Bulletin of Materials Science最新文献

{"title":"Effects of additive and sintering temperatures on solution-combustion Zn3V2O8 green phosphor","authors":"Moges Tsega","doi":"10.1007/s12034-024-03386-y","DOIUrl":"10.1007/s12034-024-03386-y","url":null,"abstract":"<div><p>Zn₃V₂O₈ (or ZVO) nanophosphor was prepared using a simple solution-combustion technique and sintered at 700–800°C for 5 h. The effects of additive and sintering temperatures on structural, morphological and optical properties have been investigated. The structural studies revealed an orthorhombic phase structure. The <i>d</i>-spacing and lattice constants also increased with the sintering temperature. The microplate-shaped morphology of ZVO sintered at 750°C is confirmed by SEM and TEM pictures, with an average grain size of roughly 3–5 μm. The optical energy gap of the direct transition is also estimated, and it decreases from 3.4 to 3.1 eV with the increase in sintering temperature. The ZVO also demonstrated a broad photoluminescence (PL) emission range between 450 and 600 nm, with a peak at 534 nm, indicating green luminescent emission. Large grains with microplate shapes emit the highest PL intensity in ZVO phosphor at 750°C.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107985","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}

{"title":"Design, fabrication and validation of a low-cost stereotaxic device for brain research in rodents","authors":"Avinash Wadkar,&nbsp;Heramb Patkar,&nbsp;Srinivasa Prasad Kommajosyula","doi":"10.1007/s12034-024-03377-z","DOIUrl":"10.1007/s12034-024-03377-z","url":null,"abstract":"<div><p>Environmental toxicants can impact brain health and function. Studying their effects on the rodent brain is paramount to understanding the mechanisms and devising therapies. The stereotaxic device is widely used to target brain regions. However, the cost of this device is very high and cannot be afforded by researchers from low- and low-middle-income countries. This study has modelled, designed, fabricated, and evaluated a cost-effective stereotaxic device. A 3-D model of the stereotaxic device was prepared using FUSION 360 software followed by fabrication using aluminium and steel. The aluminium has malleability, lightweight, high extrudability, and corrosion resistance property, making it the material of choice for fabricating the nose clamp, mouth restrainer, and ear bar. To construct the parts requiring motion, we used alloy steel, which has high density, tensile strength and smooth texture. To achieve better accuracy, computer numerical control (CNC) and an automatic wire-cutting (EDM) manufacturing processes were used in fabrication. Later, the dye microinjection and electrolytic lesion techniques were used to validate this instrument. A comparison of percent accuracy for hitting structures between the fabricated and commercial stereotaxic devices for both the deep and superficial brain structures such as the substantia nigra (91.7 <i>vs.</i> 92.5%), thalamus (92.6 <i>vs.</i> 98.22%) and hippocampus (92.85 <i>vs.</i> 98.75%), showcased comparable accuracies between devices. The cost of the materials used were approximately nine thousand Indian rupees, and the labour charges for different machining processes used were approximately seventeen thousand Indian rupees. Totalling to 26,000 Indian rupees or 310 US dollars. This cost may vary depending on the material type/vendor as well. The materials can be provided to a workshop, and the design reported here can be used to make a stereotaxic device for rodent research. The 3-D modeling approach presented here coupled with computerised numerical control/electronic discharge machining process achieves high precision comparable to a commercial product and is also affordable. This study will enable students/researchers in middle and low-income countries to perform neuroscience/toxicological studies on the brain using this self-made low-cost precision device.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107974","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}

