jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: T. Schroeder Rossi | A. Papaderakis | M. Jaugstetter | Z. Jlailati | M. Knoke | P. Hosseini | P. Cignoni | F. Yang | M. Gerwin | O. Trost | M. Spallek | E. ; https://orcid.org/0000-0002-0643-5190 Ortega | B. ; https://orcid.org/0000-0002-8025-307X Roldan Cuenya | D. Crans | N. Levinger | K. Tschulik
Source: MPG.PuRe (Max Planck Society) (article, 2025-08-07)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Bimetallic Ag-Au nanoparticles from nanoconfinement: adjusting properties by electrochemical synthesis Developing synthetic pathways that exhibit well-controlled yet versatile characteristics to prepare nanoparticles (NPs) with properties tailored to the desired application is a topic of continuous interest. Herein, we introduce an innovative approach to form bimetallic alloy and core–shell-like Ag–Au NPs, employing reverse micelles as nanoreactors at the polarized electrolyte/electrode interface. Encapsulation of the metal precursors in the nanocavities of polystyrene-b-poly(2-vinylpyridine) (PS–P2VP) reverse micelles provides a route to control the NP size without the need for additional chemicals. By investigating the relations between the electrochemical driving force of the process and the complex interplay among the precursor species and the electrolyte medium, bimetallic Ag–Au NPs with sizes ranging from below 10 nm to 140 nm were synthesized with adjustable element configuration (core–shell vs. alloy) and composition. Notably, the resultant NPs were either Ag-rich alloys or Au-rich alloys or had a core–shell-like configuration with adjustable core and shell compositions based on the applied electrode potential and electrolyte medium. Finally, the prepared NPs were evaluated for their catalytic activity based on their physical properties against the hydrogen evolution reaction, where the core-shell-like NPs showed the most promising performance. Bimetallic strip ; Nanoreactor ; Nanoparticle ; Electrolyte ; Electrochemistry ; Micelle ; Catalysis Gold and Silver Nanoparticles Synthesis and Applications ; Nanomaterials for catalytic reactions ; Electrocatalysts for Energy Conversion
Authors: Annika Singh | Apanjit Sahi | Brijesh Kr. Bajpai | Amin Hirenbhai Navinbhai | Ashutosh Pandey | Mukesh Singh | Swati Rajput | Anoop Chaturvedi
Source: INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT (article, 2025-09-10)
Field: Materials Science — Biomaterials

Potential of Bacterial Cellulose for Various Medical Applications Abstract Bacterial cellulose (BC) is a highly pure and crystalline biopolymer produced by various aerobic bacteria, exhibiting unique properties compared to plant cellulose, such as transparency, porosity, high water-holding capacity, and flexibility. BC, alone or in combination with other components (e.g., biopolymers and nanoparticles), has a wide range of applications, including medical products, electronic devices, and food ingredients. Biomedical applications of BC have attracted significant attention due to the growing demand for advanced wound care, tissue regeneration, disease diagnostics, and drug delivery systems. Bacterial cellulose offers substantial potential for developing innovative materials in healthcare, and this review presents comprehensive information on BC production by Acetobacter xylinum and its medical applications. The latest advances in the use of BC in medicine, both in pure and composite forms, are thoroughly discussed. Keywords: Bacterial cellulose, Acetobacter xylinum, Tissue engineering, Drug delivery, Skin care, wound dressing and factor affecting Bacterial cellulose ; Biopolymer ; Cellulose ; Acetobacter ; Drug delivery Advanced Cellulose Research Studies ; Polysaccharides Composition and Applications
Authors: Bouriche, A. (Amina) | Barrera, A. (Ana) | Binet, C. (Corinne) | Ropa, P. (Patrick) | Dubois, F. (Fréderic) | Bedjaoui‐Alachaher, L. (Lamia) | Bouberka, Z. (Zohra) | ILIŞ, M. (Monica) | Maschke, U. (Ulrich)
