Journal of Materials Science: Materials in Electronics最新文献_第3页

Preparation of nickel oxide nanostructure by hydrothermal method as H2S gas sensor

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-05 DOI: 10.1007/s10854-025-14601-9

Aparna A. Kulkarni, Sarika D. Shinde, Ganesh E. Patil, Pavan Hiremath, Nithesh Naik, Gotan H. Jain, Rajendra P. Patil

{"title":"Preparation of nickel oxide nanostructure by hydrothermal method as H2S gas sensor","authors":"Aparna A. Kulkarni, Sarika D. Shinde, Ganesh E. Patil, Pavan Hiremath, Nithesh Naik, Gotan H. Jain, Rajendra P. Patil","doi":"10.1007/s10854-025-14601-9","DOIUrl":"10.1007/s10854-025-14601-9","url":null,"abstract":"<div>Gas sensing is beneficial for controlling industrial and vehicle exhaust, house articles security, and environmental management. CO2, H2S, SO2, CO, H2, O2, and various gases are recognized by different tools. In the present research work, the undoped NiO nanoparticles were synthesized using a hydrothermal technique. The effect of heating time in a Teflon-lined autoclave on the structural, electrical, and gas sensing properties of NiO nanoparticles (NiO NPs) was investigated. The time taken for samples S1, S2, S3, and S4 are 12, 24, 36 and 48 h, respectively. The thick films of NiO were developed on a glass substrate using a screen-printing technique. The gas sensitivity using thick films was reported. The obtained NiO NPs were examined by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), and EDX. The gas response of NiO thick films was tested to recognize various air pollutants, including NO2, H2S, C2H5OH, NH3, and LPG. Among these selected gases, NiO films show the highest gas response at 250 °C for H2S to sample 4. The maximum sensitivity was recorded at 72.14% at 250 °C. The films also shows the fast response and recovery time.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Luminescent afterglow and storage behavior in Mg2+/Sr2+-doped C12A7: Tb3+ photo-stimulate phosphors 掺杂 Mg2+/Sr2+ 的 C12A7：Tb3+ 光刺激荧光粉的发光余辉和储存行为

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-05 DOI: 10.1007/s10854-025-14706-1

Shengnan Li, Jian Shu, Fumin Shang, Xiao Zhang, Yi Jiang, Yu Meng, Lan Yu, Lu Liu, Rongyun Jiang

{"title":"Luminescent afterglow and storage behavior in Mg2+/Sr2+-doped C12A7: Tb3+ photo-stimulate phosphors","authors":"Shengnan Li, Jian Shu, Fumin Shang, Xiao Zhang, Yi Jiang, Yu Meng, Lan Yu, Lu Liu, Rongyun Jiang","doi":"10.1007/s10854-025-14706-1","DOIUrl":"10.1007/s10854-025-14706-1","url":null,"abstract":"<div>A series of alkaline earth ions (Mg2+/Sr2+)-doped 12CaO·7Al2O3:Tb3+ (C12A7:Tb3+) photo-stimulated luminescence (PSL) phosphors were synthesized via a combustion method combined with heat treatment. XRD Rietveld refinement parameters confirmed that the cage structure undergoes distortion after doping with alkaline earth ions. Photoluminescence (PL) and lifetime spectra indicate that doping induces nanocage distortion in C12A7. PSL spectra demonstrate that this distortion can influence the traps in C12A7:Tb3+, Mg2+ (C12A7:Tb–Mg), C12A7:Tb3+ (C12A7:Tb), and C12A7:Tb3+, Sr2+ (C12A7:Tb–Sr) phosphors. Thermoluminescence (TL) curves reveal that after the incorporation of Mg2⁺ ions, the trap depth and distribution become shallower for trap 1 and deeper for trap 2. Additionally, the half-peak width of the TL peak (trap 1) increases with the radius of the alkaline earth ions (from 45.5 to 84 K). TL curves irradiated by X-rays show that the number of trapped electrons is related to the atomic number of the doped alkaline earth ions. TL spectra at different resting times confirm that the electron trapping process involves filling shallow traps first, followed by deep traps. This study demonstrates that alkaline earth ions (Mg2+/Sr2+)-doped C12A7:Tb3+ represents a promising doping strategy for multi-responsive smart platforms. It is hoped that this work will provide new insights and guidelines for the rational design and performance optimization of electron trap materials.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, polarization currents, dielectric constant, and stability of magnesium titanate-based ceramics

