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Assessment of long-term stability in silver nanoparticles generated by gamma radiation 评估伽马辐射产生的银纳米粒子的长期稳定性
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-06 DOI: 10.1016/j.matlet.2024.137634
Maria José Alves Oliveira , Gethzemani Mayeli Estrada Villegas , Larissa Otubo , Abril Fonseca García , Giovanni Gonzalez-Pérez , Pablo Antonio Salvador Vasquez
{"title":"Assessment of long-term stability in silver nanoparticles generated by gamma radiation","authors":"Maria José Alves Oliveira ,&nbsp;Gethzemani Mayeli Estrada Villegas ,&nbsp;Larissa Otubo ,&nbsp;Abril Fonseca García ,&nbsp;Giovanni Gonzalez-Pérez ,&nbsp;Pablo Antonio Salvador Vasquez","doi":"10.1016/j.matlet.2024.137634","DOIUrl":"10.1016/j.matlet.2024.137634","url":null,"abstract":"<div><div>A modified electrolytic method that employed the suspension of silver ions (Ag<sup>+</sup>) and subsequent exposure to gamma radiation at doses of 10, 25, 50, and 70 kGy (kGy) formed the silver nanoparticles (AgNPs). The stability of the AgNPs was monitored over a period of 12 months using UV Vis Spectrophotometry (UV–Vis), Transmission electron microscope (TEM) and Dynamic light scattering (DLS). In particular, AgNPs irradiated at 10 kGy exhibited the most favorable stability of the samples tested, with the additional advantage of requiring less energy for production due to the lower dose employed.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137634"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656513","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
In-situ alloying of a Zr-based bulk metallic glass composite via powder-fed laser additive manufacturing and pure elemental blend 通过粉末激光增材制造和纯元素混合原位合金化 Zr 基大块金属玻璃复合材料
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-06 DOI: 10.1016/j.matlet.2024.137684
Mazyar Ansari , Ehsan Toyserkani
{"title":"In-situ alloying of a Zr-based bulk metallic glass composite via powder-fed laser additive manufacturing and pure elemental blend","authors":"Mazyar Ansari ,&nbsp;Ehsan Toyserkani","doi":"10.1016/j.matlet.2024.137684","DOIUrl":"10.1016/j.matlet.2024.137684","url":null,"abstract":"<div><div>This study investigates the feasibility of synthesizing a ZrCuAlNb bulk metallic glass composite through in-situ alloying of pure elemental powder blend using powder-fed laser-directed energy deposition. The process parameters are carefully optimized and multiple laser remelting is applied to address the chemical inhomogeneity and elemental micro-segregation. A detailed microstructural examination confirms the successful discovery and development of an amorphous-crystalline composite structure.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137684"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intestinal incision site infections: Evaluation of antimicrobial-coated vicryl sutures in preventing postoperative infections 肠道切口部位感染：评估抗菌涂层 vicryl 缝线对预防术后感染的作用
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-06 DOI: 10.1016/j.matlet.2024.137683
Sobia Rafique , Muhammad Shoaib Butt
{"title":"Intestinal incision site infections: Evaluation of antimicrobial-coated vicryl sutures in preventing postoperative infections","authors":"Sobia Rafique ,&nbsp;Muhammad Shoaib Butt","doi":"10.1016/j.matlet.2024.137683","DOIUrl":"10.1016/j.matlet.2024.137683","url":null,"abstract":"<div><div>This research focused on the development of an antimicrobial polymeric composite coating of polyethylene glycol (PEG) infused with zinc oxide nanoparticles (ZnO) and herbal extracts from Curcuma longa (turmeric). The synthesized composite is coated on a biodegradable vicryl suture via the dip coating method. Instrumental characterization, including Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), was utilized to confirm the chemical composition and surface of the coated suture. The antimicrobial activity was evaluated against bacterial pathogens, Gram-positive (<em>Staphylococcus aureus</em> and <em>Enterococcus faecalis</em>) and Gram-negative (<em>Escherichia coli</em> and <em>Pseudomonas aeruginosa</em>). The water contact angle was measured to determine surface wettability. Degradation studies were conducted in simulated intestinal fluid (SIF) to determine the coated suture’s longevity.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137683"},"PeriodicalIF":2.7,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656615","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
