Rozita M Moattari, Mostafa Mahinroosta, Seyed Nezameddin Ashrafizadeh
{"title":"Aluminomagnesium hydrogel as an efficient and reusable dye scavenger","authors":"Rozita M Moattari, Mostafa Mahinroosta, Seyed Nezameddin Ashrafizadeh","doi":"10.1016/j.mlblux.2022.100150","DOIUrl":"10.1016/j.mlblux.2022.100150","url":null,"abstract":"<div><p>In the present research work, an aluminomagnesium hydrogel was synthesized via co-precipitation, organic solvent-based aging, and microwave irradiation drying. The synthesized hydrogel was used to remove methylene blue dye from aqueous solutions. The adsorption experiments at room temperature indicated a removal efficiency of 99.7% under an adsorbent dosage of 4 g/L and a duration of 30 min. The adsorbent regeneration tests also confirmed the reusability of the adsorbent for the removal of dye, so that after five regeneration cycles, the hydrogel exhibited a removal efficiency of more than 90% under the same conditions. Overall, the results confirmed that the synthesized aluminomagnesium hydrogel could be used as a promising dye scavenger for methylene blue.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"15 ","pages":"Article 100150"},"PeriodicalIF":1.7,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000308/pdfft?md5=d1a411c6fa509d096f4158f9bd2a05f7&pid=1-s2.0-S2590150822000308-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45848950","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}
{"title":"Implementation of hybrid Ag nanorods embedded RGO-PDMS conductive material for flexible and dry electrocardiography sensor","authors":"Yogita Maithani, B.R. Mehta, J.P. Singh","doi":"10.1016/j.mlblux.2022.100152","DOIUrl":"10.1016/j.mlblux.2022.100152","url":null,"abstract":"<div><p>An efficient dry electrode is required to effectively record the biopotential signals. This study proposes a dry electrode for ECG monitoring based on highly flexible, conductive, and antibacterial silver nanorods (AgNRs) grown via a novel glancing angle deposition and RGO-PDMS composite matrix. The fabricated electrode possesses good electrical conductivity and skin contact impedance between 70.1 ± 0.7 kΩ to 5.6 ± 1.7 kΩ for frequencies ranging from 40 Hz to 1 kHz, comparable to conventional Ag/AgCl wet electrodes. These electrodes give excellent quality ECG signals and do not cause skin irritation even after several hours of usage. They offer high skin compatibility and good signal quality, which are prominent features for cardiorespiratory monitoring.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"15 ","pages":"Article 100152"},"PeriodicalIF":1.7,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000321/pdfft?md5=65c17c2251b978db8074a276eefffbec&pid=1-s2.0-S2590150822000321-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42923222","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}
{"title":"Structural and vibrational analysis of 2, 4-diamino-6-methyl-1, 3, 5-triazin-1-ium-hydrogen oxalate","authors":"N. Kanagathara , K. Ayisha Begam , M.K. Marchewka","doi":"10.1016/j.mlblux.2022.100163","DOIUrl":"10.1016/j.mlblux.2022.100163","url":null,"abstract":"<div><p>An organic crystalline salt − 2,4-Diamino-6-methyl-1,3,5-triazin- 1-ium hydrogen oxalate (DMTO) has hydrogen interactions viz. N<img>H⋯O, C<img>H⋯O, N<img>H⋯N and O<img>H⋯O gives interesting vibrational effect. X-ray diffraction study reveals that DMTO is crystallized in triclinic centrosymmetric space group <em>P</em>-1 as expected. Structural as well as the vibrational spectra have been discussed on the basis of density functional theory (DFT) using B3LYP hybrid functional with the basis set 6–311++G(d,p).<!--> <!-->Acidic proton of the oxalic acid (OA) is transferred to 2,4-diamino-6-methyl-1,3,5-triazine (DAMT) and giving rise to singly protonated 2,4-diamino-6-methyl-1,3,5-triazinium ion.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"15 ","pages":"Article 100163"},"PeriodicalIF":1.7,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000436/pdfft?md5=8db5f529fdc2298d17693d487f5b74e8&pid=1-s2.0-S2590150822000436-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49502675","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}
