jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Xinjian Lu | Ruige Su | Guiyong Chen | Wenxin Li | Misheng Liang | Rui You
Source: Nanomaterials (review, 2025-04-18)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Stealth Materials Based on Laser-Induced Graphene: Developments and Challenges Laser-induced graphene (LIG) has become a promising stealth material due to its excellent electromagnetic loss characteristics in the terahertz and microwave bands (2-18 Ghz) and the advantages of low-cost large-scale manufacturing. With the rapid advancement of electromagnetic detection technologies toward multispectral and high-dynamic-range capabilities, there is an increasing demand for LIG-based stealth materials with superior absorption performance. The synergistic design of functional material doping and structural configurations has been identified as a critical approach to achieve high electromagnetic shielding performance in LIG-based composites. This article briefly reviews the developmental progress of LIG-based electromagnetic stealth materials, with a particular emphasis on doping technologies and shielding mechanisms tailored for stealth applications. Furthermore, we propose potential future development pathways for LIG-based stealth materials to facilitate their transition toward broader practical applications. Graphene ; Electromagnetic shielding ; Terahertz radiation ; Materials science ; Nanotechnology ; Microwave ; Doping ; Metamaterial ; Absorption (acoustics) ; Laser ; Electromagnetic radiation ; Optoelectronics ; Computer science ; Optics ; Physics ; Telecommunications ; Composite material Electromagnetic wave absorption materials ; Advanced Antenna and Metasurface Technologies ; Graphene research and applications
Authors: Linda Poggiarelli | Caterina Bernetti | Luca Pugliese | Federico Greco | Bruno Beomonte Zobel | Carlo Augusto Mallio
Source: Clinics and Practice (review, 2025-07-25)
Field: Materials Science — Materials Chemistry

Manganese-Based Contrast Agents as Alternatives to Gadolinium: A Comprehensive Review Manganese-based contrast agents present a potential alternative to gadolinium-based MRI agents pending further validation. Despite promising imaging performance and biocompatibility, further investigation into stability and safety is essential. Additional research is needed to facilitate the clinical translation of these agents. Gadolinium ; Biodistribution ; Medicine ; MRI contrast agent ; Magnetic resonance imaging ; Contrast (vision) ; Manganese ; Biocompatibility ; In vivo ; Computer science ; Radiology ; Materials science ; Biotechnology ; Artificial intelligence Lanthanide and Transition Metal Complexes ; MRI in cancer diagnosis ; Advanced MRI Techniques and Applications
Authors: Fabian Esterl | Maria Nienaber | Jan Bohlen | Noomane Ben Khalifa
Source: Journal of Manufacturing Processes (article, 2025-01-01)
Field: Materials Science — Biomaterials

Connecting texture development to die design in extruded flat products This study investigates the local texture modification of two magnesium alloys (AZ31 and ZX10) and an aluminum alloy (AA6082) based on changes in the die design. For this purpose, a conventional flat die and a modified die, which has been additively manufactured to allow for a significant modification of the material flow, are investigated. Extrusion tests are carried out, followed by a comprehensive examination of the microstructure and local texture development. These experimental results are complemented by finite element analysis of the state variable distribution in the cross section of the extruded band. The results demonstrate that the texture change is connected to the strain path and can therefore be controlled based on the die design. This equally applies to all of the investigated alloys, despite their differences in crystallographic deformation and recrystallization behavior. Accordingly, a rotation of the dominant texture components about ND at the edge of the band of approximately 40°, 45°, and 20° is observed for AZ31, ZX10, and AA6082, respectively. These findings correlate well with the difference in rotation around ND between the dies of 39°, which is calculated numerically based on the deformation gradient tensor. Furthermore, AZ31 and ZX10 demonstrate a broadening of the basal planes in the TD when extruded with the modified die, which can be related to the increased shear strains in the ED/TD plane over the entire width of the band. For ZX10 specifically, a completely different texture is generated due to the combination of the broadened basal planes in TD, the rotation of the dominant texture component around ND, and its tilt in ED, characteristic of extruded Ca-containing Mg-alloys. The investigation on AA6082 further illustrates the importance of the effective temperature and strain rate in the forming zone for its texture development. While no significant change in the microstructure is evident, the increased heat dissipation and smoothed introduction of dislocations during extrusion with the modified die correlates with a transition from Cube to Goss as the dominant texture component. • Analysis of a conventional and an additively manufactured die. • Texture change is related to the strain path and is controllable by the die design. • The rotation of dominant texture components is connected to deformation. • Basal plane broadening in AZ31 and ZX10 is linked to increased shear strains. • AA6082 exhibits a shift in dominant texture component from Cube to Goss. Materials science ; Die (integrated circuit) ; Extrusion ; Texture (cosmology) ; Composite material ; Engineering drawing ; Metallurgy ; Mechanical engineering ; Nanotechnology ; Engineering ; Artificial intelligence ; Computer science Magnesium Alloys: Properties and Applications ; Metal Forming Simulation Techniques ; Aluminum Alloy Microstructure Properties
Authors: Xuanchi Zhou | Yongjie Jiao | Wentian Lu | Jinjian Guo | Xiaohui Yao | Jiahui Ji | Guowei Zhou | Huihui Ji | Zhe Yuan | Xiaohong Xu
Source: Advanced Science (article, 2025-02-14)
Field: Materials Science — Polymers and Plastics

