材料科学最新文献

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Enhanced mechanical properties and thermal stability of boron doped molybdenum alloy 硼掺杂钼合金的力学性能和热稳定性增强
IF 4.6 2区 材料科学
International Journal of Refractory Metals & Hard Materials Pub Date : 2025-08-04 DOI: 10.1016/j.ijrmhm.2025.107354
Qinghao Yang , Xingjiang Hua , Chaofan Quan , Hua Wang , Li Wang , Hairui Xing , Junzhou Yang , Qiang Wang , Ping Hu , Kuaishe Wang
{"title":"Enhanced mechanical properties and thermal stability of boron doped molybdenum alloy","authors":"Qinghao Yang ,&nbsp;Xingjiang Hua ,&nbsp;Chaofan Quan ,&nbsp;Hua Wang ,&nbsp;Li Wang ,&nbsp;Hairui Xing ,&nbsp;Junzhou Yang ,&nbsp;Qiang Wang ,&nbsp;Ping Hu ,&nbsp;Kuaishe Wang","doi":"10.1016/j.ijrmhm.2025.107354","DOIUrl":"10.1016/j.ijrmhm.2025.107354","url":null,"abstract":"<div><div>Molybdenum alloys with different boron-doping contents (0.0 %, 0.5 %, 1.0 %, and 10.0 %) were fabricated using powder metallurgy. The thermal stability and mechanical properties of molybdenum alloys doped with 1.0 % boron (Mo-1.0B) were studied at various annealing temperatures at 900 °C, 1000 °C, 1100 °C, and 1200 °C. The results show that trace boron doping enhances the densification of the structure. The porosities of sintered Mo-0.5B and Mo-1.0B specimens are 2.46 % and 1.75 %, respectively. The sintered fractures of Mo-0.5B and Mo-1.0B exhibit a mixture of intergranular and transgranular characteristics, whereas the porosity of sintered Mo-10.0B specimens reaches 27.58 %. The sintered fracture morphology of Mo-10.0B exhibits brittle transgranular characteristics. As the annealing temperature increases, Mo-1.0B undergoes partial recrystallization, transitioning from fragmented strip-like grains (2.72 μm at 900 °C) to approximately equiaxed grains (7.12 μm at 1200 °C). Dislocation density and entanglement are significantly reduced. Mo-1.0B exhibits a significant improvement in plasticity after high-temperature annealing. As the annealing temperature increases, the tensile strength of Mo-1.0B decreases from 791.4 MPa to 540 MPa, while its elongation improves from 21.4 % to 66.2 %, resulting in an ultimate strength–plasticity product exceeding 23 GPa·%. By analyzing the contributions of different strengthening mechanisms in Mo-1.0B at various annealing temperatures, it is determined that at 900 °C, strengthening is primarily governed by dislocation and grain boundary strengthening, whereas at 1000 °C, 1100 °C, and 1200 °C, grain boundary and solution strengthening dominate.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107354"},"PeriodicalIF":4.6,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Metal mordant binding mechanisms in historical silk revealed by spectroscopic and computational analysis 光谱和计算分析揭示了历史丝绸中金属媒染剂的结合机制
IF 4.2 3区 工程技术
Dyes and Pigments Pub Date : 2025-08-04 DOI: 10.1016/j.dyepig.2025.113093
Xuemei Wang , Dehong Ma , Yanfei Wei , Wenting Gu , Yan Wang , Bingbing Liu , Yusheng Lei , Shuang Liang
{"title":"Metal mordant binding mechanisms in historical silk revealed by spectroscopic and computational analysis","authors":"Xuemei Wang ,&nbsp;Dehong Ma ,&nbsp;Yanfei Wei ,&nbsp;Wenting Gu ,&nbsp;Yan Wang ,&nbsp;Bingbing Liu ,&nbsp;Yusheng Lei ,&nbsp;Shuang Liang","doi":"10.1016/j.dyepig.2025.113093","DOIUrl":"10.1016/j.dyepig.2025.113093","url":null,"abstract":"<div><div>This study employs a multi-technique analytical approach to investigate two archaeological silk textiles in red and purple, focusing on the chemical speciation and coordination behavior of alum-based mordants. Dye components were identified using ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-QTOF-MS), and elemental composition was quantified via inductively coupled plasma mass spectrometry (ICP-MS). Based on these results, historically informed dyeing reconstructions were conducted using <em>Rubia tinctorum</em> and <em>Lithospermum erythrorhizon</em> in combination with potassium aluminum sulfate. X-ray photoelectron spectroscopy (XPS) was used to characterize the oxidation states and chemical environments of aluminum, confirming the predominance of Al<sup>3+</sup> and its coordination with dye–fiber matrices. Trace levels of Al<sup>0</sup> detected in archaeological samples were attributed to post-depositional transformation. To further clarify binding mechanisms, density functional theory (DFT) calculations were performed to identify the most stable coordination configurations and explore electron distribution and site selectivity. This integrated methodology offers molecular-level insight into mordant fixation chemistry, enabling the accurate identification of dyeing materials, guiding tailored conservation strategies, and informing the controlled reconstruction of historical dyeing techniques for museum display and cultural heritage restoration.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"243 ","pages":"Article 113093"},"PeriodicalIF":4.2,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
rGO-CuO/WO3 sensor with multiply enhanced gas sensing performance under synergistic effect of p-n heterojunctions and Schottky junctions 在p-n异质结和Schottky结的协同作用下,具有多重增强气敏性能的rGO-CuO/WO3传感器
IF 4.6 3区 材料科学
Materials Science and Engineering: B Pub Date : 2025-08-04 DOI: 10.1016/j.mseb.2025.118660
Xu Chen, Peilin Li, Tao Li, Yiwei Gao, Lianjie Zhu
{"title":"rGO-CuO/WO3 sensor with multiply enhanced gas sensing performance under synergistic effect of p-n heterojunctions and Schottky junctions","authors":"Xu Chen,&nbsp;Peilin Li,&nbsp;Tao Li,&nbsp;Yiwei Gao,&nbsp;Lianjie Zhu","doi":"10.1016/j.mseb.2025.118660","DOIUrl":"10.1016/j.mseb.2025.118660","url":null,"abstract":"<div><div>Design and fabrication of WO<sub>3</sub> composites is a good strategy to enhance gas sensing performance of WO<sub>3</sub>-based sensors. Here, series of rGO-CuO/WO<sub>3</sub> composites were designed by overall taking advantages of highly conductive reduced graphene oxide (rGO) and heterojunctions formed at the interfaces of CuO-WO<sub>3</sub> and rGO-WO<sub>3</sub>. Gas sensing properties of the rGO-CuO/WO<sub>3</sub> sensors to acetone were explored and the sensing mechanism was proposed. The 3 %rGO-CuO/WO<sub>3</sub> sensor exhibited the best gas sensing behavior to acetone with a low detection limit (&lt;1 ppm), wide detection range (1–600 ppm) and excellent stability. Particularly, multiple sensing parameters of the 3 %rGO-CuO/WO<sub>3</sub> sensor, including sensitivity, selectivity to acetone, response-recovery times and optimal operating temperature, were simultaneously improved obviously, compared to those of the pure WO<sub>3</sub> sensor, which is beneficial to practical applications. The enhanced gas sensing behavior of the 3 %rGO-CuO/WO<sub>3</sub> sensor could be attributed to the synergistic effect of the p-n heterojunctions and Schottky junctions.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"322 ","pages":"Article 118660"},"PeriodicalIF":4.6,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Dual-Stimuli Chromogenic Membranes for Optical Security: Photochromic and Halochromic Anti-Counterfeiting Applications. 用于光学安全的双刺激显色膜:光致变色和光致变色防伪应用。
IF 13.3 2区 材料科学
Small Pub Date : 2025-08-04 DOI: 10.1002/smll.202507008
Lin-Ruei Lee,Yi-Fan Chen,Po-Xin Fan,Yu-Chun Lin,Ming-Hsuan Chang,Yu-Chun Liu,Chun-Chi Chang,Jiun-Tai Chen
