jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Wenlin Qu | Wenfang Wang | Chen-Xue Zhang | Xiangwen Chen | Jian Wang | Wenhui Xue | Junxiang Zhu | Hao Wu
Source: Chemical Engineering Journal (article, 2023-10-27)
Field: Materials Science — Biomaterials

Development of composite film based on polyvinyl alcohol with binary nanoreinforcements for active packaging of fresh-cut apples Polyvinyl alcohol ; Active packaging ; Nanocomposite ; Vinyl alcohol ; Chemical engineering ; Ultimate tensile strength ; Materials science ; Chemistry ; Polymer ; Food packaging ; Nuclear chemistry ; Composite material ; Food science Nanocomposite Films for Food Packaging ; Electrospun Nanofibers in Biomedical Applications ; biodegradable polymer synthesis and properties
Authors: Aitor Erkoreka | Josu Martínez-Perdiguero | Richard J. Mandle | Alenka Mertelj | Nerea Sebastián
Source: Journal of Molecular Liquids (article, 2023-07-16)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Dielectric spectroscopy of a ferroelectric nematic liquid crystal and the effect of the sample thickness The recently discovered ferroelectric nematic liquid crystals have been reported to exhibit very large dielectric permittivity values. Here, we report a systematic investigation of the dielectric behavior of a prototypical ferroelectric nematogen by varying the thickness of the parallel capacitor measuring cell. While in the non-polar high temperature nematic phase results show only slight differences due to slight variations of the alignment, the measured permittivity values in the ferroelectric nematic phase show a linear dependence on the cell thickness. It is also shown that the characteristic relaxation frequency decreases inversely proportionally to the thickness. The results are discussed in terms of three different available models based on different underlying mechanisms, accounting for cancellation of the probe electric fields by polarization reorientation or by ionic charges, or based on a recently proposed continuous phenomenological model. Liquid crystal ; Ferroelectricity ; Permittivity ; Dielectric ; Materials science ; Dielectric spectroscopy ; Condensed matter physics ; Polarization (electrochemistry) ; Relaxation (psychology) ; Polar ; Dielectric permittivity ; Phase (matter) ; Dipole ; Electric field ; Optics ; Optoelectronics ; Chemistry ; Physics Liquid Crystal Research Advancements ; Material Dynamics and Properties ; Surfactants and Colloidal Systems
Authors: Jie Xu | Jiajia Tan | Chengzhou Song | Guoying Zhang | Xianglong Hu | Shiyong Liu
Source: Angewandte Chemie International Edition (article, 2023-05-26)
Field: Materials Science — Polymers and Plastics

Self‐Immolative Amphiphilic Poly(ferrocenes) for Synergistic Amplification of Oxidative Stress in Tumor Therapy Amphiphilic self-immolative polymers (SIPs) can achieve complete degradation solely through one triggerable event, which potentially optimize the blood clearance and uncontrollable/inert degradability for therapeutic nanoparticles. Herein, we report self-immolative amphiphilic poly(ferrocenes), BP<sup>nbs</sup> -Fc, composed by self-immolative backbone and aminoferrocene (AFc) side chains as well as end-capping poly(ethylene glycol) monomethyl ether. Upon triggering by tumor acidic milieu, the BP<sup>nbs</sup> -Fc nanoparticles readily degrade to release azaquinone methide (AQM) moieties, which can rapidly deplete intracellular glutathione (GSH) to cascade release AFc. Furthermore, both AFc and its product Fe<sup>2+</sup> can catalyze intracellular hydrogen peroxide (H<sub>2</sub> O<sub>2</sub> ) into highly reactive hydroxyl radicals (⋅OH), thus amplifying the oxidative stress of tumor cells. Rational synergy of GSH depletion and ⋅OH burst can efficiently inhibit tumor growth by the SIPs in vitro and in vivo. This work provides an elegant design to adopt innate tumor milieu-triggerable SIPs degradation to boost cellular oxidative stress, which is a promising candidate for precision medicine. Chemistry ; Amphiphile ; Ethylene glycol ; Oxidative stress ; Glutathione ; Biophysics ; Camptothecin ; Reactive oxygen species ; In vivo ; Hydrogen peroxide ; Radical ; Combinatorial chemistry ; Biochemistry ; Polymer ; Organic chemistry ; Enzyme Dendrimers and Hyperbranched Polymers ; Nanoplatforms for cancer theranostics ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Tao Jiang | Ying Wang | Kang Xu | Lixue Xiang | Bo Tang | Shanshan Shi | Xinfeng Wu | Wenge Li | Kai Sun | Runhua Fan | Jinhong Yu
Source: Composites Communications (article, 2023-03-16)
Field: Materials Science — Materials Chemistry

