Bulletin of Materials Science最新文献_第10页

Fracture behaviour and failure mechanisms of LM25 alloy and LM25–10% SiC composite under impact loading 冲击载荷下LM25合金和LM25 - 10% SiC复合材料的断裂行为及破坏机制

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-25 DOI: 10.1007/s12034-026-03646-z

Jayashree Baral

{"title":"Fracture behaviour and failure mechanisms of LM25 alloy and LM25–10% SiC composite under impact loading","authors":"Jayashree Baral","doi":"10.1007/s12034-026-03646-z","DOIUrl":"10.1007/s12034-026-03646-z","url":null,"abstract":"<div><p>This study investigates the microstructural evolution, mechanical properties, and fracture behaviour of LM25 aluminium alloy and LM25–10 wt% SiC composite in both as-cast and T6 heat-treated conditions. Optical microscopy revealed that T6 treatment significantly refined the eutectic Si morphology and improved matrix homogeneity. The Vickers hardness and tensile tests revealed significant improvements following heat treatment, with the LM25–SiC composite exhibiting the highest values 96 ± 6 HV for hardness, 229 MPa for yield strength, and 248 MPa for ultimate tensile strength. However, the ductility of the composite remained limited due to the presence of hard SiC particles. SEM fracture analysis indicated a transition from brittle to more ductile fracture modes after heat treatment, evidenced by microvoid coalescence and improved matrix–reinforcement bonding. Impact testing also supported these findings, showing that heat-treated samples absorbed more energy because of their improved microstructure and stress distribution. Although the composite had lower impact strength than the base alloy, heat treatment helped reduce its brittle behaviour. Fractography revealed features such as oxide bifilms, particle pull-out, and cleavage fractures in the as-cast state, which transformed into ductile dimples and shear lips post-treatment. These findings highlight the beneficial role of T6 treatment in enhancing the mechanical performance and fracture resistance of LM25-based composites.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical insights into the structural, electronic, optical and photovoltaic behavior of the novel halide Ba3BiI3 新型卤化物Ba3BiI3的结构、电子、光学和光电行为的理论见解

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-24 DOI: 10.1007/s12034-026-03657-w

Mohamed El Bouanounou, Nour El Haq El Macouti, Abdelmajid Assila, El-Kebir Hlil, Yahia Boughaleb, Abdelowahed Hajjaji, Said Laasri

{"title":"Theoretical insights into the structural, electronic, optical and photovoltaic behavior of the novel halide Ba3BiI3","authors":"Mohamed El Bouanounou, Nour El Haq El Macouti, Abdelmajid Assila, El-Kebir Hlil, Yahia Boughaleb, Abdelowahed Hajjaji, Said Laasri","doi":"10.1007/s12034-026-03657-w","DOIUrl":"10.1007/s12034-026-03657-w","url":null,"abstract":"<div><p>This study proposes a first-principles theoretical investigation of the structural, electronic, optical, and photovoltaic characteristics of the compound Ba<sub>3</sub>BiI<sub>3</sub>, a material not previously reported in the literature. Calculations were carried out within the framework of density functional theory (DFT) using three distinct exchange-correlation functionals: GGA-PBE, meta-GGA (RSCAN), and the hybrid HSE03, to ensure the reliability and consistency of the results. The electronic band structure reveals a direct band gap of 1.03 eV, which is well-suited for visible light absorption. The optical response—characterized through the dielectric function, absorption coefficient, reflectivity, optical conductivity, refractive index, and energy loss function—highlights efficient photon–electron interaction across the visible and ultraviolet range. Photovoltaic performance parameters were derived from the electronic and optical data. Notably, the external quantum efficiency (EQE), short-circuit current density (<i>J</i><sub>sc</sub>), open-circuit voltage (<i>V</i><sub>oc</sub>), maximum power (<i>P</i><sub>max</sub>), and current–voltage (<i>I</i>–<i>V</i>) characteristic were modeled. A significant <i>J</i><sub>sc</sub> value of 26.68 mA cm<sup>–2</sup> was estimated for a 600 nm active layer, with a progressive increase to 34.07 mA cm<sup>–2</sup> at 1000 nm. These findings position Ba<sub>3</sub>BiI<sub>3</sub> as a strong theoretical candidate for non-toxic, lead-free photovoltaic technologies and warrant further experimental validation.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DFT+U investigation of structural and functional properties of doped LaCrO3 chromite perovskites 掺杂LaCrO3铬铁矿钙钛矿结构和功能特性的DFT+U研究

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-24 DOI: 10.1007/s12034-026-03662-z

