jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Ejiro Prosper Awhin | Iruoghene Onosakponome | Alfred I. Ajoh | Uche Dennis-Eboh | Yvonne Marshall-Enudi | Uchechukwu Levi Osuagwu | Diatachekor Oyibo
Source: Tropical Journal of Pharmaceutical Research (article, 2025-08-15)
Field: Materials Science — Materials Chemistry

Analysis of chitosan nanoparticles synthesized from cowry and oyster shell byproducts using &lt;i&gt;Cymbopogon citratus&lt;/i&gt; and silver nitrate Purpose: To determine the properties of chitosan nanoparticles synthesized from Cymbopogon citratus and silver nitrate (AgNO3).Methods: Chitosan nanoparticles (CNPs) were synthesized using Cymbopogon citratus (Poaceae family), aqueous silver nitrate solution (AgNO3), and chitosan (synthesized via chitin deacetylation separately from oyster and cowry shells). Characterization of both chitosan and its nanoparticles was performed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM).Results: X-ray diffraction (XRD) analysis showed that the chitosan extracted from the oyster and cowry shells had crystallite sizes of 30.10 and 37.48 nm, respectively, and crystallinity indices of 68.71 and 60.22 %, respectively. On the other hand, the synthesized chitosan nanoparticles from oyster and cowry shells exhibited crystallite sizes of 18.59 and 19.34 nm, respectively, with crystallinity indices of 91.65 and 83.04 %. The FTIR analysis revealed that the synthesized chitosan exhibited characteristic peaks for C=O stretching, amide I and C=O stretching in the NHCOCH₃ group, whereas the nanoparticles showed O-H stretching overlapping N-H. Scanning electron microscopy (SEM) imaging showed that the extracted chitosan had irregular, rough edges and a coarse grainy structure, while the nanoparticles displayed small, spherical particles with a grainy texture, suggesting increased porosity.Conclusion: Chitosan nanoparticles have been synthesized through a green process, providing an eco-friendly alternative. Additionally, the structural characteristics of the chitosan nanoparticles suggest their suitability for various industrial applications. Chitosan ; Crystallinity ; Nanoparticle ; Fourier transform infrared spectroscopy ; Crystallite ; Silver nitrate ; Scanning electron microscope Nanoparticles: synthesis and applications ; Nanocomposite Films for Food Packaging
Authors: Himali Upadhyay | Uma Harikrishnan | Devanshi Bhatt | Kapil Kumar | Manthan Panchal | Pooja Trivedi | Gaurang Sindhav | B. K. Patel | Chirag Patel | Krunal Modi
Source: Research Square (preprint, 2025-08-12)
Field: Chemistry — Spectroscopy

Selective Detection of 2, 4-DNT Using Sulfonyl Chloride-Appended Oxacalix[4]arene: Synthesis, Spectroscopic Analysis and Biological Evaluation Sulfonyl ; Chloride ; Chemistry ; Combinatorial chemistry ; Organic chemistry ; Alkyl Molecular Sensors and Ion Detection ; Supramolecular Chemistry and Complexes ; Luminescence and Fluorescent Materials
Authors: Baoji Hu | Bo Liu | Jianhong Liu | Yalan Yang | Shuai Sun | Ningbo Zhao | Manman Zhai | Weili Shao | Qiaoling Zhang
Source: Journal of Applied Polymer Science (article, 2025-06-16)
Field: Materials Science — Polymers and Plastics

Development of Healable, Recyclable, and Reprocessable Two‐Way Responsive Shape Memory Epoxy Resin Composite Materials ABSTRACT This work aims to develop a low‐cost, two‐way shape memory composite material with a low‐temperature response, utilizing a polyethylene glycol‐modified thermoplastic epoxy resin/zinc oxide film (EPP‐Z) as the active response layer and a thermosetting epoxy resin/zinc oxide film (EP‐Z) as the passive response layer. The shape memory EPP‐Z/EP‐Z bilayer composite film (PZ/Z) was fabricated through a straightforward lamination technique. Leveraging the response discrepancy between the active and passive layers during heating, the developed PZ/Z exhibits superior two‐way shape memory capability, achieving a maximum two‐way recovery angle of 15°. Notably, PZ/Z operates at a relatively low response temperature, enabling thermal bending at around 40°C and cold recovery at approximately 25°C. Furthermore, the active response layer of PZ/Z was healable, recyclable, and reprocessable. This work provides an innovative process reference for the cost‐effective development of low‐temperature responsive, two‐way shape memory composite materials. Epoxy ; Composite epoxy material ; Materials science ; Composite number ; Composite material ; Shape-memory alloy ; Polymer science Polymer composites and self-healing ; Silicone and Siloxane Chemistry ; Photopolymerization techniques and applications
Authors: Tatjana Ivaškienė | Jonas Viškelis | Paulina Štreimikytė | Milda Savickaitė | Ali Mobasheri | Greta Kaspute
Source: Frontiers in Nutrition (article, 2025-12-11)
Field: Materials Science — Biomaterials