{"title":"Dual-Stimuli Chromogenic Membranes for Optical Security: Photochromic and Halochromic Anti-Counterfeiting Applications.","authors":"Lin-Ruei Lee,Yi-Fan Chen,Po-Xin Fan,Yu-Chun Lin,Ming-Hsuan Chang,Yu-Chun Liu,Chun-Chi Chang,Jiun-Tai Chen","doi":"10.1002/smll.202507008","DOIUrl":"https://doi.org/10.1002/smll.202507008","url":null,"abstract":"A dual-stimuli chromogenic platform based on spiropyran-functionalized anodic aluminum oxide (SP-t-AAO) membranes with reversible photochromic and halochromic switching is reported. Surface characterization by electronic images confirms the well-preserved nanoporous morphology, while Energy-dispersive X-ray spectroscopy (EDS) scans reveal uniform grafting to micrometer depths. Grazing incidence X-ray photoelectron spectroscopy (GIXPS) and time-of-flight secondary ion mass Spectrometry (TOF-SIMS) further confirm successful surface chemical modification and pattern fidelity. Orthogonal functionalization is achieved via thiol-yne chemistry and spatially controlled photopatterning using Chinese seasonal-themed photomasks. Upon UV irradiation, the membrane exhibits a pale-to-magenta color change because of spiropyran-merocyanine isomerization; acid exposure further switches the color from magenta to yellow. Both transitions are fully reversible under white light or base treatment. Video analysis reveals rapid halochromic switching kinetics (0.4-4 s), highlighting excellent optical responsiveness. The membrane also demonstrates the chelation toward heavy metal ions such as Cu2+ and Fe2+. Moreover, thermal cycling test shows moderate durability, and a 20-day ambient test confirms excellent chromogenic stability. This work offers high-speed responsiveness, spatial precision, and long-term stability for anti-counterfeiting and sensing applications.","PeriodicalId":228,"journal":{"name":"Small","volume":"733 1","pages":"e07008"},"PeriodicalIF":13.3,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144769605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Programmable RNA Nanostructures Enable Nanopore Detection of Cotranscriptionally Introduced RNA Modifications. 可编程RNA纳米结构使纳米孔检测共转录引入的RNA修饰。
IF 10.8 1区 材料科学
Nano Letters Pub Date : 2025-08-04 DOI: 10.1021/acs.nanolett.5c02391
Iva Mohora,Gerardo Patiño Guillén,Kevin Neis,Julián Valero,Ulrich F Keyser,Filip Bošković
{"title":"Programmable RNA Nanostructures Enable Nanopore Detection of Cotranscriptionally Introduced RNA Modifications.","authors":"Iva Mohora,Gerardo Patiño Guillén,Kevin Neis,Julián Valero,Ulrich F Keyser,Filip Bošković","doi":"10.1021/acs.nanolett.5c02391","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02391","url":null,"abstract":"Tracking RNA synthesis and metabolic histories requires cotranscriptional incorporation of modified nucleotides. However, identifying the incorporation of modified nucleotides into nascent RNA remains challenging, particularly for short RNAs. In this work, we developed a method utilizing solid-state nanopores and DNA:RNA nanostructures to detect modified nucleotide incorporation across different RNA length scales, from short to long RNAs transcribed in vitro. We identified the incorporation of biotin-modified uridine in short RNAs using a DNA nanostructure coupled with a nanopore readout. As a proof of concept for tracking RNA synthesis, we evaluated the incorporation of azide-modified uridine into long RNAs. To achieve quantitative labeling, we optimized conditions for click chemistry using cyclooctyne-DNA oligonucleotides. Subsequently, we successfully decorated long RNAs with azide-modified uridine and quantified the relative incorporation levels using nanopores. Our study establishes a robust platform for solid-state nanopore characterization of modified nucleotide-containing RNAs, advancing single-molecule analyses of RNA dynamics.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"13 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144769631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Unlocking Grotthuss Proton Energy Storage in Pyrochlore-Type Tungsten Oxide. 释出焦绿型氧化钨的洞状质子能量储存。
IF 29.4 1区 材料科学
Advanced Materials Pub Date : 2025-08-04 DOI: 10.1002/adma.202508929
