jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Noemi Gallucci | Alessandro Cangiano | Simone Russo | Giulio Pota | Rocco Di Girolamo | E. Martínez | Nicolas Vaxelaire | Luigi Paduano | Giuseppe Vitiello
Source: Materials Chemistry Frontiers (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Colloidal fluorine-doped ZnO quantum dots: the synergistic action of atomic doping and growth conditions directs fluorescence and photoactivity F/ZnO-QDs of R ∼ 3 nm and relative quantum yield of 22% are obtained via wet-precipitation at 5 at% nominal F content. F/ZnO-NCs of R ∼ 30 nm, high surface defects and photoactivity are obtained via the solvothermal route at 5 at% nominal F content. Doping ; Quantum dot ; Materials science ; Fluorine ; Quantum yield ; Precipitation ; Colloid ; Fluorescence ; Zinc ; Photochemistry ; Chemical engineering ; Inorganic chemistry ; Nanotechnology ; Chemistry ; Optoelectronics ; Metallurgy ; Optics ZnO doping and properties ; Quantum Dots Synthesis And Properties ; Carbon and Quantum Dots Applications
Authors: Saki Arimura | Ikuya Matsumoto | Ryo Sekiya | Takeharu Haino
Source: Angewandte Chemie International Edition (article, 2024-01-08)
Field: Materials Science — Materials Chemistry

Intermediate Color Emission via Nanographenes with Organic Fluorophores Photoluminescence (PL) color can be tuned by mixing fluorophores emitting the three primary colors in an appropriate ratio. When color tuning is achieved on a single substrate, we can simplify device structures. We demonstrated that nanographenes (NGs), which are graphene fragments with a size of tens of nanometers, could be utilized as carriers of fluorophores. The addition of red- and blue-light-emitting fluorophores on the edge successfully reproduced the purple light. The relative PL intensities of the fluorophores could be regulated by the excitation wavelength, enabling multicolor emission between blue and red light. Owing to the triphenylamine units of the fluorophores, the NGs showed PL enhancement due to aggregation. This characteristic was valuable for the fabrication of solid polymer materials. Specifically, the functionalized NGs can be dispersed into polyvinylidene difluoride. The resultant polymer films emitted red, blue, and purple color. Our study demonstrated the potential applicability of NGs for fluorophore carriers capable of reproducing intermediate colors of light. Fluorophore ; Photoluminescence ; Materials science ; Fluorescence ; Optoelectronics ; Polymer ; Fabrication ; Luminescence ; Nanotechnology ; Photochemistry ; Chemistry ; Optics Luminescence and Fluorescent Materials ; Carbon and Quantum Dots Applications ; Organic Light-Emitting Diodes Research
Authors: Chawakwan Nitikornwarakul | Rodjanawan Wangpradid | Natthida Rakkapao
Source: Polymers (article, 2024-05-11)
Field: Materials Science — Biomaterials

Impact of Molar Composition on the Functional Properties of Glutinous Rice Starch–Chitosan Blend: Natural-Based Active Coating for Extending Mango Shelf Life This study investigates natural-based blends of glutinous rice starch (GRS) and chitosan (CS), varying their molar composition (0:100, 30:70, 50:50, 70:30, and 100:0) to explore their interaction dynamics. Our findings illustrate the versatility of these blends in solution and film forms, offering applications across diverse fields. Our objective is to understand their impact on coatings designed to extend the post-harvest shelf life of mangoes. Results reveal that increasing chitosan content in GRS/CS blends enhances mechanical strength, hydrophobicity, and resistance to <i>Colletotrichum gloeosporioides</i> infection, a common cause of mango anthracnose. These properties overcome limitations of GRS films. Advanced techniques, including FTIR analysis and stereo imaging, confirmed robust interaction between GRS/CS blend films and mango cuticles, improving coverage with higher chitosan content. This comprehensive coverage reduces mango dehydration and respiration, thereby preserving quality and extending shelf life. Coating with a GRS/CS blend containing at least 50% chitosan effectively prevents disease progression and maintains quality over a 10-day storage period, while uncoated mangoes fail to meet quality standards within 2 days. Moreover, increasing the starch proportion in GRS/CS blends enhances film density, optical properties, and reduces reliance on acidic solvents, thereby minimizing undesirable changes in product aroma and taste. Chitosan ; Shelf life ; Starch ; Coating ; Aroma ; Postharvest ; Materials science ; Food science ; Composition (language) ; Chemical engineering ; Chemistry ; Composite material ; Horticulture ; Organic chemistry ; Biology Nanocomposite Films for Food Packaging ; Postharvest Quality and Shelf Life Management ; Date Palm Research Studies
Authors: Lei Lei | Naganatha Patil | A. Arnoux | Clémence Le Cœur | Yoann de Rancourt de Mimérand | Daniel Grande | Benjamin Le Droumaguet | Xiaoshuang Feng | Yves Gnanou | Benoît Couturaud
Source: Macromolecules (article, 2024-11-12)
Field: Chemistry — Organic Chemistry

