jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Yunhan Li | Can Su | Fanghui Hu | Jiahuan Ling | Zhidong Zhang | Lihui Zhang
Source: SSRN Electronic Journal (preprint, 2024-01-01)
Field: Materials Science — Biomaterials

Transforming Poly(Butylene Adipate-Co-Terephthalate) into Protocatechuic Acid Via Enzymatic Degradation and Whole-Cell Catalysis Adipate ; Protocatechuic acid ; Degradation (telecommunications) ; Catalysis ; Chemistry ; Enzyme ; Biochemistry ; Polymer chemistry ; Computer science biodegradable polymer synthesis and properties ; Microplastics and Plastic Pollution ; Biofuel production and bioconversion
Authors: Jin Hong Yap | Hong Zhang | Yosuke Okamura | Hiroshi Kimura
Source: SSRN Electronic Journal (preprint, 2024-01-01)
Field: Materials Science — Biomaterials

Thin Microporous Polydimethylsiloxane Membrane Prepared by Phase Separation and its Applications for Cell Culture Polydimethylsiloxane ; Microporous material ; Membrane ; Materials science ; Chemical engineering ; Phase (matter) ; Nanotechnology ; Chemistry ; Organic chemistry ; Composite material ; Engineering Electrospun Nanofibers in Biomedical Applications
Authors: Pravrati Taank | Asif Ali | Aravind Raji | Ajay K. Poonia | Matthew C. Beard | Ravi Shankar Singh | K. V. Adarsh
Source: Physical review. B./Physical review. B (article, 2024-08-26)
Field: Materials Science — Materials Chemistry

High-temperature observation of intralayer, interlayer, and Rydberg excitons in bulk van der Waals alloy single crystals Transition metal dichalcogenides exhibit remarkable optical properties due to the diverse number of strongly bound excitons, which can be fine-tuned by alloying. Despite a flurry of research activity in characterizing these excitons, a comprehensive and profound understanding of their behavior with temperature is lacking. Here, we report the rich spectrum of excitonic features within bulk van der Waals alloy ${\mathrm{Mo}}_{0.5}{\mathrm{W}}_{0.5}{\mathrm{S}}_{2}$ and ${\mathrm{Mo}}_{0.5}{\mathrm{W}}_{0.5}{\mathrm{Se}}_{2}$ single crystals through temperature-dependent reflectance spectroscopy and first-principles calculations. We observed Rydberg excitons and interlayer excitons in both the single crystals. Notably, we provide the first experimental evidence of highly energetic ${\mathrm{A}}^{\ensuremath{'}}$ and ${\mathrm{B}}^{\ensuremath{'}}$ excitons in ${\mathrm{Mo}}_{0.5}{\mathrm{W}}_{0.5}{\mathrm{S}}_{2}$ at room temperature. The strong carrier-phonon scattering significantly broadens the ${\mathrm{A}}^{\ensuremath{'}}, {\mathrm{B}}^{\ensuremath{'}}$, and interlayer excitons at room temperature in bulk ${\mathrm{Mo}}_{0.5}{\mathrm{W}}_{0.5}{\mathrm{S}}_{2}$ single crystal compared to its selenide. Our findings, supported by density functional theory and Bethe-Salpeter equation calculations, signify the crucial role of carrier-phonon interactions. These results open pathways for next-generation optoelectronic devices and quantum technologies operating at high temperature. Exciton ; van der Waals force ; Alloy ; Condensed matter physics ; Materials science ; Rydberg formula ; Crystallography ; Chemistry ; Physics ; Quantum mechanics ; Composite material ; Molecule 2D Materials and Applications ; Graphene research and applications ; Topological Materials and Phenomena
Authors: Marcella Balordi | Alessandro Casali | Paolo Gadia | Paolo Pelagatti | Francesco Pini | Giorgio Santucci de Magistris
Source: Coatings (article, 2024-07-18)
Field: Materials Science — Surfaces, Coatings and Films