Kai Yong,Boya Wang,Xiaoxiao Pan,Jinyan Ni,Qianyu Zhang,Yuan Wu,Qinjian Li,Zhaoyi Luo,Shuxin Zhuang,Zifeng Lin,Hao Wu
{"title":"Unlocking Grotthuss Proton Energy Storage in Pyrochlore-Type Tungsten Oxide.","authors":"Kai Yong,Boya Wang,Xiaoxiao Pan,Jinyan Ni,Qianyu Zhang,Yuan Wu,Qinjian Li,Zhaoyi Luo,Shuxin Zhuang,Zifeng Lin,Hao Wu","doi":"10.1002/adma.202508929","DOIUrl":"https://doi.org/10.1002/adma.202508929","url":null,"abstract":"It is of momentous significance to identify suitable proton-storage electrode materials inherent with Grotthuss topochemistry toward high-power aqueous proton batteries. However, currently reported oxide electrode materials have seldom conformed to the Grotthuss mechanism. Here Grotthuss mechanism-dominated proton storage is showcased in a novel 3D-tunnel-structured pyrochlore-type WO3·0.5H2O (WOH), together with a reliable and effective approach to amplifying its Grotthuss conduction effect. Different from other phases of tungsten oxide (e.g., orthorhombic, monoclinic, and hexagonal), the zeolitic-water-enriched cubic pyrochlore WOH favors proton-hopping akin to \"Newton's cradle\" instead of traditional \"vehicle-like\" transport. Interestingly, introducing trace Ni(II) ions into the WOH (NWOH) is find to notably increase the content of structural water in lattice, thereby reframing the hydrogen-bonding network along with enhanced proton transfer capability as a consequence of its largely reduced activation energy as low as 0.08 eV. Hence, NWOH shows boosted reversible capacity of 71 mAh g-1 at 100C, ultrafast charging capability up to 500C, and ultralong cycling life over 30,000 cycles. Once coupled with Prussian blue analogue cathodes with identical Grotthuss conduction mechanism, the resultant high-output-voltage full-cells (≈1.1 V) sustain high-rate cycling with high energy/power density and operate at a wide working temperature from -20 to 50 °C.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"28 1","pages":"e08929"},"PeriodicalIF":29.4,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144769812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Crystallization Modulation Through Electron Transport Layer Surface Reconstruction Enables High-Performance Full-Air-Processed Perovskite Solar Cells. 通过电子传输层表面重建的结晶调制实现高性能全空气处理钙钛矿太阳能电池。
IF 29.4 1区 材料科学
Advanced Materials Pub Date : 2025-08-04 DOI: 10.1002/adma.202510967
Haichao Yang,Zhihao Guo,Zhiyuan Xu,Wensi Cai,Saif M H Qaid,Zhigang Zang
{"title":"Crystallization Modulation Through Electron Transport Layer Surface Reconstruction Enables High-Performance Full-Air-Processed Perovskite Solar Cells.","authors":"Haichao Yang,Zhihao Guo,Zhiyuan Xu,Wensi Cai,Saif M H Qaid,Zhigang Zang","doi":"10.1002/adma.202510967","DOIUrl":"https://doi.org/10.1002/adma.202510967","url":null,"abstract":"The quality of the buried interface critically determines the performance of perovskite solar cells (PSCs). Herein, a homogenization strategy for the tin oxide (SnO2) electron transport layer (ETL) based on surface reconstruction is developed to enable mesoscale interface manipulation. By introducing the natural L-carnosine (LC) at the buried interface, we achieve homogenized photon and electron transport through surface optimization of the SnO2 ETL. Additionally, the multi-active sites in LC establish interlayer bridging and optimize interfacial contact, simultaneously passivating interfacial defects, mitigating residual stress, and improving carrier dynamics. Furthermore, LC modification regulates perovskite crystallization kinetics through multiple bonding mechanisms, facilitating the growth of high-quality perovskite films. Ultimately, the champion device fabricated entirely in air achieves a power conversion efficiency of 25.30%, one of the highest efficiencies reported for air-processed n-i-p structured PSCs. The optimized device without encapsulation exhibits enhanced stability under ISOS protocols, retaining 91.03% of its initial efficiency after 3192 h at 30 ± 5% relative humidity, 90.71% after 1512 h of thermal aging at 65 °C, and 90.17% after 1000 h of continuous maximum power point tracking under one-sun illumination.