jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Panpan Li | Enhai Song | Weichao Wang | Qinyuan Zhang
Source: Advanced Optical Materials (article, 2024-09-17)
Field: Materials Science — Ceramics and Composites

Sn<sup>2+</sup>/Pb<sup>2+</sup> Doping‐Induced Highly Transparent Boroaluminate Microcrystalline Glass With Deep Traps for Long‐Term Optical Storage and Time‐Lapse X‐ray Imaging Abstract The development of microcrystalline glass‐ceramics with high transparency and deep trap energy levels is crucial for the cost‐effective and large‐scale production of scintillators and optical data storage applications. In this study, the incorporation of highly electronegative divalent tin (Sn 2+ ) plays a key role in modulating the network structure of borate glass. This leads to the successful synthesis of SrAl 2 O 4 :Eu 2+ microcrystalline glass with high transparency, reaching up to 80%, and excellent crystallinity. Additionally, a series of non‐optically active ions with different valence states is co‐doped with Eu 2+ to fine‐tune the trap levels of the SrAl 2 O 4 microcrystals. All samples maintain high crystallinity and exhibit good transparency. In particular, the Pb 2+ ion co‐doped samples achieve an increased trap energy level of 1.28 eV, significantly enhancing their capacity to capture X‐rays and ultraviolet light. Density functional theory calculations reveal that this enhancement is due to severe lattice distortion caused by Pb 2+ ions occupying interstitial sites in SrAl 2 O 4 . Utilizing the SrAl 2 O 4 :Eu 2+ , Pb 2+ glass‐ceramics materials, X‐ray imaging with a delay of up to 210 s and optical information storage for &gt;60 d is achieved. This study provides valuable insights into the crystal growth and trap modulation of persistent luminescent materials within a three‐dimensional glass network structure. Microcrystalline ; Materials science ; Doping ; 3D optical data storage ; Optoelectronics ; Optics ; Radiochemistry ; Crystallography ; Physics Glass properties and applications ; Luminescence Properties of Advanced Materials ; Phase-change materials and chalcogenides
Authors: Gabriel L. Catuzo | Yuri Luiz de Lima | Davi D. Petrolini | Elisabete M. Assaf
Source: Catalysis Today (article, 2024-08-15)
Field: Materials Science — Materials Chemistry

Influence of the La/Ce ratio on La-Ce oxides promoted by Sr in the methane oxidative coupling reaction Oxidative coupling of methane ; Catalysis ; Methane ; Chemistry ; Oxidative phosphorylation ; Heterogeneous catalysis ; Inorganic chemistry ; Organic chemistry Catalytic Processes in Materials Science ; Catalysis and Oxidation Reactions ; Magnetic and transport properties of perovskites and related materials
Authors: Minjuan Cai | Yijie Qiu | Feiming Li | Shunyou Cai | Zhixiong Cai
Source: ACS Applied Materials & Interfaces (article, 2024-08-22)
Field: Materials Science — Materials Chemistry