Hydrogen‐Associated Filling‐Controlled Mottronics Within Thermodynamically Metastable Vanadium Dioxide The discovery of hydrogen-associated topotactic phase modulations in correlated oxide system has emerged as a promising paradigm to explore exotic electronic states and physical functionality. Here hydrogen-induced Mott phase transitions are demonstrated for metastable VO<sub>2</sub> (B) toward new electron-itinerant hydrogenated phases via introducing non-equilibrium condition, delicately delivering a rich spectrum of hydrogen-associated electronic states. Of particular interest, the highly robust but reversible hydrogenated phase achievable in metastable VO<sub>2</sub> (B) significantly benefits protonic device applications, which is in contrast with well-known VO<sub>2</sub> (M1), where the metallic hydrogenated phase readily turns into insulating state with extensive hydrogen doping. Establishing correlated VO<sub>2</sub> at metastable status fundamentally surpasses the thermodynamic restrictions to expand the adjustability in their electronic structure, giving rise to new electronic states and a superior resistive switching of 10<sup>2</sup>-10<sup>5</sup> to the counterparts in widely-reported VO<sub>2</sub> (M1). Utilizing the theoretical calculations and synchrotron radiation analysis, the hydrogen-associated phase modulation in metastable VO<sub>2</sub> (B) is dominantly driven by band-filling-controlled orbital reconfiguration, while the concurrent structural evolution unveils a strong ion-electron-lattice coupling. The present work provides fundamentally new tuning knob for adjusting the energy landscape of electron-correlated system, advancing the rational design of unachievable electronic states in hydrogen-related equilibrium phase diagram. Metastability ; Hydrogen ; Materials science ; Chemical physics ; Metallic hydrogen ; Electronic structure ; Phase diagram ; Oxide ; Phase (matter) ; Condensed matter physics ; Atomic physics ; Chemistry ; Physics Transition Metal Oxide Nanomaterials ; Gas Sensing Nanomaterials and Sensors ; Copper-based nanomaterials and applications
Authors: Pu Mao | Jie Sun | Huimin Feng | Zhiyong Liu | Kun Guo | Bing Xie | Ting Wang | Lin He | Jinghui Gao
Source: Rare Metals (article, 2025-04-03)
Field: Materials Science — Materials Chemistry

Colossal permittivity and relaxation behavior in LiCuNb <sub>3</sub> O <sub>9</sub> ‐doped CaCu <sub>3</sub> Ti <sub>4</sub> O <sub>12</sub> ceramics with larger electrical response inside grains Abstract Copper calcium titanate (CaCu 3 Ti 4 O 12 , CCTO) ceramics with colossal permittivity have gained widespread concern because of their potential application in modern electronic devices with miniaturization and integration. However, the extent of grain and grain boundary contribution to the colossal permittivity of CCTO‐based ceramics based on the internal barrier layer capacitor (IBLC) model is still in debate. This affects their electrical performance optimization and real‐world applications. In this study, a series of novel lead‐free colossal permittivity ceramics, x LiCuNb 3 O 9 –(1– x )CaCu 3 Ti 4 O 12 (LCNO‐CCTO), were designed and prepared using a solid‐phase reaction approach. The colossal permittivity response mechanism of LCNO‐CCTO ceramics was further explored by performing the complex impedance spectrum and analyzing the activation energy from the grain and grain boundary contribution viewpoint. As a result, the LCNO‐CCTO ceramics present the cubic perovskite structure with the space groups of . All the LCNO‐CCTO ceramics exhibit the significantly enhanced colossal permittivity (10 5 ) response, and the ceramic with x = 0.15 shows the highest permittivity of about 4.64 × 10 5 (20 Hz, room temperature) accompanied by a lower grain resistance of 9.61 Ω and larger grain activation energy of 0.21 eV. The enhanced colossal permittivity response is primarily attributed to the great electrical response inside grains of LCNO‐CCTO ceramics, resulting from a smaller grain resistance. Also importantly, the high‐frequency dielectric relaxation characteristics are improved by incorporating the LCNO into CCTO ceramics as an ion form. Accordingly, the LCNO‐CCTO ceramics show a suppressed high‐frequency dielectric loss. These results can provide a thorough knowledge and useful optimization strategy for developing high‐performance colossal permittivity materials. Materials science ; Ceramic ; Permittivity ; Doping ; Relaxation (psychology) ; Dielectric permittivity ; Composite material ; Condensed matter physics ; Dielectric ; Optoelectronics Dielectric properties of ceramics ; Ferroelectric and Piezoelectric Materials ; Multiferroics and related materials
Authors: Chun‐Ying Huang | Daniel G. Chica | Zhi‐Hao Cui | Taketo Handa | Morgan Thinel | Nicholas Olsen | Yufeng Liu | Michael E. Ziebel | Guiying He | Yinming Shao | Connor A. Occhialini | Jonathan Pelliciari | D. N. Basov | Matthew Y. Sfeir | Abhay N. Pasupathy | Valentina Bisogni | David R. Reichman | Xavier Roy | Xiaoyang Zhu
Source: Nature Communications (article, 2025-02-23)
Field: Materials Science — Materials Chemistry

