Materials Letters: X最新文献_第8页

Spectral analysis of ultrasonic signals backscartted by mortar: Effect of sand size and temperatures 砂浆后向散射超声信号的频谱分析：砂粒尺寸和温度的影响

IF 1.7

Materials Letters: X Pub Date : 2022-09-01 DOI: 10.1016/j.mlblux.2022.100158

Hicham LOTFI , Bouazza FAIZ , Hicham MESBAH , Hicham BANOUNI

{"title":"Spectral analysis of ultrasonic signals backscartted by mortar: Effect of sand size and temperatures","authors":"Hicham LOTFI , Bouazza FAIZ , Hicham MESBAH , Hicham BANOUNI","doi":"10.1016/j.mlblux.2022.100158","DOIUrl":"10.1016/j.mlblux.2022.100158","url":null,"abstract":"<div>This paper presents results of application of Ultrasonic Waves UW in civil engineering. The measurement has been performed by ultrasonic reflection technique using a transducer with central frequency 0,5MHz. Several methods of analysis and signal processing have been applied to detect the position of reflections and to measure the time of flight between two echoes related to the reflection at the mortar interfaces. The experiments performed in the laboratory are carried to determine the ultrasonic velocity of the wave backscattered by samples. This allowed determining the ultrasonic velocity of UW in the mortar in order to deduce the durability of each mortar according to its microstructure. The objective is to make a comparative study of the various methods of analysis of the ultrasonic signals as: Continuous Wavelet Transform (CWT), Wigner Ville (WVD), Pseudo Wigner–Ville distribution (PWVD), Smoothed Pseudo Wigner–Ville Distribution (SPWVD) and Hilbert Transform (HT).</div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"15 ","pages":"Article 100158"},"PeriodicalIF":1.7,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000382/pdfft?md5=d95929945ea9d7d8ede790f6caa484c2&pid=1-s2.0-S2590150822000382-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48661276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hydrothermal synthesis of rGO-MnO2 nanocomposite: Characterization and in vitro biological evaluation rGO-MnO2纳米复合材料的水热合成及其体外生物学评价

IF 1.7

Materials Letters: X Pub Date : 2022-09-01 DOI: 10.1016/j.mlblux.2022.100162

B. Usharani, V. Manivannan

引用次数: 2

Effect of cation concentration on structural, morphology, optical properties of Zinc-Nickel ferrite nanoparticles 阳离子浓度对锌-镍铁氧体纳米颗粒结构、形貌和光学性能的影响

IF 1.7

Materials Letters: X Pub Date : 2022-09-01 DOI: 10.1016/j.mlblux.2022.100156

R. Thejas , T.L. Soundarya , G. Nagaraju , K. Swaroop , S.C. Prashantha , M. Veena , E. Melagiriyappa , C.S. Naveen

引用次数: 4

Electro co-deposition of copper-silver nanocrystallite alloy cluster: A way for tunable SERS substrate development 电共沉积铜-银纳米晶合金簇：一种可调谐SERS衬底的开发方法

IF 1.7

Materials Letters: X Pub Date : 2022-09-01 DOI: 10.1016/j.mlblux.2022.100157

Balakrishnan Rajashekhar , Gaurav Pandey , Ramachandran Sekar , Murugan Veerapandian

引用次数: 1

Advanced remote laser cutting of battery foils using an interference approach 采用干涉方法的先进远程激光切割电池箔

IF 1.7

Materials Letters: X Pub Date : 2022-06-01 DOI: 10.1016/j.mlblux.2022.100138

Robert Baumann , Sabri Alamri , Alfredo I. Aguilar-Morales , Andrés F. Lasagni , Tim Kunze

