Pub Date : 2026-09-07DOI: 10.1016/j.matlet.2026.141601
Thi Dinh Ngo, Dat Minh Tran, Xuan-Loc Nguyen, Thanh-Nha Tran, Nam Nguyen Dang
Organic polymer coatings are considered a promising approach for enhancing the resistance of steel substrates in harsh environments. This work presents an efficient method to fabricate spin-coated PMMA thin films with improvements in thickness uniformity, surface morphology, and protective performance on a carbon steel substrate. The coated sample presented the highest contact angle up to 87°, while electrochemical measurements revealed significantly improved corrosion resistance with a protection efficiency of 92.70 ± 3.02% at 405.84 nm of coating thickness. These findings indicate that PMMA thin films are promising for enhancing the corrosion resistance of carbon steel in various applications.
{"title":"Introducing the electrochemical behavior of PMMA coating on carbon steel in simulated seawater solution","authors":"Thi Dinh Ngo, Dat Minh Tran, Xuan-Loc Nguyen, Thanh-Nha Tran, Nam Nguyen Dang","doi":"10.1016/j.matlet.2026.141601","DOIUrl":"10.1016/j.matlet.2026.141601","url":null,"abstract":"<div><div>Organic polymer coatings are considered a promising approach for enhancing the resistance of steel substrates in harsh environments. This work presents an efficient method to fabricate spin-coated PMMA thin films with improvements in thickness uniformity, surface morphology, and protective performance on a carbon steel substrate. The coated sample presented the highest contact angle up to 87°, while electrochemical measurements revealed significantly improved corrosion resistance with a protection efficiency of 92.70 ± 3.02% at 405.84 nm of coating thickness. These findings indicate that PMMA thin films are promising for enhancing the corrosion resistance of carbon steel in various applications.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"425 ","pages":"Article 141601"},"PeriodicalIF":2.6,"publicationDate":"2026-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148939399","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}
Pub Date : 2026-05-05DOI: 10.1016/j.matlet.2026.140806
Dariusz Szeliga , Rafał Cygan
The mitigation of stray grain (SG) formation in a single-crystal (SX) blade platform was investigated. A strategy based on the grain-guiding concept was developed to reduce defects during directional solidification of superalloy. In this technique, triangular geometry grain continuators (TGCs) were connected to the sidewall of the root and the platform edges. This approach resulted in the successive branching of dendrites along two independent paths instead of the extensive branching and irregular dendritic growth that was observed in the process without TGCs. Consequently, a favorable, uniform distribution of primary dendrite arm spacing values was achieved in the platform with TGCs. This indicated a reduction in asymmetric cooling conditions, particularly in the corner of the shadow zone of the platform. As a result, susceptibility to the formation of SG and low-angle grain boundaries decreased, and fine equiaxed grains were eliminated. This phenomenon was attributed to a reduction in the area of undercooled melt in the platform.