Highly thermally conductive and negative permittivity epoxy composites by constructing the carbon fiber/carbon networks Materials science ; Epoxy ; Composite material ; Thermal conductivity ; Composite number ; Electrical conductor ; Lamination ; Composite epoxy material Thermal properties of materials ; Advanced Sensor and Energy Harvesting Materials ; Thermal Radiation and Cooling Technologies
Authors: Weiwei Tang | Taimin Yang | Cristian A. Morales‐Rivera | Xi Geng | Vijay K. Srirambhatla | Xiang Kang | Vraj P. Chauhan | Sungil Hong | Qing Tu | Alastair J. Florence | Huaping Mo | H.A. Calderón | Christian Kisielowski | Francisco C. Robles Hernández | Xiaodong Zou | Giannis Mpourmpakis | Jeffrey D. Rimer
Source: Nature Communications (article, 2023-02-02)
Field: Materials Science — Materials Chemistry

Tautomerism unveils a self-inhibition mechanism of crystallization Modifiers are commonly used in natural, biological, and synthetic crystallization to tailor the growth of diverse materials. Here, we identify tautomers as a new class of modifiers where the dynamic interconversion between solute and its corresponding tautomer(s) produces native crystal growth inhibitors. The macroscopic and microscopic effects imposed by inhibitor-crystal interactions reveal dual mechanisms of inhibition where tautomer occlusion within crystals that leads to natural bending, tunes elastic modulus, and selectively alters the rate of crystal dissolution. Our study focuses on ammonium urate crystallization and shows that the keto-enol form of urate, which exists as a minor tautomer, is a potent inhibitor that nearly suppresses crystal growth at select solution alkalinity and supersaturation. The generalizability of this phenomenon is demonstrated for two additional tautomers with relevance to biological systems and pharmaceuticals. These findings offer potential routes in crystal engineering to strategically control the mechanical or physicochemical properties of tautomeric materials. Tautomer ; Mechanism (biology) ; Crystallization ; Chemistry ; Stereochemistry ; Physics ; Organic chemistry Crystallization and Solubility Studies ; Calcium Carbonate Crystallization and Inhibition ; Crystallography and molecular interactions
Authors: Xiaolei Guo | Yuan Ma | Hang Wang | Hongping Yin | Xinli Shi | Yiqin Chen | Guobiao Gao | Lei Sun | Jiadao Wang | Yunbing Wang | Daidi Fan
Source: Regenerative Biomaterials (article, 2023-11-29)
Field: Materials Science — Biomaterials