Pragnesh N. Dave , Ruksana Sirach , Shalini Chaturvedi , Riddhi Thakkar , M.P. Deshpande
{"title":"The catalytic effect of CoCuZnF on the thermal decomposition of 3-nitro-2,4-dihydro-1,2,4-triazol-5-one (NTO) and nanosize NTO","authors":"Pragnesh N. Dave , Ruksana Sirach , Shalini Chaturvedi , Riddhi Thakkar , M.P. Deshpande","doi":"10.1016/j.mlblux.2022.100159","DOIUrl":"10.1016/j.mlblux.2022.100159","url":null,"abstract":"<div><p>Cobalt-copper-zinc ferrite (CoCuZnF) nanoparticles were synthesized using the precipitation method. The characterization of CoCuZnF was carried out using powder XRD, Raman, IR, UV–vis, and FEG-SEM. The TG-DSC data of NTO, and nNTO containing the catalyst was used to study the thermal decomposition behavior. Three non-isothermal methods were used to evaluate the kinetic parameters. The kinetics data suggests that incorporation of CoCuZnF additive can effectively decrease the high activation energy of NTO by ∼83–88 kJ mol<sup>−1</sup> and nNTO (∼205–216 kJ mol<sup>−1</sup>). The decomposition of both NTO and nNTO was faster in the presence of CoCuZnF, suggesting its plausible use in the high explosive munitions containing NTO.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"15 ","pages":"Article 100159"},"PeriodicalIF":1.7,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000394/pdfft?md5=647bc6b5d085fcec880a7d9b7d39c2a2&pid=1-s2.0-S2590150822000394-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46662862","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}
{"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><p>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).</p></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}
{"title":"Hydrothermal synthesis of rGO-MnO2 nanocomposite: Characterization and in vitro biological evaluation","authors":"B. Usharani, V. Manivannan","doi":"10.1016/j.mlblux.2022.100162","DOIUrl":"10.1016/j.mlblux.2022.100162","url":null,"abstract":"<div><p>In today’s scenario, a number of nanocomposites are evidencing handy control in in vitro biological studies like anti-inflammatory and antidiabetic activity. Since the nanocomposite action and mechanism are totally different from others, like simple molecules<!--> <!-->of antibiotics. This work described a facile one-pot hydrothermal synthesis of the rGO-MnO<sub>2</sub> nanocomposite. The prepared samples were characterized and confirmed by XRD, UV, SEM, EDX, and XPS studies. Furthermore, the catalytic performance evolved through in vitro biological applications such as anti-inflammatory and antidiabetic activities. rGO-MnO<sub>2</sub> nanocomposite has more biological activity than pure MnO<sub>2</sub> nanoparticles, as demonstrated by the results.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"15 ","pages":"Article 100162"},"PeriodicalIF":1.7,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000424/pdfft?md5=bd7bf9b53a81b63908ee8a5c527c6abb&pid=1-s2.0-S2590150822000424-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49422386","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}
R. Thejas , T.L. Soundarya , G. Nagaraju , K. Swaroop , S.C. Prashantha , M. Veena , E. Melagiriyappa , C.S. Naveen
{"title":"Effect of cation concentration on structural, morphology, optical properties of Zinc-Nickel ferrite nanoparticles","authors":"R. Thejas , T.L. Soundarya , G. Nagaraju , K. Swaroop , S.C. Prashantha , M. Veena , E. Melagiriyappa , C.S. Naveen","doi":"10.1016/j.mlblux.2022.100156","DOIUrl":"10.1016/j.mlblux.2022.100156","url":null,"abstract":"<div><p>Zinc-Nickel Ferrite (Zn<sub>(1−x)</sub>Ni<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub>) nanoparticles were synthesized by solution combustion method using urea as a fuel and varying the cation concentration (x = 0, 0.2, 0.4, 0.6, 0.8, 1). The effects of cation concentration, on the crystallite size, morphology, absorption properties have been studied. The X-ray diffraction and FTIR results confirm the formation of single-phase spinel structure of Zinc-Nickel Ferrite nanoparticles. FESEM and TEM study reveals the formation of uniform spherical shape distribution of Zn<sub>(1−x)</sub>Ni<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> nanoparticles. The bandgap values were calculated for the prepared samples using UV–Visible spectrophotometer.