Source: SPIRE - Sciences Po Institutional REpository (article, 2025-04-01)
Field: Materials Science — Electronic, Optical and Magnetic Materials

FROM RESIDUAL MESOGENS TO RESPONSIVE MATERIALS:RECYCLED LIQUID CRYSTALS FROM END-OF-LIFE SCREENS IN PHOTOCURABLE ACRYLATE NETWORKS Des composites photodurcissables ont été développés à partir d'acrylate d'isobornyle et de composants à cristaux liquides recyclés, durcis sous lumière ultraviolette à l'aide d'un agent de réticulation réactif et d'un photo-initiateur. La caractérisation physique comprenait la spectroscopie infrarouge, la calorimétrie différentielle à balayage, l'analyse mécanique dynamique et la rhéologie. La spectroscopie a confirmé une conversion de plus de 90 % des doubles liaisons carbone-carbone. La calorimétrie a révélé une suppression des transitions mésophases, indiquant une encapsulation efficace. L'analyse mécanique a montré une diminution de la température de transition vitreuse d'environ 90 °C à 65 °C et une réduction marquée de la rigidité. Les mesures rhéologiques ont indiqué une amélioration de l'écoulement due à une viscosité plus faible. Ces résultats démontrent un effet plastifiant et la compatibilité des cristaux liquides recyclés, permettant des propriétés fonctionnelles ajustables pour des applications optiques. Liquid crystal ; Acrylate ; Liquid crystalline ; Liquid state ; Acrylate polymer Liquid Crystal Research Advancements ; Advanced Materials and Mechanics ; Advanced Optical Imaging Technologies
Authors: Eunji Im | Jiwoo Park | Sohyun Park
Source: Advanced Functional Materials (article, 2025-12-26)
Field: Materials Science — Surfaces, Coatings and Films

Surface‐Grown Organic Architectures for Nanoelectronics: From Molecular Design to Device Function ABSTRACT Surface‐grown organic structures—organic molecules or polymers chemically tethered to substrates—have emerged as versatile platforms for tailoring surface properties and enabling advanced functionalities in nanoscale electronic devices. These structures, formed via surface‐initiated oligomerization or polymerization, offer precise control over parameters such as surface energy, wettability, and biocompatibility, making them indispensable in applications ranging from sensors and microfluidics to organic semiconductors and antifouling coatings. In the realm of organic and flexible electronics, polymer brushes derived from surface‐grown architectures exhibit enhanced stability and tunable electronic properties, distinguishing them from their free polymer counterparts. This review provides a comprehensive overview of surface‐grown organic structures for applications in nanoscale electronic devices. We first explore the charge transport mechanisms in surface‐initiated oligomers and polymers, highlighting the transition from tunneling to hopping in oligomers and the influence of molecular alignment and morphology on charge mobility in conjugated polymers. Next, we examine the synthetic strategies and chemical methodologies employed in constructing these structures, including dipping, electrografting, click reactions, and advanced polymerization techniques such as SI‐ATRP, SI‐RAFT, and hybrid grafting approaches. Finally, we delve into their integration into nanoelectronic devices, encompassing sensors, field‐effect transistors, light‐emitting diodes, photovoltaic cells, memory resistors, rectifiers, triboelectric and thermoelectric materials, and spin valves. Polymer ; Nanoscopic scale ; Organic semiconductor ; Triboelectric effect ; Polymerization ; Microfluidics ; Organic solar cell ; Conjugated system Polymer Surface Interaction Studies ; Surface Chemistry and Catalysis ; Molecular Junctions and Nanostructures
Authors: Nushaba M. Aliyeva | F. Mamedov | Ulviyya A. Karimova | Ainura Aliyeva | Fidan M. Hasanova | Gunel N. Hamzayeva
Source: PPOR (article, 2025-01-01)
Field: Chemistry — Inorganic Chemistry

