jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Dipongkar Ray Sobuj | Tamanna Rashid | Sally A. Arif | Sasthi C. Ghosh
Source: American Journal of Scholarly Research and Innovation (article, 2024-08-03)
Field: Chemistry — Organic Chemistry

GOLD NANOPARTICLE–MEDIATED PLASMONIC BLOCK COPOLYMERS: DESIGN, SYNTHESIS, AND APPLICATIONS IN SMART DRUG DELIVERY The development of advanced drug delivery systems has become a central focus in biomedical engineering and pharmaceutical sciences, particularly with the integration of nanotechnology into polymeric platforms. In this study, we present the design, synthesis, and application of an asymmetric diblock copolymer mediated by plasmonic gold nanoparticles for controlled and stimuli-responsive drug delivery. The system leverages the unique physicochemical properties of gold nanoparticles, including surface plasmon resonance, biocompatibility, and tunable optical activity, in conjunction with the self-assembly behavior of amphiphilic block copolymers. The copolymer is composed of hydrophilic and hydrophobic segments, strategically engineered to facilitate micelle formation in aqueous environments, where the hydrophobic core serves as a reservoir for poorly soluble therapeutic molecules. The incorporation of plasmonic gold nanoparticles into the polymer backbone introduces multifunctional responsiveness to external stimuli. Specifically, near-infrared (NIR) light irradiation induces localized heating via plasmonic resonance, resulting in the destabilization and disruption of the micellar architecture. This process enables the controlled release of hydrophobic drugs encapsulated in the micelle interior. The synthetic design of the diblock copolymer was optimized to balance stability in circulation with responsiveness upon exposure to external triggers. Structural characterization confirmed successful conjugation of the polymeric segments with gold nanoparticles, while self-assembly studies revealed stable micelle formation under physiological conditions. Drug encapsulation efficiency was evaluated using hydrophobic model compounds, and release kinetics demonstrated significant responsiveness to NIR irradiation, confirming the role of plasmonic resonance in micelle destabilization. Preliminary cytocompatibility studies suggest that the hybrid system maintains biocompatibility, underscoring its potential in translational applications. The findings lay the groundwork for further exploration of plasmonic block copolymers in areas such as targeted cancer therapy, photothermal treatment, and multimodal therapeutic strategies. Future investigations may focus on in vivo pharmacokinetics, biodistribution, and therapeutic efficacy to validate the clinical potential of this system. Drug delivery ; Nanotechnology ; Copolymer ; Nanoparticle ; Colloidal gold ; Materials science ; Plasmon ; Drug ; Smart polymer ; Polymer ; Medicine ; Optoelectronics ; Pharmacology Nanomaterials for catalytic reactions ; Nanoparticle-Based Drug Delivery ; Gold and Silver Nanoparticles Synthesis and Applications
Authors: Swati Sharma
Source: Indian Journal of Chemistry (article, 2024-09-24)
Field: Materials Science — Polymers and Plastics

The Structural and Electronic Properties of FeO-decorated Polythiophene-Poly 3-methylpyrrole Composite Copolymer: DFT Study The current study investigated the structure and electronic properties of the FeO-decorated polythiophene-poly 3-methylpyrrole composite copolymer using a density functional theory-based ab initio approach. The synthesized composite copolymer has a high stability with a binding energy of -5.2 eV compared to polythiophene-poly 3-methylpyrrole copolymer. The synthesized copolymer exhibits a 58.5% reduction in bandgap due to the formation of composite with FeO, and conductivity increased. The structural and electronics properties of FeO decorated polythiophene-poly 3-methylpyrrole composite copolymer are analysis via electron density, Density of states, HOMO-LUMO gap, and Mulliken population. The enhanced conductivity and stability of the FeO-decorated composite copolymer make it a promising candidate for various applications, including polymeric sensors, energy storage, photovoltaic and electronics devices. Polythiophene ; Copolymer ; Materials science ; Composite number ; Polymer chemistry ; Chemical engineering ; Polymer ; Conductive polymer ; Composite material Conducting polymers and applications
Authors: Yi Li
Source: Science and Technology of Engineering Chemistry and Environmental Protection (article, 2024-12-31)
Field: Materials Science — Materials Chemistry