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-05 DOI: 10.1007/s10854-025-14673-7

Zouhir Boumous, Samira Boumous, Mamoun Fellah, Majeed Ali Habeeb, Samia Latréche, Souren Grigorian, Gamal A. El-Hiti

{"title":"Synthesis, polarization currents, dielectric constant, and stability of magnesium titanate-based ceramics","authors":"Zouhir Boumous, Samira Boumous, Mamoun Fellah, Majeed Ali Habeeb, Samia Latréche, Souren Grigorian, Gamal A. El-Hiti","doi":"10.1007/s10854-025-14673-7","DOIUrl":"10.1007/s10854-025-14673-7","url":null,"abstract":"<div>The synthesis of magnesium titanate (MgTiO₃)-based ceramics via high-temperature solid-state reactions between MgO and TiO₂ has unlocked a pathway to achieving desirable crystalline structures and exceptional dielectric properties. This study introduces an innovative approach by leveraging the electroluminescence current technique to measure polarization currents in MgTiO₃-based ceramics, offering a more precise and insightful analysis of their behavior. It further pioneers an investigation into how sample dimensions, particularly thickness and diameter, influence key dielectric properties such as capacitance, permittivity, insulation resistance, and losses under varying temperatures and voltages. Advanced characterization methods, including X-ray diffraction (XRD), were employed to unveil the phase composition and microstructure. At the same time, dielectric measurements demonstrated groundbreaking findings: capacitance decreases with increasing thickness, shifting from 22.86 pF for a 4.38 mm sample to 21.80 pF for a 3.21 mm sample. Remarkably, the dielectric constant, ranging from 16.2 to 17.1 across 0 to 140 °C, showed a clear dependence on film thickness. Furthermore, capacitance exhibited stability across temperature variations, highlighting the material's robust performance. A significant link was observed between the dimensions of the samples and their dielectric behavior, creating a reliable database for simulating the properties of MgTiO₃ ceramics under various conditions. The findings enhance our understanding of how microstructural factors affect dielectric performance, facilitating the further development of MgTiO₃-based ceramics for advanced electronic applications.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced high-temperature energy storage performance of COC by suppressing carrier transport

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-05 DOI: 10.1007/s10854-025-14671-9

Yiwei Zhang, Jiaqi Zhang, Qiyue Zhang, Changhai Zhang, Tiandong Zhang, Yongquan Zhang, Yue Zhang, Qingguo Chi

{"title":"Enhanced high-temperature energy storage performance of COC by suppressing carrier transport","authors":"Yiwei Zhang, Jiaqi Zhang, Qiyue Zhang, Changhai Zhang, Tiandong Zhang, Yongquan Zhang, Yue Zhang, Qingguo Chi","doi":"10.1007/s10854-025-14671-9","DOIUrl":"10.1007/s10854-025-14671-9","url":null,"abstract":"<div>Polymer dielectric film capacitors serve as crucial energy storage devices in modern electronic systems. However, the conventional dielectric materials have high conduction loss at elevated temperature. Hence, we propose a synergistic regulation strategy based on molecular traps to improve the high-temperature energy storage performance of cyclic olefin copolymer (COC). Firstly, the polar group maleic anhydride (MAH) is introduced into the COC molecular chain through the structure design, which creates deep energy traps to suppress intrachain charge transport. Furthermore, the intermolecular charge trap is constructed by introducing molecular semiconductor PCBM, which has high electron affinity energy (2.6–2.8 eV), realizing the intramolecular and intermolecular charge transport co-inhibition. The results show that COC-g-MAH/PCBM-0.10 exhibits a maximum discharge energy density (Ue) of 4.47 J/cm3 under 620 kV/mm at 120 ℃, and the efficiency (η) above 90%, which is 85% higher than COC. It’s noteworthy that at 120 ℃ and 500 kV/mm, after 50,000 charge–discharge cycles, the η of COC-g-MAH/PCBM-0.10 still remains at 92%, proving it has excellent high-temperature cycling stability. This strategy based on trap design provides a new paradigm for advanced dielectric materials with high energy storage performance and stability, demonstrating significant potential for practical applications.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of additives and silver methanesulfonate concentration on the preparation of Sn–Ag–Cu micro-bumps