{"title":"Ab initio calculations of DNA/RNA nucleobases with blue/black phosphorene for electronic sensing applications","authors":"Bahadir Salmankurt,&nbsp;Hikmet Hakan Gürel","doi":"10.1007/s12034-024-03384-0","DOIUrl":"10.1007/s12034-024-03384-0","url":null,"abstract":"<div><p>Nucleobases (NBs), essential biomolecules underpinning numerous biological processes, were investigated for their adsorption mechanisms on black phosphorene (BlackP) and blue phosphorene (BlueP) monolayers using first-principles van der Waals (vdW) calculations. The study examined guanine (G), cytosine (C), adenine (A), thymine (T), and uracil (U) as adsorbates. The adsorption strength between DNA/RNA nucleobases and BlackP followed the trend G &gt; A &gt; C &gt; T &gt; U. At the same time, BlueP exhibited G &gt; C &gt; A &gt; T &gt; U. It aligns with theoretical studies in the literature on the interaction between BlueP/BlackP and NBs. Furthermore, the influence of these interactions on the electronic properties was uniquely investigated in detail. The most notable result obtained is the significant change in the band structures of BlueP upon interaction with G and A. Furthermore, this study uniquely investigates the adsorption mechanisms of NBs on BlackP and BlueP under the effect of charging by focussing on the impact on electronic properties for the first time. The results suggest a potential semiconductor-metal-semiconductor (SMS) transition for NBs on BlueP under charging. Compared to other NBs, A has a distinct influence on BlueP at the state of ΣQ = + 2 e/cell. Also, the effects of NBs on the transport properties of BlackP/BlueP monolayers have been investigated in detail for the first time. At a gate voltage (Vg) of 0.30 V, the BlackP sensor demonstrates improved sensitivity towards C, G, and U. Therefore, this study provides insights for developing the devices detecting the NBs.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109434","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}

{"title":"Influence of sintering temperature on microstructure and electrical properties of titanium porous-transport layers for proton exchange membrane water electrolyzer applications","authors":"Doan Dinh Phuong,&nbsp;Do Chi Linh,&nbsp;Pham Hong Hanh,&nbsp;Nguyen Quoc Thinh,&nbsp;Luong Van Duong","doi":"10.1007/s12034-024-03391-1","DOIUrl":"10.1007/s12034-024-03391-1","url":null,"abstract":"<div><p>Porous transport layers (PTL) are used in the proton exchange membrane water electrolyzers to facilitate the gas/water transport and the electric charge transfer. As a result, the PTL is critical in ensuring the efficiency of the electrolyzing process. This work aims to produce titanium PTLs through the spark plasma sintering process. The sintering temperature was varied from 500 to 650°C to investigate the characteristics of the titanium PTL samples while maintaining the sintering pressure and holding time at 10 MPa and 10 min, respectively. The phase structure and morphology of the samples were investigated by X-ray diffraction and scanning electron microscopy analyses. The compressive strength and the corrosion behaviour of the samples were investigated by the compressive testing and the electrochemical corrosion testing, respectively. The experimental results showed that there were no new phases formed when the Ti PTLs were sintered at different temperatures. With an increase in the sintering temperature, the porosity of the samples considerably decreased, while their compressive strength, electrical conductivity and corrosion resistance increased. It is suggested that selecting the optimum sintering temperature for sintered samples can improve the mass transport behaviour in PEM electrolyzers and produce superior PTLs.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109576","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}

{"title":"Catanionic synergetic effect of sodium dodecyl sulphate and cetyl trimethyl ammonium bromide surfactants on the electrochemical performance of porous carbon anodes in lithium-ion batteries","authors":"Y Guner,&nbsp;K B Dermenci,&nbsp;A T Guner,&nbsp;S Turan","doi":"10.1007/s12034-024-03393-z","DOIUrl":"10.1007/s12034-024-03393-z","url":null,"abstract":"<div><p>Carbon-derived materials are suitable for use as anodes in lithium-ion batteries due to low production cost and abundance. However, there is a need to improve the electrochemical performance with various modifications due to the limited capacity. In this study, a porous carbon is modified with anionic sodium dodecyl sulphate (SDS) and cationic cetyl trimethyl ammonium bromide (CTAB) surfactants and prepared as an anode for use in lithium-ion batteries. Morphological and structural properties change with the addition of surfactants, and the use of only one or two of them together has different effects. The morphology formed by adding only SDS is homogeneous and only CTAB is heterogeneous. When both surfactants are used SDS also provides homogeneous dispersion of CTAB. The changes in <i>I</i>_2D/<i>I</i>_G and <i>I</i>_D/<i>I</i>_G ratios obtained from Raman analyses show that the layer arrangement and the ratio of defects in the structure have changed. Electrochemical performances with different surfactant amounts are compared by using charge/discharge tests, cyclic voltammetric tests and differential capacity analysis (d<i>Q</i>/d<i>V</i>). The combined use of SDS and CTAB creates a synergetic effect (catanionic) and increases the capacity nearly 1.5 times by improving wetting, amount of lithium-ion storage areas and reducing the irreversible loss of capacity caused by solid electrolyte interface.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109575","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}