Transition from Steric to Electrostatic Stabilization in Shell-Degradable Waterborne Particles Obtained by Photopolymerization-Induced Self-Assembly Semidegradable nanoparticles were synthesized in aqueous medium by photoinitiated polymerization-induced self-assembly, using a cleavable hydrophilic copolymer as a steric stabilizer that also served as a macromolecular chain transfer agent (mCTA) for the reversible addition–fragmentation chain transfer (RAFT) polymerization of 2-hydroxypropyl methacrylate (HPMA). This mCTA was obtained by modification of a pH-sensitive poly[(ethylene carbonate)-co-(ethylene oxide)] (PECEO) random copolymer that was end-fitted with a trithiocarbonate moiety. By adjusting the degree of polymerization of HPMA through RAFT, we achieved the synthesis of a series of amphiphilic block copolymers that self-assembled in various morphologies, including spheres, worms, and vesicles. Through characterization by 1H nuclear magnetic resonance, size exclusion chromatography, and transmission electron microscopy, it could be demonstrated that the carbonate linkages of their hydrophilic block and of their steric stabilizer undergo hydrolysis under alkaline conditions. The length of the PHPMA block and the balance between the hydrophilic and hydrophobic blocks are two parameters that have a significant impact on the self-assembly of these particles; a transition from steric to electrostatic stabilization of these nanoparticles could be witnessed during degradation for short PHPMA blocks. In summary, pH-sensitive nanoparticles sterically stabilized by degradable poly(ether-co-ether carbonate) copolymers gave rise under basic conditions to nanoparticles stabilized by electrostatic interaction. Chain transfer ; Copolymer ; Polymer chemistry ; Polymerization ; Methacrylate ; Chemistry ; Steric effects ; Reversible addition−fragmentation chain-transfer polymerization ; Amphiphile ; Materials science ; Radical polymerization ; Organic chemistry ; Polymer Advanced Polymer Synthesis and Characterization ; biodegradable polymer synthesis and properties ; Antimicrobial agents and applications
Authors: Shiyu Fang | Yue Li | Songzi Kou | Fei Sun
Source: Advanced Functional Materials (article, 2024-12-17)
Field: Materials Science — Biomaterials

Harnessing the Potential of Spider Silk Proteins for Biomedical Applications: from Native Silk Fibers to Designed Bioactive Materials Abstract Spider silk has only been used anecdotally throughout human history, owing to limited supply from natural sources and recalcitrance toward biochemical functionalization. Recent advances in materials synthetic biology have ameliorated the challenges of mass‐producing spider silk and have thus paved the way for reengineering and redesigning these materials for real‐world applications. Here, an update is presented on the development of biomaterials comprising spider silk proteins within the past five years and the respective chemical and genetic approaches behind these developments. Potential applications are further highlighted in areas such as 3‐dimension (3D) cell culturing, drug delivery, theranostics, wound healing, tissue engineering, anti‐infection, and so on. By providing some glimpses into the latest innovations centered around spider silk proteins, as well as the challenges facing their biomedical applications, it is hoped that this will inspire more translational studies of these materials for real‐world impact. Spider silk ; SILK ; Materials science ; Nanotechnology ; Fibroin ; Polymer science ; Composite material Silk-based biomaterials and applications ; Biochemical and Structural Characterization ; Antimicrobial Peptides and Activities
Authors: Weimao Zhong | Zachary L. Budimir | L. F. Johnson | Elizabeth I. Parkinson | Vinayak Agarwal
Source: Organic Letters (article, 2024-10-21)
Field: Chemistry — Organic Chemistry