Status and developmental trends in recombinant collagen preparation technology Recombinant collagen is a pivotal topic in foundational biological research and epitomizes the application of critical bioengineering technologies. These technological advancements have profound implications across diverse areas such as regenerative medicine, organ replacement, tissue engineering, cosmetics and more. Thus, recombinant collagen and its preparation methodologies rooted in genetically engineered cells mark pivotal milestones in medical product research. This article provides a comprehensive overview of the current genetic engineering technologies and methods used in the production of recombinant collagen, as well as the conventional production process and quality control detection methods for this material. Furthermore, the discussion extends to foresee the strides in physical transfection and magnetic control sorting studies, envisioning an enhanced preparation of recombinant collagen-seeded cells to further fuel recombinant collagen production. Recombinant DNA ; Regenerative medicine ; Tissue engineering ; Biochemical engineering ; Biotechnology ; Nanotechnology ; Production (economics) ; Process (computing) ; Computer science ; Computational biology ; Engineering ; Biomedical engineering ; Chemistry ; Biology ; Cell biology ; Materials science ; Stem cell ; Biochemistry Collagen: Extraction and Characterization ; Periodontal Regeneration and Treatments ; Tissue Engineering and Regenerative Medicine
Authors: Muhammad Bilal | Ehsan Ullah Rashid | Junaid Munawar | Hafiz M.N. Iqbal | Jiandong Cui | Jakub Zdarta | S. M. Ashraf | Teofil Jesionowski
Source: International Journal of Biological Macromolecules (review, 2023-03-09)
Field: Materials Science — Materials Chemistry

Magnetic metal-organic frameworks immobilized enzyme-based nano-biocatalytic systems for sustainable biotechnology Biocatalysis ; Immobilized enzyme ; Nanotechnology ; Metal-organic framework ; Nano- ; Green chemistry ; Organic synthesis ; Materials science ; Chemistry ; Biochemical engineering ; Organic chemistry ; Enzyme ; Catalysis ; Molecule ; Supramolecular chemistry ; Engineering Advanced Nanomaterials in Catalysis ; Electrochemical sensors and biosensors ; Enzyme Catalysis and Immobilization
Authors: Nadim Munna | Rahim Abdur | Robiul Islam | Muhammad Shahriar Bashar | Syed Farid Uddin Farhad | Md. Kamruzzaman | Shahin Aziz | Md. Aftab Ali Shaikh | Mosharof Hossain | Mohammad Shah Jamal
Source: Nanoscale Advances (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Influence of Sn doping on the optoelectronic properties of ZnO nanoparticles Zinc Oxide (ZnO) nanoparticles (NPs) obtained a lot of attention from researchers and industries because of their superior properties as an optoelectronic material. Doping, especially tin (Sn), can further fine-tune their optoelectronic properties. In this manuscript, we have reported the optoelectronic properties of Sn-doped ZnO NPs, which were synthesized by a simple chemical solution method. A wide range of dopant (Sn) concentrations were used in the ratios of 0, 1, 3, 5, 7, and 10 weight percent. The effects of dopant (Sn) concentration on the structural, morphological, elemental composition, and optical properties of ZnO NPs were investigated by using an X-ray diffractometer (XRD), Field Emission Scanning Electron Microscope (FESEM), X-ray photoelectron spectrometer (XPS) and UV-Vis-NIR respectively. XRD analysis revealed the shifting of diffraction patterns towards a higher angle along with decreasing intensity. The calculated crystallite size using the XRD varied from 40.12 nm to 28.15 nm with an increasing doping percentage. Sn doping notably influences the size of ZnO NPs, along with crystal quality, strain, and dislocation density. The X-ray photoelectron spectroscopy (XPS) study showed the presence of zinc (Zn), oxygen (O), and tin (Sn) with their preferred oxidation states in the synthesized NPs. UV-Visible spectroscopy (UV-Vis) showed that the bandgap changed from 3.55 to 3.85 eV with the increasing concentration of Sn. FE-SEM revealed that the structures and surfaces were irregular and not homogeneous. The above findings for ZnO nanostructures show their potential application in optoelectronic devices. Doping ; Materials science ; Nanoparticle ; Optoelectronics ; Nanotechnology ZnO doping and properties ; Chalcogenide Semiconductor Thin Films ; Copper-based nanomaterials and applications
Authors: Ubaid Khan | Bowen Gao | Ling Bing Kong | Zhong Chen | Wenxiu Que
Source: Electrochimica Acta (article, 2023-12-07)
Field: Materials Science — Materials Chemistry