Study of ZrO2/SiO2 catalyst and hydrocarbons obtained from n-propyl alcohol using it by chromatographic and thermogravimetric methods This study investigates the thermal desorption of n-propyl alcohol adsorbed on a ZrO/SiO nano-structured oxide-based catalyst within the 120-550C temperature range.The released gas phase was analyzed using chromatographic techniques, and the active sites on the catalyst surface were examined to understand their role in hydrocarbon formation.The physicochemical properties of the ZrO/SiO catalyst were characterized before and after adsorption using thermal analysis, X-ray diffractometry, X-ray fluorescence microscopy, dynamic light scattering (DLS), and infrared spectroscopy.Elemental composition was determined by scanning a 10 m diameter area at five different points, allowing for the quantification of SiO and ZrO oxides and their distribution on the catalyst surface.DLS analysis revealed significant changes in particle size distribution, suggesting structural modifications due to thermal desorption.Gas chromatography confirmed that at 120C, propylene yield was 100%, but its output decreased as the temperature increased.Above 200C, the formation of various C-C hydrocarbons was observed, indicating secondary conversion reactions.Additionally, X-ray phase curves, infrared spectra, and thermograms provided further insights into structural transformations in the catalyst.These findings contribute to a deeper understanding of the catalyst's active sites, reaction mechanisms, and efficiency in alcohol-to-hydrocarbon conversion, offering valuable insights for catalytic applications in hydrocarbon synthesis Thermogravimetric analysis ; Catalysis ; Alcohol ; Chromatography ; Chemistry ; Organic chemistry Zeolite Catalysis and Synthesis ; Catalysis and Hydrodesulfurization Studies ; Inorganic and Organometallic Chemistry
Authors: Jem Pitcairn | Mario Antonio T. Ongkiko | Peter J. Speakman | J.P. Tidey | Jack W. Jordan | Graham N. Newton | J. R. Stewart | Pascal Manuel | Andrew J. Morris | Matthew J. Cliffe
Source: ChemRxiv (preprint, 2025-08-04)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Enhancing superexchange through frontier orbital engineering in a van der Waals metal-organic magnet Van der Waals metal-organic magnets (vdW MOMs) offer the possibility of realis- ing a wide-range of magnetic functionalities not possible in inorganic vdW magnets. In particular, they offer the opportunity to enhance magnetic interactions using organic functionalisation to control ligand energy levels directly. We report a new vdW MOM, CrCl2(btd) (btd = 2,1,3-benzothiadiazole), assembled from a high energy early transi- tion metal and a redox-active ligand, which leads to a small charge-transfer gap. We solve the structure using a combination of powder neutron diffraction and single crystal electron diffraction, showing that this material contains Cr2+btd0. Magnetometry, neutron diffraction and inelastic neutron scattering allow us to quantitatively determine the magnetic properties of this vdW magnet, showing it is a collinear rectangular antiferromagnetwithsmalleasyaxisanisotropy(JCl =−15.31(5)K,Jbtd =−6.96(10)K, D = −2.0(2) K). Critically, we find that the superexchange through the redox-active btd is significantly stronger than in the non-redox-active CrCl2(pym) (pym = pyrimidine) analogue (Jpym = 1.2(2)K), demonstrating that exchange can be enhanced without the need for electron transfer onto ligands. This work provides a route towards vdW MOMs with strong magnetic superexchange. Superexchange ; Frontier ; Magnet ; van der Waals force ; Metal ; Condensed matter physics ; Chemical physics ; Nanotechnology ; Physics ; Materials science ; Engineering physics ; Aerospace engineering ; Chemistry ; Engineering ; Quantum mechanics ; Metallurgy ; Ferromagnetism ; Geography ; Molecule ; Archaeology Magnetism in coordination complexes ; Organic and Molecular Conductors Research ; Porphyrin and Phthalocyanine Chemistry
Authors: Nandarapu Kumarswamyreddy | Lakshminarayana Satham | Abhishek Kumar
Source: Journal of Molecular Chemistry. (article, 2025-10-01)
Field: Chemistry — Organic Chemistry