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-05 DOI: 10.1007/s10854-025-14668-4

Xiaolin Su, Xiangqing Liu, Jie Yu, Chenyu Li, Honghai Cao, Haitao Ma

{"title":"Impact of additives and silver methanesulfonate concentration on the preparation of Sn–Ag–Cu micro-bumps","authors":"Xiaolin Su, Xiangqing Liu, Jie Yu, Chenyu Li, Honghai Cao, Haitao Ma","doi":"10.1007/s10854-025-14668-4","DOIUrl":"10.1007/s10854-025-14668-4","url":null,"abstract":"<div>In this study, Sn–Ag–Cu solder micro-bumps were successfully prepared on copper mask substrates with a diameter of 100 µm by electrodeposition process. We systematically compared the effects of different leveling agents and surfactants on the microscopic morphology and chemical composition of electrodeposited coatings. We analyzed the role of additives on the polarization behavior of the plating solution using polarization curves. The impact of silver methanesulfonate concentration on the plating coating was also investigated. The experimental results indicate that when employed individually as a leveling agent in the plating solution, methanol or triethanolamine exerts a significant effect on enhancing the smoothness of the plated coating and increasing the polarization of the plating solution. However, it is worth noting that when the two leveling agents co-exist, it leads to a decrease in the cathodic polarization and an increase in the silver content. It was further found that combining methanol and surfactant OP-10 in appropriate ratios could increase the cathodic polarization and promote grain refinement. Electrodeposition at low concentrations of silver methanesulfonate resulted in dense and uniform Sn–Ag–Cu coatings with good overall consistency, and the silver content of the coatings was as low as 1.63 wt%. The prepared plating coating features uniform element distribution, and the intermetallic compounds show good uniformity in distribution and size after reflow soldering, indicating excellent brazing performance. This study provides a practical technical solution for fabricating highly reliable and high-density lead-free micro-bumps and guides the theoretical development.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of wire diameter, tape thickness, and rolling ratio on the superconducting properties of monocore Fe/MgB2 conductors

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-05 DOI: 10.1007/s10854-025-14655-9

Mahran Shahadeh, Qays Ahmed, Ibrahim Belenli

{"title":"Effect of wire diameter, tape thickness, and rolling ratio on the superconducting properties of monocore Fe/MgB2 conductors","authors":"Mahran Shahadeh, Qays Ahmed, Ibrahim Belenli","doi":"10.1007/s10854-025-14655-9","DOIUrl":"10.1007/s10854-025-14655-9","url":null,"abstract":"<div>This study investigates the influence of initial wire diameter and subsequent cold deformation on the superconducting properties of MgB2 wires and tapes fabricated using the in situ powder-in-tube method. We manufactured wires and tapes by filling the iron tube with unreacted Mg + 2B powder. The 15 mm diameter tube underwent a groove rolling process to reduce its diameter to 3 mm to produce wire. The wire underwent a multi-stage cold drawing process down to 1.3 mm diameter. During this process, appropriate lengths of wire were cut at specific drawing stages as the diameter reached 2.5 mm, 2.0 mm, 1.7 mm, and 1.3 mm. Some wire pieces were spared in wire form. The wires, each with different diameters, were cold flat rolled into tapes of 1.2 mm, 0.9 mm, 0.6 mm, and 0.4 mm. The intermediate heat treatments were applied between some processing steps to reduce the mechanical stress induced due to the mechanical deformation processes. Wire and tape samples of about 160 mm long were cut and heat treated at 700 °C for 2 h using a tube furnace, then tested for determination of their superconducting properties. The samples used for the tests were approximately 25 mm long and taken from the middle of heat-treated samples. Current–voltage measurements were carried out at 25 K between 3.5 T and 5.2 T magnetic fields. Resistance–temperature characterizations were conducted at zero and 4 T magnetic fields. The fabricated wires and tapes were analyzed to understand the relationship between processing, structure, and superconducting performance.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10854-025-14655-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced performances and in-situ microscopic domain evolution of Cu-doped (Ba0.94Ca0.06)(Zr0.05Ti0.95)O3 ceramic by high-temperature poling 通过高温极化提高掺铜 (Ba0.94Ca0.06)(Zr0.05Ti0.95)O3陶瓷的性能和原位微观畴演化

