jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Shuang Liu | Bingchen Huo | Cun‐Yue Guo
Source: Materials (review, 2024-07-16)
Field: Materials Science — Materials Chemistry

Progress on Material Design and Device Fabrication via Coupling Photothermal Effect with Thermoelectric Effect Recovery and utilization of low-grade thermal energy is a topic of universal importance in today's society. Photothermal conversion materials can convert light energy into heat energy, which can now be used in cancer treatment, seawater purification, etc., while thermoelectric materials can convert heat energy into electricity, which can now be used in flexible electronics, localized cooling, and sensors. Photothermoelectrics based on the photothermal effect and the Seebeck effect provide suitable solutions for the development of clean energy and energy harvesting. The aim of this paper is to provide an overview of recent developments in photothermal, thermoelectric, and, most importantly, photothermal-thermoelectric coupling materials. First, the research progress and applications of photothermal and thermoelectric materials are introduced, respectively. After that, the classification of different application areas of materials coupling photothermal effect with thermoelectric effect, such as sensors, thermoelectric batteries, wearable devices, and multi-effect devices, is reviewed. Meanwhile, the potential applications and challenges to be overcome for future development are presented, which are of great reference value in waste heat recovery as well as solar energy resource utilization and are of great significance for the sustainable development of society. Finally, the challenges of photothermoelectric materials as well as their future development are summarized. Fabrication ; Materials science ; Thermoelectric effect ; Photothermal therapy ; Coupling (piping) ; Nanotechnology ; Optoelectronics ; Composite material ; Mechanical engineering ; Engineering physics ; Engineering Advanced Thermoelectric Materials and Devices ; Thermal properties of materials ; Thermal Radiation and Cooling Technologies
Authors: Meisam Dabiri Havigh | Kristof Marcoen | Benny Wouters | Noël Hallemans | Martin Bojinov | Tom Hauffman | John Lataire | Herman Terryn | Annick Hubin
Source: Electrochimica Acta (article, 2024-05-08)
Field: Materials Science — Materials Chemistry

Application of operando ORP-EIS for the in-situ monitoring of acid anion incorporation during anodizing Anodizing ; In situ ; Ion ; Chemistry ; Inorganic chemistry ; Organic chemistry ; Aluminium Anodic Oxide Films and Nanostructures ; Concrete Corrosion and Durability ; Smart Materials for Construction
Authors: Yaohui Xu | Qin Wang | Yuting Li | Zhao Ding
Source: Catalysts (article, 2024-12-02)
Field: Materials Science — Materials Chemistry

Magnetic Ternary Hybrid Composites as an Efficient Photocatalyst for Degradation of Acid Orange 7 Dye Based on the photocatalytic activity and magnetic nature of magnetite and goethite, as well as the oxygen storage characteristic of cerianite, a magnetic ternary hybrid composite including cubic CeO2, cubic Fe3O4 and orthorhombic FeOOH, designated as Fe3O4/FeOOH/CeO2, was successfully synthesized with different Ce:Fe molar ratios using a simple hydrothermal route without subsequent calcination process, and employed as photocatalysts for the degradation of Acid Orange 7 (AO7) dye. The absorption range of light by the Fe3O4/FeOOH/CeO2 composites was broadened, and the intensity was enhanced. Furthermore, there existed a possibility of hybridization and doping among the three crystalline structures, with the elements Ce, Fe and O exhibiting a uniform distribution, significantly enhancing the photocatalytic efficiency of the Fe3O4/FeOOH/CeO2 composites in promoting the photodegradation of AO7. The magnetic response behaviors of hybrid composites synthesized with different Ce:Fe molar ratios were investigated. The adsorptive degradation of AO7 in darkness and the photocatalytic degradation of AO7 under UV light illumination were evaluated. Moreover, ten cycling runs of the photocatalytic degradation of AO7 under simulated UV illumination of Fe3O4/FeOOH/CeO2 synthesized with a Ce:Fe molar ratio of 1:15 were performed. The hybrid ternary composites were proved to have excellent magnetic sensitivity, exhibited outstanding photocatalytic activities and demonstrated remarkable stability. It is anticipated that magnetic Fe3O4/FeOOH/CeO2 ternary hybrid composites may have potential applications in the treatment of organic dye sewage. Ternary operation ; Degradation (telecommunications) ; Materials science ; Composite material ; Orange (colour) ; Photocatalysis ; Chemistry ; Organic chemistry ; Computer science ; Telecommunications ; Food science ; Catalysis Advanced Nanomaterials in Catalysis ; Advanced Photocatalysis Techniques ; Nanomaterials for catalytic reactions
Authors: Dipanjana Choudhury | Ching Ching Lam | Nadia L. Farag | Jonathan Slaughter | Andrew D. Bond | Jonathan M. Goodman | Dominic S. Wright
Source: Chemistry - A European Journal (article, 2024-03-13)
Field: Chemistry — Organic Chemistry

