jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Pradip Pattanayak | Bishes Ray | Abhijit Chatterjee | Pradipta Purkayastha
Source: Small (article, 2025-12-30)
Field: Materials Science — Materials Chemistry

Unlocking Color‐Tunable Pyrene Emissions: Polymorph Engineering and Two‐Photon Excited Charge‐Transfer Cocrystals We present a polymorph-based design strategy to modulate the excimer emission in pyrene derivatives by controlling their crystal packing. A simple pyrene molecule, functionalized with an alcohol group, exhibits strikingly different photoluminescence quantum yield (PLQY) depending on its solid-state arrangement. A co-facial π-π stacked polymorph achieves an impressive PLQY of 88%, while an orthogonally packed form shows a much lower efficiency of 14%. Leveraging the intrinsic photophysical richness of the pyrene core, we further construct color-tunable charge transfer (CT) cocrystals by pairing pyrene donors with various electron-accepting moieties. These cocrystals display high emission efficiencies across the visible to near-infrared (NIR) spectrum, enabled by efficient CT interactions and mixed stacking geometries. Notably, emission can be extended into the NIR region by inducing radical formation in the acceptor components. This work highlights the power of crystal engineering in polycyclic aromatic hydrocarbons (PAHs) to create highly emissive materials and offers new prospects for their application in advanced optoelectronic devices, including efficient two-photon emitters. Pyrene ; Stacking ; Crystal engineering ; Excimer ; Photoluminescence ; Quantum yield ; Excited state ; Acceptor Luminescence and Fluorescent Materials ; Synthesis and Properties of Aromatic Compounds ; Crystallography and molecular interactions
Authors: Emre Palabıyık | Emre Tekay
Source: Polymers for Advanced Technologies (article, 2025-05-01)
Field: Materials Science — Polymers and Plastics

Design and Characterization of <scp>TPU</scp> and Methacrylic Polymer Blends for Heat Triggered Shape Memory Applications ABSTRACT In this study, blends of thermally‐activated shape memory polymers were created by merging ester‐based thermoplastic polyurethane (TPU) as the permanent elastomer phase with methacrylate‐based poly(butyl methacrylate‐co‐isobutyl methacrylate) (BM) serving as the switching phase. The blends were created using a melt blending technique, and their morphology, thermal characteristics, mechanical properties, and shape memory capabilities were examined. Scanning electron microscopy (SEM) revealed phase‐separated morphologies, with a transition from small spheres to co‐continuous phases as the BM content increased. A co‐continuous structure was achieved for TPU/BM ratios of 60/40 and 50/50. Dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) revealed that incorporating BM modified the glass transition and melting temperatures of the TPU phases, leading to notable changes in the thermal properties and phase compatibility of the material. Fourier transform infrared (FTIR) analysis indicated new interactions between the hard segments of TPU and the BM polymer, influencing the blend's phase separation. In the thermogravimetric analyses, the onset degradation temperatures were found to lie between the values of the two polymers, while the maximum degradation temperature of the BM phase increased in the presence of TPU. Shape memory performance was assessed by thermomechanical analysis (TMA), with results showing improved shape fixing and recovery ratios as BM content increased. The 50TPU‐50BM blend exhibited the highest shape recovery (98.91%) and shape fixing (98.68%) ratios, demonstrating excellent thermo‐responsive behavior. This work highlights the potential of TPU/BM blends for smart shape memory applications. Materials science ; Characterization (materials science) ; Composite material ; Shape-memory polymer ; Poly(methacrylic acid) ; Chemical engineering ; Polymer ; Methacrylic acid ; Nanotechnology ; Copolymer Polymer composites and self-healing ; Photochromic and Fluorescence Chemistry ; Photopolymerization techniques and applications
Authors: Irem Kılınç
Source: Food Nutrition Chemistry (article, 2025-05-28)
Field: Materials Science — Materials Chemistry