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"30 1","pages":"e10967"},"PeriodicalIF":29.4,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144769813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Decoupling the Exciton-Carrier Interaction for Highly Efficient Pure Blue Perovskite Light-Emitting Diodes Exceeding 20. 超过20的高效纯蓝钙钛矿发光二极管激子-载流子相互作用的解耦。
IF 29.4 1区 材料科学
Advanced Materials Pub Date : 2025-08-04 DOI: 10.1002/adma.202420131
Zhiwei Yao,Chenghao Bi,Rui Xu,Xuanyu Zhang,Lei Qian,Chaoyu Xiang
{"title":"Decoupling the Exciton-Carrier Interaction for Highly Efficient Pure Blue Perovskite Light-Emitting Diodes Exceeding 20.","authors":"Zhiwei Yao,Chenghao Bi,Rui Xu,Xuanyu Zhang,Lei Qian,Chaoyu Xiang","doi":"10.1002/adma.202420131","DOIUrl":"https://doi.org/10.1002/adma.202420131","url":null,"abstract":"Pure blue emission (wavelength ≤ 470 nm) is essential for perovskite light-emitting diodes (PeLEDs) in the application of future displays. However, the performance of the pure blue PeLEDs is far away from the application requirement and theoretical values. The charging of excitons plays a crucial role in the non-radiative decay of the high-energy blue perovskite emitters under electric fields. Here, a designed exciton-carrier decoupling emitting layer (De-EML) is reported which can simultaneously suppress the formation of charged excitons and facilitate the injection of carriers. By tuning the energy levels of each QD layer in the De-EML, the photoluminescence quantum yield (PLQY) reached 83.7%, and the Auger recombination related to exciton-carrier coupling in high excitation intensities is suppressed. Based on the designed De-EML, high-performance pure-blue PeLEDs (emission at 469 nm) with an EQE of 20.3% and an operational lifetime (T80) of 4.8 h at 1070 cd m-2 is demonstrated. A record maximum brightness of 31 407 cd m-2 is also achieved.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"15 1","pages":"e20131"},"PeriodicalIF":29.4,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144769857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Defect Engineering toward High-Performance Tin-Based Perovskite Field-Effect Transistors. 高性能锡基钙钛矿场效应晶体管的缺陷工程。
IF 29.4 1区 材料科学
Advanced Materials Pub Date : 2025-08-04 DOI: 10.1002/adma.202504087
Xiaohan Zai,He Dong,Zihong Shen,Delei Ji,Xue Dong,Chenxin Ran,Zhongbin Wu
{"title":"Defect Engineering toward High-Performance Tin-Based Perovskite Field-Effect Transistors.","authors":"Xiaohan Zai,He Dong,Zihong Shen,Delei Ji,Xue Dong,Chenxin Ran,Zhongbin Wu","doi":"10.1002/adma.202504087","DOIUrl":"https://doi.org/10.1002/adma.202504087","url":null,"abstract":"Tin (Sn)-based perovskite field-effect transistors (FETs) have garnered considerable attention as promising candidates for next-generation electronics and optoelectronics due to their exceptional charge transport properties, cost-effectiveness, and eco-friendly nature. However, owing to facile Sn vacancy formation, serious oxidation as well as uncontrollable crystallization, Sn-based perovskites generally suffer from inferior film quality with high-density defects, resulting in unfavorable self-doping effects with high hole concentrations. Furthermore, defects within the relatively thin films (tens of nanometers) of these FETs, primarily located at the surface and grain boundaries (GBs) of perovskite films, significantly impact the charge transport, ion migration, and structural stability during device operation, thereby impeding the achievement of high-performance Sn-based perovskite FETs. Herein, a comprehensive overview of defect properties, origins, and their influence on the performance of Sn-based perovskite FETs is present. In particular, the advanced defect passivation strategies, including compositional engineering, dopant modification, dimensional engineering, interface passivation, and crystallization regulation are summarized systematically. Lastly, the existing challenges and potential future prospects regarding defect engineering are proposed to achieve high-performance Sn-based perovskite FETs, which will pave the way for further large-scale integration applications.