Activity and Biocatalytic Potential of an Indolylamide Generating Thioesterase The chemical synthesis of <i>N</i>-acyl indoles is hindered by the poor nucleophilicity of indolic nitrogen, necessitating the use of strongly basic reaction conditions that encumber elaboration of highly functionalized scaffolds. Herein, we describe the total chemoenzymatic synthesis of the bulbiferamide natural products by the biochemical activity reconstitution of a nonribosomal peptide synthetase assembly line-derived (NRPS-derived) thioesterase that neatly installs the macrocyclizing indolylamide. The enzyme represents a starting point for biocatalytic access to macrocyclic indolylamide peptides and natural products. Chemistry ; Thioesterase ; Combinatorial chemistry ; Stereochemistry ; Enzyme ; Biochemistry ; Biosynthesis Click Chemistry and Applications ; Chemical Synthesis and Analysis ; Microbial Natural Products and Biosynthesis
Authors: Diogo A. Gálico | Muralee Murugesu
Source: Advanced Optical Materials (article, 2024-08-05)
Field: Materials Science — Materials Chemistry

Magnetic Circularly Polarized Luminescence with Heterometallic Molecular Cluster‐Aggregates Abstract Magnetic circularly polarized luminescence (MCPL) is a technique based on the differential emission of left and right circularly polarized light induced by a magnetic field. This technique is the emission counterpart of to the widely explored magnetic circular dichroism. In this work, the first demonstration of MCPL is presented in heterometallic lanthanide(III) systems by using two molecular cluster aggregates, {Eu 1 Tb 19 } and {Eu 3 Tb 17 } . The results presented here indicate the potential that MCPL holds for obtaining highly tuned magneto‐optical materials for various applications, such as anti‐counterfeiting materials. Additionally, the findings suggest that magnetic interactions between the ions modulate the dissymmetry factor, opening the possibility of the development of highly tunable MCPL materials. Materials science ; Luminescence ; Circular polarization ; Cluster (spacecraft) ; Magnetic circular dichroism ; Optoelectronics ; Nanotechnology ; Optics ; Physics Luminescence Properties of Advanced Materials ; Lanthanide and Transition Metal Complexes ; Nanocluster Synthesis and Applications
Authors: Chang‐Sheng Wang | Duy Anh Phạm | Zhang Hu | Jean‐Michel Rabanel | Nahid Hassanpour | Xavier Banquy
Source: Advanced Functional Materials (article, 2024-06-07)
Field: Materials Science — Surfaces, Coatings and Films

Layer‐by‐Layer Deposition of a Polycationic Bottlebrush Polymer with Hyaluronic Acid Reveals Unusual Assembly Mechanism and Selective Effect on Cell Adhesion and Fate Abstract This study provides a detailed molecular mechanism of the layer‐by‐layer (LbL) film formation process involving BB polymers. The roles of adsorbed and non‐adsorbed chain segments during the layer buildup are revealed by employing surface force apparatus (SFA) and atomic force microscopy (AFM) to probe critical aspects such as surface coverage, polymer conformation at the surface, adhesive properties, and morphology after each layer deposition. The results show that the thickness, nanomechanical properties, and surface chemistry of the nanofilms are significantly influenced by the number of layers. All these cues have an important impact on cell behavior when employed as coatings for culture substrates. The evidence is shown that cells respond very differently to these cues and exhibit behavior that goes from superproliferation down to accelerated death. Hyaluronic acid ; Materials science ; Layer (electronics) ; Mechanism (biology) ; Adhesion ; Deposition (geology) ; Polymer ; Layer by layer ; Chemical engineering ; Nanotechnology ; Biophysics ; Composite material ; Biology ; Anatomy Polymer Surface Interaction Studies ; Silk-based biomaterials and applications ; Hydrogels: synthesis, properties, applications
Authors: Ya Zhu | Marco Beaumont | Katariina Solin | Panagiotis Spiliopoulos | Bin Zhao | Han Tao | Eero Kontturi | Long Bai | Orlando J. Rojas
Source: Small (article, 2024-07-16)
Field: Materials Science — Materials Chemistry