M Nasri, J Khelifi, Konstantin P Katin, Elyor Berdimurodov, Alisher Ishankulov

{"title":"DFT+U investigation of structural and functional properties of doped LaCrO3 chromite perovskites","authors":"M Nasri, J Khelifi, Konstantin P Katin, Elyor Berdimurodov, Alisher Ishankulov","doi":"10.1007/s12034-026-03662-z","DOIUrl":"10.1007/s12034-026-03662-z","url":null,"abstract":"<div><p>A comprehensive DFT+U investigation of half-doped chromite perovskites (La<sub>0.5</sub>X<sub>0.5</sub>CrO<sub>3</sub> (X = Ba, Sr, Ca)) was performed to correlate lattice distortion with magnetic, electronic and optical responses. After full √2 × √2 × 2 super-cell optimisation, the pseudo-cubic lattice constant <i>a</i><sub>pc</sub> expands by +1.8% for Ba<sup>2+</sup> and contracts by –0.9% for Ca<sup>2+</sup>, shifting the Goldschmidt tolerance factor from 0.957 (Ca) to 1.016 (Ba). The concomitant Cr–O–Cr bond angle widens from 158° (Ca) to 170° (Ba), suppressing octahedral tilts. Total-energy calculations show that C-type antiferromagnetism remains the universal ground state, with stabilisation energies Δ<i>E</i> = 0.246–0.271 Ry (3.3–3.7 eV fu<sup>−1</sup>) and Cr local moments of 2.60 ± 0.03 μ<sub>B</sub>. Band-structure analysis reveals indirect-to-direct gap narrowing from 1.8 eV (Ba) → 1.1 eV (Sr) → 0.6 eV (Ca), reflected by static dielectric constants <i>ε</i><sub>0</sub> = 11.2, 14.6, 17.0 and refractive indices <i>n</i><sub>0</sub> = 3.3, 3.8, 4.1, respectively. These trends confirm that chemical pressure mediated by A-site radius systematically tunes bandwidth, exchange strength and optical edge, positioning Ba-rich members for visible/UV photonics, Sr for telecom-band devices and Ca for mid-IR spin-optoelectronics.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploration of Ba–Ta-based double perovskite oxides for oxygen ion conduction guided by structural parameters 基于结构参数的ba - ta基双钙钛矿氧化物氧离子导电研究

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-23 DOI: 10.1007/s12034-026-03672-x

Devidas Gulwade, Shrikant Ghodke

{"title":"Exploration of Ba–Ta-based double perovskite oxides for oxygen ion conduction guided by structural parameters","authors":"Devidas Gulwade, Shrikant Ghodke","doi":"10.1007/s12034-026-03672-x","DOIUrl":"10.1007/s12034-026-03672-x","url":null,"abstract":"<div><p>Development of sustainable solutions is being carried out globally, and efforts are focused on efficient technology that will lead to better utilization of fuel and lower emissions of carbon dioxide. Solid oxide fuel cell (SOFC) is one of the viable and unscalable options that will avoid emissions of carbon dioxide by many folds in producing electricity. In the present work, we report a novel approach to the development of an electrolyte for SOFC applications. In literature, a number of compounds have been investigated based on doped CeO<sub>2</sub>, ZrO<sub>2</sub> and LaGaO<sub>3</sub>. Lanthanum gallate exhibits a perovskite structure and is referred to as ABO<sub>3</sub> in general. ABO<sub>3</sub> materials have been investigated for a wide range of applications in the literature. Furthermore, in the enhancement of oxygen ion conductivity, it has been established that appropriate doping of the A and B sites in the ABO<sub>3</sub> perovskite structure leads to the formation of oxygen ion vacancies and results in higher ionic conductivity. It has been found that a tolerance factor (TF) around 0.96 and a large specific free volume (SFV) are prerequisites for a higher ionic conductivity. In the present study, based on parameters, namely SFV and TF, a new family of compounds having a perovskite structure is proposed as a possible candidate for an oxygen ion conductor. Amongst these compounds, BaY<sub>0.5</sub>Ta<sub>0.5</sub>O<sub>3</sub>, having a favourable set of parameters, demanding thorough investigation, has been selected for the study. Aluminium-doped BaY<sub>0.5</sub>Ta<sub>0.5</sub>O<sub>3</sub> has been synthesized using a solid-state reaction. Synthesis of a single phase has been confirmed using X-ray diffraction. Synthesized powder is compacted and sintered pellets have been used for conductivity measurement. In the present work, we report the synthesis and characterization of doped BaY<sub>0.5</sub>Ta<sub>0.5</sub>O<sub>3</sub> compounds.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A theoretical investigation of the temperature-dependent elastic, mechanical, and thermodynamic behavior of Ta–10%W, Ta–30%W and Ta–50%W alloys Ta-10%W、Ta-30%W和Ta-50%W合金的弹性、力学和热力学行为的理论研究