Research Progress of MXene/graphene Composites in the Application of Electronic Information Field The rapid development of electronic information technology has resulted in an increased demand for high-performance electronic materials. Research has focused on MXene/graphene composites due to their exceptional electrical conductivity, mechanical strength, and thermal stability. This paper presents a comprehensive review of the latest research progress in the field of electronic information, with a particular focus on MXene/graphene composites. It provides a detailed analysis of the applications of MXene/graphene composites in key technological areas, including energy storage and conversion, electronic devices, and optoelectronic devices. Additionally, it identifies the current technological challenges and explores potential future developments in this field. It is anticipated that by optimizing the preparation process of the composites and exploring new application areas, MXene/graphene composites will achieve breakthroughs in the fields of flexible electronics, smart sensors, and high-efficiency energy storage. These advancements are anticipated to catalyze a transformative impact on the electronics and information sector, marking a significant leap forward in technological evolution. Graphene ; Electronics ; Materials science ; Nanotechnology ; Energy storage ; Field (mathematics) ; Transformative learning ; Mechanical engineering ; Engineering physics ; Engineering ; Electrical engineering ; Physics MXene and MAX Phase Materials ; Advanced Memory and Neural Computing ; Graphene research and applications
Source: Texila international journal of public health (article, 2024-12-10)
Field: Materials Science — Materials Chemistry

Hydrothermal Method of Synthesis of β-Ag2MoO4 Nanorods as a Peroxidase Mimetic for Glucose Sensing In this study, -AgMoO nanorods were synthesized using a hydrothermal method, aiming to explore their potential as a sensing material for L-glucose detection.The synthesis process was optimized to produce uniform nanorods with high crystallinity and surface area, which is essential for enhancing sensor performance.The synthesized -Ag2MoO4 nanorods characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), confirmed the successful formation of -AgMoO nanorods with desired morphological features.The vibrations existing in -Ag2MoO4 nanorods were characterized by FT-IR and Raman spectroscopic studies.The electrochemical properties of the nanorods were evaluated, demonstrating their sensitivity and selectivity towards L-glucose.The nanorods exhibited a rapid response time, low detection limit, and excellent reproducibility, making them promising candidates for glucose sensors.This work underscores the potential of hydrothermally synthesized -AgMoO nanorods in the development of advanced glucose sensing platforms, offering a new approach for the efficient and reliable monitoring of glucose levels in medical diagnostics. Peroxidase ; Nanorod ; Hydrothermal circulation ; Chemistry ; Nanotechnology ; Biochemistry ; Materials science ; Chemical engineering ; Enzyme ; Engineering Advanced Nanomaterials in Catalysis ; Electrochemical sensors and biosensors ; Nanocluster Synthesis and Applications
Authors: Aswin Gopakumar | Manuel Á. Ortuño | Julio Lloret‐Fillol
Source: ChemCatChem (article, 2024-06-03)
Field: Materials Science — Materials Chemistry

Reaction Mechanisms of Single Metal Site Catalysts Supported on Covalent Organic Frameworks Abstract Covalent organic frameworks (COFs) have become a versatile platform to immobilize a wide variety of single‐atom metal catalysts. The resulting post‐synthetic modified materials present a spectrum of valuable properties ranging from homogeneous to heterogeneous systems, such as well‐defined catalytic sites, selectivity, recyclability, and stability. In this minireview, we discuss selected contributions that provide experimental and computational details on reaction mechanisms (e. g., via EXAFS, TEM, and DFT) catalyzed by single‐atom metals embedded within the COF structure. When applicable, we highlight the different behaviour between molecular (homogeneous) and COF‐supported (heterogeneous) sites regarding catalytic performance. With this survey, we aim to decipher the key features that aid in seeing COFs as not merely passive supports but as active items in catalysis. Metal-organic framework ; Catalysis ; Covalent bond ; Chemistry ; Metal ; Nanotechnology ; Materials science ; Organic chemistry Covalent Organic Framework Applications ; Catalytic Processes in Materials Science ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Fitri Handayani Hamid | Fathur Rizqa Rasyid | Mashuni Mashuni | La Ode Ahmad | M. Jahiding
Source: Research Square (preprint, 2024-12-11)
Field: Materials Science — Materials Chemistry