Pickering emulsion technology: An overview of stability and functionality in food processing Emulsions stabilized by solid particles, known as Pickering emulsions, offer a compelling alternative to conventional surfactant-based emulsions, attracting considerable interest within the food sector. This review comprehensively examines the application of solid particles in stabilizing food emulsions, offering a detailed comparison with traditional surfactant-based methods. Additionally, this paper elucidates how Pickering emulsions, stabilized by particles at the oil-water interface, achieve superior stability, preventing coalescence and phase separation, which is crucial for extending the shelf life of food products. It further explores the enhanced functionality these emulsions provide, including improved nutrient delivery through encapsulation, where sensitive compounds are protected and released in a controlled manner. Moreover, the review delves into innovative applications such as the development of low-fat food alternatives, where Pickering emulsions maintain sensory qualities while reducing lipid content, and their role in enabling advanced food technologies like 3D printing, allowing for tailored food structures and nutritional profiles. By elucidating the mechanisms of particle stabilization and exploring diverse applications, this paper underscores the significant potential of Pickering emulsion technology in transforming food processing and product development. Pickering emulsion ; Emulsion ; Food processing ; Process engineering ; Computer science ; Materials science ; Manufacturing engineering ; Chemical engineering ; Engineering ; Food science ; Chemistry Pickering emulsions and particle stabilization ; Proteins in Food Systems ; Polysaccharides Composition and Applications
Authors: Li Chen | S.M. Yu | Xin Wang | Zhongliao Wang
Source: Catalysts (article, 2025-09-04)
Field: Materials Science — Materials Chemistry

Density Functional Theory Study in Photocatalytic Water Splitting via Covalent Triazine Frameworks Functioned by Benzothiophene Sulfone Photocatalytic overall water splitting (PWS) offers a green, economical, and sustainable pathway for hydrogen production. However, the efficiency is still hindered by severe charge recombination in catalysts, high energy barriers for water oxidation, and sluggish reaction kinetics. Therefore, it is crucial to address these challenges by enhancing charge separation efficiency, accelerating reaction kinetics, and lowering PWS energy barriers. In this work, we constructed donor–acceptor covalent triazine-based organic frameworks (CTFs), such as CTF-BP, CTF-DBT, and CTF-DBTS, using biphenyl (BP), benzothiophene (DBT), and benzothiophene sulfone (DBTS) as basic units, respectively. DFT calculations revealed that all three CTFs exhibit comparable bandgaps with strong visible-light absorption. Notably, strong dipole moments between donor and acceptor units were observed within these frameworks, effectively promoting in-plane charge separation. DBT and DBTS derivatives generated stronger dipole moments compared to biphenyl. Furthermore, hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) pathway analyses demonstrated that CTF-DBTS substantially reduces energy barriers for both half-reactions relative to CTF-DBT and CTF-BP, exhibiting the most promising potential for PWS. This work provides a reference for the application of DBTS-incorporated COFs in PWS systems. Triazine ; Benzothiophene ; Density functional theory ; Photocatalysis ; Sulfone ; Chemistry ; Materials science ; Computational chemistry ; Organic chemistry ; Catalysis ; Thiophene Covalent Organic Framework Applications ; Advanced Photocatalysis Techniques ; Caching and Content Delivery
Authors: Israel Ortiz‐Anaya | Seiji Obata | Yuta Nishina
Source: Journal of Colloid and Interface Science (article, 2025-05-04)
Field: Materials Science — Materials Chemistry

Tunable interlayer distance in graphene oxide through alkylamine surface coverage and chain length Layered materials have unique structures that can be modified by adjusting the space between layers through pillaring or surface functionalization. Unlike typical crystalline layered materials, graphene oxide (GO) possesses reactive oxygenated functional groups, which lead to spontaneous reduction and stacking upon thermal treatment. Here, we investigated the functionalization of GO with different amounts of hexylamine to control the degree of surface coverage. Furthermore, octylamine and dodecylamine were employed to confirm the effect of the alkyl chain length on the interlayer distance of the resultant GO derivatives. Subsequent thermal treatment produced reduced GO (rGO) functionalized with alkylamines, demonstrating the retention of the interlayer distance. Additionally, amine-functionalized rGOs exhibited varying porous structures. Graphene ; Oxide ; Chain (unit) ; Surface (topology) ; Materials science ; Nanotechnology ; Graphene oxide paper ; Chemical engineering ; Chemistry ; Physics ; Organic chemistry ; Mathematics ; Geometry ; Quantum mechanics Graphene research and applications ; Graphene and Nanomaterials Applications ; 2D Materials and Applications
Authors: Satoshi Horikoshi | Tomohiko Mitani | Nick Serpone
Source: Molecules (article, 2025-01-28)
Field: Chemistry — Organic Chemistry

