatography ; Biochemistry ; Organic chemistry Nanoparticle-Based Drug Delivery ; Protein Interaction Studies and Fluorescence Analysis ; Blood properties and coagulation
Authors: Meriene Gandara | Emerson Sarmento Gonçalves
Source: Electrochimica Acta (article, 2020-04-08)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Polyaniline supercapacitor electrode and carbon fiber graphene oxide: Electroactive properties at the charging limit Graphene ; Supercapacitor ; Polyaniline ; Materials science ; Electrode ; Energy storage ; Oxide ; Nanotechnology ; Electrochemistry ; Chemical engineering ; Composite material ; Chemistry ; Polymer ; Power (physics) Supercapacitor Materials and Fabrication ; Conducting polymers and applications ; Advanced Sensor and Energy Harvesting Materials
Authors: Xiaoxiao Cheng | Tengfei Miao | Yilin Qian | Zhengbiao Zhang | Wei Zhang | Xiulin Zhu
Source: International Journal of Molecular Sciences (review, 2020-08-27)
Field: Materials Science — Biomaterials

Supramolecular Chirality in Azobenzene-Containing Polymer System: Traditional Postpolymerization Self-Assembly Versus In Situ Supramolecular Self-Assembly Strategy Recently, the design of novel supramolecular chiral materials has received a great deal of attention due to rapid developments in the fields of supramolecular chemistry and molecular self-assembly. Supramolecular chirality has been widely introduced to polymers containing photoresponsive azobenzene groups. On the one hand, supramolecular chiral structures of azobenzene-containing polymers (Azo-polymers) can be produced by nonsymmetric arrangement of Azo units through noncovalent interactions. On the other hand, the reversibility of the photoisomerization also allows for the control of the supramolecular organization of the Azo moieties within polymer structures. The construction of supramolecular chirality in Azo-polymeric self-assembled system is highly important for further developments in this field from both academic and practical points of view. The postpolymerization self-assembly strategy is one of the traditional strategies for mainly constructing supramolecular chirality in Azo-polymers. The in situ supramolecular self-assembly mediated by polymerization-induced self-assembly (PISA) is a facile one-pot approach for the construction of well-defined supramolecular chirality during polymerization process. In this review, we focus on a discussion of supramolecular chirality of Azo-polymer systems constructed by traditional postpolymerization self-assembly and PISA-mediated in situ supramolecular self-assembly. Furthermore, we will also summarize the basic concepts, seminal studies, recent trends, and perspectives in the constructions and applications of supramolecular chirality based on Azo-polymers with the hope to advance the development of supramolecular chirality in chemistry. Azobenzene ; Supramolecular chemistry ; Supramolecular chirality ; Chirality (physics) ; Photoisomerization ; Supramolecular polymers ; Self-assembly ; Materials science ; Supramolecular assembly ; Polymerization ; Nanotechnology ; Polymer ; Supramolecular catalysis ; Chemistry ; Organic chemistry ; Molecule ; Catalysis ; Physics Supramolecular Self-Assembly in Materials ; Polydiacetylene-based materials and applications ; Photochromic and Fluorescence Chemistry
Authors: Barbara Wirthl | Johannes Kremheller | Bernhard A. Schrefler | Wolfgang A. Wall
Source: PLoS ONE (article, 2020-02-05)
Field: Materials Science — Biomaterials