{"title":"Preventing the formation of stray grains in single-crystal blade platforms using a triangular grain continuator","authors":"Dariusz Szeliga , Rafał Cygan","doi":"10.1016/j.matlet.2026.140806","DOIUrl":"10.1016/j.matlet.2026.140806","url":null,"abstract":"<div><div>The mitigation of stray grain (SG) formation in a single-crystal (SX) blade platform was investigated. A strategy based on the grain-guiding concept was developed to reduce defects during directional solidification of superalloy. In this technique, triangular geometry grain continuators (TGCs) were connected to the sidewall of the root and the platform edges. This approach resulted in the successive branching of dendrites along two independent paths instead of the extensive branching and irregular dendritic growth that was observed in the process without TGCs. Consequently, a favorable, uniform distribution of primary dendrite arm spacing values was achieved in the platform with TGCs. This indicated a reduction in asymmetric cooling conditions, particularly in the corner of the shadow zone of the platform. As a result, susceptibility to the formation of SG and low-angle grain boundaries decreased, and fine equiaxed grains were eliminated. This phenomenon was attributed to a reduction in the area of undercooled melt in the platform.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"418 ","pages":"Article 140806"},"PeriodicalIF":2.7,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147827459","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}
This study investigates the dependence of ductile fracture-initiation strain on the Lode angle in aluminum alloy 5083-O to help identify an appropriate phenomenological damage model for crack propagation simulations. Novel rectangular-notched (RN) tensile specimens were used to overcome the coupled variation of stress-state parameters in conventional test matrices. Finite element analysis showed that the RN specimens could vary the normalized Lode angle parameter independently from 0.01 to 0.92 while maintaining the average stress triaxiality in the central fracture-initiation zone at approximately 0.70. Quasi-static tensile tests and corresponding simulations revealed only slight variation in the fracture-initiation strain, with mean values ranging from 0.268 to 0.278 and limited scatter for all specimen configurations, despite a clear morphological transition from equiaxed to elongated dimples. These results indicate weak apparent sensitivity of the fracture-initiation strain of AA5083-O to the Lode angle under the investigated stress states. For engineering prediction of typical Mode I crack propagation in AA5083-O, a conventional triaxiality-dependent fracture model without explicit Lode-angle incorporation thus appears to be a reasonable simplification.
{"title":"Effect of lode angle on the ductile fracture strain of aluminum alloy AA5083-O","authors":"Xixian Li , Fuminori Yanagimoto , Shohei Uranaka , Chenjun Yu , Tomoya Kawabata","doi":"10.1016/j.matlet.2026.140818","DOIUrl":"10.1016/j.matlet.2026.140818","url":null,"abstract":"<div><div>This study investigates the dependence of ductile fracture-initiation strain on the Lode angle in aluminum alloy 5083-O to help identify an appropriate phenomenological damage model for crack propagation simulations. Novel rectangular-notched (RN) tensile specimens were used to overcome the coupled variation of stress-state parameters in conventional test matrices. Finite element analysis showed that the RN specimens could vary the normalized Lode angle parameter independently from 0.01 to 0.92 while maintaining the average stress triaxiality in the central fracture-initiation zone at approximately 0.70. Quasi-static tensile tests and corresponding simulations revealed only slight variation in the fracture-initiation strain, with mean values ranging from 0.268 to 0.278 and limited scatter for all specimen configurations, despite a clear morphological transition from equiaxed to elongated dimples. These results indicate weak apparent sensitivity of the fracture-initiation strain of AA5083-O to the Lode angle under the investigated stress states. For engineering prediction of typical Mode I crack propagation in AA5083-O, a conventional triaxiality-dependent fracture model without explicit Lode-angle incorporation thus appears to be a reasonable simplification.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"418 ","pages":"Article 140818"},"PeriodicalIF":2.7,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147827463","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}
As a potentially effective strategy to improve the chemistry and mechanics of the interface of glass-based/steel joints for high-temperature applications, the role of three ceramic interlayers, including 8% molY2O3-ZrO2 (8YSZ), MnCo2O4 and Al2O3, was examined using thermoelastic multilayer stress modeling, aging-dependent stress evolution, and detailed chemical/microstructural characterization. Mapping the in-layer stress reveals that the thermoelastic properties of the interlayer govern the residual stress distribution in glass/steel joints, enabling the rational design of mechanically stable interfaces for high-temperature sealing systems. The combined mechanical and chemical assessments demonstrate that 8YSZ is the most reliable interlayer for suppressing detrimental seal/interconnect interactions in high-temperature operating conditions.