Collagen supplementation and regenerative health: advances in biomarker detection and smart material integration Collagen, the most abundant structural protein in the human body, plays a key role in skin integrity, tissue repair, and extracellular matrix organization. With increasing consumer and clinical interest, collagen supplementation has expanded rapidly, yet scientific evidence supporting its efficacy in anti-aging and regenerative applications remains inconsistent. This review critically evaluates current evidence on oral collagen supplementation, integrating insights from over 60 clinical studies assessing its effects on skin aging, musculoskeletal health, and hair disorders. Emerging data suggest that hydrolyzed collagen peptides may improve skin elasticity, joint function, and recovery after exercise, particularly when co-supplemented with vitamin C, silica, or resveratrol. Beyond supplementation, recent advances in biosensing and material science have enabled novel approaches to collagen detection and targeted delivery. Electrochemical, optical, and molecularly imprinted polymer (MIP)-based biosensors facilitate real-time monitoring of collagen biomarkers such as CTX-I, MMPs, and hydroxyproline, supporting precision assessment of collagen metabolism. In parallel, collagen-based hydrogels, nanoparticles, and electroresponsive scaffolds have shown promise as biocompatible carriers for controlled drug release and regenerative therapy. Collectively, these developments outline a translational framework connecting collagen supplementation, detection, and delivery. Continued integration of biosensing and smart material technologies may enhance clinical monitoring and therapeutic efficacy, advancing collagen-based interventions toward precision dermatology and regenerative medicine. Regenerative medicine ; Biomarker ; Extracellular matrix ; Biocompatible material ; Regeneration (biology) ; Tissue engineering ; Biosensor ; Biomarker discovery Collagen: Extraction and Characterization ; Skin Protection and Aging ; Periodontal Regeneration and Treatments
Authors: Neha N. Malpure | Sumit Patil | Jaydeep V. Sali | Diego Pugliese | Rakesh A. Afre | Rajendra S. Khadayate
Source: Photonics (article, 2025-12-09)
Field: Materials Science — Materials Chemistry

Influence of Multilayer Architecture on the Structural, Optical, and Photoluminescence Properties of ZnO Thin Films The present work systematically investigates the impact of multilayer architecture—specifically 5, 10, and 15 layers—on the structural, morphological, optical, and dielectric properties of zinc oxide (ZnO) thin films, aiming to tailor their characteristics for optoelectronic applications. The films were characterized using a comprehensive suite of techniques. X-ray diffraction (XRD) analysis of the 15-layer sample confirmed the formation of polycrystalline ZnO with a hexagonal wurtzite crystal structure, showing prominent (100), (002), and (101) diffraction peaks. Measurements indicated that the film thickness progressively increased from 43.81 nm for 5 layers to 80.68 nm for 15 layers. Concurrently, the surface roughness significantly decreased from 5.54 nm (5 layers) to 2.00 nm (15 layers) with increasing layer count, suggesting enhanced film quality and densification. Optical studies using ultraviolet–visible (UV-Vis) spectroscopy revealed an increase in absorbance and a corresponding decrease in transmittance in the UV-Vis spectrum as the film thickness increased. The calculated optical band gap showed a slight redshift, decreasing from 3.26 eV for the 5-layer film to 3.23 eV for the 15-layer film. Photoluminescence (PL) spectra exhibited characteristic near-band-edge UV emission, with the 5-layer film demonstrating the highest PL intensity. Furthermore, analysis of optical constants revealed that the refractive index, extinction coefficient, optical conductivity, and both the real and imaginary parts of the dielectric constant generally increased with an increasing number of layers, particularly in the visible region, while more nuanced and non-monotonic trends were observed in the UV range. These results underscore the significant influence of layer number on the physical properties of ZnO thin films, providing valuable insights for optimizing their performance in various optoelectronic devices. Photoluminescence ; Wurtzite crystal structure ; Thin film ; Dielectric ; Band gap ; Crystallite ; Transmittance ; Surface roughness ; Spectroscopy ZnO doping and properties ; Polymer Nanocomposite Synthesis and Irradiation ; Thin-Film Transistor Technologies
Authors: Yuldashev Laziz Tashpulatovich
Source: World Scientific Research Journal (article, 2025-12-03)
Field: Materials Science — Materials Chemistry

