jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Maxim Fatkullin | Raúl D. Rodriguez | Ilia Petrov | Nelson Villa | Anna Lipovka | Maria Gridina | Gennadiy Murastov | Anna Chernova | Evgenii Plotnikov | Andrey Averkiev | Dmitry Cheshev | Oleg Semyonov | Fedor A. Gubarev | Konstantin Brazovskiy | Wenbo Sheng | Ihsan Amin | Jianxi Liu | Xin Jia | Evgeniya Sheremet
Source: Nanomaterials (article, 2023-03-02)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Molecular Plasmonic Silver Forests for the Photocatalytic-Driven Sensing Platforms Structural electronics, as well as flexible and wearable devices are applications that are possible by merging polymers with metal nanoparticles. However, using conventional technologies, it is challenging to fabricate plasmonic structures that remain flexible. We developed three-dimensional (3D) plasmonic nanostructures/polymer sensors via single-step laser processing and further functionalization with 4-nitrobenzenethiol (4-NBT) as a molecular probe. These sensors allow ultrasensitive detection with surface-enhanced Raman spectroscopy (SERS). We tracked the 4-NBT plasmonic enhancement and changes in its vibrational spectrum under the chemical environment perturbations. As a model system, we investigated the sensor's performance when exposed to prostate cancer cells' media over 7 days showing the possibility of identifying the cell death reflected in the environment through the effects on the 4-NBT probe. Thus, the fabricated sensor could have an impact on the monitoring of the cancer treatment process. Moreover, the laser-driven nanoparticles/polymer intermixing resulted in a free-form electrically conductive composite that withstands over 1000 bending cycles without losing electrical properties. Our results bridge the gap between plasmonic sensing with SERS and flexible electronics in a scalable, energy-efficient, inexpensive, and environmentally friendly way. Photocatalysis ; Plasmon ; Nanotechnology ; Materials science ; Environmental science ; Optoelectronics ; Chemistry ; Catalysis ; Organic chemistry Gold and Silver Nanoparticles Synthesis and Applications ; Advanced Nanomaterials in Catalysis ; Nanocluster Synthesis and Applications
Authors: Kazunori Matsuura | Hiroshi Inaba
Source: Biophysics Reviews (article, 2023-12-01)
Field: Materials Science — Materials Chemistry

Photoresponsive peptide materials: Spatiotemporal control of self-assembly and biological functions Peptides work as both functional molecules to modulate various biological phenomena and self-assembling artificial materials. The introduction of photoresponsive units to peptides allows the spatiotemporal remote control of their structure and function upon light irradiation. This article overviews the photoresponsive peptide design, interaction with biomolecules, and applications in self-assembling materials over the last 30 years. Peptides modified with photochromic (photoisomerizable) molecules, such as azobenzene and spiropyran, reversibly photo-controlled the binding to biomolecules and nanostructure formation through self-assembly. Photocleavable molecular units irreversibly control the functions of peptides through cleavage of the main chain and deprotection by light. Photocrosslinking between peptides or between peptides and other biomolecules enhances the structural stability of peptide assemblies and complexes. These photoresponsive peptides spatiotemporally controlled the formation and dissociation of peptide assemblies, gene expressions, protein-drug interactions, protein-protein interactions, liposome deformation and motility, cytoskeleton structure and stability, and cell functions by appropriate light irradiation. These molecular systems can be applied to photo-control biological functions, molecular robots, artificial cells, and next-generation smart drug delivery materials. Biomolecule ; Azobenzene ; Spiropyran ; Peptide ; Chemistry ; Biophysics ; Photochromism ; Drug delivery ; Molecule ; Nanotechnology ; Materials science ; Biochemistry ; Biology Photochromic and Fluorescence Chemistry ; Supramolecular Self-Assembly in Materials ; Polydiacetylene-based materials and applications
Authors: Hyunjo Yoo | Juyoung Kim | Hwanseok Lee | Ilguk Jo | Hee Soo Lee
Source: Metals (article, 2023-09-27)
Field: Materials Science — Ceramics and Composites