{"title":"Advanced remote laser cutting of battery foils using an interference approach","authors":"Robert Baumann , Sabri Alamri , Alfredo I. Aguilar-Morales , Andrés F. Lasagni , Tim Kunze","doi":"10.1016/j.mlblux.2022.100138","DOIUrl":"10.1016/j.mlblux.2022.100138","url":null,"abstract":"<div>This work demonstrates how an interference pattern can improve the performance of remote laser cutting of pure copper foils, making the cutting process effective even for a low power laser source. The proof of concept is carried out by using a nanosecond laser source with a pulse duration of 5 ns, coupled with a two-beam scanning interference setup, producing a spatial period of 12.5 µm. In the experiments, processing parameters as pulse-to-pulse distance, laser power and scanning speed are varied, to optimize the foil breakthrough and their effect on the generated material modifications are investigated. A comparison between the processing results employing the interference pattern and single beam with a Gaussian energy distribution is carried out. While the single beam process is not sufficient for cutting a 10 µm thin metallic foil, the interference treatment shows an improvement over 100%. In addition, only small spatter formations are detected, with average particle sizes of 1.75 ± 0.82 µm on the top side of the foil. The bottom side of a fully separated copper foil only depicts small spatter formations of less than 1 µm.</div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"14 ","pages":"Article 100138"},"PeriodicalIF":1.7,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000187/pdfft?md5=1d455bfadd672e027637773d9fcb09ca&pid=1-s2.0-S2590150822000187-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48348803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A microscopy study of nanoparticles emitted during laser additive manufacturing with stainless steel powder 不锈钢粉末激光增材制造过程中纳米粒子发射的显微研究

IF 1.7

Materials Letters: X Pub Date : 2022-06-01 DOI: 10.1016/j.mlblux.2022.100139

Aleksey Noskov , Mikhael El-Khoury , Sergey Drobyshev , Evgeny Kuchaev , Fatih Yanbaev , Olga Zhigalina , Dmitriy Khmelenin , Albert Gilmutdinov

引用次数: 1

A novel asymmetric structured nanocomposite PEO-Cloisite based membrane for salt and dye separation 一种新型不对称结构纳米复合PEO-Cloisite盐染料分离膜

IF 1.7

Materials Letters: X Pub Date : 2022-06-01 DOI: 10.1016/j.mlblux.2022.100141

S. Sujithra, G. Arthanareeswaran

{"title":"A novel asymmetric structured nanocomposite PEO-Cloisite based membrane for salt and dye separation","authors":"S. Sujithra, G. Arthanareeswaran","doi":"10.1016/j.mlblux.2022.100141","DOIUrl":"https://doi.org/10.1016/j.mlblux.2022.100141","url":null,"abstract":"<div>In this study a novel approach was adopted to couple cloisite functionalised with PEO nanoparticles to modify the polyether sulfone (PES) at low pressure nanofiltration membrane for the removal of salts and dyes from waste water. PES/f-(PEO-Cloisite) nanocomposite membranes were fabricated by phase inversion process in presence of DMF as solvent. The functionalised PEO-Cloisite mixture was characterised by SEM-EDX and the membranes were characterised by hydrophilicity and morphology. The highest water flux of 152.77 Lm−2h−1 was observed for 4.5 wt% of PEO-Cloisite in PES membrane. Contact angle values reduced from 74.3° to 60.9° with the increase in the concentration of PEO-Cloisite and confirmed the increase of hydrophilicity. The membrane performance was tested using model saline and dye solutions by low pressure nanofiltration under longer run mode. This study infers that modification of PES membranes using functionalised PEO-Cloisite increase the membrane stability can be used to alleviate the fouling in the treatment of industrial waste water.</div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"14 ","pages":"Article 100141"},"PeriodicalIF":1.7,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000217/pdfft?md5=609739a2ce7e022521662e1b52c3cdd7&pid=1-s2.0-S2590150822000217-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72118549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flow stress improvement of a nickel multicrystal by physical vapor thin film deposition to reduce surface effects 通过物理气相薄膜沉积改善镍多晶体的流动应力以减少表面效应

IF 1.7

Materials Letters: X Pub Date : 2022-06-01 DOI: 10.1016/j.mlblux.2022.100145

Pierre-Antoine Dubos , Ameni Zaouali , Pierre-Yves Jouan , Mireille Richard-Plouet , Valerie Brien , David Gloaguen , Baptiste Girault

引用次数: 0

In situ synthesis and immobilization of CuO nanoparticles in alginate-poly(amido amine) nanogels for photocatalytic applications 原位合成CuO纳米颗粒并将其固定在藻酸盐-聚氨基胺纳米凝胶中用于光催化应用