Supramolecular Assembly of Hydrogen-Bonded Organic Frameworks with Carbon Dots: Realizing Ultralong Aqueous Room-Temperature Phosphorescence for Anticounterfeiting Room-temperature phosphorescent carbon dots (RTP-CDs) have received increasing attention due to their excellent optical properties and potential applications. Nevertheless, the realization of RTP-CDs in aqueous solutions remains a considerable challenge due to the water-molecule- and oxygen-induced deactivation of the triplet excitons, which leads to phosphorescence quenching. In this study, ultralong phosphorescence in water was achieved by in situ self-assembly of CDs encapsulated in a rigid hydrogen-bonded organic framework (HOF). The phosphorescence lifetime reaches an impressive 956.96 ms and exhibits long-lasting optical and structural stability in water for more than 90 days. The composite material not only has ultralong luminescence life and excellent luminescence stability but also has two-color phosphorescence emission, as well as excellent antiphotobleaching and phosphorescence stability in aqueous solution, which can solve the current problem that RTP is easily burst out by water and moisture. In addition, this study introduced a fluorescent dye based on the triplet-singlet Förster resonance energy transfer system (TS-FRET) to fine-tune the afterglow properties. This work will inspire the design of RTP systems with dual phosphor light sources and provide new strategies for the development of smart RTP materials in water. Phosphorescence ; Materials science ; Luminescence ; Aqueous solution ; Phosphor ; Photochemistry ; Quenching (fluorescence) ; Phosphorescent organic light-emitting diode ; Nanotechnology ; Fluorescence ; Optoelectronics ; Chemistry ; Organic chemistry ; Optics Luminescence and Fluorescent Materials ; Carbon and Quantum Dots Applications ; Molecular Sensors and Ion Detection
Authors: Narayan Ch. Jana | Soumi Halder | Paula Brandão | Partha Pratim Ray | Biswajit Chowdhury | Joaquín Ortega‐Castro | Antonio Frontera | Anangamohan Panja
Source: Crystal Growth & Design (article, 2024-04-29)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Solvent-Induced Polymorphism in a Schiff Base Compound and Their Distinguishing Effects on Semiconducting Behaviors for Utilization in Photosensitive Schottky Devices The capacity to selectively tune the optical and electrical properties of organic molecules has emerged as an effective strategy for the development of flexible optoelectrical devices. These physical properties are influenced by crystal packing, and as a result, they are expected to vary with polymorphic modifications. Herein, we illustrate the pivotal influence of polymorphism on the optoelectronic traits of the resulting solids, paving the way for prospective applications such as photosensitive Schottky devices. In this study, we isolated two distinct color polymorphs, denoted as I and II, of a novel Schiff base, (E)-2-methoxy-4-methyl-6-((3-nitrophenyl)iminomethyl)phenol, obtained from the condensation reaction between 2-hydroxy-3-methoxy-5-methylbenzaldehyde and m-nitroaniline. These polymorphs I and II were obtained in pure crystalline forms using different solvents, namely, acetonitrile and methanol, respectively. Analysis via X-ray crystallography unveiled that both forms I and II crystallize within the orthorhombic unit cell, albeit with different space groups of P212121 and Pca21, respectively. Notably, the nitro group in these polymorphic forms establishes distinct noncovalent interactions, ensuring the selective stability of each polymorphic form in the solid state with discernible contributions from the solvents. Furthermore, polymorphs I and II exhibited reversible thermochromic behaviors between room temperature and low temperature (77 K). Electrical conductivity and photosensitivity studies of the polymorphs revealed that the electrical properties of these polymorphs are significantly different, with notable enhancements observed, particularly for form II, upon illumination with visible light. Our results overall highlight the potential of polymorphic design as a promising avenue for fine-tuning the optoelectrical properties of organic crystalline materials, thereby opening avenues for their utilization in the fabrication of photosensitive devices. Orthorhombic crystal system ; Polymorphism (computer science) ; Acetonitrile ; Crystallography ; Chemistry ; Solvent ; Space group ; Molecule ; Schiff base ; Thermochromism ; Crystal structure ; Materials science ; X-ray crystallography ; Organic chemistry ; Diffraction Nonlinear Optical Materials Research ; Crystal structures of chemical compounds ; Crystallography and molecular interactions
Authors: Lindsay Grandy | Sarah R. Yassine | Robert Lacasse | Janine Mauzeroll
Source: Analytical Chemistry (article, 2024-05-02)
Field: Materials Science — Materials Chemistry