Green synthesis of fluorine-free MXene via hydrothermal process: A sustainable approach for proton supercapacitor electrodes Supercapacitor ; Hydrothermal circulation ; Fluorine ; Proton ; Electrode ; Hydrothermal synthesis ; Process (computing) ; Chemistry ; Materials science ; Chemical engineering ; Nanotechnology ; Electrochemistry ; Organic chemistry ; Computer science ; Engineering ; Physics ; Physical chemistry MXene and MAX Phase Materials ; Supercapacitor Materials and Fabrication ; Advanced Photocatalysis Techniques
Authors: Solomon Kebede Urge | Solomon Tiruneh Dibaba | Abebe Belay
Source: Journal of Nanomaterials (article, 2023-01-12)
Field: Materials Science — Materials Chemistry

Green Synthesis Method of ZnO Nanoparticles using Extracts of Zingiber officinale and Garlic Bulb (Allium sativum) and Their Synergetic Effect for Antibacterial Activities In this paper, antibacterial activities of zinc oxide (ZnO) nanoparticles synthesized through green method using garlic bulb (Allium sativum), ginger (Zingiber officinale) extracts, and their mixture are reported. The synthesized ZnO NPs were characterized by X-ray diffraction (XRD), ultraviolet visible (UV–vis), photoluminescence (PL), spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The crystalline sizes of ZnO NPs synthesized using garlic bulb (Allium sativum) extract, ginger (Zingiber officinale) root extract, and their mixture were 19.8, 21.94, and 23.86 nm, respectively. Similarly, the corresponding peak absorbances were 369.5, 377.5, and 374 nm, respectively. The antibacterial activities of synthesized ZnO NPs were tested against gram-negative bacteria Escherichia coli (E. coli) and Pseudomonas putida (P. putida) and gram-positive bacteria Staphylococcus aureus (S. aureus) and Streptococcus pyogenes (S. pyogenes). The ZnO NPs synthesized using the mixture of garlic bulb (Allium sativum) and ginger (Z. officinale) root extract have shown maximum inhibition zone against gram-negative bacteria (P. putida: 28.67 ± 0.82 mm) and gram-positive bacteria (S. pyogenes: 10.67 ± 0.47 mm) as compared to ZnO NPs synthesized using the two extracts separately. On the other hand, ZnO NPs obtained from garlic bulb and Z. officinale root extracts exhibited maximum inhibition zone against E. coli (19 ± 0.82 mm) and S. aureus (16.4 ± 0.47 mm), respectively. Allium sativum ; Bulb ; Zingiber officinale ; Antibacterial activity ; Allium ; Nuclear chemistry ; Allicin ; Food science ; Sativum ; Biology ; Bacteria ; Materials science ; Botany ; Traditional medicine ; Chemistry ; Medicine Nanoparticles: synthesis and applications ; Ginger and Zingiberaceae research
Authors: Yizhou Yang | Yanyan Chen | Fernando Izquierdo‐Ruiz | Clara Schäfer | Martin Rahm | Karl Börjesson
Source: Nature Communications (article, 2023-01-14)
Field: Materials Science — Materials Chemistry

A self-standing three-dimensional covalent organic framework film Covalent crystals such as diamonds are a class of fascinating materials that are challenging to fabricate in the form of thin films. This is because spatial kinetic control of bond formation is required to create covalently bonded crystal films. Directional crystal growth is commonly achieved by chemical vapor deposition, an approach that is hampered by technical complexity and associated high cost. Here we report on a liquid-liquid interfacial approach based on physical-organic considerations to synthesize an ultrathin covalent crystal film. By distributing reactants into separate phases using hydrophobicity, the chemical reaction is confined to an interface that orients the crystal growth. A molecular-smooth interface combined with in-plane isotropic conditions enables the synthesis of films on a centimeter size scale with a uniform thickness of 13 nm. The film exhibits considerable mechanical robustness enabling a free-standing length of 37 µm, as well as a clearly anisotropic chemical structure and crystal lattice alignment. Covalent bond ; Materials science ; Chemical vapor deposition ; Isotropy ; Crystal (programming language) ; Anisotropy ; Nanotechnology ; Chemical physics ; Thin film ; Chemical bond ; Chemical reaction ; Crystal growth ; Crystal structure ; Crystallography ; Chemistry ; Optics ; Organic chemistry ; Computer science ; Physics Covalent Organic Framework Applications ; Pickering emulsions and particle stabilization ; Luminescence and Fluorescent Materials
Authors: Lei Wang | Antonio R. Montaño | Jason R. Combs | Nathan McMahon | Allison Solanki | Michelle M. Gomes | Kai Tao | William H. Bisson | Dani A. Szafran | Kimberley S. Samkoe | Kenneth M. Tichauer | Summer L. Gibbs
Source: Nature Chemistry (article, 2023-03-30)
Field: Chemistry — Organic Chemistry