Phase Formation and Stabilization Behavior of Ca-PSZ by Post-Heat Treatment II: CaOx-ZrO2(1 − x) (x = 5–10 mol%) The effects of CaO content and post-heat treatment were investigated on the phase stability and mechanical and thermal properties of Ca-PSZ. ZrO2 specimens with 5–10 mol% CaO were sintered, and post-heat treatment was performed at 1200 °C for 100 h. Subsequently, to test and analyze the crystal structure and the microstructure, the mechanical and thermal properties of the specimens were evaluated. All specimens were partially stabilized by 5–10 mol% CaO (5CSZ–10CSZ) in a mixed monoclinic and tetragonal phase; however, peaks of the secondary phase of CaZrO3 were observed in 10CSZ. The ratio of the monoclinic phase decreased from 62.50% (5CSZ) to 21.02% (10CSZ) as the CaO content increased. Additionally, the monoclinic phase ratio decreased from 59.38% (5CSZ) to 19.57% (9CSZ) after the post-heat treatment; an increase to 24.84% was observed for 10CSZ. An increase in Vickers hardness from 676.02 to 1256.25 HV and flexural strength from 437.7 to 842.7 MPa was observed with increasing CaO content. The post-heat treatment resulted in further increases in these values as the CaO content increased from 5CSZ to 9CSZ; however, the Vickers hardness and flexural strength of 10CSZ decreased by approximately 8% and 9%, respectively. The thermal expansion coefficient exhibited the same tendency as the mechanical properties. This coefficient increased from 8.229 × 10−6 to 9.448 × 10−6 K−1 with increasing CaO content and was enhanced after the post-heat treatment in 5CSZ to 9CSZ; however, the thermal expansion coefficient of 10CSZ decreased by approximately 4% after the post-heat treatment. The mechanically and thermally stable tetragonal phase increased, and the monoclinic phase decreased as the doped Ca replaced the Zr sites, as was confirmed by the X-ray diffraction (XRD) analysis. The post-heat treatment and the increased Ca addition further facilitated the replacement of Zr sites by Ca. However, at high Ca concentrations of 10CSZ, an equilibrium phase of CaZrO3 was formed as a secondary phase at the post-heat treatment temperature, resulting in low performance. Monoclinic crystal system ; Materials science ; Thermal expansion ; Flexural strength ; Tetragonal crystal system ; Vickers hardness test ; Phase (matter) ; Microstructure ; Analytical Chemistry (journal) ; Composite material ; Mineralogy ; Crystal structure ; Chemistry ; Crystallography ; Chromatography ; Organic chemistry Advanced ceramic materials synthesis ; Advanced materials and composites ; Metal and Thin Film Mechanics
Authors: Reza Hosseinabadi | Andrea Brognara | Christoph Kirchlechner | James P. Best | Gerhard Dehm
Source: Materials & Design (article, 2023-07-14)
Field: Materials Science — Materials Chemistry

The role of incoherent twin boundaries on the plasticity of Cu micropillars The role of ∑3{112} incoherent twin boundary (ITB) on the shear stress of Cu at the micron scale has been investigated through microcompression of bi-crystalline pillars containing ITB, as well as single-crystalline pillars in two different compression directions. The Cu sample containing ITBs was synthesized using magnetron sputtering on a sapphire substrate. Firstly, pillars along [111] compression direction were milled on the film’s surface. As multiple slip systems were activated upon loading, the dislocation-ITB interaction in this direction was dominated by the dislocation-dislocation interactions. Another set of pillars was milled from the side of the film (in the thickness of the film) in a nominally [13 4¯] compression direction. Compression in this direction activated a single slip in each grain, which facilitated the investigation of the interaction between dislocations and ITBs. Post mortem images showed that slip traces were not distinctly connected at the boundary unlike ideal slip transmission in pillars containing a coherent twin boundary. Moreover, bi-crystalline pillars in the single slip direction are stronger than single-crystalline pillars. The observations indicate that ITBs are not impenetrable for dislocations, but the boundary demonstrates some resistance to transmission. Materials science ; Plasticity ; Nanotechnology ; Engineering physics ; Metallurgy ; Composite material ; Engineering Microstructure and mechanical properties ; Metal and Thin Film Mechanics ; Aluminum Alloys Composites Properties
Authors: Maximilian Franta | Johannes Gramüller | Philipp Dullinger | Simon Kaltenberger | Dominik Horinek | Ruth M. Gschwind
Source: Angewandte Chemie International Edition (article, 2023-03-30)
Field: Chemistry — Inorganic Chemistry