Suppressing <i>Cis</i>/<i>Trans</i> ‘Ring‐Flipping’ in Organoaluminium(III)‐2‐Pyridyl Dimers–Design Strategies Towards Lewis Acid Catalysts for Alkene Oligomerisation Owing to its high natural abundance compared to the commonly used transition (precious) metals, as well as its high Lewis acidity and ability to change oxidation state, aluminium has recently been explored as the basis for a range of single-site catalysts. This paper aims to establish the ground rules for the development of a new type of cationic alkene oligomerisation catalyst containing two Al(III) ions, with the potential to act co-operatively in stereoselective assembly. Five new dimers of the type [R<sub>2</sub>Al(2-py')]<sub>2</sub> (R=Me, <sup>i</sup>Bu; py'=substituted pyridyl group) with different substituents on the Al atoms and pyridyl rings have been synthesised. The formation of the undesired cis isomers can be suppressed by the presence of substituents on the 6-position of the pyridyl ring due to steric congestion, with DFT calculations showing that the selection of the trans isomer is thermodynamically controlled. Calculations show that demethylation of the dimers [Me<sub>2</sub>Al(2-py')]<sub>2</sub> with Ph<sub>3</sub>C<sup>+</sup> to the cations [{MeAl(2-py')}<sub>2</sub>(μ-Me)]<sup>+</sup> is highly favourable and that the desired trans disposition of the 2-pyridyl ring units is influenced by steric effects. Preliminary experimental studies confirm that demethylation of [Me<sub>2</sub>Al(6-MeO-2-py)]<sub>2</sub> can be achieved using [Ph<sub>3</sub>C][B(C<sub>6</sub>F<sub>5</sub>)<sub>4</sub>]. Alkene ; Catalysis ; Ring (chemistry) ; Chemistry ; Lewis acids and bases ; Polymer chemistry ; Organic chemistry Organometallic Complex Synthesis and Catalysis ; Coordination Chemistry and Organometallics ; Synthesis and characterization of novel inorganic/organometallic compounds
Authors: Serdar Halis | Nisa Nur Atak | Battal Doğan
Source: International Journal of Energy Studies (article, 2024-03-13)
Field: Materials Science — Materials Chemistry

Investigation of the performance of cathode supported solid oxide fuel cell with energy and exergy analysis at different operating temperatures In this research, the performance analysis of a cathode-supported solid oxide fuel cell (SOFC) with an active cell area of 0.0834 m2 and a cathode thickness of 750 µm was carried out under three different operating temperatures (973 K, 1073 K and 1173 K). The power density and cell potential were calculated by determining the losses in the cell at 8 different current densities (1500 A/m2 - 5000 A/m2) for each operating temperature. It was observed that ohmic losses in SOFC have a lower effect on the cell potential compared to other losses. An increase of the operating temperature by 100 K resulted in a decrease in ohmic losses of 3.36×10-8 V under constant current density (CD). In addition, the rise in CD negatively affected all the losses in the cell and decreased the cell voltage. The exergy and energy analysis of SOFC was carried out by calculating the thermal efficiency, exergy destruction, entropy production and exergy efficiency for various operating parameters. An increment of 200 K in the operating temperature increased the thermal efficiency by approximately 2 times at a CD of 5000 A/m2. Also, the minimum entropy production was obtained at an operating temperature of 1173 K and a CD of 1500 A/m2. In this case, the entropy production was calculated as 2.63 kW/K, resulting in a maximum exergy efficiency of 66.93%. Exergy ; Exergy efficiency ; Cathode ; Operating temperature ; Solid oxide fuel cell ; Materials science ; Nuclear engineering ; Analytical Chemistry (journal) ; Thermodynamics ; Power density ; Ohmic contact ; Chemistry ; Electrical engineering ; Electrode ; Composite material ; Physics ; Anode ; Power (physics) ; Engineering Advancements in Solid Oxide Fuel Cells ; Electrocatalysts for Energy Conversion ; Fuel Cells and Related Materials
Authors: Zhe Cheng | Xiaoyang Ji | Zifeng Huang | Yutaka Ohno | Koji Inoue | Yasusyohi Nagai | Yoshiki Sakaida | Hiroki Uratani | Naoteru Shigekawa | Jianbo Liang
Source: arXiv (Cornell University) (preprint, 2024-04-14)
Field: Materials Science — Materials Chemistry