Interfacial Membranization of Regenerated Cellulose Nanoparticles and a Protein Renders Stable Water‐in‐Water Emulsion Pickering water-in-water (W/W) emulsions stabilized by biobased colloids are pertinent to engineering biomaterials with hierarchical and confined architectures. In this study, stable W/W emulsions are developed through membranization utilizing biopolymer structures formed by the adsorption of cellulose II nanospheres and a globular protein, bovine serum albumin (BSA), at droplet surfaces. The produced cellulose II nanospheres (NPcat, 63 nm diameter) bearing a soft and highly accessible shell, endow rapid and significant binding (16 mg cm<sup>-</sup> <sup>2</sup>) with BSA. NPcat and BSA formed complexes that spontaneously stabilized liquid droplets, resulting in stable W/W emulsions. It is proposed that such a system is a versatile all-aqueous platform for encapsulation, (bio)catalysis, delivery, and synthetic cell mimetics. Biopolymer ; Bovine serum albumin ; Pickering emulsion ; Chemical engineering ; Cellulose ; Emulsion ; Nanoparticle ; Materials science ; Aqueous solution ; Colloid ; Adsorption ; Regenerated cellulose ; Polymer chemistry ; Polymer ; Chemistry ; Nanotechnology ; Organic chemistry ; Chromatography ; Composite material Pickering emulsions and particle stabilization ; Advanced Cellulose Research Studies ; Proteins in Food Systems
Authors: Wen Fan | Yu Wang | Bowen Tu | Lun Cui
Source: Gels (article, 2024-01-17)
Field: Materials Science — Biomaterials

Superfast Gelation of Spider Silk-Based Artificial Silk Protein Spider silk proteins (spidroins) have garnered attention in biomaterials research due to their ability to self-assemble into hydrogels. However, reported spidroin hydrogels require high protein concentration and prolonged gelation time. Our study engineered an artificial spidroin that exhibits unprecedented rapid self-assembly into hydrogels at physiologically relevant conditions, achieving gelation at a low concentration of 6 mg/mL at 37 °C without external additives. Remarkably, at a 30 mg/mL concentration, our engineered protein forms hydrogels within 30 s, a feature we termed "superfast gelation". This rapid formation is modulated by ions, pH, and temperature, offering versatility in biomedical applications. The hydrogel's capacity to encapsulate proteins and support <i>E. coli</i> growth while inducing RFP expression provides a novel platform for drug delivery and bioengineering applications. Our findings introduce a superfast, highly adaptable, and cytocompatible hydrogel that self-assembles under mild conditions, underscoring the practical implication of rapid gelation in biomedical research and clinical applications. Self-healing hydrogels ; Spider silk ; SILK ; Nanotechnology ; Drug delivery ; Materials science ; Polymer science ; Tissue engineering ; Biophysics ; Chemistry ; Chemical engineering ; Polymer chemistry ; Biomedical engineering ; Biology ; Engineering Silk-based biomaterials and applications ; Biochemical and Structural Characterization ; Nanofabrication and Lithography Techniques
Authors: Anastasiia S. Garanina | Daniil A. Vishnevskiy | Anastasia A. Chernysheva | Julia Malinovskaya | Polina A. Lazareva | Alevtina S. Semkina | Maxim A. Abakumov | Victor Naumenko
Source: Biomedicines (article, 2024-09-25)
Field: Materials Science — Biomaterials