Effects of Precursors Ratio and Curing Treatment on the Icephobicity of Polydimethylsiloxane Elastomers are intriguing materials for many applications, one of these being icephobic coatings. Elastic modulus and work of adhesion are the key parameters coming into play in ice detachment mechanisms, and can be related to hardness and wettability. Polydimethylsiloxane (PDMS) is widely used for anti-ice applications; however, not many works deal with the correlation between cross-linking grade, curing treatments, and icephobicity. This study focuses on PDMS (Sylgard184®) coatings, encompassing four different pre-polymer to cross-linking agent (A:B) ratios ranging from 5:1 to 30:1, and nine curing treatments. The results indicate that increasing the A:B ratio enhances hydrophobicity, softness, and icephobicity, assessed through shear stress measurements. Curing treatments primarily affect hardness and icephobicity, with longer heat treatments resulting in higher hardness and ice adhesion. All samples exhibit promising performances in lowering shear stress values, up to seven times in respect to the uncoated reference for 30:1 ratio. Additionally, a durability assessment is conducted on samples exposed to stress tests in the climatic chamber. A slight deterioration in hydrophobicity across all samples is observed and, notably, a significant hardness increase, around 13%, is experienced for the 5:1 ratio only. The samples also demonstrate an overall robust icephobicity after stress tests, and, for the 30:1 ratio, an average shear stress value four times lower than the reference is maintained. In this work, we highlight the importance of the fine-tuning of the precursors ratio and thermal treatments on the PDMS properties and durability. Materials science ; Polydimethylsiloxane ; Composite material ; Curing (chemistry) ; Durability ; Wetting ; Elastomer ; Polymer ; Shear stress ; Modulus Surface Modification and Superhydrophobicity ; Icing and De-icing Technologies ; Advanced Sensor and Energy Harvesting Materials
Authors: Sanjoy Khawas | Suman Bhattacharjee | Sabyasachi Mukherjee | Anirban Sain | Sunita Srivastava
Source: SSRN Electronic Journal (preprint, 2024-01-01)
Field: Materials Science — Materials Chemistry

Directing the Formation of Tunable Superlattice Crystalline Phases from Anisotropic Nanoparticles Nanorod ; Materials science ; Superlattice ; Nanotechnology ; Substrate (aquarium) ; Particle (ecology) ; Liquid crystal ; Nanoparticle ; Chemical physics ; Pulmonary surfactant ; Nanoscopic scale ; Nanocrystal ; Chemical engineering ; Chemistry ; Optoelectronics Pickering emulsions and particle stabilization ; Liquid Crystal Research Advancements ; Advanced Materials and Mechanics
Authors: Kai Zhang | Xiaoman Lin | Tongyu Wang | Yu Qiao | Yihui Xie | Jian Chen | Jiaoyu Wang | Zhongfan Jia | Li Zhang
Source: Research Square (preprint, 2024-09-11)
Field: Materials Science — Materials Chemistry

Adjustable current-responsive photoswitches based on azobenzene derivatives Photoswitch ; Azobenzene ; Chemistry ; Molecule ; Photochemistry Photochromic and Fluorescence Chemistry ; Photoreceptor and optogenetics research ; Porphyrin and Phthalocyanine Chemistry
Authors: Dennis Berends | Patrick Schwager | Kai Gehrke | Martin Vehse | Carsten Agert
Source: ACS Omega (article, 2024-03-21)
Field: Materials Science — Materials Chemistry