N-Heterocyclic-Carbene (NHC)-catalyzed reactions of α-bromo α,β-unsaturated aldehydes for one-pot cascade stereoselective synthesis of Spirooxindole γ-butyrolactones Spirooxindole frameworks, especially γ-butyrolactones, are privileged scaffolds in medicinal chemistry due to their structural rigidity and broad biological relevance. However, their stereoselective synthesis remains a challenge with existing methods often requiring toxic metals or harsh conditions. Herein, we report a novel practical, metal-free, and stereoselective N-heterocyclic carbene (NHC)-catalyzed cascade [3+2] annulation of 3-hydroxyoxindoles with α-bromo-α,β-unsaturated aldehydes to stereoselective delivered spirooxindole γ-butyrolactones in high yields (67–95%) with excellent diastereoselectivity (&gt;20:1 dr) under mild reaction conditions. This method demonstrates broad substrate tolerance, accommodating diverse N1-substituted 1,2-binucleophiles 3-hydroxyoxindoles and electron-rich 1,3-bielectophiles α-bromoenals. Eco-friendly, sustainable transformation expands the synthetic toolbox for spirooxindole γ-butyrolactones, offering a valuable entry to biologically relevant scaffolds. Stereoselectivity ; Annulation ; Cascade ; Cascade reaction ; Reaction conditions ; Substrate (aquarium) N-Heterocyclic Carbenes in Organic and Inorganic Chemistry ; Cyclopropane Reaction Mechanisms ; Catalytic Cross-Coupling Reactions
Authors: A. Tressaud | Zhichao Wang | Yuqi Tang | Quan Li
Source: Responsive materials (article, 2025-11-01)
Field: Materials Science — Materials Chemistry

Emerging applications of rare‐earth fluoride nanocrystals in medicine and biotechnologies Abstract Inorganic fluoride‐based compounds are present today as decisive components in many advanced technologies, including energy storage and conversion, dye‐sensitized solar cell, microphotonics, medicine, pharmaceuticals, etc. Most of these outstanding behaviors can be correlated to the exceptional electronic properties of the element fluorine: “F 2 .” The role of fluorinated rare‐earth (RE)‐based nanoparticles (NPs), mostly deriving from the fluorite structure, is also crucial in medicine and biotechnologies, where doped photoluminescent rare‐earth fluoride nanoparticles (REFNPs), exhibiting high responsivity, can be used as bi‐ or multi‐modal agents in theranostics, integrating both imaging probes and therapeutics; these materials can thus carry out both diagnosis and therapy within the same nano‐object. Relevant nanotherapeutics also include fluorine‐labeling of NPs, in vivo 19 F magnetic resonance imaging, photodynamic therapy, up‐ and down‐conversion luminescence, ultrafast upconversion superfluorescence, luminescent thermometry, photoacoustic imaging, radiotracers for positron emission tomography. Finally, research aimed at better understanding the toxicity risks of these NPs as well as better knowledge of the type of formulations of the used nano‐sensors should make it possible to improve the correlations between the selected REFNPs and the expected responses. Photon upconversion ; Nanoparticle ; Photoacoustic imaging in biomedicine ; Photoluminescence ; Fluoride ; Photodynamic therapy Lanthanide and Transition Metal Complexes ; Luminescence Properties of Advanced Materials ; Inorganic Fluorides and Related Compounds
Authors: Christoph Popp | Patrick Moser | X. Liu | Johannes Freitag | Isabel Prucker | Robert Zscherp | Xuan Wang | Philipp Klahn | H Koch | Gert Bange | Henning J. Jessen
Source: bioRxiv (Cold Spring Harbor Laboratory) (preprint, 2025-10-22)
Field: Materials Science — Materials Chemistry