RETRACTED: Brønsted Acid Catalysis—Controlling the Competition between Monomeric versus Dimeric Reaction Pathways Enhances Stereoselectivities Chiral phosphoric acids (CPA) have become a privileged catalyst type in organocatalysis, but the selection of the optimum catalyst is still challenging. So far hidden competing reaction pathways may limit the maximum stereoselectivities and the potential of prediction models. In CPA-catalyzed transfer hydrogenation of imines, we identified for many systems two reaction pathways with inverse stereoselectivity, featuring as active catalyst either one CPA or a hydrogen bond bridged dimer. NMR measurements and DFT calculations revealed the dimeric intermediate and a stronger substrate activation via cooperativity. Both pathways are separable: Low temperatures and high catalysts loadings favor the dimeric pathway (ee up to -98 %), while low temperatures with reduced catalyst loading favor the monomeric pathway and give significantly enhanced ee (92-99 % ee; prior 68-86 % at higher temperatures). Thus, a broad impact is expected on CPA catalysis regarding reaction optimization and prediction. Chemistry ; Catalysis ; Organocatalysis ; Dimer ; Transition state ; Stereoselectivity ; Monomer ; Substrate (aquarium) ; Cooperativity ; Phosphoric acid ; Combinatorial chemistry ; Enantioselective synthesis ; Stereochemistry ; Organic chemistry ; Polymer Asymmetric Hydrogenation and Catalysis ; Asymmetric Synthesis and Catalysis ; Surface Chemistry and Catalysis
Authors: Timothy L. Burnett | Ryan Euesden | Yasser Aboura | Yichao Yao | Matthew E. Curd | C. Grant | Al Garner | N.J.H. Holroyd | Zak Barrett | C. ENGEL | P.B. Prangnell
Source: CORROSION (article, 2023-07-10)
Field: Materials Science — Materials Chemistry

Mechanisms of Environmentally Induced Crack Initiation in Humid Air for New-Generation Al-Zn-Mg-Cu Alloys Recent experience has shown that new-generation 7xxx-series alloys, that have a high Zn content and Zn/Mg ratios, have a greater susceptibility to hydrogen-environmental induced cracking (H-EIC) on exposure to humid air than more established materials, like AA7050. In this study, we report new evidence of the EIC initiation and crack growth behavior of two new-generation alloys, AA7085 and AA7449, when exposed to 50% humidity. In situ, time-lapse, optical imaging over large areas has enabled the exact initiation sites to be identified and investigated with high-resolution fractographic studies, providing evidence for the sequence and mechanisms of initiation and transition to sustained cracking. A consistent behavior was observed for both alloys. This has revealed that minute-scale corrosion reactions, involving highly localized condensed water, are necessary for initiation. The preferred initiation sites are metal ligaments between surface-connected pore clusters and/or intermetallic particles that are subjected to high-stress concentration and undergo mechanical damage with associated higher levels of local oxidation. The growth of short protocracks from these sites is a distinct stage and displays intermittent arrest markings evidenced by localized corrosion. In contrast, in humid air environments, long cracks in these alloys exhibited relatively constant, higher velocity, with extremely limited corrosion commensurate with oxidation of a free surface in this environment resulting in approximately 5 nm oxide layer. Materials science ; Corrosion ; Oxide ; Intermetallic ; Stress corrosion cracking ; Metallurgy ; Cracking ; Metal ; Composite material Corrosion Behavior and Inhibition ; Hydrogen embrittlement and corrosion behaviors in metals ; Aluminum Alloy Microstructure Properties
Authors: Lu Liu | Xiaogang Yang | Yanqing Guo | Bin Li | Lian‐Ping Wang
Source: Ultrasonics Sonochemistry (article, 2023-02-15)
Field: Materials Science — Materials Chemistry