{"title":"Impedance and modulus spectroscopy of thermally synthesised ZnFe2O4 prepared through the mediation of different polymers","authors":"Harsha Chouhan,&nbsp;Sushil Kumar Behera,&nbsp;Maheswar Panda","doi":"10.1007/s12034-024-03374-2","DOIUrl":"10.1007/s12034-024-03374-2","url":null,"abstract":"<div><p>ZnFe₂O₄ was thermally synthesised through the mediation of different polymers such as Poly(vinyl alcohol), Poly(vinyl pyrrolidone) and Poly(ethylene glycol) to prevent the unwanted agglomeration. The Rietveld refinement of the XRD spectra confirmed the sample to be fcc, while the FESEM/TEM micrographs exhibited the formation of spherical nanoparticles. The TGA/DSC analysis confirmed that the sample is stable up to 500°C. The dielectric, impedance and modulus spectroscopy as a function of temperature up to 200°C and within the frequency range of 20 Hz to 2 MHz confirm a single non-Debye type relaxation behaviour at different temperatures (well fitted by the KWW (Kohlrausch–Williams–Watts) function) attributed to the grain boundary/MWS polarisation present in the samples. The modulus and impedance master curve confirmed the distribution of relaxation times being independent of temperature. The AC conductivity phenomenon is explained using the CBH (correlated barrier hopping) model, satisfying Jonscher's universal power law with exponents in the range of [0,1] with an activation energy in the range of 0.4–0.8 eV. The obtained optical spectra of the samples with the help of UV-visible/PL spectra evaluate the direct energy band gap to be from 1.7 eV to 2.8 eV and these ferrites may be suitable for high-frequency as well as for optoelectronic applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109643","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}

{"title":"Optimization of spark plasma sintered parameters of Al–SiC–kaolin hybrid composite using Taguchi–grey relational analysis","authors":"V S S Venkatesh,&nbsp;Prabhakara Rao Ganji,&nbsp;Sunil Kumar,&nbsp;Lokeswar Patnaik","doi":"10.1007/s12034-024-03378-y","DOIUrl":"10.1007/s12034-024-03378-y","url":null,"abstract":"<div><p>This study investigates the effects of sintering parameters on the mechanical properties and microstructure of spark plasma sintered aluminium hybrid composites reinforced with 10 wt% SiC and 4 wt% kaolin. Using Taguchi–grey relational analysis (TGRA), the sintering temperature, compaction time, and compaction pressure were optimized based on their influence on density, ultimate tensile strength (UTS), and compression strength. Experiments were designed using an L₉ orthogonal array, and ANOVA analysis was performed to determine the percentage contribution of each parameter. The optimal sintering conditions were found to be at a temperature of 570°C, a compaction time of 5 min, and a pressure of 20 MPa, resulting in a maximum density of 2.72 g/cc, UTS of 313 MPa, and compression strength of 379 MPa. Microstructural analysis through SEM revealed a homogeneous distribution of reinforcements at the optimal conditions, while the presence of Al₂Cu intermetallic compounds was detected near the grain boundaries at non-optimal conditions. These results confirm that optimized sintering parameters significantly enhance the mechanical properties of the composite.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109205","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}