The Internalization Pathways of Liposomes, PLGA, and Magnetic Nanoparticles in Neutrophils Understanding the distinct endocytosis pathways for different nanoparticles can improve the efficacy of neutrophil loading with nanodrugs, potentially advancing the development of neutrophil-based cancer therapies. The findings underscore the importance of the extracellular environment in modulating nanoparticle uptake. Internalization ; Liposome ; PLGA ; Chemistry ; Cell biology ; Biophysics ; Biochemistry ; Biology ; In vitro ; Cell Nanoparticle-Based Drug Delivery ; Characterization and Applications of Magnetic Nanoparticles ; Nanoparticles: synthesis and applications
Authors: Tuchathum Tosakul | Peerapong Chanthot | Cattaleeya Pattamaprom
Source: Scientific Reports (article, 2024-08-10)
Field: Materials Science — Biomaterials

High toughness and fast home-compost biodegradable packaging films derived from polylactic acid/thermoplastic starch/para-rubber ternary blends This research aims to formulate biobased and biodegradable packaging films with high toughness and fast home-compost biodegradation using ternary blends of polylactic acid (PLA), Para rubber (NR), and thermoplastic starch (TPS) through blown-film extrusion. The TPS content in this work ranges from 5 to 20 wt%, while the PLA: NR ratio is fixed at 70:30. At this PLA: NR ratio, the blend with 10 wt% TPS (PNT10) exhibited the highest % elongation at break and tensile toughness. Peroxide radical initiator was investigated as a potential additive for improving the properties of the ternary blend. Our binary interaction study indicated that peroxide initiated grafting reactions of PLA-NR and NR-TPS pairs, while no grafting occurred between PLA and TPS. In ternary blends, the highest peroxide content (0.5 wt%) increased the % elongation at break up to 120%, with the tensile toughness reaching 7255 MJ/m<sup>3</sup>. The improved compatibility induced by peroxide addition was supported by enhanced dispersion of TPS in the PLA/NR matrices. Results from the room-temperature soil burial test indicated that the presence of TPS could significantly accelerate the home-compost degradation of PNT films compared to films produced from neat PLA and PLA/NR. This suggests its potential as both a cost reducer and a biodegradation accelerator. Polylactic acid ; Thermoplastic ; Starch ; Natural rubber ; Materials science ; Composite material ; Ternary operation ; Biodegradable polymer ; Polymer ; Chemistry ; Organic chemistry ; Computer science biodegradable polymer synthesis and properties ; Microplastics and Plastic Pollution ; Nanocomposite Films for Food Packaging
Authors: Haixiang Pang | Yunxiang You
Source: Physics of Fluids (article, 2024-02-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Realizing the multifunctional microfluidic flow manipulation based on hydrodynamic metamaterials From their initial application to the fields of chemistry and biology, microfluidic chips used as micro total analysis systems have developed into new technologies to satisfy the requirements of various societal industries. Microchannels are essential components of microfluidic chips; they play a vital role in connecting the inlet and outlet as well as determining the flow distribution and reagent mixing. Microfluidic research has always been devoted to minimizing energy dissipation, fluid resistance, and pressure drop to realize energy-efficient microfluidic chips. This study proposes a new theory for manipulating the flow in microchannels based on hydrodynamic metamaterials according to the spatial transformation theory. In particular, hydrodynamic metamaterials are specifically designed to construct flow shifters, flow splitters, and flow combiners, and theoretical and numerical simulations are performed to assess their hydrodynamic performance. The systematic design of hydrodynamic metamaterial devices proposed in this work establishes a theoretical framework to achieve a steady flow state without inducing unstable flow disturbances in complex-shape microchannels. Physics ; Microfluidics ; Flow (mathematics) ; Metamaterial ; Mechanics ; Fluid dynamics ; Nanotechnology ; Classical mechanics ; Optics ; Thermodynamics Metamaterials and Metasurfaces Applications ; Acoustic Wave Phenomena Research ; Advanced Sensor and Energy Harvesting Materials
Authors: Fahri Çatoğlu | Sinem Altınışık | Sermet Koyuncu
Source: ACS Omega (article, 2024-06-28)
Field: Materials Science — Polymers and Plastics