Preparation of efficient and stable FA0.75MA0.25SnI3 perovskite solar cells using passivation materials with multiple F hydrophobic group 使用带有多个 F 疏水基团的钝化材料制备高效稳定的 FA0.75MA0.25SnI3 包晶太阳能电池
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-05 DOI: 10.1016/j.matlet.2024.137667
M.H. Wang , L. Zhang
{"title":"Preparation of efficient and stable FA0.75MA0.25SnI3 perovskite solar cells using passivation materials with multiple F hydrophobic group","authors":"M.H. Wang ,&nbsp;L. Zhang","doi":"10.1016/j.matlet.2024.137667","DOIUrl":"10.1016/j.matlet.2024.137667","url":null,"abstract":"<div><div>Although Sn-based perovskite solar cells (PSC) have impressive conversion efficiency, their stability needs to be improved. Herein, 3,4,5-trifluorophenol (C<sub>6</sub>H<sub>3</sub>F<sub>3</sub>O) containing –F and –OH groups was introduced to improve the film stability and quality of FA<sub>0.75</sub>MA<sub>0.25</sub>SnI<sub>3</sub>. –F groups with low surface energy cause C<sub>6</sub>H<sub>3</sub>F<sub>3</sub>O to spontaneously migrate to the air-solution interface and attract the SnI<sub>6</sub><sup>4−</sup> octahedron to the solution-air surface through hydrogen bond interactions between –OH and I. This leads to preferential nucleation of dense, high-quality perovskite films at the solution-air surface and orderly growth from top to bottom. Additionally, C<sub>6</sub>H<sub>3</sub>F<sub>3</sub>O is bonded to the surface of the film, and the outward-facing hydrophobic –F groups effectively shield FA<sub>0.75</sub>MA<sub>0.25</sub>SnI<sub>3</sub> from water infiltration. The C<sub>6</sub>H<sub>3</sub>F<sub>3</sub>O-doped PSC exhibited a champion efficiency of 10.47 % and long-term stability of over 1000 h, retaining 80 % of its initial efficiency (in N<sub>2</sub>).</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137667"},"PeriodicalIF":2.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656528","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
Synergistic effects of SMA fibers and fly ash on the material characterization of recycled aggregate concrete SMA 纤维和粉煤灰对再生骨料混凝土材料特性的协同效应
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-05 DOI: 10.1016/j.matlet.2024.137670
Nejib Ghazouani , Ali Raza , Ahmed Babeker Elhag
{"title":"Synergistic effects of SMA fibers and fly ash on the material characterization of recycled aggregate concrete","authors":"Nejib Ghazouani ,&nbsp;Ali Raza ,&nbsp;Ahmed Babeker Elhag","doi":"10.1016/j.matlet.2024.137670","DOIUrl":"10.1016/j.matlet.2024.137670","url":null,"abstract":"<div><div>This study focuses on improving the material characterization of Recycled Aggregate Concrete (RAC) while minimizing its environmental impact. It explores the interaction between Shape Memory Alloy (SMA) fibers and fly ash (FA) in RAC. Comprehensive microstructural and mineralogical analyses were conducted using Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD), along with thermal assessments via Thermogravimetric Analysis (TGA) and Differential Thermogravimetry (DTG). SEM images consistently revealed hydration products, including calcium hydroxide and ettringite, across all specimens. The results indicate that incorporating SMA fibers significantly enhances FA-containing RAC by improving mechanical strength, thermal regulation, matrix densification, and crack control, effectively addressing the inherent weaknesses of recycled aggregates.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137670"},"PeriodicalIF":2.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656525","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
SiC-induced modification of MnCo2O4 nanoneedles fabricated on Ni foam for binder-free electrodes in high-performance asymmetrical supercapacitors 在镍泡沫上制造的 MnCo2O4 纳米针的碳化硅诱导改性，用于高性能非对称超级电容器中的无粘结剂电极
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-05 DOI: 10.1016/j.matlet.2024.137665
Dajun Wu , Panyi Wu , Zhengpeng Xia , Xuekun Hong , Bin Qian , Paul K. Chu