THERMOELECTRIC GENERATORS: OPERATING PRINCIPLES, STRUCTURE AND APPLICATIONS Abstract: Thermoelectric generators (TEGs) represent a critical technology for direct conversion of thermal energy into electrical energy through the Seebeck effect, offering substantial potential for waste heat recovery and sustainable energy generation. This comprehensive review examines the fundamental physics of thermoelectric effects, materials science advances, structural design principles, and diverse applications spanning automotive waste heat recovery to deep space exploration. Recent developments in nanostructured materials have achieved dimensionless figure of merit (ZT) values exceeding 2.4, while segmented TEG modules demonstrate conversion efficiencies up to 12%. Modern research emphasizes novel alloys, nanostructured composites, and flexible materials to enhance energy conversion efficiency across diverse environments. Applications in automotive systems show fuel savings of 3-5%, and radioisotope thermoelectric generators continue enabling multi-decade space missions. This review synthesizes current knowledge on TEG technology, identifies key challenges, and projects future research trajectories for next-generation thermoelectric systems. Thermoelectric effect ; Thermoelectric materials ; Thermoelectric generator ; Waste heat ; Energy transformation ; Automotive industry ; Waste heat recovery unit ; Sustainable energy ; Electric potential energy Advanced Thermoelectric Materials and Devices ; Thermal Expansion and Ionic Conductivity ; Chemical and Physical Properties of Materials
Authors: A. Belmondo Bianchi
Source: American Journal Of Pure And Applied Physics (article, 2025-06-30)
Field: Materials Science — Materials Chemistry

Quantum Transport in Low-Dimensional Materials: Challenges and Opportunities Low-dimensional materials, such as graphene, transition metal dichalcogenides (TMDs), and nanowires, exhibit extraordinary electronic and quantum transport properties that defy conventional bulk behavior. These materials offer avenues for realizing ballistic transport, quantum interference, and energy-efficient nanoelectronic devices. However, the transition from fundamental physics to scalable technologies remains fraught with challenges including disorder, edge effects, contact resistance, and environmental interactions. This article presents an overview of the latest advances in quantum transport in low-dimensional systems, elucidates the key physical phenomena, discusses persistent challenges, and outlines the emerging opportunities driven by innovations in material synthesis, theoretical modeling, and device engineering. Quantum ; Key (lock) ; Quantum technology ; Scalability ; Quantum nanoscience ; Quantum computer 2D Materials and Applications ; Graphene research and applications ; Thermal properties of materials
Authors: Alexandra Nicolae-Maranciuc | Ioana Brezeştean | Septimiu-Cassian Tripon | Andreea Campu
Source: Nanomaterials (article, 2025-11-21)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Comparative and Optimized Chemical Synthesis of AgNPs for Improved Surface Reactivity and Potential Biosensing Applications Silver nanoparticles are metallic particles with very small dimensions and excellent optical, electrical and biological properties. Lately, they have shown promising results in biosensing applications. In the material's fabrication, the synthesis parameters remain the main aspect to be considered once a certain application is targeted. Therefore, this work presents the synthesis of silver nanoparticles using a chemical reduction based on various volumes of reducing and stabilizing agents. The multiple synthesis methods proposed were tested and optimized in order to achieve the best results for further biosensing applications. In this regard, sodium borohydride (NaBH<sub>4</sub>) was used as reducing agent in volumes of 400 μL and 1 mL, while trisodium citrate (TSC) was proposed in much smaller volumes of 10, 20, and 50 μL. The optical and morphological analysis obtained from UV-VIS and TEM microscopy confirmed the formation of nanoparticles in case of all synthesis. The average diameters of silver nanoparticles were in the range between 21 and 27 nm, with high homogeneity for the samples with 20 and 50 μL of TSC. FT-IR analysis confirmed the TSC functionalization on the AgNPs' surface. SERS analysis and the bulk sensitivity method also showed good surface results, leading to the assumption that both reducing and stabilizing agents can influence the final properties of the material. LSPR biosensing of para-aminothiophenol was tested, and was proven to have detection capabilities at concentrations as low as 10<sup>-7</sup> M. Overall, the results proved that the synthesis method with a smaller amount of reducing agent and a moderate quantity of stabilizing agent has superior properties for biosensing applications. Sodium borohydride ; Trisodium citrate ; Biosensor ; Reducing agent ; Nanoparticle ; Silver nanoparticle ; Surface modification ; Chemical reduction ; Homogeneity (statistics) Gold and Silver Nanoparticles Synthesis and Applications ; Laser-Ablation Synthesis of Nanoparticles ; Nanoparticles: synthesis and applications
Authors: Nikolay Semenishyn | Валерія В. Лінник | Sergey S. Smola | N. V. Rusakova
Source: Journal of Chemistry and Technologies (article, 2025-04-15)
Field: Materials Science — Materials Chemistry