Analysis of the Inhomogeneous Growth of Sputtered Black TiO<sub>2</sub> Thin Films Black titanium dioxide (B-TiO<sub>2</sub>) is a highly active photoelectrochemical material compared to pure titanium dioxide due to its increased light absorption properties. Recently, we presented the deposition of thin-film B-TiO<sub>2</sub> using an asymmetric bipolar reactive magnetron sputter process. The resulting samples exhibit excellent photoelectrochemical properties, which can be fine-tuned by varying the process parameters. In this article, results of morphological, electrical, and photoelectrochemical measurements are discussed to better understand the surprisingly high electrochemical activity of the films. In order to study the influence of the dynamic process on film formation, we use static sputtering with a fixed substrate covering the entire chamber area in front of the two targets. This allows the material composition of the sputtered film to be analyzed depending on its relative position to the targets. The results lead to the conclusion that the asymmetric bipolar sputtering mainly produces two phases, a transparent, nonconductive crystalline phase and a black, conductive amorphous phase. As a consequence, the dynamically sputtered samples are multilayers of these two materials. We discuss that the significantly better electrical and photoelectrochemical properties emerge from the inhomogeneous nature of the laminates, like also found in core-shell nanoparticles of B-TiO<sub>2</sub>. Materials science ; Sputtering ; Amorphous solid ; Thin film ; Sputter deposition ; Substrate (aquarium) ; Titanium dioxide ; Deposition (geology) ; Titanium ; Phase (matter) ; Absorption (acoustics) ; Optoelectronics ; Chemical engineering ; Composite material ; Nanotechnology ; Metallurgy ; Chemistry ; Crystallography ZnO doping and properties ; Advanced Photocatalysis Techniques ; TiO2 Photocatalysis and Solar Cells
Authors: Kannan Ramaiyan | Angelica Benavidez | Fernando H. Garzón
Source: ECS Meeting Abstracts (article, 2024-11-22)
Field: Materials Science — Materials Chemistry

Diagnosing the Nature of Oxygen Site in Yttrium Doped Barium Calcium Niobates and Its Impact Towards Electrochemical Oxidative Coupling of Methane Effective conversion of methane into value added chemicals such as ethylene will help reduce its venting and flaring from oil and gas wells. Oxidative coupling of methane (OCM) is shown to produce ethylene although over oxidation products such as CO 2 and CO reduce the C2 hydrocarbon selectivity. The industrial target for OCM process is a single pass conversion of at least 30% and a C2 selectivity around 80% although catalysts with satisfactory performance has not been identified yet despite four decades of intense research. 1 Electrochemical OCM is recently gaining renewed interest due the ability to control the conversion rate and product selectivity though temperature and applied potential. We demonstrated a potential dependent C2 selectivity using Fe and Ca codoped barium niobates as E-OCM catalysts. 2–4 However, introduction of yttrium as a dopant in barium calcium niobate (BCNY) resulted in a remarkable change in its electrical conductivity and methane activation properties. We present our results on BCNY’s methane activation properties and possible correlation between the nature of oxygen species in the BCNY crystal matrix. Electrical conductivity measurements, E-OCM measurements and temperature programed reactions in oxidizing and reducing conditions are utilized to establish the role of yttrium and compare with other transition metal dopants such as Fe and Ni. References Zavyalova U, Holena M, Schlögl R, Baerns M. Statistical Analysis of Past Catalytic Data on Oxidative Methane Coupling for New Insights into the Composition of High-Performance Catalysts. ChemCatChem . 2011;3(12):1935-1947. doi:10.1002/cctc.201100186 Ramaiyan K, Denoyer LH, Benavidez A, Garzon FH. Role of Dopants in Fine-Tuning the Electrical and Catalytic Properties of Barium Niobate Perovskites Towards High-Temperature Electrolyzer Application. ECS Trans . 2023;111(6):1139. doi:10.1149/11106.1139ecst Denoyer LH, Benavidez A, Garzon FH, Ramaiyan KP. Highly Stable Doped Barium Niobate Based Electrocatalysts for Effective Electrochemical Coupling of Methane to Ethylene. Adv Mater Interfaces . 2022;9(27):2200796. doi:10.1002/admi.202200796 Denoyer LH, Benavidez A, Brearley A, Ramaiyan K, Garzon FH. Chemical Stability of BaMg0.33Nb0.67-XFexO3-δ in High Temperature Methane Conversion Environments. ECS Trans . 2023;111(6):587. doi:10.1149/11106.0587ecst Barium ; Yttrium ; Oxygen ; Methane ; Doping ; Materials science ; Oxidative coupling of methane ; Coupling (piping) ; Calcium ; Inorganic chemistry ; Chemistry ; Metallurgy ; Optoelectronics ; Oxide Advancements in Solid Oxide Fuel Cells ; Gas Sensing Nanomaterials and Sensors
Authors: В. А. Мозгова | Н. Г. Бичан | Е. Н. Овченкова | Е. В. Моторина | М. С. Груздев | Т. Н. Ломова
Source: Russian Journal of Physical Chemistry A (article, 2024-12-01)
Field: Materials Science — Materials Chemistry