Selective Initiation of Corrosion Pits in Stainless Steel Using Scanning Electrochemical Cell Microscopy Scanning electrochemical cell microscopy is a useful technique for determining variations in corrosion behavior across a surface. However, the numerous options for experimental parameters and little understanding of their effect on the corroding system render comparisons of results between studies difficult. Herein, we explore changes in corrosion behavior of two martensitic stainless steels, a cast CA6NM and a wrought S41500, as a result of the chosen experimental parameters, including scan rate, approach potential, surface oil immersion, and tip aperture diameter. The study demonstrates that these experimental parameters can be controlled to probe oxide passivation kinetics and single pitting events by changing the surface state and cathodic currents. We measured the pitting and repassivation kinetics of a single pit and determined the compositional change of the Al<sub>2</sub>O<sub>3</sub> inclusion site initiation point. Hundreds of data points were measured within 17 h of experimental time on the stainless steel samples, allowing statistical averages of corrosion and pitting values. This work will open new avenues for fine-tuning various corrosion aspects at the microscale, thereby contributing to a deeper understanding of the corrosion processes and mechanisms of diverse materials. Chemistry ; Scanning electrochemical microscopy ; Corrosion ; Electrochemistry ; Scanning electron microscope ; Metallurgy ; Microscopy ; Chemical engineering ; Nuclear chemistry ; Composite material ; Electrode ; Optics ; Organic chemistry Corrosion Behavior and Inhibition ; Hydrogen embrittlement and corrosion behaviors in metals ; Anodic Oxide Films and Nanostructures
Authors: Yan Zhang | Can Li | Lei Shu | Yun‐Lei Teng | Bao‐Xia Dong
Source: Inorganic Chemistry (article, 2024-06-11)
Field: Materials Science — Materials Chemistry

Research on the Construction of a Series of Transition Metal-Substituted Keggin-Type TMSPOMs@PCN-224 Composites through the Encapsulation Method and Their Electron Transfer Mechanism in CO<sub>2</sub>RR In order to take advantage of the distinct reversible multielectron transfer properties of polyoxometalates (POMs) and increase the electron density at the active sites during the electrochemical reduction of CO<sub>2</sub> (CO<sub>2</sub>RR), a range of transition metal-doped polyoxometalates (TMSPOMs) was entrapped within the porphyrin-based framework of PCN-224 <i>via</i> an encapsulation method, known as TMSPOMs@PCN-224 (TMSPOMs = [XW<sub>11</sub>O<sub>39</sub>M<sup>II</sup>(H<sub>2</sub>O)]<sup>n-</sup>, [XW<sub>11</sub>O<sub>40</sub>V<sup>IV</sup>]<sup>n-</sup>, M = Co<sup>II</sup>, Mn<sup>II</sup>; X = Si, <i>n</i> = 6; X = P, <i>n</i> = 5). The central elements (Si, P) and the incorporated transition metals (V<sup>IV</sup>, Co<sup>II</sup>, and Mn<sup>II</sup>) both play a role in adjusting the electronic structure and electron transfer during the CO<sub>2</sub>RR process. Remarkably, the composite material with cobalt substitution displayed significantly improved performance. Through fine-tuning the POM loading, the electrocatalytic activity was optimized, leading to an impressive Faradaic efficiency for CO production (FE<sub>CO</sub>) of 89.9% for SiW<sub>11</sub>Co@PCN-224, a significant improvement compared to the 12.1% FE<sub>CO</sub> of PCN-224. Furthermore, the electrochemical stability of this catalyst was demonstrated over 20 h. Comparative analyses involving six composite materials indicated a relationship between the negative charge of the polyanions and their ability to facilitate effective electron transfer, ultimately enhancing the catalyst's performance. Meanwhile, these findings were supported by density functional theory (DFT) calculations. Chemistry ; Electron transfer ; Electrochemistry ; Transition metal ; Electron ; Metal ; Nanotechnology ; Photochemistry ; Physical chemistry ; Electrode ; Catalysis ; Organic chemistry ; Quantum mechanics Polyoxometalates: Synthesis and Applications ; Metal-Organic Frameworks: Synthesis and Applications ; Covalent Organic Framework Applications
Authors: Nagalekshmi Uma Thanu Krishnan Neela | Piotr K. Szewczyk | Joanna Karbowniczek | Martyna Polak | Joanna Knapczyk‐Korczak | Urszula Stachewicz
Source: Macromolecular Rapid Communications (article, 2024-12-27)
Field: Materials Science — Biomaterials