Extension of a multiphase tumour growth model to study nanoparticle delivery to solid tumours One of the main challenges in increasing the efficacy of conventional chemotherapeutics is the fact that they do not reach cancerous cells at a sufficiently high dosage. In order to remedy this deficiency, nanoparticle-based drugs have evolved as a promising novel approach to more specific tumour targeting. Nevertheless, several biophysical phenomena prevent the sufficient penetration of nanoparticles in order to target the entire tumour. We therefore extend our vascular multiphase tumour growth model, enabling it to investigate the influence of different biophysical factors on the distribution of nanoparticles in the tumour microenvironment. The novel model permits the examination of the interplay between the size of vessel-wall pores, the permeability of the blood-vessel endothelium and the lymphatic drainage on the delivery of particles of different sizes. Solid tumours develop a non-perfused core and increased interstitial pressure. Our model confirms that those two typical features of solid tumours limit nanoparticle delivery. Only in case of small nanoparticles is the transport dominated by diffusion, and particles can reach the entire tumour. The size of the vessel-wall pores and the permeability of the blood-vessel endothelium have a major impact on the amount of delivered nanoparticles. This extended in-silico tumour growth model permits the examination of the characteristics and of the limitations of nanoparticle delivery to solid tumours, which currently complicate the translation of nanoparticle therapy to a clinical stage. Nanoparticle ; Penetration (warfare) ; Materials science ; Nanotechnology ; Biomedical engineering ; Biophysics ; Chemistry ; Medicine ; Biology Nanoparticle-Based Drug Delivery ; Nanoplatforms for cancer theranostics ; Mathematical Biology Tumor Growth
Authors: Kasper Nørskov Kragh | Desirée Gijón | Ainhize Maruri-Aransolo | Alberto Antonelli | Marco Coppi | Mette Kolpen | Stephanie Crone | Chaitanya Tellapragada | Badrul Hasan | Stine Radmer | Corné de Vogel | Willem J. B. van Wamel | Annelies Verbon | Christian G. Giske | Gian María Rossolini | Rafael Cantón | Niels Frimodt‐Møller
Source: Journal of Antimicrobial Chemotherapy (article, 2020-12-18)
Field: Chemistry — Physical and Theoretical Chemistry

Effective antimicrobial combination <i>in vivo</i> treatment predicted with microcalorimetry screening These data support microcalorimetic metabolic readout to predict additive or synergistic effects of combination treatment of MDR infections within hours. Isothermal microcalorimetry ; Antimicrobial ; In vivo ; Antibacterial agent ; Microbiology ; Medicine ; Antibiotics ; Chemistry ; Biology ; Pharmacology ; Biotechnology thermodynamics and calorimetric analyses ; Antibiotics Pharmacokinetics and Efficacy ; Inhalation and Respiratory Drug Delivery
Authors: Xia Huang | Hatice Mutlu | Patrick Théato
Source: Colloid & Polymer Science (article, 2020-09-25)
Field: Materials Science — Materials Chemistry

The toolbox of porous anodic aluminum oxide–based nanocomposites: from preparation to application Abstract Anodic aluminum oxide (AAO) templates have been intensively investigated during the past decades and have meanwhile been widely applied through both sacrificial and non-sacrificial pathways. In numerous non-sacrificial applications, the AAO membrane is maintained as part of the obtained composite materials; hence, the template structure and topography determine to a great extent the potential applications. Through-hole isotropic AAO features nanochannels that promote transfer of matter, while anisotropic AAO with barrier layer exhibits nanocavities suitable as independent and homogenous containers. By combining the two kinds of AAO membranes with diverse organic and inorganic materials through physical interactions or chemical bonds, AAO composites are designed and applied in versatile fields such as catalysis, drug release platform, separation membrane, optical appliances, sensors, cell culture, energy, and electronic devices. Therefore, within this review, a perspective on exhilarating prospect for complementary advancement on AAO composites both in preparation and application is provided. Anodic Aluminum Oxide ; Nanotechnology ; Materials science ; Membrane ; Nanocomposite ; Template ; Anode ; Porosity ; Oxide ; Anodizing ; Aluminium ; Fabrication ; Composite material ; Electrode ; Chemistry ; Metallurgy Anodic Oxide Films and Nanostructures ; Semiconductor materials and devices ; Nanoporous metals and alloys
Authors: Zhichun Shi | Wei Chen | Shun‐Ze Zhan | Mian Li | Mo Xie | Yan Yan Li | Seik Weng Ng | Yong‐Liang Huang | Zhiyong Zhang | Guo‐Hong Ning | Dan Li
Source: Inorganic Chemistry Frontiers (article, 2020-01-01)
Field: Chemistry — Organic Chemistry

Guest effects on crystal structure and phosphorescence of a Cu<sub>6</sub>L<sub>3</sub> prismatic cage The crystal packing and photoluminescent properties of coordination cage can be fine-tuned <italic>via</italic> the encapsulation of aromatic guests with different substituents. Cage ; Phosphorescence ; Photoluminescence ; Crystal structure ; Crystallography ; Crystal (programming language) ; Materials science ; Chemistry ; Nanotechnology ; Physics ; Optoelectronics ; Fluorescence ; Optics ; Computer science ; Structural engineering ; Engineering Supramolecular Chemistry and Complexes ; Metal-Organic Frameworks: Synthesis and Applications ; Molecular Sensors and Ion Detection
Authors: Nisar Ali | Muhammad Bilal | Adnan Khan | Farman Ali | Mohamad Nasir Mohamad Ibrahim | Xiaoyan Gao | Shizhong Zhang | Kun Hong | Hafiz M.N. Iqbal
Source: Engineering (article, 2020-11-05)
Field: Materials Science — Surfaces, Coatings and Films