Equilibria and Rates of Formation of New Donor-Acceptor Systems Based on the Porphyrin Complex of Cobalt(II) and Fulleropyrrolidine Donor-acceptor systems containing metalloporphyrin as an electron-donor component exhibit the property of photoinduced electron transfer (PET), which makes them promising in obtaining materials for optoelectronics. In a search for new perspective systems with PET we have performed experimental studies of interactions between the newly synthesized (5,15-bis(4,6-dichloropyrimidin-5-yl)-10,20-bis(2,4,6-trimethylphenyl)porphinato)cobalt(II) (CoPCl4) and 1-methyl-2-(pyridin-4'-yl)-3,4-fullero[60]pyrrolidine (PyC60) in toluene at 298 K. The process parameters were obtained, and a complete kinetic description is presented. The process occurs stepwise as reversible and irreversible reactions and ends with the formation of the donor-acceptor triad (PyC60)2CoPCl4 via the formation of an intermediate product—the dyad (PyC60)CoPCl4. The composition and structure of the triad are substantiated using UV-visible, IR, and 1H NMR spectroscopy and MALDI-TOF mass spectrometry data. A comparative analysis was performed of the quantitative parameters of the (PyC60)2CoPCl4 formation reaction with those for structural analogs previously described in the literature; the formation constants of the triads were correlated with their structure, which is important for fine tuning of the properties of functional materials based on them. Porphyrin ; Cobalt ; Acceptor ; Chemistry ; Photochemistry ; Inorganic chemistry ; Physics ; Condensed matter physics Porphyrin and Phthalocyanine Chemistry ; Supramolecular Chemistry and Complexes ; Luminescence and Fluorescent Materials
Authors: Fangjiu He | Hu Zhi | Yuncheng Xu | Mengyi Liu | Jingxian Zhang | Zibiao Zhong | Qifa Ye | Xiaowen Shi
Source: SSRN Electronic Journal (preprint, 2024-01-01)
Field: Materials Science — Materials Chemistry

Hofmeister Effect-Assisted One Step Electro-Fabrication of Bionic Janus Gelatin Hydrogel Janus ; Gelatin ; Fabrication ; Nanotechnology ; Hofmeister series ; Materials science ; Chemistry ; Chemical engineering ; Engineering ; Organic chemistry ; Medicine ; Ion Pickering emulsions and particle stabilization ; Advanced Materials and Mechanics
Authors: Songtao Qu | Yang Gao
Source:  (article, 2024-11-21)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Tunable Absorber in the Terahertz Band Based on Black Phosphorus This paper presents a novel tunable absorber design based on black phosphorus (BP) for regulating light absorption within a specific frequency range. The structure is made up of monolayer of BP, silicon photonic crystal, and perfect electric conductor (PEC) reflective layer. Investigate its absorption characteristics using the finite-difference time-domain (FDTD) method. The study shows that this absorber can achieve significant absorption enhancement within a specific narrow band. This enhancement mechanism is attributed to the physical principle of critical coupling. Further analysis indicates that the absorption performance largely depends on the polarization state of light, with distinctly different absorption peaks observed under TE and TM polarization. By fine-tuning the structure, incident angle, and polarization angle, the absorption characteristics can be effectively controlled. Moreover, by adjusting the electron doping concentration of the BP layer and changing the surrounding refractive index, the adaptability and tunability of the device can be enhanced. These findings are not only significant for understanding the operational mechanism of BP in optoelectronic applications but also provide an experimental basis and design insights for the development of novel tunable optoelectronic devices. Terahertz radiation ; Black phosphorus ; Optoelectronics ; Phosphorus ; Materials science ; Terahertz spectroscopy and technology ; Metallurgy Metamaterials and Metasurfaces Applications ; Terahertz technology and applications ; Photonic and Optical Devices
Authors: Maria C. Barrero-Moreno | A.M. Garay-Tapia
Source: FlatChem (article, 2024-06-26)
Field: Materials Science — Materials Chemistry