Improving Stability and Mechanical Strength of Electrospun Chitosan‐Polycaprolactone Scaffolds Using Genipin Cross‐linking for Biomedical Applications Electrospun nanofiber scaffolds have become vital in biomedical applications due to their high surface area and tunable properties. Chitosan (CS) is widely used, but its rapid degradation limits its effectiveness. This study addresses this limitation by blending CS with polycaprolactone (PCL) and applying genipin cross-linking to enhance its stability and mechanical properties. Scanning electron microscopy indicated a uniform morphology of the electrospun fibers, and further, the crystallinity of the scaffolds before and after cross-linking is verified. Fourier-transform infrared spectroscopy is used to analyze the chemical structure, identifying the presence of trifluoroacetic acid residues in the as-spun fibers. These residues are successfully eliminated through neutralization and cross-linking, which are critical for enhancing stability and cell viability in in-vitro studies. Mechanical testing revealed that cross-linked CS+PCL scaffolds exhibit a 350% increase in tensile strength compared to pure CS, and zeta potential reaches the favorable for cell development -26.27 mV. The cytotoxicity assay results with murine NIH 3T3 fibroblast cells indicate the suitability of CS+PCL scaffolds for targeted tissue engineering and wound healing. This work establishes the potential for fine-tuning scaffold properties to create stable, functional, and biocompatible substrates for extended biomedical use. Genipin ; Polycaprolactone ; Materials science ; Chitosan ; Crystallinity ; Tissue engineering ; Ultimate tensile strength ; Scaffold ; Nanofiber ; Chemical engineering ; Fourier transform infrared spectroscopy ; Zeta potential ; Electrospinning ; Surface modification ; Biomedical engineering ; Composite material ; Nanotechnology ; Polymer Electrospun Nanofibers in Biomedical Applications ; Advanced Sensor and Energy Harvesting Materials ; Silk-based biomaterials and applications
Authors: S. R. Sinha | Arpan Kumar Tripathi | Ashish Pandey | Poonam Naik | Aakansha Pandey | Vinay Sagar Verma
Source: Biocatalysis and Agricultural Biotechnology (article, 2024-06-19)
Field: Materials Science — Biomaterials

Self-assembled PEGylated micelles for precise and targeted drug delivery: Current challenges and future directions Nanocarriers ; Nanotechnology ; Transformative learning ; Micelle ; Drug delivery ; Nanomedicine ; Computer science ; Materials science ; Chemistry ; Psychology ; Nanoparticle Nanoparticle-Based Drug Delivery ; RNA Interference and Gene Delivery ; Advanced biosensing and bioanalysis techniques
Authors: Yu‐Chieh Lin | I‐Son Ng
Source: Journal of the Taiwan Institute of Chemical Engineers (article, 2024-11-30)
Field: Materials Science — Biomaterials

Biofabrication of polyhydroxybutyrate (PHB) in engineered Cupriavidus necator H16 from waste molasses Polyhydroxybutyrate ; Cupriavidus necator ; Biofabrication ; Polyhydroxyalkanoates ; Chemistry ; Bacteria ; Biology biodegradable polymer synthesis and properties ; Microplastics and Plastic Pollution ; Bone Tissue Engineering Materials
Authors: Tong Zhang | Wenhai Zhao | Qiqian Wu | Cong Yin | Mi Zhao | Zhidong Li | Liang Wu | Hui Zhang | Sheng’an Yang | Qingming Chen | Jianhong Yi | Ji Ma
Source: Journal of Alloys and Compounds (article, 2024-10-02)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Oxygen vacancy induced electrical conductivity enhancement in Ca-doped BiFeO3 thin films Electrical resistivity and conductivity ; Doping ; Thin film ; Materials science ; Oxygen ; Conductivity ; Vacancy defect ; Condensed matter physics ; Nanotechnology ; Chemistry ; Optoelectronics ; Physical chemistry ; Physics Multiferroics and related materials ; Transition Metal Oxide Nanomaterials ; Ferroelectric and Piezoelectric Materials
Authors: Shubo Li | Xuening Li | Chenchen Zhao | Han Li | Hongxing Liang | Shuo Wang | Chuantian Zhai | Wenbo Du
Source: Journal of Energy Storage (article, 2024-06-11)
Field: Materials Science — Biomaterials