Interfacial reaction boosts thermal conductance of room-temperature integrated semiconductor interfaces stable up to 1100 C Overheating has emerged as a primary challenge constraining the reliability and performance of next-generation high-performance electronics, such as chiplets and (ultra)wide bandgap electronics. Advanced heterogeneous integration not only constitutes a pivotal technique for fabricating these electronics but also offers potential solutions for thermal management. This study presents the integration of high thermal conductivity semiconductors, specifically, 3C-SiC thin films and diamond substrates, through a room-temperature surface-activated bonding technique. Notably, the thermal conductivity of the 3C-SiC films is among the highest for all semiconductor films which can be integrated near room temperature with similar thicknesses. Furthermore, following annealing, the interfaces between 3C-SiC and diamond demonstrate a remarkable enhancement in thermal boundary conductance (TBC), reaching up to approximately 300%, surpassing all other grown and bonded heterointerfaces. This enhancement is attributed to interfacial reactions, specifically the transformation of amorphous silicon into SiC upon interaction with diamond, which is further corroborated by picosecond ultrasonics measurements. Subsequent to annealing at 1100 C, the achieved TBC (150 MW/m2-K) is record-high among all bonded diamond interfaces. Additionally, the visualization of large-area TBC, facilitated by femtosecond laser-based time-domain thermoreflectance measurements, shows the uniformity of the interfaces which are capable of withstanding temperatures as high as 1100 C. Our research marks a significant advancement in the realm of thermally conductive heterogeneous integration, which is promising for enhanced cooling of next-generation electronics. Materials science ; Diamond ; Semiconductor ; Thermal conductivity ; Optoelectronics ; Electronics ; Nanotechnology ; Amorphous solid ; Femtosecond ; Silicon ; Annealing (glass) ; Wide-bandgap semiconductor ; Engineering physics ; Composite material ; Optics ; Laser ; Electrical engineering ; Crystallography Thermal properties of materials ; Diamond and Carbon-based Materials Research ; Adhesion, Friction, and Surface Interactions
Authors: Francesco Zaccaria | Antonio Vittoria | Giuseppe Antinucci | Roberta Cipullo | Vincenzo Busico
Source: Polymers (article, 2024-12-28)
Field: Chemistry — Organic Chemistry

α-Olefin Oligomerization Mediated by Group 4 Metallocene Catalysts: An Extreme Manifestation of the Multisite Nature of Methylaluminoxane Group 4 metallocenes are competent catalysts for the oligomerization of higher α-olefins. Among the many chemical and physical variables of importance in the process, one is the choice of cocatalyst (activator). The impact of various activators on the performance of a representative catalyst, (nBuCp)<sub>2</sub>ZrCl<sub>2</sub>, in the oligomerization of 1-octene was thoroughly investigated; in particular, the molecular weight distribution (MWD) of the oligomers was determined by means of high-resolution high performance liquid chromatography (HR-HPLC). Unexpectedly, a bimodal MWD was highlighted when the precatalyst was activated with methylaluminoxane (MAO), whereas a single Schulz-Flory (SF) MWD was observed with borate salts. The presence of Al centers with different Lewis acidity in the complex and ill-defined structure of MAO is well known, and the broadening effects on the MWD of olefin polymerization products made with metallocene/MAO catalyst systems have been reported before. However, to the best of our knowledge, clear HR-HPLC evidence of two active species resulting from activation with MAO of one single zirconocene precursor, yielding two discrete SF product distributions, is unprecedented. By varying the polarity of the reaction medium, we managed to modulate the MWD of the oligomers from bimodal to monomodal, even with MAO, thus demonstrating that ion pairing effects are behind these unusual findings. Methylaluminoxane ; Metallocene ; Olefin fiber ; Post-metallocene catalyst ; Catalysis ; Group (periodic table) ; Polymer chemistry ; Materials science ; Organic chemistry ; Chemistry ; Polymerization ; Polymer Organometallic Complex Synthesis and Catalysis ; Synthetic Organic Chemistry Methods ; Carbon dioxide utilization in catalysis
Authors: Yifan Qi | Luke T. Jesikiewicz | Grace Scofield | Peng Liu | Kay M. Brummond
Source: ACS Catalysis (article, 2024-11-05)
Field: Chemistry — Organic Chemistry