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"21 1","pages":"e04087"},"PeriodicalIF":29.4,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144769863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
The influence of SiC particles and precipitates on cryogenic deformation of Al-Cu alloy matrix composites SiC颗粒和析出物对Al-Cu合金基复合材料低温变形的影响
IF 6.3 2区 材料科学
Journal of Alloys and Compounds Pub Date : 2025-08-04 DOI: 10.1016/j.jallcom.2025.182709
Mingli Zhang , Kaixuan Gu , Bojan Podgornik , Xiujie Zhao , Ran Pan , Baosheng Liu , Junjie Wang
{"title":"The influence of SiC particles and precipitates on cryogenic deformation of Al-Cu alloy matrix composites","authors":"Mingli Zhang ,&nbsp;Kaixuan Gu ,&nbsp;Bojan Podgornik ,&nbsp;Xiujie Zhao ,&nbsp;Ran Pan ,&nbsp;Baosheng Liu ,&nbsp;Junjie Wang","doi":"10.1016/j.jallcom.2025.182709","DOIUrl":"10.1016/j.jallcom.2025.182709","url":null,"abstract":"<div><div>In the present work, the cryogenic deformation behavior of 15 vol% SiC particles reinforced Al-Cu alloy composites at different temperatures (RT, −80 ℃, −120 ℃, −160 ℃ and −190 ℃) and strain rates (0.00025 s<sup>−1</sup>, 0.001 s<sup>−1</sup> and 0.01 s<sup>−1</sup>) were investigated. The influence of SiC particles and precipitates on cryogenic deformation of aluminum matrix composites had been revealed by optical microscope (OM), electron back scattered diffraction (EBSD) and transmission electron microscopy (TEM). The results showed that the optimal strength-ductility balance were obtained for the solution-treated (W) samples at −190 ℃ with a strain rate of 0.01 s<sup>−1</sup>. Notably, the W samples achieved a simultaneous increase in tensile strength (UTS), yield strength (YS) and elongation at −190 ℃, and increased by 10.7 %, 38.5 % and 27.4 %, respectively, compared to room temperature (RT). This improvement originates from the formation of sub-grains induced by the dynamic recovery of a large amount of dislocations at the interface during the deformation at cryogenic temperature, which results in effective grain refinement of the sample. For the peak aged (T6) samples, significant strength increases of 22.2 % (UTS) and 35.7 % (YS) were achieved at −190 ℃ with a strain rate of 0.01 s<sup>−1</sup> while maintaining comparable ductility to RT. The improvement primarily results from the cryogenic temperature inhibits the back-dissolution of uniformly needle-like S′ phases as well as the precipitation of the non-uniform S′ phases, and makes the dislocation cut through the θ' phases at the interfaces. In addition, the plasticity of the T6 samples is relatively poor and insensitive to the deformation temperature compared to the W samples. This is attributed to the stronger pinning effect of the precipitation on the dislocations and the obstruction of the dislocations by SiC particles, which results in more difficult plastic deformation. It can be concluded that the effect of SiC particles and precipitation on dislocation motion is the main reason for the improved tensile properties at cryogenic temperatures.</div></div>","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"1038 ","pages":"Article 182709"},"PeriodicalIF":6.3,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
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