Controlled Delivery and Light-Induced Release of Magic Spot Nucleotides in <i>Escherichia coli</i> Abstract The “magic spot nucleotides” (MSNs) ppGpp and pppGpp (also: (p)ppGpp) are bacterial alarmones central to the conserved stringent response, a stress adaptation mechanism that helps bacteria adapt to stress conditions and hostile environments. Current strategies to manipulate MSN levels rely mainly on genetic or environmental approaches, which are slow and lack temporal control. Chemical tools such as photocaged MSN analogues could provide such temporal control over MSN levels. However, the high negative charge of MSNs prevents spontaneous passage through the complex bacterial cell envelope. Here, we report the synthesis of photocaged, clickable, and isotope-labeled MSN analogues and their delivery into Escherichia coli comparing different approaches. A cyclodextrin-based synthetic nucleotide transporter provides particular advantages. Upon 400 nm irradiation, these probes were photo-released inside living cells, where we tracked their conversion from pppGpp to ppGpp by capillary electrophoresis mass spectrometry and studied their ability to alter growth in a (p)ppGpp 0 mutant. This work provides the first demonstration that highly charged, photocaged MSNs can traverse the bacterial envelope, be photo-released intracellularly, and be metabolically tracked in real time. These probes lay the foundation for spatially and temporally controlled studies of MSN function and of other highly negatively charged metabolites in bacteria. Nucleotide ; Bacteria ; Mass spectrometry ; Capillary electrophoresis ; Cell ; HEK 293 cells ; Transporter ; Stringent response ; Amino acid Photochromic and Fluorescence Chemistry ; DNA and Nucleic Acid Chemistry ; Advanced biosensing and bioanalysis techniques
Authors: Tim Müller | Philippe Ferber | Philipp M. Roos | Nabil Assahub | Christoph Janiak
Source: Zeitschrift für anorganische und allgemeine Chemie (article, 2025-10-22)
Field: Materials Science — Materials Chemistry

Lanthanide Coordination Networks Based on Diamantane‐4,9‐Diphosphonic Acid Four new Ln‐based (Ln = Eu, Gd, Er) coordination networks, {[EuL 1.5 (H 2 O) 4 ]·H 2 O} n and {[LnL 1.5 (H 2 O)]·H 2 O} n (Ln = Eu, Gd, Er), were synthesized using the precursor diamantane‐4,9‐bis(dichlorophosphoryl) (Diam(POCl 2 ) 2 ) to form in situ the linker diamantane‐4,9‐bis(hydrogenphosphonate) (L = Diam(PO 3 H) 2 2– ) with singly deprotonated phosphonate groups. These coordination networks represent the first reported examples of diamantane‐phosphonate networks. The combination of Ln 3+ ions and Diam(PO 3 H) 2 2– resulted in the formation of doubly ‐PO 3 H – bridged Ln chains. These chains are interconnected by the diamantane moiety of the diamantane‐4,9‐bis(hydrogenphosphonate) linker, forming 2D (Eu) or 3D (Eu, Gd, Er) networks. In the 3D networks, Eu 3+ , Gd 3+ , and Er 3+ exhibit an uncommon coordination number of 6, from five phosphonate groups and one aqua ligand. This may be due to the constraints of the 3D network but at the same time shows the adaptability of Ln 3+ ions to coordination constraints crucial for the formation of the 3D phosphonate frameworks. Phosphonate ; Lanthanide ; Moiety ; Linker ; Deprotonation ; Coordination number Lanthanide and Transition Metal Complexes ; Metal-Organic Frameworks: Synthesis and Applications ; Chemical Synthesis and Characterization
Authors: M. Karuthamani | K. Sundharaiya | M. Kabilan | S. Nagaraj | V.K. Bupesh Raja | Palanichamy Nandhini
Source: Annals of Phytomedicine An International Journal (article, 2025-06-01)
Field: Materials Science — Materials Chemistry

Nano-Green revolution: Harnessing phytoengineered nanoparticles for sustainable tomato production Nanotechnology is revolutionizing modern agriculture, offering innovative solutions to enhance crop productivity while promoting sustainability.Among various crops, tomato (Solanum lycopersicum L.) has emerged as a model system for studying nanotechnological interventions due to its global economic and nutritional importance.However, tomato cultivation faces significant challenges from both biotic stressorsincluding fungal, bacterial, and viral pathogensand abiotic factors such as drought, salinity, and temperature extremes.Conventional agrochemicals, though effective, often pose environmental and health concerns due to their non-biodegradable nature and off-target effects.As a response to these limitations, the development