Engineered Hybrid Materials with Smart Surfaces for Effective Mitigation of Petroleum-Originated Pollutants The generation and controlled or uncontrolled release of hydrocarbon-contaminated industrial wastewater effluents to water matrices are a major environmental concern. The contaminated water comes to surface in the form of stable emulsions, which sometimes require different techniques to mitigate or separate effectively. Both the crude emulsions and hydrocarbon-contaminated wastewater effluents contain suspended solids, oil/grease, organic matter, toxic elements, salts, and recalcitrant chemicals. Suitable treatment of crude oil emulsions has been one of the most important challenges due to the complex nature and the substantial amount of generated waste. Moreover, the recovery of oil from waste will help meet the increasing demand for oil and its derivatives. In this context, functional nanostructured materials with smart surfaces and switchable wettability properties have gained increasing attention because of their excellent performance in the separation of oil–water emulsions. Recent improvements in the design, composition, morphology, and fine-tuning of polymeric nanostructured materials have resulted in enhanced demulsification functionalities. Herein, we reviewed the environmental impacts of crude oil emulsions and hydrocarbon-contaminated wastewater effluents. Their effective treatments by smart polymeric nanostructured materials with wettability properties have been stated with suitable examples. The fundamental mechanisms underpinning the efficient separation of oil–water emulsions are discussed with suitable examples along with the future perspectives of smart materials. Wastewater ; Effluent ; Context (archaeology) ; Waste management ; Environmental science ; Pollutant ; Petroleum ; Hydrocarbon ; Contamination ; Materials science ; Environmental engineering ; Chemistry ; Engineering ; Geology ; Organic chemistry Surface Modification and Superhydrophobicity ; Pickering emulsions and particle stabilization ; Membrane Separation Technologies
Authors: Alessia C. G. Weiss | Heike M. Herold | Sarah Lentz | Matthew Faria | Quinn A. Besford | Ching‐Seng Ang | Frank Caruso | Thomas Scheibel
Source: ACS Applied Materials & Interfaces (article, 2020-05-05)
Field: Materials Science — Biomaterials

Surface Modification of Spider Silk Particles to Direct Biomolecular Corona Formation In recent years, spider silk-based materials have attracted attention because of their biocompatibility, processability, and biodegradability. For their potential use in biomaterial applications, i.e., as drug delivery systems and implant coatings for tissue regeneration, it is vital to understand the interactions between the silk biomaterial surface and the biological environment. Like most polymeric carrier systems, spider silk material surfaces can adsorb proteins when in contact with blood, resulting in the formation of a biomolecular corona. Here, we assessed the effect of surface net charge of materials made of recombinant spider silk on the biomolecular corona composition. In-depth proteomic analysis of the biomolecular corona revealed that positively charged spider silk materials surfaces interacted predominantly with fibrinogen-based proteins. This fibrinogen enrichment correlated with blood clotting observed for both positively charged spider silk films and particles. In contrast, negative surface charges prevented blood clotting. Genetic engineering allows the fine-tuning of surface properties of the spider silk particles providing a whole set of recombinant spider silk proteins with different charges or peptide tags to be used for, for example, drug delivery or cell docking, and several of these were analyzed concerning the composition of their biomolecular corona. Taken together this study demonstrates how the surface net charge of recombinant spider silk surfaces affects the composition of the biomolecular corona, which in turn affects macroscopic effects such as fibrin formation and blood clotting. Spider silk ; SILK ; Biomaterial ; Materials science ; Nanotechnology ; Biocompatibility ; Spider ; Drug delivery ; Corona (planetary geology) ; Composite material ; Biology Silk-based biomaterials and applications ; Polymer Surface Interaction Studies ; Periodontal Regeneration and Treatments
Authors: Thiago L. Vasconcelos | Bráulio S. Archanjo | Bruno Oliveira | William F. Silva | Rafael S. Alencar | Cassiano Rabelo | Carlos A. Achete | Ado Jório | Luiz Gustavo Cançado
Source: IEEE Journal of Selected Topics in Quantum Electronics (article, 2020-07-10)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Optical Nanoantennas for Tip-Enhanced Raman Spectroscopy The role of plasmon resonance on the optical efficiency of nanoantennas for tip-enhanced Raman spectroscopy (TERS) is reviewed. Technical details on surface plasmon polaritons (SPP), localized surface plasmon resonance (LSPR), and the plasmon gap mode are provided. Nanotechnology engineering is necessary to adequate the nanoantenna's size, shape and composition to match resonance conditions with the exciting radiation source. Computational simulation guides the development of new types of plasmonic nanoantennas with different materials and morphologies, specially designed to reach target applications. An overview on a recently developed nanoantenna composed by a truncated micropyramidal body with a nanopyramid end is presented. The characteristic length L of the nanopyramid tip is dimensioned to fine-tune LSPR modes, giving rise to the so-called plasmon-tunable tip pyramid (PTTP). The plasmonic properties of this type of probe were investigated by electron energy loss spectroscopy and computational simulations, reveling that PTTPs act as monopole nanoantennas. TERS results obtained with the PTTPs demonstrate the achievement of unprecedent levels of field enhancement mediated by LSPR with excellent reproducibility rate. Plasmon ; Materials science ; Surface plasmon resonance ; Surface plasmon polariton ; Raman spectroscopy ; Optoelectronics ; Surface plasmon ; Spectroscopy ; Surface-enhanced Raman spectroscopy ; Metamaterial ; Optics ; Nanotechnology ; Raman scattering ; Nanoparticle ; Physics Gold and Silver Nanoparticles Synthesis and Applications ; Plasmonic and Surface Plasmon Research ; Near-Field Optical Microscopy
Authors: Luana Amoroso | Giuseppe Muratore | Marco Aldo Ortenzi | Stefano Gazzotti | Sara Limbo | Luciano Piergiovanni
Source: Polymers (article, 2020-01-02)
Field: Materials Science — Biomaterials