Systematic Parameter Determination Aimed at a Catalyst-Controlled Asymmetric Rh(I)-Catalyzed Pauson–Khand Reaction Transition metal-catalyzed carbocyclization reactions have revolutionized the synthesis of complex cyclic organic compounds. Yet, subtle substrate changes can significantly alter reaction pathways. The asymmetric Rh(I)-catalyzed Pauson<b>-</b>Khand reaction (PKR) exemplifies such a reaction, hindered by a narrow substrate scope and competing reactivity modes. In this study, we identified parameters predictive of the yield and enantioselectivity in the catalyst-controlled asymmetric PKR, using 1,6-enynes with a 2,2-disubstituted alkene. In this way, ring-fused cyclopentenones can be formed with chiral quaternary carbon centers. Using bisphosphine ligand parameters from palladium complexes, including the energy of the Pd lone pair orbital and the angle formed by the phosphorus aryl groups on the ligand, we established strong correlations with experimental ln(<i>er</i>) (<i>R</i> <sup>2</sup> = 0.99 and 0.91) for two distinct precursors. Solvent dipole moments correlated with ln(<i>er</i>) for high-dipole-moment precursors (<i>R</i> <sup>2</sup> = 0.94), while Abraham's hydrogen bond basicity is more relevant for low-dipole-moment precursors (<i>R</i> <sup>2</sup> = 0.93). Additionally, counterions were found to have a significant impact on the PKR reactivity and selectivity, as does the steric demand of the alkyne substituent of the enyne precursor. In the latter case, ln(<i>er</i>) correlates with Sterimol B<sub>1</sub> values for products from different alkyne substituents (<i>R</i> <sup>2</sup> = 0.99). Furthermore, the computed C≡C wavenumber of the enyne precursor can be directly aligned with the yield of asymmetric PKRs. Catalysis ; Pauson–Khand reaction ; Chemistry ; Combinatorial chemistry ; Organic chemistry Catalytic Alkyne Reactions ; Asymmetric Hydrogenation and Catalysis ; Cyclopropane Reaction Mechanisms
Authors: Gao-Sheng Zhu | Yi Jia | Jia-Yao Ding | Hao Yin | Yan Chen | Baoyi Yu | Yanying Zheng | Francis Verpoort
Source: Inorganics (article, 2024-03-22)
Field: Chemistry — Spectroscopy

Design and Construction of a Mixed-Ligand Coordinated Fluorescent Complex and Its Application for Sensing Ions, Antibiotics, and Pesticides in Aqueous Solution In this work, a fluorescent complex [Zn(NTD)2(DTP)2(H2O)2]·(H2O)0.8 (Complex Zn), (H2NTD = 1,4-naphthalenedicarboxylic acid and DTP = 3,5-di(1,2,4-triazol-1-yl)pyridine) was synthesized. The fluorescent complex was characterized by single-crystal X-ray diffraction, powder X-ray diffraction, and thermogravimetric, elemental, infrared spectroscopy, and fluorescence analyses. In the fluorescence sensing tests, Complex Zn exhibited excellent fluorescence quenching efficiency towards Fe3+, MnO4−, Cr2O72−, nitrofurantoin, and imidacloprid in aqueous media. A mechanism investigation suggested that the fluorescence quenching caused by the quenchers toward the sensor was due to the inner filter effect and the fluorescence resonance energy transfer effect in the fluorescent sensing process. Aqueous solution ; Fluorescence ; Pesticide ; Ligand (biochemistry) ; Ion ; Chemistry ; Combinatorial chemistry ; Computer science ; Biochemical engineering ; Nanotechnology ; Environmental chemistry ; Materials science ; Engineering ; Ecology ; Organic chemistry ; Physics ; Biology ; Biochemistry Molecular Sensors and Ion Detection ; Metal complexes synthesis and properties ; Analytical Chemistry and Chromatography
Authors: Manasa R. Shankar | A. N. Prabhu | Tulika Srivastava
Source: Materials Advances (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Bismuth and tellurium co-doping: a route to improve thermoelectric efficiency in InSe polycrystals Bi and Te co-doping in InSe leads to enhanced electrical transport properties and reduced thermal conductivity results in significant improvement in the power factor and ZT , making InSe a promising material for thermoelectric applications. Tellurium ; Bismuth ; Thermoelectric effect ; Doping ; Materials science ; Thermoelectric materials ; Optoelectronics ; Engineering physics ; Metallurgy ; Thermal conductivity ; Composite material ; Physics ; Thermodynamics Advanced Thermoelectric Materials and Devices ; Chalcogenide Semiconductor Thin Films ; Solid-state spectroscopy and crystallography
Authors: Alex L. Suherman | Ziwen Zhao | Alina Sekretareva
Source: Current Opinion in Electrochemistry (article, 2024-05-01)
Field: Chemistry — Electrochemistry