Reactive mixing performance for a nanoparticle precipitation in a swirling vortex flow reactor Mixing performance for a consecutive competing reaction system has been investigated in a swirling vortex flow reactor (SVFR). The direct quadrature method of moments combined with the interaction by exchange with the mean (DQMOM-IEM) method was employed to model such reacting flows. This type of reactors is able to generate a strong swirling flow with a great shear gradient in the radial direction. Firstly, mixing at both macroscale and microscale was assessed by mean mixture fraction and its variance, respectively. It is found that macromixing can be rapidly achieved throughout the whole reactor chamber due to its swirling feature. However, micromixing estimated by Bachelor length scale is sensitive to turbulence. Moreover, the additional introduction of ultrasound irradiation can significantly improve the mixing uniformity, namely, free of any stagnant zone presented in the reactor chamber on a macroscale, and little variance deviating from the mean environment value can be observed on a microscale. Secondly, reaction progress variable and the reactant conversion serve as indicators for the occurrence of side reaction. It is found that strong turbulence and a relatively fast micromixing process compared to chemical reaction can greatly reduce the presence of by-product, which will then provide homogenous environment for particle precipitation. Moreover, due to the generation of cavitation bubbles and their subsequent collapse, ultrasound irradiation can further intensify turbulence, creating rather even environment for chemical reactions. Low conversion rate was observed and little by-products were generated consequently. Therefore, it is suggested that the SVFR especially intensified by ultrasound irradiation has the ability to provide efficient mixing performance for the fine-particle synthesis process. Micromixing ; Microscale chemistry ; Turbulence ; Mechanics ; Mixing (physics) ; Vortex ; Chemistry ; Materials science ; Reaction rate ; Rushton turbine ; Thermodynamics ; Physics ; Analytical Chemistry (journal) ; Chromatography ; Organic chemistry ; Mathematics Ultrasound and Cavitation Phenomena ; Fluid Dynamics and Mixing ; Coagulation and Flocculation Studies
Authors: Ke Zhang | Jingfei Chen | Quan Dong | Tianxia Wei | Dazhao Wang | Xueliang Li | Xu Feng | Zhixue He | Jianrong Qiu | Shifeng Zhou
Source: Advanced Materials Technologies (article, 2023-04-12)
Field: Materials Science — Ceramics and Composites

Broadband Optical Amplification in Bi‐Doped Multicomponent Glass Fiber Abstract Bismuth(Bi)‐doped photonic materials with broadband near‐infrared luminescence can be used in applications such as high‐capacity fiber communication, fiber laser, and biological imaging. The scalable fabrication of Bi‐doped fibers with high dopant solubility, high optical activity, and broadband optical response still remains a significant challenge. In this study, the comprehensive studies on the physical, chemical, mechanical, and optical responses of a Bi‐doped glass system are performed and a Bi‐doped germanate multicomponent glass system is proposed to be the promising candidate. The deactivation mechanism of Bi in a glass matrix is investigated and prevented by controlling the fiber drawing. In addition, a Bi‐doped multicomponent germanate glass fiber with a high level of Bi doping is successfully constructed. Finally, a principle compact fiber amplifier device is fabricated for broadband optical amplification. This device can be potentially used for increasing the capacity of telecommunication systems. Materials science ; Doping ; Optical fiber ; Optoelectronics ; Photonic-crystal fiber ; Broadband ; Dopant ; Photonics ; Multi-mode optical fiber ; Fiber laser ; Hard-clad silica optical fiber ; Fiber ; Optics ; Plastic optical fiber ; Fiber optic sensor ; Composite material ; Wavelength Glass properties and applications ; Photonic Crystal and Fiber Optics ; Optical Coherence Tomography Applications
Authors: Xu Zhang | Haogang Cai | Soroosh Daqiqeh Rezaei | Daniel Rosenmann | Daniel López
Source: Nanophotonics (article, 2023-01-11)
Field: Materials Science — Electronic, Optical and Magnetic Materials

A universal metasurface transfer technique for heterogeneous integration Metasurfaces offer a versatile platform for engineering the wavefront of light using nanostructures with subwavelength dimensions and hold great promise for dramatically miniaturizing conventional optical elements due to their small footprint and broad functionality. However, metasurfaces so far have been mainly demonstrated on bulky and planar substrates that are often orders of magnitude thicker than the metasurface itself. Conventional substrates not only nullify the reduced footprint advantage of metasurfaces, but also limit their application scenarios. The bulk substrate also determines the metasurface dielectric environment, with potentially undesired optical effects that undermine the optical performance. Here we develop a universal polymer-assisted transfer technique to tackle this challenge by decoupling the substrate employed on the fabrication of metasurfaces from that used for the target application. As an example, Huygens' metasurfaces with 120 nm thickness in the visible range (532 nm) are demonstrated to be transferred onto a 100 nm thick freestanding SiNx membrane while maintaining excellent structural integrity and optical performance of diffraction-limited focusing. This transfer method not only enables the thinnest dielectric metalens to the best of our knowledge, but also opens up new opportunities in integrating cascaded and multilayer metasurfaces, as well as the heterogeneous integration with nonconventional substrates and various electronic/photonic devices. Materials science ; Wavefront ; Footprint ; Lithography ; Decoupling (probability) ; Nanotechnology ; Optoelectronics ; Photonics ; Dielectric ; Planar ; Fabrication ; Transfer printing ; Plasmon ; Metamaterial ; Substrate (aquarium) ; Optics ; Computer science ; Physics Metamaterials and Metasurfaces Applications ; Plasmonic and Surface Plasmon Research ; Photonic Crystals and Applications
Authors: Hector del Pozo Gonzalez | Marc Torrell | Lucile Bernadet | Fernando D. Bianchi | Lluís Trilla | Albert Tarancón | José Luís Domínguez‐García
Source: Mathematics (article, 2023-01-10)
Field: Materials Science — Materials Chemistry