OregonFluor enables quantitative intracellular paired agent imaging to assess drug target availability in live cells and tissues Chemistry ; Fluorophore ; Cyanine ; Live cell imaging ; Membrane ; Rhodamine ; Small molecule ; Intracellular ; Biophysics ; Fluorescence ; Fluorescence-lifetime imaging microscopy ; Combinatorial chemistry ; Cell ; Nanotechnology ; Biochemistry Click Chemistry and Applications ; Advanced Fluorescence Microscopy Techniques ; Advanced biosensing and bioanalysis techniques
Authors: Qing Pei | Bowen Jiang | Dengyuan Hao | Zhigang Xie
Source: Acta Pharmaceutica Sinica B (review, 2023-03-05)
Field: Materials Science — Biomaterials

Self-assembled nanoformulations of paclitaxel for enhanced cancer theranostics Chemotherapy has occupied the critical position in cancer therapy, especially towards the post-operative, advanced, recurrent, and metastatic tumors. Paclitaxel (PTX)-based formulations have been widely used in clinical practice, while the therapeutic effect is far from satisfied due to off-target toxicity and drug resistance. The caseless multi-components make the preparation technology complicated and aggravate the concerns with the excipients-associated toxicity. The self-assembled PTX nanoparticles possess a high drug content and could incorporate various functional molecules for enhancing the therapeutic index. In this work, we summarize the self-assembly strategy for diverse nanodrugs of PTX. Then, the advancement of nanodrugs for tumor therapy, especially emphasis on mono-chemotherapy, combinational therapy, and theranostics, have been outlined. Finally, the challenges and potential improvements have been briefly spotlighted. Paclitaxel ; Cancer therapy ; Therapeutic index ; Drug ; Chemotherapy ; Medicine ; Cancer ; Pharmacology ; Nanotechnology ; Materials science ; Internal medicine Nanoparticle-Based Drug Delivery ; Nanoplatforms for cancer theranostics ; Graphene and Nanomaterials Applications
Authors: Md. Shahinul Islam | Mahfuza Mubarak | Ha-Jin Lee
Source: Inorganics (article, 2023-04-24)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Hybrid Nanostructured Materials as Electrodes in Energy Storage Devices The global demand for energy is constantly rising, and thus far, remarkable efforts have been put into developing high-performance energy storage devices using nanoscale designs and hybrid approaches. Hybrid nanostructured materials composed of transition metal oxides/hydroxides, metal chalcogenides, metal carbides, metal–organic frameworks, carbonaceous compounds and polymer-based porous materials have been used as electrodes for designing energy storage systems such as batteries, supercapacitors (SCs), and so on. Different kinds of hybrid materials have been shown to be ideal electrode materials for the development of efficient energy storage devices, due to their porous structures, high surface area, high electrical conductivity, charge accommodation capacity, and tunable electronic structures. These hybrid materials can be synthesized following various synthetic strategies, including intercalative hybridization, core–shell architecture, surface anchoring, and defect control, among others. In this study, we discuss applications of the various advanced hybrid nanostructured materials to design efficient batteries and SC-based energy storage systems. Moreover, we focus on their features, limitations, and real-time resolutions. Supercapacitor ; Materials science ; Energy storage ; Nanotechnology ; Electrode ; Hybrid material ; Porosity ; Capacitance ; Composite material Supercapacitor Materials and Fabrication ; Advanced battery technologies research ; Advancements in Battery Materials
Authors: Filip S. Meger | John A. Murphy
Source: Molecules (review, 2023-08-18)
Field: Chemistry — Organic Chemistry