Exploring Efficient and Energy-Saving Microwave Chemical and Material Processes Using Amplitude-Modulated Waves: Pd-Catalyzed Reaction and Ag Nanoparticle Synthesis This study investigated the impact of a 10 kHz amplitude-modulation (AM) wave from a semiconductor microwave generator on the heating of ultrapure water and electrolyte aqueous solutions containing NaCl. It also examined the effects of AM waves on the yields of 4-methylbiphenyl (4-MBP) in the heterogeneous Suzuki-Miyaura coupling reaction, which was conducted in the presence of palladium nanoparticles supported on activated carbon (Pd/AC), as well as their influence on the growth rate during silver nanoparticle synthesis. Applying AM waves, typically used in telecommunications, enhanced heating efficiencies and improved product yields in both the chemical reaction and nanoparticle growth. Irradiating with microwaves under AM conditions allowed it to reduce power output while still achieving target yields and growth rates, even at the same temperatures without AM. This indicates the potential for highly efficient and energy-saving microwave processes in chemical reactions and material synthesis. Microwave ; Nanoparticle ; Catalysis ; Ultrapure water ; Materials science ; Chemical reaction ; Chemical synthesis ; Chemical energy ; Chemical engineering ; Aqueous solution ; Microwave chemistry ; Nanotechnology ; Chemistry ; Organic chemistry ; Microwave irradiation Microwave-Assisted Synthesis and Applications
Authors: Charlène Brissaud | Wajdi Chaâbani | Jesús Giráldez‐Martínez | Meyssa Mockbel | Eva Yazmin Santiago | Jaime Gabriel Trazo | Rahul Nag | Stéphanie Lau‐Truong | Gaëlle Blond | Marco Faustini | Cyrille Hamon | Lucas V. Besteiro | Jean‐Yves Piquemal | Miguel Comesaña‐Hermo
Source: Small Structures (article, 2025-10-12)
Field: Materials Science — Materials Chemistry

Faceted 3D Supercrystals for Plasmonic Photocatalysis: Design, Reactivity, and Operando Studies Solar‐driven plasmonic photocatalysis has emerged as a powerful tool to enhance chemical reactivity, improving the efficiency and selectivity in a large number of transformations. Plasmonic nanoparticles are often implemented in photocatalysis as colloidal dispersions but they face issues related to the reduced photoactivation of the metallic surface in concentrated solutions and poor long‐term colloidal stability. To overcome these limitations, 3D plasmonic supercrystals (SCs) created through the depletion‐ and evaporation‐induced self‐assembly of metal nanoparticles as novel heterogeneous plasmonic photocatalysts are introduced. They present large electromagnetic field enhancements associated to the formation of regular arrays of plasmonic hot spots, leading to improved chemical reactivities through the generation of hot charge carriers. To demonstrate this, two challenging organic transformations are chosen, an oxidative polymerization and different CC cross‐coupling reactions, that can be activated by modifying the chemical composition of the assemblies. The anisotropic shapes of the building blocks lead to the formation of 3D SCs exposing different surfaces. Importantly, by performing operando surface‐enhanced Raman spectroscopy at the single SC level, the surface‐dependent reactivity of each individual plasmonic superstructure is unveiled. The combined experimental and theoretical approach provides with key insights into structure‐function correlations and offers guidelines for the rational design of versatile SC photocatalysts. Plasmon ; Plasmonic nanoparticles ; Photocatalysis ; Nanoparticle ; Raman spectroscopy ; Nanomaterials Copper-based nanomaterials and applications ; Gold and Silver Nanoparticles Synthesis and Applications ; Quantum Dots Synthesis And Properties
Authors: Seelam Pichi Reddy | Yellapragada Naga Venkata Sairam | Mohammad Hasheer Shaik | Pushpendra Kumar | Tammineni Yamini | Medikonduru Maithili Saisree | N. Janardhana Raju
Source: Annales de Chimie Science des Matériaux (article, 2025-02-28)
Field: Chemistry — Inorganic Chemistry