Enhanced rGO/ZnO/Chitosan Nanozyme Photocatalytic Technology for Efficient Degradation of Diazinon Pesticide Contaminated Water Diazinon ; Adsorption ; Chemistry ; Environmental chemistry ; Pesticide ; Freundlich equation ; Photocatalysis ; Chitosan ; Graphene ; Oxide ; Environmental remediation ; Degradation (telecommunications) ; Langmuir ; Water treatment ; Contamination ; Chemical engineering ; Materials science ; Environmental engineering ; Nanotechnology ; Environmental science ; Organic chemistry ; Catalysis Advanced Nanomaterials in Catalysis ; Electrochemical sensors and biosensors ; Carbon and Quantum Dots Applications
Authors: Nuno Ferreira | Céu M. Sousa | Paulo J. Coelho
Source: Journal of Heterocyclic Chemistry (article, 2024-12-10)
Field: Materials Science — Materials Chemistry

Synthesis of Photochromic Lactone‐Fused Naphthopyrans With Extended Visible Light Absorption ABSTRACT The synthesis of new photochromic lactone‐fused naphthopyrans substituted with arylethenyl groups is discussed. Brief exposure of solutions of these colorless compounds to the UV light results in the generation of intense hues, which spontaneously return to the uncolored state within seconds after removing the light source. As anticipated, introducing the ethenyl bonds caused a bathochromic shift in the absorption spectrum of the opened colored photoisomers, however, due to non‐uniform absorption across the visible spectrum, the perceived color ranged from red to brownish‐red. Chemistry ; Photochromism ; Absorption (acoustics) ; Photochemistry ; Lactone ; Visible spectrum ; Combinatorial chemistry ; Organic chemistry ; Optics Photochromic and Fluorescence Chemistry ; Porphyrin and Phthalocyanine Chemistry ; Synthesis of Indole Derivatives
Authors: Fatemeh Sharifjafari | Darya Nejadkoorki | Sogand Bahadori | Rania Dadi
Source: Journal of Composites and Compounds (article, 2024-09-15)
Field: Materials Science — Biomaterials

Biomedical Applications of Silica Nanoparticle Compounds Silica nanoparticles (SiNPs) consist primarily of silicon dioxide and has many qualities, such as selectable particle size, high surface area, and good biocompatibility that make them ideal for additional biomedical usage. SiNPs are becoming increasingly popular amongst researchers for their ability to retain thermal stability and exist in a variety of platforms, such as chromatography, medicine and optics. Advances and growth in the area of nanobiotechnology have alluded to both function and modification of SiNPs through their surface and as structures. One of the most promising uses of SiNPs is the development of therapeutics to target disease like cancer, respiratory and cardiovascular diseases. One of the additional benefits of SiNPs are the ability to also function as carriers of imaging agents, for enhancing medical imaging and imaging modalities like fluorescent imaging, and possibly imagers of the future for early detection of cancer. Mesoporous silica nanoparticles (MSNs) are a subclass of SiNPs, developed to provide controlled drug release with optimal cellular selectivity. What this research highlights are the versatility of SiNPs as applications and devices in modern biomedicine science approaches. Biocompatibility ; Nanobiotechnology ; Mesoporous silica ; Nanoparticle ; Biomedicine ; Nanomedicine Diatoms and Algae Research ; Graphene and Nanomaterials Applications ; Mesoporous Materials and Catalysis
Authors: Takashi Yokokura | Chao Duan | Rui Wang
Source: arXiv (Cornell University) (preprint, 2024-07-31)
Field: Materials Science — Surfaces, Coatings and Films

Microphase Segregation in Polyelectrolyte Brushes Polyelectrolyte (PE) brushes have ubiquitous applications as surface modifiers which regulate various structural and dynamic properties. Here, we apply a continuous-space self-consistent field theory to study the structural heterogeneity in PE brushes induced by competing electrostatic and hydrophobic interactions. For brushes with high grafting densities, we find a series of microphase-segregated morphologies with alternating polymer-rich and polymer-poor layers in the direction normal to the substrate. The transitions between multi-layer morphologies with consecutive numbers of condensed layers as well as the melting transition to the fully swollen brush are all discontinuous. We also elucidate that the segregated layers are formed by different subpopulations of all chains, significantly different from the scenario of the pearl-necklace structure formed by a single PE in poor solvents. Furthermore, we bridge the microstructure of multi-layer brushes to experimentally measurable reflectivity spectra, where the oscillation period and amplitude in the spectra are shown to be very sensitive to the number of layers and the sharpness of the polymer-solvent interface. The multi-layer morphology predicted by our theory is in good agreement with the lamellae structure experimentally observed at hydrated Nafion film interfaces. Polyelectrolyte ; Materials science ; Polymer science ; Composite material ; Polymer Polymer Surface Interaction Studies ; Electrostatics and Colloid Interactions ; Hydrogels: synthesis, properties, applications
Authors: Tao Zhang | Fengxue Liu | Yongxin Liu | Kaixiu Li | Zhengguang Li | Yaqin Li | Fan Fu | Mingliang Liu | Yiming Li | Die Liu | Pingshan Wang
Source: Polymers (article, 2024-12-31)
Field: Materials Science — Materials Chemistry