Coupling of electronic transition to ferroelectric order in a 2D semiconductor A ferroelectric material often exhibits a soft transverse optical (TO) phonon mode which governs its phase transition. Charge coupling to this ferroelectric soft mode may further mediate emergent physical properties, including superconductivity and defect tolerance in semiconductors. However, direct experimental evidence for such coupling is scarce. Here we show that a photogenerated coherent phonon couples strongly to the electronic transition above the bandgap in the van der Waals (vdW) two-dimensional (2D) ferroelectric semiconductor NbOI<sub>2</sub>. Using terahertz time-domain spectroscopy and first-principles calculations, we identify this mode as the TO phonon responsible for ferroelectric order. This exclusive coupling occurs only with the above-gap electronic transition and is absent in the valence band as revealed by resonant inelastic X-ray scattering. Our findings suggest a new role of the soft TO phonon mode in electronic and optical properties of ferroelectric semiconductors. Ferroelectricity ; Condensed matter physics ; Semiconductor ; Soft modes ; Phonon ; Phase transition ; Materials science ; Band gap ; Coupling (piping) ; Physics ; Optoelectronics ; Dielectric 2D Materials and Applications ; Photorefractive and Nonlinear Optics ; Acoustic Wave Resonator Technologies
Authors: Jian Li | Zhihao Wang | Jialing Jian | Zhengjin Weng | Qianqian Wu | Xingyu Zhou | Liangliang Lin | Xiaofeng Gu | Peng Xiao | Haiyan Nan | Shaoqing Xiao
Source: Advanced Science (article, 2025-08-04)
Field: Materials Science — Materials Chemistry

Ultrafast Self‐Driven WSe <sub>2</sub> Photodetectors with Bottom Schottky Contacts Conventional top-contact two dimensional (2D) Schottky photodetectors suffer from light shadowing and contact damage, leading to Fermi-level pinning and performance degradation. This work overcomes these limitations by designing a bottom-electrode Schottky photodetector (BE-Schottky PD) based on a Cr/WSe<sub>2</sub>/Au heterostructure. The key innovation involves fabricating the bottom Schottky Cr electrode into pre-etched SiO<sub>2</sub> substrate trenches, making it flush with the surface. This unique geometry eliminates optical shadowing to maximize light absorption, and enables a high-quality van der Waals Cr/WSe<sub>2</sub> interface, mitigating Fermi-level pinning. Consequently, the device exhibits an outstanding rectification ratio of 1.07 × 10<sup>4</sup> and an ideality factor of 1.11 due to the strong built-in electric field. It demonstrates excellent self-powered operation within the visible spectrum. Under 532 nm laser illumination and zero bias, it achieves rapid photoresponse with a fall time of 3.8 µs. This work, utilizing industry-compatible metals and a simple process, realizes a high-performance photodetector, highlighting the significant potential of 2D materials for efficient, low-power, and ultrasensitive optoelectronics. Photodetector ; Materials science ; Schottky diode ; Schottky barrier ; Optoelectronics ; Heterojunction ; Electrical contacts ; Electrode ; Substrate (aquarium) ; Ultrashort pulse ; Laser ; Optics ; Diode ; Chemistry ; Physics 2D Materials and Applications ; Perovskite Materials and Applications ; MXene and MAX Phase Materials
Authors: Sheng Pan | Ping Zhao | Hui Guan | Dawa Nan | Zhaoying Yang | Xiaoming Liu | Shaopeng Gao | Yahui Yue
Source: Geothermal Energy (article, 2025-05-05)
Field: Chemistry — Inorganic Chemistry