Preparation and Experimental Investigation of Lanthanum Hexa-Aluminate Calcinated Powders Lanthanum hexa-aluminate (LHA) has garnered significant attention as a highperformance material for thermal barrier coating (TBC) applications, primarily due to its exceptional thermal stability, low thermal conductivity, and resistance to hightemperature degradation.However, LHA's ability to retain its structural integrity under these extreme conditions.The goals of this work are to synthesize and characterize three different compositions of Alumina/Lanthanum hexa-aluminate (Alumina/LHA) ceramic powders.The synthesis process was carried out using chemical precipitation followed by filtration process.After synthesis, the ceramic powders were calcinated.The calcination was carried out at three different temperatures: 750, 900, and 1000 for each sample.This thermal treatment enabled the researchers to study the evolution of the material's crystalline structure as a function of temperature and composition.X-ray diffraction (XRD) peak profile analysis was performed to determine phase transformations and investigate the crystallographic properties of the powders for changes induced by calcination.Field emission scanning electron microscopy (FESEM) was used to study the microstructure, while energy-dispersive X-ray spectroscopy (EDX) was performed to analyze elemental composition and distribution in the samples. HEXA ; Lanthanum ; Aluminate ; Materials science ; Metallurgy ; Chemistry ; Inorganic chemistry ; Crystallography Pigment Synthesis and Properties
Authors: Lorenzo Branzi | Joseph Martyn | Lucy Fitzsimmons | Yurii K. Gun’ko
Source: Chemistry - A European Journal (review, 2025-05-13)
Field: Materials Science — Materials Chemistry

Chirality in Transition Metal Dichalcogenide Nanostructures The fascinating properties introduced by the breaking of mirror symmetry have recently motivated a rising interest in chirality in nanomaterials. In particular, transition metal (TM) dichalcogenides (TMDs) are a wide group of technologically relevant 2D layered materials where recent efforts in the introduction of chirality have shown promising results, attracting great attention for future studies and potential applications. This review article is focused on the development of chirality in TM dichalcogenide nanostructures, dealing with the synthetic strategies that have been adopted to produce chiral TMDs both via solution-phase and vapor-phase syntheses along with the characterization of their chiroptical properties. A broad range of examples, including a variety of nanostructures such as 0D quantum dots (QDs), 1D nanotubes, 2D flakes, and more complex 3D nanostructures as well as different origins of chirality are considered. Critical analysis of potential pitfalls in the assessment of the materials' chirality are discussed. A broad range of exciting properties and applications associated with the materials' chirality, including: nanomedicine, enantioselective catalysis, spin-dependent electrocatalysis, spintronics, and nonlinear optics, are also presented in the review. Chirality (physics) ; Nanotechnology ; Spintronics ; Nanomaterials ; Materials science ; Symmetry breaking ; Physics ; Condensed matter physics ; Chiral symmetry breaking ; Ferromagnetism ; Quantum mechanics 2D Materials and Applications ; Advanced Photocatalysis Techniques ; Polyoxometalates: Synthesis and Applications
Authors: Viviana Bressi | Jihene Belhaj | Rayhane Zribi | Ramzi Khiari | Claudia Espro
Source: Nanomaterials (article, 2025-10-29)
Field: Materials Science — Materials Chemistry

Sustainable Carbon Dots from Cellulose Precursors for Environmental Sensing: Recent Trends and Outlook Carbon dots (CDs) have emerged as promising nanomaterials for optical sensing due to their outstanding photoluminescence, chemical stability, and biocompatibility. In recent years, the development of sustainable CDs derived from biomass-particularly cellulose-has attracted increasing interest as a green alternative to conventional synthetic routes. This review offers a comprehensive overview of recent advances in synthesis, functionalization, and application of cellulose-based carbon dots for environmental sensing. We examine key synthetic approaches-including hydrothermal, microwave-assisted, and pyrolytic methods-and discuss how the structure and origin of cellulose influence the physicochemical properties of the resulting CDs. The mechanisms underlying their sensing performance are analyzed in detail, with a focus on the detection of heavy metals, organic pollutants, and other environmental contaminants. Challenges related to reproducibility, scalability, and long-term stability are critically addressed. Finally, we outline future directions involving hybrid nanomaterials, real-time sensing platforms, and strategies aligned with circular economy principles. This review aims to serve as a valuable resource for researchers in the fields of sustainable nanomaterials, green chemistry, and environmental sensor development. Cellulose ; Carbon fibers ; Resource (disambiguation) ; Sustainability ; Sustainable development ; Nanomaterials Carbon and Quantum Dots Applications ; Advanced Cellulose Research Studies ; Electrochemical sensors and biosensors
Authors: Shahzad Ali | Sayad Ahad Ali
Source: Current Pharmaceutical Research (review, 2025-04-30)
Field: Materials Science — Biomaterials