Fluorescent Polymers via Coordination of bis-Terpyridine Ligands with Transition Metals and Their pH Response Properties Stimulus-responsive luminescent materials are pivotal in the field of sensing. Fluorescent transition metal complexes with a charge transfer excited state, especially terpyridine-coordinated polymers, are of particular interest due to their tunable emission. In this paper, a novel bis-terpyridine ligand was synthesized and assembled into a coordination polymer, which showed intense visible light absorption and fluorescence emission in the solid state that could be regulated by an acidic or basic pH. After being protonated by acid, the fluorescence of the polymer <b>P2</b> was quenched. The emission of the polymer split from 635 nm to two peaks of 674 and 440 nm, and then stabilized at 728 nm for 7 days, which showed a significant red-shift and good protonation stability. The fluorescence emission wavelength of the protonated polymers recovered after alkalization, and the fluorescence intensity of the polymer was greatly improved after alkalization, showing interesting acid-base-response luminescence characteristics. The sensitive response of the synthesized coordination polymers to acids and bases will contribute to expanding the application of linear coordination polymers in sensing and other fields. Protonation ; Terpyridine ; Fluorescence ; Polymer ; Photochemistry ; Luminescence ; Ligand (biochemistry) ; Excited state ; Quantum yield ; Chemistry ; Materials science ; Metal ; Polymer chemistry ; Organic chemistry ; Ion Luminescence and Fluorescent Materials ; Molecular Sensors and Ion Detection ; Metal-Organic Frameworks: Synthesis and Applications
Authors: Vlad Tarpa | Jean‐François Longevial | Michel Giorgi | Gabriel Canard | Simon Pascal | Denis Jacquemin | Olivier Siri
Source: The Journal of Organic Chemistry (article, 2024-12-31)
Field: Chemistry — Organic Chemistry

Transamination of Zwitterionic Quinones with Polyamines: The Carbon Bridge Matters The one-pot transamination reactions on a zwitterionic benzoquinonemonoimine yield either a quinoxaline derivative or bis-zwitterionic macrocycles, depending on the number of carbon atoms bridging primary polyamines. These latter products, featuring two confined donor cavities, are the result of a [2 + 2] condensation without the need for template effect or high dilution conditions. Transamination ; Quinoxaline ; Chemistry ; Yield (engineering) ; Derivative (finance) ; Primary (astronomy) ; Dilution ; Carbon fibers ; Condensation ; Organic chemistry ; Materials science Synthesis and Biological Evaluation ; Porphyrin and Phthalocyanine Chemistry ; Bioactive Compounds and Antitumor Agents
Authors: Sachin Goyal | Deepika Sharma | Kamlesh Kumar
Source: Research Square (preprint, 2024-02-22)
Field: Chemistry — Organic Chemistry

Low-temperature Irreversible Thermochromic Indicator Based on Functional Polydiacetylene for Food Storage Applications Abstract Thermochromic materials are of great interest because of their color transition characteristic as a function of temperature, and this property may find potential applications as a temperature indicator. Irreversible thermochromic materials that display color change at low temperatures can be utilized as a temperature indicator to ensure the safety and quality of deep-frozen products during storage and transportation. In this work, we have successfully prepared a novel colorimetric sensor based on a functionalized polydiacetylene dye. In order to achieve thermochromic transition of different temperature ranges, pentacosadiynoic acid (PC) was functionalized with ethylene glycol monomethylether (EGME), diethylene glycol monomethyl ether (DGME) and triethylene glycol monomethyl ether (TGME), resulting the formation of ester head groups. Photopolymerization of the synthesized diacetylene dyes was carried out to convert the monomers of the dyes into polymers. The Fourier transform infrared spectroscopy (FTIR), Nuclear magnetic resonance (NMR), and Raman spectroscopy were used to characterize the synthesized product. The absorption spectroscopy and optical images study revealed that the functionalized dyes underwent irreversible thermochromic transition when exposed to freezing temperatures. This property of irreversible color transition can make them a reliable indicator of temperature change. The functional dye was incorporated into a polymer film to apply directly on deep freeze products as a polymer strip and when the temperature increases upon freezing level, the color of the thermochromic strip changes which can provide a visual warning to the consumers and manufacturers. Thermochromism ; Materials science ; Environmental science ; Computer science ; Nanotechnology ; Chemistry Polydiacetylene-based materials and applications ; Ocular Surface and Contact Lens ; Antimicrobial Peptides and Activities
Authors: Alex W. J. Bowles | Yu Liu | Matthew P. Stevens | Fabrizio Ortu
Source: Inorganic Chemistry (article, 2024-11-06)
Field: Chemistry — Organic Chemistry