Mechanisms of lithium and cesium enrichment in the Semi-Dazi geothermal field, Qinghai-Xizang Plateau: insights from H–O–Li–Sr isotopes Abstract Hot springs in the southern Qinghai-Xizang Plateau show anomalous lithium (Li) and cesium (Cs) enrichment, but the mechanisms driving this enrichment remain poorly constrained. Using multi-isotope tracers (H, O, Li, Sr), we investigate the Semi-Dazi geothermal field, which hosts the Plateau’s highest recorded geothermal Cs concentrations. The system comprises two geographically separated geothermal areas: Semi and Dazi, spaced ~ 15 km apart, displaying distinct hydrogeochemical signatures. Semi hot springs show significantly higher Li (34.2 to 35.6 mg/L) and Cs (49.8 to 52.7 mg/L) concentrations than Dazi (Li: 11.4 to 21.1 mg/L; Cs: 21.5 to 37.7 mg/L). Isotopic contrasts further differentiate the areas: Semi exhibits elevated δ 7 Li (1.53 to 1.91 ‰) and lower 87 Sr/ 86 Sr (0.739 to 0.741), whereas Dazi shows δ 7 Li values of − 0.25 to 1.24 ‰ and 87 Sr/ 86 Sr ratios of 0.742 to 0.759. Two key processes govern enrichment: (1) atmospheric recharge infiltrates Li–Cs-rich strata, where high-temperature water–rock interactions (217 °C at Semi and 197 °C at Dazi reservoirs) mobilize these elements into geothermal waters; (2) phase separation during ascent causes differential steam loss (Semi: 24%, concentration factor 1.32; Dazi: 8 to 21%, 1.08 to 1.26). Secondary processes (cold water mixing, conductive cooling, mineral adsorption) further modify surface hot springs geochemistry. Semi-Dazi geothermal field illustrates how a shared geothermal system can yield chemically distinct fluids from separate reservoirs characterized by differing hydraulic connectivity and circulation pathways. Geyserite deposits and high reservoir temperatures suggest that a crustal partial melt layer adds extra heat, intensifying water–rock reactions. The occurrence of Li–Cs-rich springs on the Plateau is intrinsically linked to elevated concentrations of these elements in underlying crustal source rocks and spatially associated with deep, extensive fault systems, particularly at fault convergences. These findings underscore the necessity of multi-isotope models for interpreting geothermal Li–Cs anomalies in continental collision zones, with implications for strategic mineral exploration. Geothermal gradient ; Isotope ; Lithium (medication) ; Caesium ; Geology ; Plateau (mathematics) ; Field (mathematics) ; Mineralogy ; Geochemistry ; Chemistry ; Environmental science ; Geophysics ; Biology ; Physics ; Nuclear physics ; Inorganic chemistry ; Mathematics Radioactive element chemistry and processing ; Geological and Geochemical Analysis ; Groundwater and Isotope Geochemistry
Authors: Xiaoyun Qi | Shicheng Zhou | Yan Ma | Tadatomo Suga | Chenxi Wang
Source: International Journal of Extreme Manufacturing (article, 2025-01-09)
Field: Materials Science — Polymers and Plastics