{"title":"SiC-induced modification of MnCo2O4 nanoneedles fabricated on Ni foam for binder-free electrodes in high-performance asymmetrical supercapacitors","authors":"Dajun Wu ,&nbsp;Panyi Wu ,&nbsp;Zhengpeng Xia ,&nbsp;Xuekun Hong ,&nbsp;Bin Qian ,&nbsp;Paul K. Chu","doi":"10.1016/j.matlet.2024.137665","DOIUrl":"10.1016/j.matlet.2024.137665","url":null,"abstract":"<div><div>Supercapacitors with large energy densities are required for commercial applications. Herein, the urchin-like and hexagonal MnCo<sub>2</sub>O<sub>4</sub>/SiC composite is prepared <em>in situ</em> on Ni foam. The urchin-like MnCo<sub>2</sub>O<sub>4</sub>/SiC consists of nanoneedle clusters with a length of about 10 μm and a diameter of 20 nm. The MnCo<sub>2</sub>O<sub>4</sub>/SiC||AC asymmetrical supercapacitor (ASCs) shows an energy density of 90.3 Wh/kg (1.73F cm<sup>−2</sup>) at a power density of 1.25 kW/kg together with 92.1 % retention of the specific capacitance after 10,000 cycles. The results reveal excellent properties and large commercial potential.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137665"},"PeriodicalIF":2.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592916","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
Exploring popped-out phenomena in large-scale silicon ingot growth 探索大规模硅锭生长过程中的爆裂现象
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-05 DOI: 10.1016/j.matlet.2024.137666
Zary Adabavazeh
{"title":"Exploring popped-out phenomena in large-scale silicon ingot growth","authors":"Zary Adabavazeh","doi":"10.1016/j.matlet.2024.137666","DOIUrl":"10.1016/j.matlet.2024.137666","url":null,"abstract":"<div><div>Silicon wafers are essential for the semiconductor industry, providing the foundation for most integrated circuits. As demand for microelectronics grows, larger silicon wafers, have become crucial for increasing chip production and reducing manufacturing costs. However, the crystal separation phase during Czochralski (CZ) ingot growth is particularly challenging for larger ingots, often resulting in defects due to premature detachment (“popped-out” tails). This study investigates the popping-out stage of 18-inch ingots under varying heater power and ingot pull-out speed conditions. Photoluminescence (PL) imaging and a convolutional neural network (CNN) were used to analyze dislocation density in the silicon wafers. Results show that increasing the pull-out speed after detachment can significantly increase dislocation density, while pausing the ingot near the melt surface minimizes dislocations. Additionally, increasing heater power after detachment reduces dislocation density. The optimal condition for minimizing dislocation was found when heater power was doubled, and the ingot was paused near the melt surface for 30 min.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137666"},"PeriodicalIF":2.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656518","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
Synthesis and characterization of the RE2A2O7 oxides with an ultrahigh-entropy sublattice occupied by rare-earth elements 具有被稀土元素占据的超高熵子晶格的 RE2A2O7 氧化物的合成与表征
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-05 DOI: 10.1016/j.matlet.2024.137668
Evgeny Trofimov , Ahmad Ostovari Moghaddam , Ksenia Litvinyuk , Mariappan Anandkumar , Milena Efimova , Dmitry Mikhailov , Olga Zaitseva
{"title":"Synthesis and characterization of the RE2A2O7 oxides with an ultrahigh-entropy sublattice occupied by rare-earth elements","authors":"Evgeny Trofimov ,&nbsp;Ahmad Ostovari Moghaddam ,&nbsp;Ksenia Litvinyuk ,&nbsp;Mariappan Anandkumar ,&nbsp;Milena Efimova ,&nbsp;Dmitry Mikhailov ,&nbsp;Olga Zaitseva","doi":"10.1016/j.matlet.2024.137668","DOIUrl":"10.1016/j.matlet.2024.137668","url":null,"abstract":"<div><div>The possibility of fabricating novel high-entropy oxides (HEOs) with one ultrahigh-entropy sublattice consisting of 13 cations in RE<sub>2</sub>A<sub>2</sub>O<sub>7</sub> (RE = [La, Sm, Nd, Gd, Dy, Yb, Y, Er, Eu, Tb, Ho, Lu, Tm], A = Zr, Hf, Ti, Sn, Ce or Pr) is demonstrated. All the samples exhibited a pure pyrochlore-type or defective fluorite crystalline structure with various degrees of cation disordering. Particularly, RE<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> and RE<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> exhibited a pure pyrochlore-type structure with high degree of ordering, while RE<sub>2</sub>Ce<sub>2</sub>O<sub>7</sub> and RE<sub>2</sub>Pr<sub>2</sub>O<sub>7</sub> demonstrated a single fluorite type HEO structure. The results pave the way to fabricate RE<sub>2</sub>A<sub>2</sub>O<sub>7</sub> HEOs with an ultrahigh-entropy sublattice and potential application as the ceramic layer in thermal barrier coatings.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137668"},"PeriodicalIF":2.7,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656523","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