Heavy Alkaline Earth Cyclic (Alkyl)(Amino)Carbene Complexes Supported by Aryl–Silyl Amides A series of 8 trigonal planar, heavy alkaline earth (AE = Ca-Ba) metal complexes containing cyclic (alkyl)(amino)carbene (CAAC) ligands were prepared from AE bis(amide) species. Complexation can be achieved by first generating the free carbene <i>in situ</i> or by direct addition of the free carbene, with the former route giving rise to unexpected mixed-amide AE complexes. The frontier molecular orbitals of the highly equatorial, 3-coordinate AE-CAAC species were also probed computationally, revealing the lowest unoccupied molecular orbital (LUMO) consisting predominantly of the π* system located on the carbene ligand. Chemistry ; Carbene ; Silylation ; Alkyl ; Aryl ; Alkaline earth metal ; Medicinal chemistry ; Organic chemistry ; Alkali metal ; Catalysis N-Heterocyclic Carbenes in Organic and Inorganic Chemistry ; Coordination Chemistry and Organometallics ; Catalytic Cross-Coupling Reactions
Authors: Ihor Skrypnyk | Stepan Nichkalo | Nazar Shtangret
Source: Physics and Chemistry of Solid State (article, 2024-12-15)
Field: Materials Science — Materials Chemistry

The effect of clustering of Si nanowires produced by the metal-assisted chemical etching method on their anti-reflecting properties Silicon nanowires are valuable for their compatibility with silicon technology and unique properties. Using metal-assisted chemical etching, we produced silicon nanowires and studied the effects of clustering, roughness, and length on wetting. Hydrophobicity depends on silicon nanowires clustering, which is influenced by length. The highest contact angle (~95º) was for 8.5-μm long nanowires. Below 8 μm, minimal clustering promotes wetting, while longer nanowires form larger clusters and hydrophobic surfaces. The Cassie–Baxter model applies initially, transitioning to the Wenzel model over time. Adjusting surface morphology can improve anti-reflective properties. Metal-assisted chemical etching offers control over the silicon nanowires’ length and wettability, benefiting silicon-based device development. Nanowire ; Etching (microfabrication) ; Isotropic etching ; Materials science ; Metal ; Nanotechnology ; Cluster analysis ; Chemical engineering ; Metallurgy ; Computer science ; Engineering ; Artificial intelligence ; Layer (electronics) Silicon Nanostructures and Photoluminescence ; Nanowire Synthesis and Applications ; Anodic Oxide Films and Nanostructures
Authors: Mansi Sharma | Priyanka Mahajan
Source: Zastita materijala (article, 2024-10-21)
Field: Materials Science — Biomaterials

Nature’s prescription: decoding the power of biopolymers in medical and pharmaceutical applications Over the past few years, the utilization of several biopolymers of natural, synthetic or microbial origin has witnessed a peak in various medical and pharmaceutical applications, like drug delivery, drug formulation, tissue engineering scaffolds, medical implants (e.g., prosthetics, stents), wound healing and dressing materials, and biosensing. This is mainly attributed to their ease of processing, biodegradability, high bioactivity, and biocompatibility compared to synthetic polymers. Moreover, a surge in the development of bio-/nanocomposites has emerged, with an aim to enhance the inherent properties of raw biopolymers derived from natural/microbial sources. This review mainly focuses on the different types of biopolymers or their composites utilized in medicinal or pharmaceutical industries and sheds light on the key advantages and limitations associated with their synthesis or use. Furthermore, the article presents a list of commercialized biopolymer composites with a discussion on the future scope of using these “gifts of nature” in the medical field. Medical prescription ; Power (physics) ; Decoding methods ; Computer science ; Medicine ; Pharmacology ; Telecommunications ; Physics ; Thermodynamics biodegradable polymer synthesis and properties ; Electrospun Nanofibers in Biomedical Applications ; Natural Fiber Reinforced Composites