Recent Advances in C–H Functionalisation through Indirect Hydrogen Atom Transfer The functionalisation of C-H bonds has been an enormous achievement in synthetic methodology, enabling new retrosynthetic disconnections and affording simple synthetic equivalents for synthons. Hydrogen atom transfer (HAT) is a key method for forming alkyl radicals from C-H substrates. Classic reactions, including the Barton nitrite ester reaction and Hofmann-Löffler-Freytag reaction, among others, provided early examples of HAT. However, recent developments in photoredox catalysis and electrochemistry have made HAT a powerful synthetic tool capable of introducing a wide range of functional groups into C-H bonds. Moreover, greater mechanistic insights into HAT have stimulated the development of increasingly site-selective protocols. Site-selectivity can be achieved through the tuning of electron density at certain C-H bonds using additives, a judicious choice of HAT reagent, and a solvent system. Herein, we describe the latest methods for functionalizing C-H/Si-H/Ge-H bonds using indirect HAT between 2018-2023, as well as a critical discussion of new HAT reagents, mechanistic aspects, substrate scopes, and background contexts of the protocols. Synthon ; Chemistry ; Retrosynthetic analysis ; Combinatorial chemistry ; Hydrogen atom ; Reagent ; Substrate (aquarium) ; Catalysis ; Electron transfer ; Organic synthesis ; Nanotechnology ; Alkyl ; Stereochemistry ; Photochemistry ; Organic chemistry ; Materials science ; Total synthesis Radical Photochemical Reactions ; Catalytic C–H Functionalization Methods ; Sulfur-Based Synthesis Techniques
Authors: Min Jun Oh | Seokyoung Yoon | Alaa Babeer | Yuan Liu | Zhi Ren | Zhenting Xiang | Yilan Miao | David P. Cormode | Chider Chen | Edward B. Steager | Hyun Koo
Source: Advanced Materials (article, 2023-05-04)
Field: Materials Science — Materials Chemistry

Nanozyme‐Based Robotics Approach for Targeting Fungal Infection Fungal pathogens have been designated by the World Health Organization as microbial threats of the highest priority for global health. It remains a major challenge to improve antifungal efficacy at the site of infection while avoiding off-target effects, fungal spreading, and drug tolerance. Here, a nanozyme-based microrobotic platform is developed that directs localized catalysis to the infection site with microscale precision to achieve targeted and rapid fungal killing. Using electromagnetic field frequency modulation and fine-scale spatiotemporal control, structured iron oxide nanozyme assemblies are formed that display tunable dynamic shape transformation and catalysis activation. The catalytic activity varies depending on the motion, velocity, and shape providing controllable reactive oxygen species (ROS) generation. Unexpectedly, nanozyme assemblies bind avidly to fungal (Candida albicans) surfaces to enable concentrated accumulation and targeted ROS-mediated killing in situ. By exploiting these tunable properties and selective binding to fungi, localized antifungal activity is achieved using in vivo-like cell spheroid and animal tissue infection models. Structured nanozyme assemblies are directed to Candida-infected sites using programmable algorithms to perform precisely guided spatial targeting and on-site catalysis resulting in fungal eradication within 10 min. This nanozyme-based microrobotics approach provides a uniquely effective and targeted therapeutic modality for pathogen elimination at the infection site. Robotics ; Materials science ; Nanotechnology ; Artificial intelligence ; Systems engineering ; Engineering ethics ; Robot ; Computer science ; Engineering Advanced Nanomaterials in Catalysis ; Nanoplatforms for cancer theranostics ; Advanced biosensing and bioanalysis techniques