NiMo/NiFe-LDH heterostructured electrocatalyst for hydrogen production from water electrolysis 用于电解水制氢的 NiMo/NiFe-LDH 异质结构电催化剂
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-04 DOI: 10.1016/j.matlet.2024.137664
Cong Hong , Jihao Ji , Jingguang Huang , Yuanning Zhang , Liangkai Li
{"title":"NiMo/NiFe-LDH heterostructured electrocatalyst for hydrogen production from water electrolysis","authors":"Cong Hong ,&nbsp;Jihao Ji ,&nbsp;Jingguang Huang ,&nbsp;Yuanning Zhang ,&nbsp;Liangkai Li","doi":"10.1016/j.matlet.2024.137664","DOIUrl":"10.1016/j.matlet.2024.137664","url":null,"abstract":"<div><div>Constructing low-cost and efficient catalysts for electrocatalytic water splitting to produce hydrogen is of great significance. In this study, we successfully prepared NiMo/NiFe-LDH electrocatalysts with abundant coupled interfaces using a hydrothermal method and electrodeposition. The synergistic effect between the NiMo alloy and NiFe-LDH nanosheets induces charge redistribution at the interface and accelerates charge transfer, thus improving reaction kinetics and enhancing electrocatalytic performance. Experimental results show that at a current density of 10 mA cm<sup>−2</sup>, the HER overpotential of NiMo/NiFe-LDH is 35 mV, demonstrating excellent water-splitting performance. This work provides insights into the development of alloy/transition metal hydroxides for efficient water-splitting hydrogen production.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137664"},"PeriodicalIF":2.7,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656617","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
Strategies for designing high-performance hard carbon anodes with enhanced lithium-ion diffusion and rate capability 设计具有更强锂离子扩散和速率能力的高性能硬碳阳极的策略
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2024-11-04 DOI: 10.1016/j.matlet.2024.137663
Fuliang Liu , Xiaoshuang Luo , Xiong Zhou , Yin Shen , Junchen Chen , Xing Li , Xiaogang Zhang
{"title":"Strategies for designing high-performance hard carbon anodes with enhanced lithium-ion diffusion and rate capability","authors":"Fuliang Liu ,&nbsp;Xiaoshuang Luo ,&nbsp;Xiong Zhou ,&nbsp;Yin Shen ,&nbsp;Junchen Chen ,&nbsp;Xing Li ,&nbsp;Xiaogang Zhang","doi":"10.1016/j.matlet.2024.137663","DOIUrl":"10.1016/j.matlet.2024.137663","url":null,"abstract":"<div><div>The performance of the electrodes is closely related to the structure of the electrode sheet, and the construction of advanced electrodes is crucial for the lithium-ion diffusion process in high-performance lithium-ion batteries (LIBs). Hard carbon, with its irregular polycrystalline microstructure, is an ideal candidate material for the anode electrode of LIBs. However, its have some drawbacks such as low initial coulombic efficiency (ICE), low capacity and poor rate performance. In this work, two electrode casting approaches are proposed and tested in pouch cells, which are double-layer blade coated electrode and patterned coated electrode. The results show that both coating methods show a combination of high ICE and rate capability, exceeding the performance of conventional single-coated electrodes composed of the same material. The designed coating method improves the dynamics of lithium ion diffusion process in the electrode, and the magnification performance and comprehensive electrochemical performance are improved. The research has a wide application prospect and can provide design guidance for obtaining high-power batteries.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"379 ","pages":"Article 137663"},"PeriodicalIF":2.7,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592918","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
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