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-23 DOI: 10.1007/s12034-026-03659-8

E GÜLER, Ş UĞUR, M GÜLER, G UĞUR

{"title":"A theoretical investigation of the temperature-dependent elastic, mechanical, and thermodynamic behavior of Ta–10%W, Ta–30%W and Ta–50%W alloys","authors":"E GÜLER, Ş UĞUR, M GÜLER, G UĞUR","doi":"10.1007/s12034-026-03659-8","DOIUrl":"10.1007/s12034-026-03659-8","url":null,"abstract":"<div><p>The temperature-dependent (0–300 K) elastic, mechanical, anisotropic, and thermodynamic properties of Ta–10%W, Ta–30%W and Ta–50%W (wt%) alloys were derived from 0 K density functional theory (DFT) calculations using the virtual crystal approximation (VCA). Subsequently, Varshni's well-known fit equation (<span>(C={C}_{0}-s/{[text{e}text{x}text{p}}^{left(frac{t}{T}right)}-1]))</span> was employed in this work to extrapolate the high-temperature elastic stiffness constants, and all results were compared with available experimental data. For the Ta–10%W and Ta–30%W alloys, the cubic elastic stiffness constants as well as the bulk, shear, and Young's moduli decrease together with the hardness values, while the Poisson's ratios increase with temperature. Conversely, for the Ta–50%W alloy, the cubic elastic stiffness constants, bulk modulus, and Poisson's ratio decrease, while the shear modulus, Young's modulus, and hardness increase significantly with increasing temperature. The hardness behavior of the investigated alloys illustrates a complex relationship, which is also discussed. The currently determined heat capacity curves (<span>(C_{V})</span>) of the alloys are in the range of Ta–10%W > Ta–30%W > Ta–50%W and are mainly related to the composition. In summary, the results of this study regarding the properties of Ta–10%W, Ta–30%W and Ta–50%W alloys are in good agreement with the available literature.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolution of physical field in Cu–Fe alloy melt under pulsed magnetic field 脉冲磁场作用下Cu-Fe合金熔体物理场演化

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-22 DOI: 10.1007/s12034-026-03641-4

Chongbo Li, Junting Zhang, Dongxia Kou, Zexiao Han, Jintao Liang

{"title":"Evolution of physical field in Cu–Fe alloy melt under pulsed magnetic field","authors":"Chongbo Li, Junting Zhang, Dongxia Kou, Zexiao Han, Jintao Liang","doi":"10.1007/s12034-026-03641-4","DOIUrl":"10.1007/s12034-026-03641-4","url":null,"abstract":"<div><p>In this study, the influence of a pulsed magnetic field (PMF) on the evolution of physical fields within a Cu–Fe alloy melt was systematically investigated using a two-dimensional transient multiphysics model developed in COMSOL Multiphysics. The magnetic flux density, induced current density, and Lorentz force were observed to be directly proportional to the applied current amplitude, while remaining largely insensitive to frequency variation. In contrast, increasing the pulse duration from 1.7 to 17 ms resulted in a reduction of the peak electromagnetic parameters. The PMF generated distinct vortex structures within the melt, characterized by a maximum radial Lorentz force located at the intermediate height of the molten alloy. These vortices, driven primarily by the rotational component of the Lorentz force, produced a symmetric toroidal flow pattern consisting of clockwise and counterclockwise circulations within the upper and lower regions of the melt, respectively. Such flow behavior promoted enhanced mixing and homogenization of both the temperature and solute concentration fields. Initially, the temperature distribution exhibited a ring-like profile because of electromagnetic induction heating. As solidification progressed, the temperature field gradually evolved toward a more uniform distribution, accompanied by a transition in the dominant heat-transfer mechanism from convection-controlled to conduction-dominated transport. The improved thermal and flow uniformity achieved under PMF conditions is expected to suppress macrosegregation and contribute to refinement of the solidified microstructure in the Cu–Fe alloy system.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiphysics-guided structural and compositional optimization of carbon–LiMnPO4 nanocomposite cathodes for high-performance lithium-ion batteries 高性能锂离子电池碳- limnpo4纳米复合阴极的多物理场引导结构和成分优化

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-22 DOI: 10.1007/s12034-026-03667-8