of green nanotechnology particularly the use of phytoengineered nanoparticles (phyto-NPs) is gaining momentum.Phyto-NPs are synthesized using plant extracts that serve as natural reducing and stabilizing agents.This eco-friendly approach avoids the use of toxic chemicals typically associated with physical and chemical synthesis methods, making it more sustainable and compatible with agricultural applications.These nanoparticles not only inherit beneficial properties from the plant phytochemicals involved in their synthesis but also exhibit enhanced biocompatibility, stability, and multifunctionality.Their small size and large surface area allow for efficient uptake by plants and targeted delivery of active ingredients, leading to improved disease management, stress tolerance, and nutrient use efficiency.In tomato crop management, phyto-NPs have demonstrated promising results in enhancing plant growth, suppressing pathogen infections, and alleviating environmental stress through mechanisms such as defence induction, antioxidant modulation, and improved metabolic activity.Despite these advantages, challenges related to scalability, standardization, long-term safety, and regulatory oversight remain barriers to widespread adoption.This review aims to provide a comprehensive overview of phytoengineered nanoparticles in tomato cultivation, covering synthesis techniques, key phytochemicals involved, modes of action at physiological and molecular levels, and practical applications.It also discusses the limitations and future directions necessary for integrating phyto-NPs into mainstream agricultural practices.By bridging current knowledge gaps, this review highlights the potential of plantbased nanotechnology as a sustainable tool for next-generation horticultural innovation. Green Revolution ; Nano- ; Production (economics) ; Sustainable production ; Nanotechnology ; Business ; Engineering ; Materials science ; Chemical engineering ; Economics ; Biology ; Ecology Nanoparticles: synthesis and applications
Authors: Donetti, Nicolas
Source: KTH Publication Database DiVA (KTH Royal Institute of Technology) (article, 2025-01-01)
Field: Materials Science — Biomaterials

Utvärdering av polyhydroxialkanoatbaserade blandningar för hållbara farmaceutiska leveranssystem Detta arbete undersöker lämpliga polyhydroxialkanoatblandningar (PHA) att använda i Novo Nordisks injektionspennor. Fem PHA-blandningar analyserades, var och en med varierande förhållanden av PHA, inklusive poly-3-hydroxibutyrat-co-3-hydroxivalerat (PHBV), poly-3-hydroxibutyrat-co-3-hydroxihexanoat (PHBH350) och poly-3-hydroxibutyrat-co-4-hydroxibutyrat (P3HB4HB), med sammansättningar från 70:30 till 55:45 med eller utan talk. Studien undersökte kristallisationskinetik, sekundärkristallisation och mekaniska egenskaper genom differentiell svepkalorimetri (DSC) och dragprovning. En livscykelanalys (LCA) utfördes för att utvärdera koldioxidutsläpp, och inverkan av olika kristallisationshastigheter på processcykeltiden studerades. Avrami-modellen tillämpades på isotermisk kristallisation av blandningen och visade att en jämvikt mellan halvkristallina och amorfa PHA, särskilt med kortare kolvätekedjor och en liten talktillsats, accelererade kristallisationen. Draghållfasthetstester indikerade en högre draghållfasthet och lågt krypbeteende för blandningar med ett förhållande nära 1:1. Dessutom uppvisade blandningar innehållande PHBH350 lägre dragspänningar och seghet men en större Youngs modul. LCA-resultat visade en minskning av koldioxidavtrycket på 3 % till 5 % med talktillsats och optimerade kristallisationshastigheter. Slutligen uppvisade blandningen innehållande 55 viktprocent PHBV och 45 viktprocent PHBH350 med en låg mängd talk de bästa resultaten i alla uppmätta parametrar och formades framgångsrikt till en högprecisionskomponent. Element (criminal law) ; Order (exchange) biodegradable polymer synthesis and properties ; Hydrogels: synthesis, properties, applications ; Polymer crystallization and properties