{"title":"Interfacial engineering of glass-ceramic/steel joints using ceramic interlayers: designing thermoelastic stress and chemical stability","authors":"Hamid Abdoli , Masood Fakouri Hasanabadi , Hamidreza Farnoush","doi":"10.1016/j.matlet.2026.140252","DOIUrl":"10.1016/j.matlet.2026.140252","url":null,"abstract":"<div><div>As a potentially effective strategy to improve the chemistry and mechanics of the interface of glass-based/steel joints for high-temperature applications, the role of three ceramic interlayers, including 8% molY<sub>2</sub>O<sub>3</sub>-ZrO<sub>2</sub> (8YSZ), MnCo<sub>2</sub>O<sub>4</sub> and Al<sub>2</sub>O<sub>3</sub>, was examined using thermoelastic multilayer stress modeling, aging-dependent stress evolution, and detailed chemical/microstructural characterization. Mapping the in-layer stress reveals that the thermoelastic properties of the interlayer govern the residual stress distribution in glass/steel joints, enabling the rational design of mechanically stable interfaces for high-temperature sealing systems. The combined mechanical and chemical assessments demonstrate that 8YSZ is the most reliable interlayer for suppressing detrimental seal/interconnect interactions in high-temperature operating conditions.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140252"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187177","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}
Pub Date : 2026-05-01Epub Date: 2026-02-10DOI: 10.1016/j.matlet.2026.140243
Pengyu Li, Xiaohua Feng, Mingsheng Wang, Xiaotian Feng, Yi Liu, Hua Li
Understanding the role of surface layers and developing thickness-insensitive microwave absorbing coatings are critical for practical applications. In this work, short-term atomic oxygen (AO) treatment selectively reconstructs only the top ∼10 μm of a porous polyimide/BaFe₁₂O₁₉/carbon nanosphere coating, enabling effective Ku-band absorption across a broad thickness range of 2.8–3.4 mm. The AO-induced surface layer introduces defect sites and disrupts local conductive pathways, reducing electrical conductivity from 0.23 to 0.22 S/m. This suppression of conduction loss improves impedance matching, while the preserved porous interior maintains strong attenuation capability. The synergy between the reconstructed surface and the internal porous framework leads to a smoother evolution of input impedance with varying thickness-key to achieving thickness-insensitive microwave absorption. The optimized coating further exhibits enhanced electromagnetic stability, including approximately 25% greater radar cross-section (RCS) reduction and expanded polarization-insensitive angular ranges by 10° in TE mode and 20° in TM mode.
{"title":"Surface-reconstructed porous PI/BaFe12O19/CS coatings with thickness-insensitive microwave absorption","authors":"Pengyu Li, Xiaohua Feng, Mingsheng Wang, Xiaotian Feng, Yi Liu, Hua Li","doi":"10.1016/j.matlet.2026.140243","DOIUrl":"10.1016/j.matlet.2026.140243","url":null,"abstract":"<div><div>Understanding the role of surface layers and developing thickness-insensitive microwave absorbing coatings are critical for practical applications. In this work, short-term atomic oxygen (AO) treatment selectively reconstructs only the top ∼10 μm of a porous polyimide/BaFe₁₂O₁₉/carbon nanosphere coating, enabling effective <em>Ku</em>-band absorption across a broad thickness range of 2.8–3.4 mm. The AO-induced surface layer introduces defect sites and disrupts local conductive pathways, reducing electrical conductivity from 0.23 to 0.22 S/m. This suppression of conduction loss improves impedance matching, while the preserved porous interior maintains strong attenuation capability. The synergy between the reconstructed surface and the internal porous framework leads to a smoother evolution of input impedance with varying thickness-key to achieving thickness-insensitive microwave absorption. The optimized coating further exhibits enhanced electromagnetic stability, including approximately 25% greater radar cross-section (<em>RCS</em>) reduction and expanded polarization-insensitive angular ranges by 10° in <em>TE</em> mode and 20° in <em>TM</em> mode.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140243"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187175","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}