IF 1.7

Materials Letters: X Pub Date : 2022-06-01 DOI: 10.1016/j.mlblux.2022.100148

A. Córdoba , B. Durán , S. Bonardd , D. Diaz Diaz , A. Leiva , C. Saldías

{"title":"In situ synthesis and immobilization of CuO nanoparticles in alginate-poly(amido amine) nanogels for photocatalytic applications","authors":"A. Córdoba , B. Durán , S. Bonardd , D. Diaz Diaz , A. Leiva , C. Saldías","doi":"10.1016/j.mlblux.2022.100148","DOIUrl":"10.1016/j.mlblux.2022.100148","url":null,"abstract":"<div>Herein, we report a feasible approach for preparation of crosslinked alginate (Alg) and poly(amido amine) (PAMAM) nanogels (Alg-PAMAM NGs), using a water-in-oil-in-water (w/o/w) double emulsion route, via strong electrostatic interactions between anionic groups coming from alginate and previously incorporated Cu2+ ions. CuO nanoparticles (NPs) with average diameter about 65 nm were in situ obtained into Alg/PAMAM nanogels by treatment of embedded Cu2+ ions in NGs with NaBH4 at 25 °C under air atmosphere. The prepared Alg-PAMAM and Alg-PAMAM-CuO NGs were characterized using FT-IR and UV–visible spectroscopy, as well as scanning transmission electron microscopy (STEM). The presence of PAMAM dendrimers helped both to obtain structurally compact nanogels and an adequate stabilization of CuO NPs. Finally, the photocatalytic performance of the Alg-PAMAM-CuO NGs was tested via the decomposition of methyl orange in aqueous solution, under visible light irradiation.</div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"14 ","pages":"Article 100148"},"PeriodicalIF":1.7,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259015082200028X/pdfft?md5=a83b8c4446c7c845f35c57ec764d3af9&pid=1-s2.0-S259015082200028X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45002990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Growth of indium-incorporated κ-Ga2O3 thin film lattice-matched to the ε-GaFeO3 substrate ε-GaFeO3衬底晶格匹配掺铟κ-Ga2O3薄膜的生长

IF 1.7

Materials Letters: X Pub Date : 2022-06-01 DOI: 10.1016/j.mlblux.2022.100149

Hiroyuki Nishinaka , Osamu Ueda , Noriaki Ikenaga , Noriyuki Hasuike , Masahiro Yoshimoto

{"title":"Growth of indium-incorporated κ-Ga2O3 thin film lattice-matched to the ε-GaFeO3 substrate","authors":"Hiroyuki Nishinaka , Osamu Ueda , Noriaki Ikenaga , Noriyuki Hasuike , Masahiro Yoshimoto","doi":"10.1016/j.mlblux.2022.100149","DOIUrl":"10.1016/j.mlblux.2022.100149","url":null,"abstract":"<div>Ga2O3 has attracted significant attention for various applications such as power-switching applications and deep-ultraviolet optoelectronics. In this study, we demonstrated a lattice-matching κ-(In1−xGax)2O3 thin film grown on an ε-GaFeO3 substrate via the mist chemical vapor deposition process. The X-ray diffraction peak of the thin film was almost coincident with that of the substrate and exhibited Laue oscillations. Atomic force microscopy revealed that the surface of the κ-(In1−xGax)2O3 thin film exhibited a step-terrace morphology and was atomically flat. The selected area electron diffraction of transmission electron microscopy showed that the diffraction spots of the thin film and substrate overlapped, indicating that the thin film was almost lattice-matched with the substrate. We believe that the lattice-matched κ-(In1−xGax)2O3 thin film with an ε-GaFeO3 substrate will contribute significantly to the demonstration of ferroelectric κ-Ga2O3 based high electron mobility transistors.</div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"14 ","pages":"Article 100149"},"PeriodicalIF":1.7,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000291/pdfft?md5=1554edeaa9c6a978bafb7723ca6c00e1&pid=1-s2.0-S2590150822000291-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45464494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1