ІЧ-ЛЮМІНЕСЦЕНЦІЯ ІОНІВ ІТЕРБІЮ В ІЗОМЕРНИХ КОМПЛЕКСАХ ЕДТА МОДИФІКОВАНИХ ТЕТРАФЕНІЛПОРФІРИНОМ Синтезовано нові комплекси ітербію на основі тетрафенілпорфірину, модифікованого етилендіамінтетра-оцтовою кислотою по орто- і пара-положенням одного фенільного циклу. Така модифікація дозволяє залишити сенсибілізаційну функцію порфірину відносно іону Yb3+ та усуває проблему лабільності традиційних лантанід-порфіринових core-координованих комплексів. Запропоновано новий селективний спосіб синтезу моно пара-нітропохідної тетрафенілпорфірину (основного прекурсору цільової сполуки). В усіх синтезованих комплексах спостерігається 4f-люмінесценція в ближньому ІЧ-діапазоні, а також непогашена молекулярна флуоресценція порфірину, що робить ці комплекси двоемісійними. Отримані результати показують, що обидва ізомери Yb-порфірину мають таку ж ефективність флуоресценції, як і відповідні дитопні едта-пор-фірини, й це доводить відсутність прискорення процесів інтеркомбінаційної конверсії (ISC) та інтеркомбінаційної деградації (ISD) у цих системах. Було виявлено, що інтенсивність 4f-люмінесценції орто-ізомеру вища порівняно з пара-ізомером. Це пов’язано зі змінами просторової структури, що призводить до наближення фрагменту edta-Yb до ядра порфірину. Гасіння люмінесценції сильним парамагнітним іоном показало, що додавання до модифікованих ізомерів едта-порфірину ацетату міді (II) приводить до істотної різниці в ефективності гасіння люмінесценції в результаті non-core взаємодії; таким чином, зменшення інтенсивності люмінесценції більше для орто-ізомеру, ніж для пара-ізомеру. Це доводить, що ефективність взаємодії між порфірином і периферичним замісником дуже чутлива до зміни відстані між ними. Підвищення ефективності 4f-люмінесценції можна пояснити одночасно як зменшенням відстані донор-акцептор, так і відсутністю помітного прискорення ISD, характерного для core-координованих сполук. Environmental science Porphyrin and Phthalocyanine Chemistry ; Photodynamic Therapy Research Studies ; Porphyrin Metabolism and Disorders
Authors: Ayaz M. Mammadov | Rena A. Jafarova | Zaur Z. Aghamali̇yev | Emil A. Aydinsoy | Fargana T. Alizadeh | Rufana R. Mammadova | Emin I. Azizbayli
Source: PPOR (article, 2025-01-01)
Field: Chemistry — Organic Chemistry

Synthesis, antimicrobial activity, dft and molecular docking studies of 4'-(2-(4-chlorophenyl)-1h-phenanthro[9,10-d]-imidazol-1-yl)-[1,1'-biphenyl]-4-amine In this study,imidazol-1-yl)-[1,1'-biphenyl]-4-amine was synthesized and characterized using various spectroscopic techniques, including FT-IR and NMR.The antimicrobial activity of the synthesized compound was evaluated against a range of bacterial and fungal strains.The results demonstrated significant inhibitory effects, suggesting potential pharmaceutical applications.To gain deeper insight into the molecular properties, Density Functional Theory calculations were performed at the B3LYP/6-311G(d,p) level to investigate the electronic structure, frontier molecular orbitals, global reactivity descriptors, and molecular electrostatic potential maps.The optimized structure and electronic parameters provided valuable information regarding the compound's stability and reactivity.Furthermore, molecular docking studies were conducted to evaluate the binding interactions of the synthesized compound with key biological target of 5IIP protein structure from Staphylococcus aureus.The docking results demonstrated strong binding affinity, supporting the compound's potential as an antimicrobial agent.The combination of experimental and computational approaches confirms the biological significance of the synthesized compound and highlights its potential for further development as a promising drug candidate in antimicrobial therapy Biphenyl ; Antimicrobial ; Docking (animal) ; Chemistry ; Combinatorial chemistry ; Amine gas treating ; Stereochemistry ; Medicinal chemistry ; Organic chemistry ; Medicine ; Veterinary medicine Synthesis and biological activity ; Synthesis and Characterization of Heterocyclic Compounds
Authors: A S Srikanta | M.T Padmaja | P Jayashree
Source: International Journal of Latest Technology in Engineering Management & Applied Science (article, 2025-10-31)
Field: Materials Science — Materials Chemistry