From protein film to single-entity protein electrochemistry This mini-review discusses recent advancements in the single-entity electrochemistry technique for the analysis of catalytic activities of single redox protein molecules, highlighting papers of interest from the past three years. The diverse detection and experimental strategies, as well as the theoretical frameworks enabling the analysis of experimental data, are presented. Additionally, insights that can be obtained from comparing single-entity protein electrochemistry with protein film electrochemistry data are discussed. Electrochemistry ; Nanotechnology ; Chemistry ; Materials science ; Electrode Electrochemical Analysis and Applications ; Electrochemical sensors and biosensors ; Molecular Junctions and Nanostructures
Authors: Nan Li | Shiyu Gu | Qi Wu | Jinrong Wu
Source: RSC Applied Polymers (article, 2024-12-13)
Field: Materials Science — Polymers and Plastics

Shear-stiffening supramolecular polymers: fabrication, modification and application This review outlines the progress of SSSPs from fabrications and structures to modifications and applications since the advent of polyborosiloxane. Stiffening ; Fabrication ; Materials science ; Shear (geology) ; Polymer ; Supramolecular polymers ; Composite material ; Supramolecular chemistry ; Polymer science ; Chemistry ; Crystal structure ; Crystallography Polymer composites and self-healing ; Silicone and Siloxane Chemistry ; Polymer Nanocomposites and Properties
Authors: Xu Li | Yan Jin | Jinghua Yin | Nansong Zhu | Long Yi Jin
Source: Preprints.org (preprint, 2024-02-12)
Field: Chemistry — Inorganic Chemistry

Recent Developments of Fluorescence Sensors Constructed from Pillar[n]arene-based Supramolecular Architectures Containing Metal Coordination Sites The field of fluorescence sensing, leveraging various supramolecular self-assembled architectures constructed from macrocyclic pillar[n]arenes, has seen significant advancement in recent decades. This review comprehensively discusses, for the first time, the recent innovations in the synthesis and self-assembly of pillar[n]arene-based supramolecular architectures (PSAs) containing metal coordination sites, along with their practical applications and prospects in fluorescence sensing. Integrating hydrophobic and electron-rich cavities of pillar[n]arenes into these supramolecular structures endow the entire system with self-assembly behavior and stimulus responsiveness. Employing the host–guest interaction strategy coupled with complementary coordination forces, PSAs exhibiting both intelligent and controllable properties are successfully constructed. This provides a broad horizon for advancing fluorescence sensors capable of detecting environmental pollutants. This review aims to establish a solid foundation for the future development of fluorescence sensing applications utilizing PSAs. Additionally, current challenges and future perspectives in this field are discussed. Pillar ; Supramolecular chemistry ; Fluorescence ; Nanotechnology ; Metal ; Materials science ; Chemistry ; Crystallography ; Engineering ; Physics ; Crystal structure ; Metallurgy ; Optics Metal-Organic Frameworks: Synthesis and Applications ; Molecular Sensors and Ion Detection ; Supramolecular Chemistry and Complexes
Authors: Jonathan Y. C. Ting | George Opletal | Amanda S. Barnard
Source: Catalysis Science & Technology (article, 2024-01-01)
Field: Materials Science — Materials Chemistry

Unsupervised pattern recognition on the surface of simulated metal nanoparticles for catalytic applications The structural patterns and catalytic activities of the surface atoms of simulated metal nanoparticles are characterised by an automatable data-driven unsupervised machine learning approach. Catalysis ; Nanoparticle ; Surface (topology) ; Metal ; Materials science ; Nanotechnology ; Computer science ; Chemistry ; Organic chemistry ; Metallurgy ; Mathematics Machine Learning in Materials Science ; Neural Networks and Applications ; Machine Learning and ELM