Boosting non-oxide interfacial Co/SiO<sub>2</sub> hybrid bonding by selective surface activation Abstract Due to its superior nanoscale properties, cobalt (Co) is highly desirable for ultrahigh-density 3D integration into materials through metal/dielectric hybrid bonding. However, this process is very challenging through Co/SiO 2 hybrid bonding, as very hydrophilic SiO 2 surfaces are needed for bonding during dehydration reactions and oxidation of the Co surfaces must be avoided. Additionally, the substantial coefficient of thermal expansion mismatch between the robust capping layers (Co and SiO 2 layers) necessitates hybrid bonding with minimal thermal input and compression. In this study, we introduce a ternary plasma activation strategy employing an Ar/NH 3 /H 2 O gas mixture to facilitate Co/SiO 2 hybrid bonding at temperatures as low as ∼200 °C, which is markedly lower than the melting point of Co (∼1500 °C). Intriguingly, non-oxide metallization at the Co–Co interface can be realized without the hindrance of a bonding barrier, thereby reducing the electrical resistance by over 40% and compression force requirements. Moreover, the enhancement in the SiO 2 surface energy through active group terminations fosters extensive interfacial hydration and strengthens the mechanical properties. This research paves the way for fine-tuning bonding surfaces using a material-selective strategy, which should advance metal/dielectric hybrid bonding for future integration applications. Materials science ; Thermal expansion ; Dielectric ; Oxide ; Ternary operation ; Cobalt oxide ; Metal ; Cobalt ; Composite material ; Chemical engineering ; Nanotechnology ; Optoelectronics ; Metallurgy Synthesis and properties of polymers ; 3D IC and TSV technologies ; Advanced ceramic materials synthesis
Authors: Kerstin Dörner | Michelle Gut | Daan Overwijn | Fan Cao | Matej Siketanc | Stephanie Heinrich | Nicole Beuret | Justin R. Meyer | Timothy Sharpe | Kresten Lindorff‐Larsen | Maria Hondele
Source: EMBO Reports (article, 2025-11-20)
Field: Chemistry — Organic Chemistry

Fluorescent protein and peptide tags alter condensate formation and dynamics in vivo and in vitro Fluorescent proteins and peptide tags are essential tools in cellular biology, but can alter the biochemical and physiological behavior of target proteins. Biomolecular condensates, which have emerged as key elements of cellular organization, are suggested to provide robustness to cells, yet they can also respond sensitively to small changes in environmental conditions including tags. Here, we investigate the effects of over twenty widely used tags on condensate formation in vitro, in cells, in various model organisms and by computational modelling. We find that tagging strongly influences condensation for some proteins, while others remain unaffected. Effects vary, with some tags enhancing and others decreasing condensation, with the outcome depending on the protein being tagged. Coarse-grained simulations suggest that the charge of the fluorescent protein tags is a critical factor modulating condensation behavior. Together, our results underscore the need to tag with caution and highlight the importance of careful experimental design and interpretation, especially in condensate studies, but also suggest that fluorescent protein tags could serve as a tool to modulate condensate properties. Fluorescence ; Robustness (evolution) ; Peptide ; Fluorescent protein ; Green fluorescent protein ; In vivo ; In vitro ; Protein aggregation ; Bimolecular fluorescence complementation Click Chemistry and Applications ; Advanced Fluorescence Microscopy Techniques ; Biotin and Related Studies
Authors: Bei Li | Xiaocheng Fan | Ziqian Ma | Yujin Chen
Source: Small (article, 2025-06-20)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Copper Single Atoms on N‐Doped Hollow Nanocubes for Efficient Electromagnetic Wave Attenuation Rational design of unique nanostructures and suitable compositions is essential for highly-efficient electromagnetic wave (EMW) absorbing materials. Metal single-atoms (M-SAs) anchored on hollow-structured carbon-based materials have emerged as promising absorbers owing to their unique nanostructures and tunable electronic configurations. However, the synergistic coupling mechanism between hollow structure and M-SAs still remains poorly understood. Herein, an in situ vapor evaporation strategy is developed to anchor copper single-atoms on N-doped hollow carbon nanocubes (Cu-SAs/NHCC) for enhanced EMW absorption. Theoretical calculations indicate that the incorporation of Cu-SAs induces the charge redistribution and higher electrical conductivity, leading to stronger dielectric loss. Simulation results reveal that the hollow structure is beneficial for optimizing inadequately matched impedance. Consequently, the synergistic interaction between M-SAs and hollow nanostructure significantly improves EMW absorbing capability, which can be verified by the experimental results. The Cu-SAs/NHCC exhibits a minimum reflection loss (RL<sub>min</sub>) of -51.54 dB and an effective absorption bandwidth (EAB) of 4.34 GHz at a filler loading of 11 wt.%. Furthermore, the film consists of Cu-SAs/NHCC and aramid nanofibers, displays exceptional flexibility, stability, mechanical, and thermal insulating performance, highlighting potential multifunctional applications of Cu-SAs/NHCC. This work provides a viable strategy for designing high-performance EMW absorbers based on M-SAs with tailored nanostructures. Materials science ; Reflection loss ; Nanostructure ; Absorption (acoustics) ; Optoelectronics ; Copper ; Nanotechnology ; Thermal stability ; Electrical conductor ; Dielectric ; Attenuation ; Doping ; Composite material ; Chemical engineering ; Optics ; Composite number Electromagnetic wave absorption materials ; Advanced Antenna and Metasurface Technologies ; Metamaterials and Metasurfaces Applications