{"title":"Immobilization and solid reaction of adsorbed metal ions using heat treatment of synthesized Na-P1 type zeolite from coal fly ash","authors":"Hiromichi Aono,&nbsp;Ami Takahashi,&nbsp;Takumi Miyamoto,&nbsp;Yoshiteru Itagaki","doi":"10.1007/s12034-024-03371-5","DOIUrl":"10.1007/s12034-024-03371-5","url":null,"abstract":"<div><p>The Na-P1 type zeolites were synthesized using coal fly ash (FA-Na-P1) and also using chemical reagents (CA-Na-P1) for comparison. Both Na-P1 type zeolites showed a superior adsorption ability for the non-radioactive metal ions of Cs, Sr, Mn, Zn, Co, or Fe, assuming radioisotopes with relatively long half-lives. These zeolites were heat-treated for the immobilization of the adsorbed metal ions in the decomposed zeolite. The elution ratio of the metal ions in the deionized water and seawater for 14 days showed a low elution when the sample was heated at 1000°C and higher temperature for both zeolites. In particular, the elution of the 1100°C heated sample for the zeolite from fly ash significantly decreased compared with that from the chemical reagents. The reaction between the adsorbed cation and zeolite was confirmed to form polymetallic oxide. The formation of the reacted oxide phase suppressed the elution ratio for the FA-Na-P1 zeolite.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941277","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}

{"title":"Performance evaluation of transition metal dichalcogenide-based perovskite solar cells","authors":"Shikha Marwaha","doi":"10.1007/s12034-024-03360-8","DOIUrl":"10.1007/s12034-024-03360-8","url":null,"abstract":"<div><p>In this work, a comprehensive analysis was performed on the perovskite solar cells (PSCs) considering MoS₂ as the electron transport layer. For the initial calculations, numerical simulations obtained through SCAPS-1D were matched with experimental results. Further, multi-faceted exploration of material parameters was performed to obtain better performing PSC device. Electron affinity values of MoS₂ layer were varied to obtain an optimum value to quantify its n-type behaviour. Furthermore, the impact of charge density and thickness of MoS₂, Spiro-OMeTAD, thickness of perovskite layer, interface engineering of perovskite/charge transport layers and temperature were investigated in detail. Incorporation of optimized parameters has resulted in an improved device with <i>J</i>_sc, <i>V</i>_oc, FF and <i>η</i> values as 23.7 mA cm⁻², 1.15 V, 83.04 and 22.76%, respectively. To ensure higher stability, MoTe₂ and WSe₂ as hole transport layers were also investigated in this work. The obtained results point to the applicability of these HTLs as an optimum replacement for the commonly employed transport layers. Analysis conducted in this work provides a pathway to explore prospective options for improving the efficiency and sustainability of PSCs for commercial applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941278","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}

{"title":"Tuning the structural, magnetic and optical properties of EuCrO3 orthochromites through Dy3+ substitution","authors":"Meenakshi,&nbsp;R Kapoor,&nbsp;S Dash,&nbsp;R Bansal,&nbsp;A Vij,&nbsp;H K Chourasiya,&nbsp;N Kumar,&nbsp; Ramovatar,&nbsp;S Kumar","doi":"10.1007/s12034-024-03376-0","DOIUrl":"10.1007/s12034-024-03376-0","url":null,"abstract":"<div><p>In this study, EuCrO₃ (ECO) and Eu_0.9Dy_0.10CrO₃ (EDCO) rare-earth orthochromite compositions were synthesized through the traditional solid-state reaction technique. A comprehensive investigation was conducted to analyse the effect of the substitution of 10 wt% Dy³⁺ ions on the structural, optical and magnetic properties of EuCrO₃. The X-ray diffraction results along with Rietveld refinement confirm the monophasic nature with an orthorhombic distorted perovskite structure for both compositions. Field emission scanning electron microscopy reveals polycrystalline microstructures with average grain sizes ranging from 269 to 327 nm for both compounds. The optical bandgap is evaluated by Tauc’s relation and is observed to slightly increase from 2.24 to 2.33 eV with Dy³⁺ ions substitution. Optical parameters, including skin depth, extinction coefficient, refractive index and optical conductivity are determined and their variations with Dy substitution are analysed. Temperature-dependent magnetic analysis reveals a Néel temperature (<i>T</i>_N) of 177 K in EDCO composition, lower than that of pristine EuCrO₃ (<i>T</i>_N ~181 K). The magnetocaloric effect of the EDCO compound demonstrates a magnetic entropy change (Δ<i>S</i>) and relative cooling power of –0.27 J kg⁻¹ K and 4.4 J kg⁻¹, respectively, near <i>T</i>_N under the application of 7 Tesla field. This study highlights the tunability of EuCrO₃ properties through Dy ion substitution for customized applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941281","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}