Pub Date : 2026-05-01Epub Date: 2026-02-06DOI: 10.1016/j.matlet.2026.140224
Qidong Liang , Junnan Wu , Haiyang Peng , Yinjie Liu , Rui He , Bin Zhu , Xiaodan Li , Leiying Zeng , Shuxin Zhuang
Olivine LiFe0.5Mn0.5PO₄ is a promising cathode material for lithium-ion batteries owing to its excellent structural stability and high operating voltage. However, its intrinsically low electronic conductivity and Mn dissolution severely limited its large-scale applications. Herein, an L-tartaric-acid-assisted carbon coating strategy is developed to fabricate carbon-coated LiFe0.5Mn0.5PO₄ by a facile rheological phase reaction method. Density functional theory calculations combined with electrochemical analyses reveal that the –COOH and –OH groups of L-tartaric acid would promote strong interfacial interactions with LiFe0.5Mn0.5PO₄ and facilitate the formation of a uniform and continuous carbon coating on the matrix, thereby accelerating charge-transfer and inhibiting Mn dissolution. As a result, the optimized LFMP-0.5 delivers a high specific capacity of 158.7 mAh/g at 0.1C and improved cycling stability, maintaining a capacity retention rate of 95.97% after 500 cycles at 1C. This work demonstrates an effective and scalable carbon coating strategy for improving olivine phosphate cathodes and provides new insights into the rational design of high-performance lithium-ion batteries.
{"title":"Stabilizing the cycling capability of LiFe0.5Mn0.5PO4 by carbon encapsulation for lithium-ion batteries","authors":"Qidong Liang , Junnan Wu , Haiyang Peng , Yinjie Liu , Rui He , Bin Zhu , Xiaodan Li , Leiying Zeng , Shuxin Zhuang","doi":"10.1016/j.matlet.2026.140224","DOIUrl":"10.1016/j.matlet.2026.140224","url":null,"abstract":"<div><div>Olivine LiFe<sub>0.5</sub>Mn<sub>0.5</sub>PO₄ is a promising cathode material for lithium-ion batteries owing to its excellent structural stability and high operating voltage. However, its intrinsically low electronic conductivity and Mn dissolution severely limited its large-scale applications. Herein, an <em>L</em>-tartaric-acid-assisted carbon coating strategy is developed to fabricate carbon-coated LiFe<sub>0.5</sub>Mn<sub>0.5</sub>PO₄ by a facile rheological phase reaction method. Density functional theory calculations combined with electrochemical analyses reveal that the –COOH and –OH groups of <em>L</em>-tartaric acid would promote strong interfacial interactions with LiFe<sub>0.5</sub>Mn<sub>0.5</sub>PO₄ and facilitate the formation of a uniform and continuous carbon coating on the matrix, thereby accelerating charge-transfer and inhibiting Mn dissolution. As a result, the optimized LFMP-0.5 delivers a high specific capacity of 158.7 mAh/g at 0.1C and improved cycling stability, maintaining a capacity retention rate of 95.97% after 500 cycles at 1C. This work demonstrates an effective and scalable carbon coating strategy for improving olivine phosphate cathodes and provides new insights into the rational design of high-performance lithium-ion batteries.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140224"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146147222","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}
Pub Date : 2026-05-01Epub Date: 2026-02-09DOI: 10.1016/j.matlet.2026.140158
Yusuke Morimoto , Hiroya Abe , Yoshikazu Suzuki
We have prepared a novel “labyrinth-like” nickel‑cobalt oxide porous electrode using a short-time electrodeposition. Scanning electron microscopy revealed that 2-D sheets of nickel‑cobalt oxide were aggregated to form bimodal pores with a size distribution ranging from ∼10 nm to 10 μm on the substrate. The shape and size of the pores changed with the electrodeposition time. In particular, the pores in the 60 s electrodeposited sample transformed into a complex labyrinth-like structure. The sample exhibited a specific capacitance of 3670 F/g at 2 A/g and retained 79% of its capacitance after 750 cycles. This porous structure improved the electrochemical parameters.