Exploring magnetic space groups of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si137.svg"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="italic">Cr</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mi>N</mml:mi></mml:mrow></mml:math> MXene and its connection to vibrational and electronic properties Materials science MXene and MAX Phase Materials ; 2D Materials and Applications ; Advanced Memory and Neural Computing
Authors: Elisa Damiani | Margherita Marsili | Maria Clelia Righi
Source: SSRN Electronic Journal (preprint, 2024-01-01)
Field: Materials Science — Materials Chemistry

Tuning the Adhesion of Diamond/Copper Interfaces Through Surface Chemical Modifications and Reconstruction Diamond ; Copper ; Adhesion ; Materials science ; Surface (topology) ; Nanotechnology ; Metallurgy ; Composite material ; Geometry Diamond and Carbon-based Materials Research ; Metal and Thin Film Mechanics ; Advanced materials and composites
Authors: Ji‐Hee Kim | Joonsoo Kim | Hong-Guk Min | Sehwan Park | Jin Cheol Park | Junhyeok Bang | Youngkuk Kim
Source: Research Square (preprint, 2024-07-19)
Field: Materials Science — Materials Chemistry

Ideal carrier multiplication in monolayer MoSe2 Charge carrier ; Monolayer ; Optoelectronics ; Photon ; Materials science ; Multiple exciton generation ; Ultrashort pulse ; Semiconductor ; Quantum dot ; Solar cell ; Scattering ; Nanotechnology ; Physics ; Optics 2D Materials and Applications ; Semiconductor Quantum Structures and Devices ; Perovskite Materials and Applications
Authors: José C. J. M. D. S. Menezes | Vinícius R. Campos
Source: Preprints.org (preprint, 2024-08-26)
Field: Chemistry — Organic Chemistry

Exploring the Benefits of Natural Derived Bioconjugates from Hydroxy Cinnamates for Biomedical, Cosmetic, and Food Applications This mini-review discusses the development and applications of naturally derived bioconjugates from hydroxycinnamic acids, such as coumaric, sinapic, ferulic, and caffeic acids, combined with various biomaterials. These bioconjugates offer a range of benefits including antioxidant properties, UV protection, customized hydrophilic-lipophilic balance, improved safety, solubility, emolliency, biocompatibility, biodegradability, and targeted delivery for biomedical, cosmetic, and food applications. The increasing demand for sustainable and natural products in the biomedical, cosmetic, and food industries has led to the exploration of these hydroxy cinnamic acids and their derivatives. We discuss the synthesis and modification of hydroxy cinnamic acids with biomaterials such as ω-hydroxy fatty acids, castor and lesquerella oils, glycerol, isosorbides, and synthetic polyethylene glycol to form functional phenolipids for biomedical, sunscreen and skincare applications. Techniques such as encapsulation with β-cyclodextrins and modification of biopolymeric supports like polysaccharides and starch are discussed for enhancing bioavailability and solubility. The fine-tuned development of bioconjugates from hydroxycinnamic acids using glycerol to modify the hydrophilic-lipophilic balance, substitution by water-soluble carboxylic acid groups, vegetable oil-based phenolipids, polysaccharides, PEGylation provide enhanced functionalities and offers a promising avenue for creating sustainable and effective products across various applications. Cinnamates ; Natural food ; Chemistry ; Natural (archaeology) ; Biotechnology ; Nanotechnology ; Food science ; Organic chemistry ; Biology ; Materials science Plant-Derived Bioactive Compounds ; biodegradable polymer synthesis and properties
Authors: Prabhu Ganesan | Revathi Ranganathan | Rajadurai Vijay Solomon | Peer Muhamed Noorani | Paramaguru Ganesan | Nooruddin Thajuddin | V. Anbazhagan | R. Renganathan | Peng Gao
Source: Asian Journal of Organic Chemistry (article, 2024-07-15)
Field: Materials Science — Materials Chemistry