Rima Heider Al Omari, G Padma Priya, Shaker Al-Hasnaawei, Subhashree Ray, Amrita Pal, Renu Sharma, Ashish Singh Chauhan, Arsham Banimadadi

{"title":"Multiphysics-guided structural and compositional optimization of carbon–LiMnPO4 nanocomposite cathodes for high-performance lithium-ion batteries","authors":"Rima Heider Al Omari, G Padma Priya, Shaker Al-Hasnaawei, Subhashree Ray, Amrita Pal, Renu Sharma, Ashish Singh Chauhan, Arsham Banimadadi","doi":"10.1007/s12034-026-03667-8","DOIUrl":"10.1007/s12034-026-03667-8","url":null,"abstract":"<div><p>The electrochemical efficiency of lithium-ion batteries (LIBs) is largely governed by the structural and compositional design of their cathode materials. This study presents a comprehensive multiphysics simulation of carbon–LiMnPO<sub>4</sub> nanocomposite cathodes to optimize their high-rate electrochemical performance. By integrating Fick’s second law, Ohm’s law, and the Butler–Volmer equation within COMSOL Multiphysics, the coupled effects of particle size, carbon content, and carbon distribution were systematically investigated. The results reveal that reducing LiMnPO<sub>4</sub> particle size from 100 to 20 nm enhances lithium-ion diffusion by 30%, increasing discharge capacity from 108 to 125 mAh/g at 1C. An optimal carbon content of 30 wt% yields maximum conductivity (4.3 × 10<sup>−1</sup> S/cm), minimum charge-transfer resistance (23 Ω), and peak capacity (130 mAh/g). Furthermore, uniform carbon distribution minimizes current inhomogeneity (standard deviation 0.015 mA/cm<sup>2</sup>), resulting in 92% capacity retention after 100 cycles at 2C, compared with 76% for non-uniform configurations. These findings demonstrate the synergistic roles of nanoscale engineering, compositional tuning, and morphological control in enhancing both rate capability and cycling stability. The developed multiphysics framework provides predictive insights into the electrochemical behavior of composite cathodes, guiding the rational design of next-generation high-performance LIB materials.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of optical properties of nematic liquid crystals dispersed with CdSe quantum dots CdSe量子点分散向列液晶光学性质的研究

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-20 DOI: 10.1007/s12034-026-03655-y

Shital V Kahane, Ankita Sutar, Yogesh Jadhav, Swapnil Doke

{"title":"Investigation of optical properties of nematic liquid crystals dispersed with CdSe quantum dots","authors":"Shital V Kahane, Ankita Sutar, Yogesh Jadhav, Swapnil Doke","doi":"10.1007/s12034-026-03655-y","DOIUrl":"10.1007/s12034-026-03655-y","url":null,"abstract":"<div><p>This research investigates the impact of CdSe quantum dots (QDs) on the optical properties of 5CB nematic liquid crystals (NLCs). CdSe QDs of two sizes (3.2 and 5.3 nm) were synthesized using a wet chemical method and dispersed within the NLC matrix. Structural analysis of CdSe QDs was done by X-ray diffraction measurement, and confirmed the cubic zinc blend structure of CdSe QDs without any impurities. The optical properties were examined through absorption and emission spectroscopy, revealing distinct excitonic peaks at 614 nm (resulting in red emission at wavelength 618 nm) and 560 nm (resulting in yellow emission at wavelength 571 nm) for CdSe QDs of 5.3 and 3.2 nm sizes, respectively. The size-dependent blue shift in the excitonic peak, attributed to quantum confinement, was consistent with the XRD observations. Moreover, the study is directed towards enhancing the optical characteristics of pure NLC by exploiting the luminescent qualities of these CdSe QDs. Initially, polarizing optical microscopy (POM) was used to study the polarizing states of CdSe QDs-NLC composites. POM results indicated intensified bright states and deepened dark states with the dispersal of 3.2 nm CdSe QDs, accompanied by reduced defects and light leakage centers. Conversely, 5.3 nm CdSe QDs in NLC led to increased light leakage centers in the POM dark state and a subsequent reduction in photoluminescence (PL) intensity. Notably, a PL emission enhancement of nearly 80% was observed with 3.2 nm CdSe QDs, attributed to improved NLC molecule alignment and reduced defects. The strong interaction between NLC molecules and QDs facilitates efficient energy transfer from the QDs to the NLC molecules, resulting in enhanced PL emission. It is crucial to note that the comparable size of QDs significantly enhances the optical properties of NLCs, making them ideal materials for display applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148613720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Porous hybrid material: Fluorescence-electrochemical behaviors and regulating NLRP3 inflammasome for Mycoplasma pneumonia treatment 多孔杂化材料：荧光电化学行为及调节NLRP3炎性体治疗支原体肺炎