我们利用短时间电沉积制备了一种新型的“迷宫状”镍钴氧化物多孔电极。扫描电镜显示，镍钴氧化物的二维薄片在衬底上聚集形成双峰孔，其尺寸分布在~ 10 nm ~ 10 μm之间。孔的形状和大小随电沉积时间的变化而变化。特别是60年代电沉积样品的孔隙转变成复杂的迷宫状结构。该样品在2 a /g时的比电容为3670 F/g，在750次循环后保持了79%的电容。这种多孔结构改善了电化学参数。
{"title":"Ultrahigh specific capacitance of 3670 F/g supercapacitor electrode achieved by nickel‑cobalt oxide with labyrinth-like porous structure","authors":"Yusuke Morimoto , Hiroya Abe , Yoshikazu Suzuki","doi":"10.1016/j.matlet.2026.140158","DOIUrl":"10.1016/j.matlet.2026.140158","url":null,"abstract":"<div><div>We have prepared a novel “labyrinth-like” nickel‑cobalt oxide porous electrode using a short-time electrodeposition. Scanning electron microscopy revealed that 2-D sheets of nickel‑cobalt oxide were aggregated to form bimodal pores with a size distribution ranging from ∼10 nm to 10 μm on the substrate. The shape and size of the pores changed with the electrodeposition time. In particular, the pores in the 60 s electrodeposited sample transformed into a complex labyrinth-like structure. The sample exhibited a specific capacitance of 3670 F/g at 2 A/g and retained 79% of its capacitance after 750 cycles. This porous structure improved the electrochemical parameters.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140158"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187163","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}
Pub Date : 2026-05-01Epub Date: 2026-02-06DOI: 10.1016/j.matlet.2026.140225
Joonsoo Byeon, Ha Yeon Choi, Ju Yong Shin, Seung Ri Jeong, Shivam Kumar Gautam, Hi-Deok Lee
Two-dimensional transition metal dichalcogenide (TMDC) materials have unique structural and chemical properties, which makes them suitable for next-generation devices. However, high contact resistance between TMDCs and metal contacts limits the device performance. Metallic 1 T phase at the interface facilitates charge injection and reduce the contact resistance. This study reports on a low-frequency Ar/O2 plasma technique for achieving a uniform and clean 2H → 1 T phase transition in MoS2, confirmed through Raman, PL, TEM and XPS measurements. Furthermore, this study demonstrates that oxygen-based treatment can form MoO bonds and create a uniform surface, thereby passivating the defects present on the MoS2 surface, as analyzed by XPS and AFM. This research opens up new possibilities for phase transition techniques, suggesting that they can enhance the contact properties between MoS2 and metals, thereby improving device characteristics.
{"title":"Phase engineering of MoS2 via Ar/O2 plasma treatment","authors":"Joonsoo Byeon, Ha Yeon Choi, Ju Yong Shin, Seung Ri Jeong, Shivam Kumar Gautam, Hi-Deok Lee","doi":"10.1016/j.matlet.2026.140225","DOIUrl":"10.1016/j.matlet.2026.140225","url":null,"abstract":"<div><div>Two-dimensional transition metal dichalcogenide (TMDC) materials have unique structural and chemical properties, which makes them suitable for next-generation devices. However, high contact resistance between TMDCs and metal contacts limits the device performance. Metallic 1 T phase at the interface facilitates charge injection and reduce the contact resistance. This study reports on a low-frequency Ar/O<sub>2</sub> plasma technique for achieving a uniform and clean 2H → 1 T phase transition in MoS<sub>2</sub>, confirmed through Raman, PL, TEM and XPS measurements. Furthermore, this study demonstrates that oxygen-based treatment can form Mo<img>O bonds and create a uniform surface, thereby passivating the defects present on the MoS<sub>2</sub> surface, as analyzed by XPS and AFM. This research opens up new possibilities for phase transition techniques, suggesting that they can enhance the contact properties between MoS<sub>2</sub> and metals, thereby improving device characteristics.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140225"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187164","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}
This study aimed to investigate the effect of pH on the green synthesis of silver nanoparticles using Blumea lacera (Bl) leaf extract and their anti-inflammatory properties. TEM analysis showed that the synthesized materials had a spherical shape and particle sizes began to decrease from 28 nm to 16 nm as the pH increased from 8.0 to 11.0. AgNPs synthesized at pH 11 exhibited higher anti-inflammatory activity (∼92% inhibition) when compared with synthesized AgNPs at pH 8.0–10.0 (86–47% inhibition). A proposed mechanism for AgNPs formation under alkaline medium was also presented.