Mathematical Modeling and Thermal Control of a 1.5 kW Reversible Solid Oxide Stack for 24/7 Hydrogen Plants Solid oxide technology has gained importance due to its higher efficiencies compared to other current hydrogen technologies. The reversible mode allows working with both technologies (SOEC-SOFC), which makes it very attractive for mixed operations, both storage and generation, increasing its usage and therefore the viability of the technology implementation. To improve the performance of reversible stacks, developing adequate control strategies is of great importance. In order to design these strategies, suitable models are needed. These control-oriented models should be simple for an efficient controller design, but also they should include all phenomena that can be affected by the control law. This article introduces a control-oriented modeling of a reversible solid oxide stack (rSOS) for the implementation of control strategies considering thermal and degradation effects. The model is validated with experimental data of a 1.5 kW laboratory prototype, analyzing both polarization curves and dynamic responses to different current profiles and compositions. An error of less than 3% between the model and experimental responses has been obtained, demonstrating the validity of the proposed control-oriented model. The proposed model allows performing new and deeper analysis of the role of reversible solid oxide cells in 24/7 generation plants with renewable energy sources. Stack (abstract data type) ; Oxide ; Computer science ; Renewable energy ; Solid oxide fuel cell ; Thermal ; Controller (irrigation) ; Process engineering ; Materials science ; Engineering ; Electrical engineering ; Chemistry ; Anode Advancements in Solid Oxide Fuel Cells ; Magnetic and transport properties of perovskites and related materials ; Chemical Looping and Thermochemical Processes
Authors: Keerthivasan Rajamani | Muhammet S. Toprak | Fengqi Zhang | A. Iulian Dugulan | E. Brück | Theo van der Meer | Mina Shahi
Source: ACS Omega (article, 2023-12-12)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Unlocking the Potential of Magnetic Refrigeration: Investigating the Compatibility of the Ga-Based Liquid Metal with a La(Fe,Mn,Si)<sub>13</sub>H<sub><i>z</i></sub> Magnetocaloric Material for Enhanced Long-Term Stability Magnetic refrigeration (MR) is a cutting-edge technology that promises high energy efficiency and eco-friendliness, making it an exciting alternative to traditional refrigeration systems. However, the main challenge to its widespread adoption is cost competitiveness. In this context, the use of liquid metals as heat transfer liquids in the MR has been proposed as a game-changing solution. Unfortunately, the toxicity and flammability of these liquid metals have raised serious concerns, limiting their practical use. In this study, we investigate the compatibility of a nontoxic and nonflammable GaInSn-based liquid metal with a magnetocaloric material, La(Fe,Mn,Si)<sub>13</sub>H<sub><i>z</i></sub>, over a 1.5 year period. Our findings reveal nearly a 14% reduction in specific cooling energy and peak-specific isothermal magnetic entropy change for the considered magnetocaloric material. Our study provides valuable insights into the long-term stability of magnetocaloric materials and their compatibility with liquid metals, facilitating the development of more cost-effective and sustainable MR systems. Magnetic refrigeration ; Compatibility (geochemistry) ; Refrigeration ; Materials science ; Limiting ; Liquid metal ; Isothermal process ; Process engineering ; Mechanical engineering ; Thermodynamics ; Metallurgy ; Magnetic field ; Magnetization ; Composite material ; Engineering ; Physics Magnetic and transport properties of perovskites and related materials ; Thermal Expansion and Ionic Conductivity