Comparative Study of Electrochromic Supercapacitor Electrodes Based on PEDOT:PSS/ITO Fabricated via Spray and Electrospray Methods PSS electrodes exhibit areal energy densities of 0.41 and 0.84 mW h cm<sup>-2</sup>, along with power densities of 4.96 and 4.97 μW cm<sup>-2</sup>, respectively. Moreover, electrode_2 demonstrates a high coloration efficiency of 84.32 cm<sup>2</sup> C<sup>-1</sup> and fast response times of 1.36 s for coloration and 0.98 s for bleaching. This study highlights the advantages of electrospray deposition over traditional methods, showcasing the potential of electrospray-prepared PEDOT:PSS electrodes for use in multifunctional energy storage devices. PEDOT:PSS ; Materials science ; Electrochromism ; Electrode ; Fourier transform infrared spectroscopy ; Electrochromic devices ; Scanning electron microscope ; Conductive polymer ; Raman spectroscopy ; Chemical engineering ; Supercapacitor ; Nanotechnology ; Electrochemistry ; Polymer ; Composite material ; Chemistry ; Optics Conducting polymers and applications ; Supercapacitor Materials and Fabrication ; Advanced Sensor and Energy Harvesting Materials
Authors: Abdulaziz A.M. Abahussain | Ahmed S. Al‐Fatesh | Dharmesh M. Vadodariya | Jehad K. Abu‐Dahrieh | Khaled M. Banabdwin | Naif Alarifi | Ahmed A. Ibrahim | Anis H. Fakeeha | Ahmed E. Abasaeed | Rawesh Kumar
Source: Energy Science & Engineering (article, 2024-07-02)
Field: Materials Science — Materials Chemistry

The role of ceria in promoting Ni catalysts supported on phosphate‐modified zirconia for the partial oxidation of methane Abstract The catalytic partial oxidation of methane (POM) is aimed at the mitigation of CH 4 (a highly potent greenhouse gas) from the environment and the synthesis of syngas with a high H 2 /CO ratio. Herein, to enhance the POM reaction, Ni‐supported phosphate‐modified‐zirconia were synthesized with promotor “Ce” to achieve high H 2 /CO ratio (2.4–3.2). The catalysts were characterized by surface area and porosity, X‐ray diffraction, RAMAN, temperature‐programmed experiments (TPR, CO 2 ‐TPD, and TPO), and TEM. Increasing the ceria addition over 10Ni/PO 4 + ZrO 2 resulted in lower crystallinity, higher dispersion of active sites, and enhanced the surface area of catalyst. The unique and prominent reducibility and basicity of NiO‐species and surface oxide ions, respectively, are particularly notable at 4 wt.% ceria loading. At a reaction temperature of 600°C, the highest concentration of active sites and a unique concentration of moderate strength basic sites can be achieved with 4 wt.% ceria loading over 10Ni/PO 4 + ZrO 2 . This leads to 44% conversion of CH 4 , 36% yield of H 2 , 35% yield of CO 2 , and H 2 /CO ratio of 3.16 for the POM reaction. The cyclic H 2 TPR‐O 2 TPO‐H 2 TPR experiment confirms the reorganization of the active site towards high temperature under oxidizing gas O 2 and reducing gas H 2 gas stream during the POM reaction. Catalysis ; Partial oxidation ; Syngas ; Methane ; Crystallinity ; Cubic zirconia ; Oxidizing agent ; Yield (engineering) ; Materials science ; Inorganic chemistry ; BET theory ; Chemical engineering ; Chemistry ; Crystallography ; Organic chemistry ; Metallurgy Catalytic Processes in Materials Science ; Catalysis and Oxidation Reactions ; Catalysts for Methane Reforming