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"15 ","pages":"Article 100156"},"PeriodicalIF":1.7,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000369/pdfft?md5=b98b733d1580b0371ee9d86e280cc0ca&pid=1-s2.0-S2590150822000369-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43388626","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}
{"title":"Electro co-deposition of copper-silver nanocrystallite alloy cluster: A way for tunable SERS substrate development","authors":"Balakrishnan Rajashekhar , Gaurav Pandey , Ramachandran Sekar , Murugan Veerapandian","doi":"10.1016/j.mlblux.2022.100157","DOIUrl":"10.1016/j.mlblux.2022.100157","url":null,"abstract":"<div><p>Surface-enhanced Raman spectroscopy (SERS) exhibits intriguing analytical application owing to their non-invasive method, specificity, and sensitivity. However, development of tunable SERS active substrate remains a challenge. Herein, we report a straightforward chronoamperometric co-deposition strategy, utilizing a reducing agent, to form bimetallic coating comprised of Cu/Ag on silica substrate, where alteration of deposition current endows fractional variations in the nucleation/growth of Cu<sup>2+</sup> → Cu<sup>+</sup>/Cu<sup>0</sup> and Ag<sup>2+</sup> → Ag<sup>+</sup>/Ag<sup>0</sup>. Properties of optical reflectance, surface chemistry, topography, and nanocrystallite cluster orientation were characterized. Experimental results confirm bimetallic coating with large proportion of Ag on Cu matrix could enable better SERS behavior with studied model, Rhodamine 6G.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"15 ","pages":"Article 100157"},"PeriodicalIF":1.7,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000370/pdfft?md5=bcb5f8d98b6bb73d0a8ee03ceed071e5&pid=1-s2.0-S2590150822000370-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43259389","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}
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><p>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.</p></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}
Aleksey Noskov , Mikhael El-Khoury , Sergey Drobyshev , Evgeny Kuchaev , Fatih Yanbaev , Olga Zhigalina , Dmitriy Khmelenin , Albert Gilmutdinov
{"title":"A microscopy study of nanoparticles emitted during laser additive manufacturing with stainless steel powder","authors":"Aleksey Noskov , Mikhael El-Khoury , Sergey Drobyshev , Evgeny Kuchaev , Fatih Yanbaev , Olga Zhigalina , Dmitriy Khmelenin , Albert Gilmutdinov","doi":"10.1016/j.mlblux.2022.100139","DOIUrl":"10.1016/j.mlblux.2022.100139","url":null,"abstract":"<div><p>This article considers the nanoparticles suspended in the gas phase in the vicinity of a 3D-printed surface during additive manufacturing via Laser Beam Powder Bed Fusion (LB-PBF) and Directed Energy Deposition (DED). The results of this research show that the primary pollutants during the laser additive manufacturing using metal powder are aggregated core–shell nanoparticles with an average particle size of about 10 nm. High-resolution microscopy shows the chemical composition of the volume and surface of each particle; in particular, the “core” consists of Fe, Cr, and Ni atoms and the “shell” is a thin oxide layer.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"14 ","pages":"Article 100139"},"PeriodicalIF":1.7,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150822000199/pdfft?md5=1d785ed58504e6821459af16d7363edb&pid=1-s2.0-S2590150822000199-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45131184","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}