Quantum Dots for Cancer Diagnosis: A Comprehensive Review Abstract—Quantum dots (QDs) are semiconductor nanocrystals with exceptional optical and electronic properties, making them highly attractive in biomedical research [1], [6]. Their tunable fluorescence, broad excitation, and high photostability have positioned them as promising tools for cancer diagnostics [3], [7]. This review explores QD applications in in vitro diagnostics (IVD), point-of-care testing (POCT), bioimaging, and signal amplification strategies. Furthermore, emerging trends, safety considerations, and translational challenges are discussed, providing a roadmap toward clinical application [12]. Quantum dot ; Cancer ; Semiconductor ; Translational research Quantum Dots Synthesis And Properties ; Carbon and Quantum Dots Applications ; Nanoplatforms for cancer theranostics
Authors: Himali Upadhyay | Uma Harikrishnan | Devanshi Bhatt | Kapil Kumar | Manthan Panchal | Pooja Trivedi | Gaurang Sindhav | B. K. Patel | Chirag Patel | Krunal Modi
Source: Research Square (preprint, 2025-07-01)
Field: Chemistry — Spectroscopy

Aqueous-Phase Detection of Explosive Residues: Sulfonyl Chloride-Appended Oxacalix[4]arene for 2,4-DNT Monitoring Sulfonyl ; Explosive material ; Aqueous solution ; Chemistry ; Chloride ; Aqueous two-phase system ; Organic chemistry ; Polymer chemistry Mass Spectrometry Techniques and Applications ; Molecular Sensors and Ion Detection ; Luminescence and Fluorescent Materials
Authors: Noushi Zaidi | M. Amin Mir | Sook Keng Chang | Nouara Abdelli | Kim Andrews
Source: Tropical Journal of Pharmaceutical Research (article, 2025-12-04)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Integrating computational analysis with IR, Raman, and visible spectroscopy for ampicillin characterization Purpose: To study the structural, vibrational and electronic properties of ampicillin using a computational approach supported by measurements. Methods: The structural optimization and vibrational frequencies for density functional theory (DFT; B3LYP/6-311++G (d,p)) calculations were utilized. Calculated frequencies were compared with measured FT-IR and FT-Raman vibrational spectra, while molecular electrostatic potential (MEP) mapping and highest occupied molecular orbit-lowest unoccupied molecular orbit (HOMO-LUMO) modeling were used to characterize the charge distribution in the compound to evaluate chemical reactivity. Finally, quantum chemical modeling was used to characterize the interaction of the ampicillin molecule on silver colloids and predictions from the DFT calculations were then verified using surface-enhanced Raman scattering (SERS) from a hydroxylamine-reduced silver colloid at 532 nm. Results: The calculated vibrational wavenumbers corresponded closely with FT-IR and FT-Raman data, confirming a valid computational model. The MEP clearly delineated electropositive regions near -NH₃ group and water molecules, which may serve as sites of reactivity in monomer and dimer ampicillin forms. The HOMO-LUMO models clarified the electronic transitional nature of the compound while DFT modeling on ampicillin adsorption showed good agreement with an effective interaction with silver colloids using SERS. Conclusion: This study demonstrates that DFT and spectroscopic studies accurately characterize the structural, vibrational and electronic properties of ampicillin, as well as an interaction with silver nanoparticles that supports its use as a diagnostic agent in surface-enhanced spectroscopy. Density functional theory ; Molecule ; Raman scattering ; Raman spectroscopy ; Molecular vibration ; Reactivity (psychology) ; Monomer ; Electronic structure ; Spectroscopy Gold and Silver Nanoparticles Synthesis and Applications ; Protein Interaction Studies and Fluorescence Analysis ; Antibiotics Pharmacokinetics and Efficacy