Boosting the performance of primary Mg-air battery by regulating the second phase in the Mg-2Zn-0.2Ca anode Anode ; Boosting (machine learning) ; Primary (astronomy) ; Battery (electricity) ; Environmental science ; Materials science ; Automotive engineering ; Physics ; Computer science ; Chemistry ; Engineering ; Artificial intelligence ; Thermodynamics ; Physical chemistry Magnesium Alloys: Properties and Applications ; Hydrogen Storage and Materials ; Corrosion Behavior and Inhibition
Authors: Wendeng Li | Rui Wu | Hao Ruan | Bo-Wen Xiao | Xiang Gao | Huanfeng Jiang | Kai Chen | Tian‐Yu Sun | Shifa Zhu
Source: Angewandte Chemie International Edition (article, 2024-06-18)
Field: Chemistry — Organic Chemistry

Axial Ligand Enables Synthesis of Allenylsilane through Dirhodium(II) Catalysis Described herein is a dirhodium(II)-catalyzed silylation of propargyl esters with hydrosilanes, using tertiary amines as axial ligands. By adopting this strategy, a range of versatile and useful allenylsilanes can be achieved with good yields. This reaction not only represents a S<sub>N</sub>2'-type silylation of the propargyl derivatives bearing a terminal alkyne moiety to synthesize allenylsilanes from simple hydrosilanes, but also represents a new application of dirhodium(II) complexes in catalytic transformation of carbon-carbon triple bond. The highly functionalized allenylsilanes that are produced can be transformed into a series of synthetically useful organic molecules. In this reaction, an intriguing ON-OFF effect of the amine ligand was observed. The reaction almost did not occur (OFF) without addition of Lewis base amine ligand. However, the reaction took place smoothly (ON) after addition of only catalytic amount of amine ligand. Detailed mechanistic studies and density functional theory (DFT) calculations indicate that the reactivity can be delicately improved by the use of tertiary amine. The fine-tuning effect of the tertiary amine is crucial in the formation of the Rh-Si species via a concerted metalation deprotonation (CMD) mechanism and facilitating β-oxygen elimination. Ligand (biochemistry) ; Catalysis ; Chemistry ; Combinatorial chemistry ; Stereochemistry ; Organic chemistry ; Biochemistry ; Receptor Cyclopropane Reaction Mechanisms ; Catalytic C–H Functionalization Methods ; Catalytic Alkyne Reactions
Authors: Subarna Das | Debattam Sarkar | Kanishka Biswas
Source: Chemistry of Materials (article, 2024-03-27)
Field: Materials Science — Materials Chemistry

Enhanced Topological Surface State Mediated Transport Elevates Thermoelectric Performance in SnSb<sub>2</sub>Te<sub>4</sub> Quantum Material The discovery of topological quantum materials harboring Dirac-like massless surface states with high charge carrier mobility presents an exciting opportunity for unlocking superior thermoelectric (TE) performance, contingent upon accessing the unique properties of nontrivial topological surface states (TSS). However, harnessing these exotic TSS properties necessitates precise positioning of the Fermi level (EF) within the insulating bulk band gap. Unfortunately, inherent bulk defects often result in the EF being submerged deep into the bulk bands, rendering the contribution of TSS to electronic transport negligible. Herein, to address this challenge, we devised a novel strategy to augment TSS-mediated electronic transport in a topological insulator, SnSb2Te4, by fine-tuning the EF within the valence band through iodine (I) doping. Through extensive investigation of low-temperature electronic and magneto-transport, we have successfully demonstrated the systematic access to TSS upon I doping, unveiling fascinating quantum diffusive transport phenomena. Our findings reveal a gradual enhancement in the phase coherence length originating from TSS-mediated weak antilocalization, accompanied by a simultaneous reduction in bulk-state-dominated electron–electron interactions upon I doping, significantly elevating carrier mobility. Moreover, while aliovalent doping of I– at the Te2– site orchestrates an optimized p-type carrier concentration, leading to an amplified Seebeck coefficient, the introduction of I doping-induced point defects disrupts phonon propagation in the inherently low thermally conductive SnSb2Te4. As a result, we achieved a promising TE figure of merit of zT ∼0.55 in I-doped SnSb2Te4. Thermoelectric effect ; Materials science ; Condensed matter physics ; Thermoelectric materials ; Quantum well ; Physics ; Thermodynamics ; Quantum mechanics Advanced Thermoelectric Materials and Devices ; Topological Materials and Phenomena ; 2D Materials and Applications
Authors: Chandrika Ashwinikumar Pal | Yu-Lim Choi | Lakshmi Prasanna Lingamdinne | Rakesh Kulkarni | Zahid Husain Momin | Janardhan Reddy Koduru | Yoon‐Young Chang
Source: Chemical Engineering Journal (article, 2024-07-29)
Field: Chemistry — Analytical Chemistry