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-17 DOI: 10.1007/s12034-026-03679-4

Wenping Zhao, Wei Zhang, Jiping Li, Leilei Qu

{"title":"Porous hybrid material: Fluorescence-electrochemical behaviors and regulating NLRP3 inflammasome for Mycoplasma pneumonia treatment","authors":"Wenping Zhao, Wei Zhang, Jiping Li, Leilei Qu","doi":"10.1007/s12034-026-03679-4","DOIUrl":"10.1007/s12034-026-03679-4","url":null,"abstract":"<div><p><i>Mycoplasma pneumoniae</i> (MP) infection is known to trigger excessive activation of the NLRP3 inflammasome, contributing to inflammation-mediated cellular injury. To explore strategies for sensing and modulating such inflammatory responses, we developed a proof-of-concept dual-modal nanoplatform, 1-HA-APDEMS@2@Ceftriaxone, capable of simultaneous drug loading and real-time signal monitoring. The system exhibited distinct electrochemical and fluorescence responses, including an increase in charge-transfer resistance from 1.9 to 18.8 kΩ, the appearance of a redox peak at +0.60 V (sensitivity: 38.13 μA μM<sup>−1</sup>; limit of detection: 1.2 nM), and a threefold enhancement in fluorescence intensity through fluorescence resonance energy transfer (FRET), with a linear detection range of 5 nM–2 μM (<i>R</i><sup>2</sup> = 0.9969). In MP-infected A549 cells, the pH-responsive nanoplatform attenuated NLRP3 inflammasome activation and reduced IL-1β and IL-18 secretion, suggesting an immunomodulatory effect associated with nanoparticle-mediated drug delivery. Overall, this study provides preliminary evidence for a dual-functional nanosystem that integrates real-time monitoring of drug-carrier behavior with modulation of inflammation-related pathways. These findings establish a foundation for the future development of immunomodulatory nanomedicines for inflammatory diseases associated with MP infection.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>A dual-functional hydrogel nanoplatform (1-HA-APDEMS@2@Ceftriaxone) enables pH-responsive drug release and real-time monitoring, while effectively inhibiting NLRP3 inflammasome activation and pro-inflammatory cytokine (IL-1β/IL-18) secretion in MP-infected cells.</p></div></div></figure></div></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photoinduced halide exchange in MAPbBr3: Exploring the role of light in modifying reaction pathways 光诱导MAPbBr3中的卤化物交换：探索光在改变反应途径中的作用

IF 2.1 4区材料科学

Bulletin of Materials Science Pub Date : 2026-07-15 DOI: 10.1007/s12034-026-03658-9

Md. Jahidul Islam, Md. Hafizul Islam

{"title":"Photoinduced halide exchange in MAPbBr3: Exploring the role of light in modifying reaction pathways","authors":"Md. Jahidul Islam, Md. Hafizul Islam","doi":"10.1007/s12034-026-03658-9","DOIUrl":"10.1007/s12034-026-03658-9","url":null,"abstract":"<div><p>Hybrid perovskites have gained significant attention as a remarkable class of materials with outstanding optoelectronic properties, offering great promise for applications in solar cells, light-emitting diodes, and photodetectors. The distinctive integration of organic and inorganic components in hybrid perovskites enables tunable bandgaps, high absorption coefficients, and long carrier-diffusion lengths, driving extensive research aimed at improving their performance and understanding their fundamental properties. This work investigated the influence of light–matter interactions on the halide-exchange process in methylammonium lead halide (MAPbBr<sub>3</sub>) perovskite microcrystals. High-quality MAPbBr<sub>3</sub> crystals were synthesized through room-temperature solvent evaporation from a precursor solution containing MABr and PbBr<sub>2</sub> dissolved in DMF, resulting in a bandgap of 2.26 eV and a green emission peak at 550 nm. Upon exposure of these crystals to methyl iodide, a gradual red shift in emission was observed, indicating the successful incorporation of iodide ions. However, under 405 nm UV laser illumination, the halide-exchange process exhibited unexpected behavior. The emergence of a cyanine-like color and the appearance of an anti-Stokes emission band suggested a light-induced perturbation of the halide structure, potentially leading to phase segregation and the formation of novel photo-induced intermediate states. These findings highlight the crucial role of light-matter interactions in influencing the dynamics of halide-exchange reactions in hybrid perovskites and have significant implications for the development and optimization of perovskite-based optoelectronic devices.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"49 3","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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