Hydrogel Nanostructures for Targeted Drug Delivery in Inflammatory Diseases: A Comprehensive Review In the treatment of inflammatory illnesses, hydrogel nanostructures have shown themselves to be a flexible and promising substrate for targeted drug delivery. The biocompatibility, biodegradability, and controlled, localised drug release capabilities of these systems are highly regarded because they minimise systemic adverse effects and improve therapeutic efficacy. Systems based on hydrogel may be made to react to environmental cues like pH, temperature, or enzymatic activity that are frequently present in inflammatory tissues. Treatment results are improved by this responsiveness, which enables precise medication release at the location of inflammation. Targeting ligands, including peptides or antibodies, are added to improve the efficiency and specificity of medication delivery. By selectively binding to markers produced in inflammatory tissues, these ligands allow hydrogel nanostructures to improve medication accumulation at the intended region while minimising off-target effects. These developments might have a significant impact on diseases including psoriasis, inflammatory bowel illness, and rheumatoid arthritis. Clinical translation is nevertheless hampered by issues including stability, consistent biocompatibility, and manufacturing scalability, despite their potential. These restrictions should be solved by upcoming developments including combination medicines, stimuli-responsive hydrogels, and personalised medicine strategies. By providing more accurate control over medication distribution, these tactics may allow for patient-specific therapies and enhance overall results. A potential strategy for creating patient-centered, long-lasting, and efficient treatments for chronic inflammatory illnesses is the use of hydrogel nanostructures. These systems have the potential to revolutionise the treatment of a variety of inflammatory diseases by tackling present issues and utilising creative design techniques. Drug delivery ; Drug ; Targeted drug delivery ; Medicine ; Nanotechnology ; Pharmacology ; Materials science Nanoparticle-Based Drug Delivery ; Cancer Research and Treatment ; Synthesis of Tetrazole Derivatives
Authors: Xiao Zhang | Guangxu Jin | Min Mao | Zirui Wang | Tianyu Xu | Tongtao Wan | Jinsheng Zhao
Source: Molecules (review, 2025-04-19)
Field: Materials Science — Materials Chemistry

Construction of MXene-Based Heterostructured Hybrid Separators for Lithium–Sulfur Batteries The advancement of lithium-sulfur (Li-S) batteries has been hindered by the shuttle effect of lithium polysulfides (LiPSs) and sluggish redox kinetics. The engineering of functional hybrid separators is a relatively simple and effective coping strategy. Layered transition-metal carbides, nitrides, and carbonitrides, a class of emerging two-dimensional materials termed MXenes, have gained popularity as catalytic materials for Li-S batteries due to their metallic conductivity, tunable surface chemistry, and terminal groups. Nonetheless, the self-stacking flaws and easy oxidation of MXenes pose disadvantages, and developing MXene-based heterostructures is anticipated to circumvent these issues and yield other remarkable physicochemical characteristics. Herein, recent advances in the construction of MXene-based heterostructured hybrid separators for improving the performance of Li-S batteries are reviewed. The diverse conformational forms of heterostructures and their constitutive relationships with LiPS conversion are discussed, and the general principles of MXene surface chemistry alterations and heterostructure designs for enhancing electrochemical performance are summarized. Lastly, tangible challenges are addressed, and advisable insights for future research are shared. This review aims to highlight the immense superiority of MXene-based heterostructures in Li-S battery separator modification and inspire researchers. Lithium (medication) ; Sulfur ; Materials science ; Nanotechnology ; Chemistry ; Organic chemistry ; Biology MXene and MAX Phase Materials ; Advanced Battery Materials and Technologies ; Advancements in Battery Materials