Plasma-modified viscose rayon activated carbon felt (VR-ACF) for Cu(II) and Cd(II) decontamination-mechanism and continuous-flow column operation Viscose ; Human decontamination ; Plasma ; Column (typography) ; Mechanism (biology) ; Activated carbon ; Chemical engineering ; Chemistry ; Materials science ; Chromatography ; Composite material ; Waste management ; Adsorption ; Organic chemistry ; Engineering ; Mechanical engineering Analytical chemistry methods development ; Semiconductor materials and devices ; Gas Sensing Nanomaterials and Sensors
Authors: Haoran Tang | Yuanying Liang | Chi‐Yuan Yang | Xi Luo | Jiangkai Yu | Kai Zhang | Simone Fabiano | Fei Huang
Source: Materials Horizons (article, 2024-01-01)
Field: Materials Science — Polymers and Plastics

Polyethylene glycol-decorated n-type conducting polymers with improved ion accessibility for high-performance organic electrochemical transistors High-performance n-type organic mixed ionic-electronic conductors (OMIECs) are essential for advancing complementary circuits based on organic electrochemical transistors (OECTs). Despite significant progress, current n-type OMIECs often exhibit lower transconductance and slower response times compared to their p-type counterparts, limiting the development of OECT-based complementary circuits. Optimizing the conjugated backbone and side chain structures of OMIECs is critical for enhancing both ion and electron transport efficiencies while maintaining a delicate balance between the two. In this study, hydrophilic polyethylene glycol (PEG) side chains were incorporated into the highly conductive n-type polymer poly(3,7-dihydrobenzo[1,2-<i>b</i>:4,5-<i>b</i>']difuran-2,6-dione) (PBFDO) backbone to achieve this goal. The incorporation of PEG chains improved ion accessibility, and by adjusting the PEG content, the electronic and ionic transport properties were fine-tuned, ultimately enhancing the performance of OECTs and related p-n complementary circuits. The n-type OECTs based on PBFDO-PEG50wt% demonstrated exceptional transfer characteristics, including a transient response time (<i>τ</i><sub>ON</sub>) as low as 72 μs, a high geometry-normalized transconductance exceeding 400 S cm<sup>-1</sup>, and an impressive <i>μC</i>* value surpassing 720 F cm<sup>-1</sup> V<sup>-1</sup> s<sup>-1</sup>. Notably, the use of PBFDO-PEG50wt% in a complementary inverter resulted in a voltage gain of 20 V/V, more than five times higher than that achieved with unmodified PBFDO (<4 V/V). These findings highlight the importance of balancing electron and ion transport characteristics in OMIECs to achieve high performance in OECTs and their associated circuits, and they validate PEG decoration as an effective approach. Polyethylene glycol ; Materials science ; Electrochemistry ; Polymer ; Transistor ; Polyethylene ; Ion ; Boosting (machine learning) ; Conductive polymer ; Nanotechnology ; Chemical engineering ; Electrode ; Composite material ; Chemistry ; Organic chemistry ; Voltage ; Electrical engineering ; Computer science Conducting polymers and applications ; Organic Electronics and Photovoltaics ; Advanced Sensor and Energy Harvesting Materials