{"title":"pH-driven biosynthesis of silver nanoparticles using Blumea lacera leaf extract with enhanced anti-inflammatory activity","authors":"Sumon Ganguli , Md Abid Hasan , Sabonty Bhattacharjee , Suman Barua , Nakshi Saha , Sabbir Howlader , Sreebash Chandra Bhattacharjee , Farhana Rumzum Bhuiyan , Samiran Bhattacharjee","doi":"10.1016/j.matlet.2026.140231","DOIUrl":"10.1016/j.matlet.2026.140231","url":null,"abstract":"<div><div>This study aimed to investigate the effect of pH on the green synthesis of silver nanoparticles using <em>Blumea lacera</em> (<em>Bl</em>) leaf extract and their anti-inflammatory properties. TEM analysis showed that the synthesized materials had a spherical shape and particle sizes began to decrease from 28 nm to 16 nm as the pH increased from 8.0 to 11.0. AgNPs synthesized at pH 11 exhibited higher anti-inflammatory activity (∼92% inhibition) when compared with synthesized AgNPs at pH 8.0–10.0 (86–47% inhibition). A proposed mechanism for AgNPs formation under alkaline medium was also presented.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140231"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146147223","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}
Pub Date : 2026-05-01Epub Date: 2026-02-10DOI: 10.1016/j.matlet.2026.140199
Wen Shen , Rong Wang , Fen Ao , Jiaru Hu , Pi Yan , Junyao Zhang , Xuemei Ge
To address the challenges of permeability control and limited functionality in organ-on-a-chip biomembranes, this study developed a composite bionic membrane with an asymmetric wettability structure. The “hydrophobic-on-top, hydrophilic-below” configuration utilizes interfacial capillary forces as a built-in directional “micropump” to regulate substance transport effectively. Characterization confirmed the membrane's well-ordered topology, stable three-dimensional network, and intended wettability. Permeation experiments with β-nicotinamide mononucleotide (NMN) validated the capillary-driven transport mechanism. These results demonstrate the membrane's capability to enhance drug permeation efficiency and provide a new material platform for developing predictive, high-performance chip systems.
{"title":"Research on hydrophilic-hydrophobic composite membrane materials for functional blood-brain barrier permeability organ-on-a-chip systems","authors":"Wen Shen , Rong Wang , Fen Ao , Jiaru Hu , Pi Yan , Junyao Zhang , Xuemei Ge","doi":"10.1016/j.matlet.2026.140199","DOIUrl":"10.1016/j.matlet.2026.140199","url":null,"abstract":"<div><div>To address the challenges of permeability control and limited functionality in organ-on-a-chip biomembranes, this study developed a composite bionic membrane with an asymmetric wettability structure. The “hydrophobic-on-top, hydrophilic-below” configuration utilizes interfacial capillary forces as a built-in directional “micropump” to regulate substance transport effectively. Characterization confirmed the membrane's well-ordered topology, stable three-dimensional network, and intended wettability. Permeation experiments with β-nicotinamide mononucleotide (NMN) validated the capillary-driven transport mechanism. These results demonstrate the membrane's capability to enhance drug permeation efficiency and provide a new material platform for developing predictive, high-performance chip systems.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140199"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187165","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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