Unravelling the Optoelectronic and Biological Properties of Phenanthroimidazo [1,2‐c] Quinazoline‐Based Donor‐Acceptor Materials Abstract Imidazo[1,2‐c]quinazoline, a class of fused imidazole and quinazoline acceptor units, is widely established as biologically and broadly spectral active materials, while their optoelectronic properties were seldom investigated in the literature. In this context, this research work introduced two donors of varying strength, such as triphenylamine (TP) and phenothiazine (PZ) units, into the phenanthroimidazo [1,2‐c] quinazoline acceptor unit to form donor‐acceptor type luminescence materials such as TPQZ and PZQZ, respectively and were characterized by NMR and mass spectroscopy. Both these materials exhibited intramolecular charge transfer (ICT) type absorption (∼380–450 nm) and emission (∼540–600 nm) characteristics, which attributed to the electronic transition occurring from the HOMO of the TP/PZ donor to the LUMO+1 and LUMO+2 of the imidazo [1,2‐c] quinazoline acceptor unit, as predicted using DFT calculations. Increasing the electron donor strength was not only limited to fine‐tuning the π→π* based localized (∼400–450 nm) to ICT (∼450–650 nm) emission characteristics in both the solution and solid‐state conditions but also found to improve the zone of inhibition to 16 mm against Staphylococcus aureus / Bacillus subtilis bacterial species. The scope of realizing the luminescence nature of this acceptor unit is further expanded towards tagging biological samples such as E. coli. Overall, this work opens up a new paradigm in developing luminescent materials utilizing imidazo[1,2‐c]quinazoline acceptor unit for optoelectronic and biological applications. Chemistry ; Acceptor ; HOMO/LUMO ; Intramolecular force ; Luminescence ; Context (archaeology) ; Photochemistry ; Electron donor ; Quinazoline ; Electron acceptor ; Combinatorial chemistry ; Stereochemistry ; Optoelectronics ; Materials science ; Molecule ; Organic chemistry ; Physics Luminescence and Fluorescent Materials ; Organic Light-Emitting Diodes Research ; Conducting polymers and applications
Authors: Ignas Bitinaitis | Alexandr Belosludtsev | G. Suchaneck | Sitao Wang | Gerald Gerlach | Н. А. Соболев
Source:  (article, 2024-04-05)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Reactive multitarget magnetron sputtering of Sr2FeMoO6 films Strontium ferromolybdate Sr<sub>2</sub>FeMoO<sub>6</sub> (SFMO) is a promising material for spintronic, photonic and plasmonic devices operating at room temperatures due to its high spin polarisation and high Curie temperature. Variations in SFMO lattice and material composition greatly impact magnetic properties and application range of spintronic devices. A high-quality SFMO film is difficult to obtain due to unavoidable defects and nonstoichiometry. Using multitarget reactive magnetron sputtering technology it is possible to achieve high density and precise composition of deposited films. The aim of this work is to reach an optimum SFMO film composition for the further development of multilayered magnetic film structures for spintronic devices. Films were deposited using an industrial sputtering system on 150 mm diameter platinized silicon wafers using high-purity Sr, Fe and Mo targets. For precise control of partial oxygen pressure, a plasma emission monitor (PEM) was used. Deposition parameters were adjusted and fine-tuned according to the evaluation of deposited SFMO films. The latter ones were investigated using Scanning Electron Microscope (SEM), Energy Dispersive X-Ray Spectroscopy (EDX), X-ray Diffraction (XRD), Atomic Force Microscope (AFM) and optical reflectance in the UV-IR range. The achieved SFMO film composition was close to the optimal one and samples were provided for further multilayered structure deposition to prototype and develop a spintronic sensor. Materials science ; Sputter deposition ; Sputtering ; Cavity magnetron ; Optoelectronics ; Computer science ; Thin film ; Nanotechnology Magnetic and transport properties of perovskites and related materials ; Metal and Thin Film Mechanics ; Catalytic Processes in Materials Science