Fast Production of Cellulose Nanocrystals by Hydrolytic-Oxidative Microwave-Assisted Treatment In contrast to conventional approaches, which are considered to be energy- and time-intensive, expensive, and not green, herein, we report an alternative microwave-assisted ammonium persulfate (APS) method for cellulose nanocrystals (CNCs) production, under pressurized conditions in a closed reaction system. The aim was to optimize the hydrolytic-oxidative patented procedure (US 8,900,706), replacing the conventional heating with a faster process that would allow the industrial scale production of the nanomaterial and make it more appealing to a green economy. A microwave-assisted process was performed according to different time-temperature programs, varying the ramp (from 5 to 40 min) and the hold heating time (from 60 to 90 min), at a fixed reagent concentration and weight ratio of the raw material/APS solution. Differences in composition, structure, and morphology of the nanocrystals, arising from traditional and microwave methods, were studied by several techniques (TEM, Fourier transform infrared spectroscopy (FTIR)-attenuated total reflectance (ATR), dynamic light scattering (DLS), electrophoretic light scattering (ELS), thermogravimetric analysis (TGA), X-ray diffraction (XRD)), and the extraction yields were calculated. Fine tuning the microwave treatment variables, it was possible to realize a simple, cost-effective way for faster materials' preparation, which allowed achieving high-quality CNCs, with a defined hydrodynamic diameter (150 nm) and zeta potential (-0.040 V), comparable to those obtained using conventional heating, in only 90 min instead of 16 h. Dynamic light scattering ; Materials science ; Thermogravimetric analysis ; Fourier transform infrared spectroscopy ; Microwave ; Raw material ; Ammonium persulfate ; Nanomaterials ; Zeta potential ; Reagent ; Chemical engineering ; Cellulose ; Nanocellulose ; Nanotechnology ; Chemistry ; Nanoparticle ; Organic chemistry ; Computer science ; Composite material Advanced Cellulose Research Studies ; Enzyme-mediated dye degradation ; Biofuel production and bioconversion
Authors: Cheng Cheng Shen | Sabine Petit | Cunjun Li | Chun Sheng Li | Nafeesa Khatoon | Chun Hui Zhou
Source: Applied Clay Science (article, 2020-09-29)
Field: Materials Science — Biomaterials

Interactions between smectites and polyelectrolytes Polyelectrolyte ; Flocculation ; Polyelectrolyte adsorption ; Clay minerals ; Adsorption ; Chemical engineering ; Chemistry ; Hectorite ; Dispersion (optics) ; Aqueous solution ; Thixotropy ; Mineralogy ; Polymer ; Organic chemistry Clay minerals and soil interactions ; Coagulation and Flocculation Studies ; Iron oxide chemistry and applications