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-04 DOI: 10.1007/s10854-025-14722-1

Yingchun Liu, Xianghe Meng, Wenming Shi, Yuanhao Deng, Hongjun Zhang

{"title":"Enhanced performances and in-situ microscopic domain evolution of Cu-doped (Ba0.94Ca0.06)(Zr0.05Ti0.95)O3 ceramic by high-temperature poling","authors":"Yingchun Liu, Xianghe Meng, Wenming Shi, Yuanhao Deng, Hongjun Zhang","doi":"10.1007/s10854-025-14722-1","DOIUrl":"10.1007/s10854-025-14722-1","url":null,"abstract":"<div>The high-temperature poling strategy (110 °C, 30 kV/cm, 20 min) was imposed on Cu-doped (Ba0.94Ca0.06)(Zr0.05Ti0.95)O3 ceramics which had the Curie temperature of 117 °C, to enhance the piezoelectric performances. The high-temperature poled piezoelectric constants d33 and electromechanical coupling factors kp were 410 pC/N and 0.516, which were enhanced by 17.1% and 15.4%, respectively, higher than that of traditional poled ones. Effects of high-temperature poling on the switching characteristic between non-180° and 180° domains were verified by the intensity ratio of splitting peaks at 2θ around 45°, using the X-ray diffraction analysis. The high-temperature poled samples showed more asymmetric hysteresis loops, with higher internal bias field of 1.8 kV/cm, maximum polarization of 18.5 μC/cm2, and residual polarization of 10.7 μC/cm2, but lower coercive field of 2.5 kV/cm and smaller positive hysteresis of 1.3%. The high-field piezoelectric constant d33* showed a pronounced jump of 112.2 pm/V at 110 °C, confirming the optimal poling temperature. The stronger compensating defect dipole field mainly contributed to the asymmetry. And the tiny and easily reversible domains, observed by the in-situ piezoelectric force microscopy, were responsible to the improvement on piezoelectricity.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of In2O3 content on the structural, thermal, and mechanical hallmarks of Na2O-BaO-ZnO-Fe2O3-P2O5 glass systems

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-04 DOI: 10.1007/s10854-025-14680-8

S. Ibrahim, Z. Y. Khattari, Ebrahim A. Mahdy

{"title":"Impact of In2O3 content on the structural, thermal, and mechanical hallmarks of Na2O-BaO-ZnO-Fe2O3-P2O5 glass systems","authors":"S. Ibrahim, Z. Y. Khattari, Ebrahim A. Mahdy","doi":"10.1007/s10854-025-14680-8","DOIUrl":"10.1007/s10854-025-14680-8","url":null,"abstract":"<div>Five glass compositions of the form 20Na₂O–15BaO–10ZnO–(9–x)Fe₂O₃–xIn₂O₃–46P₂O₅, where 0 ≤ x ≤ 9.0 mol%, were synthesized using a traditional melting method under ambient conditions. In these glass systems, In₂O₃ was used to partially substitute Fe₂O₃. The impact of In₂O₃ content on the structural, thermal, and mechanical properties of the glasses were thoroughly investigated. Complete characterizations were carried out using XRD, DSC, and measurements of density and molar volume. Elastic parameters, including Poisson’s ratio, were also studied. The XRD patterns confirm the amorphous nature of the examined samples. The measured glass density increased linearly (3.57–3.83 g/cm3), while the calculated molar volume decreased linearly (34.48–34.11 cm3/mol). The DSC analysis indicates that indium ions predominantly occupy network-forming positions, enhancing the rigidity of the glass network. Additionally, as inferred from the DSC data, the thermo-physical parameters Tg, Tp, and glass stability (∆GS) increased almost proportionally as In₂O₃ content was added, while the heat capacity change (∆Cp) showed an inverse relationship. Regarding the mechanical properties, all elastic parameters decreased due to the compositional changes from In₂O₃/Fe₂O₃ modifications.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential of Be2FeX (X = Ag, Au, Cd, Cu, Ga, Zn) Heusler alloys for spintronics and energy conversion technologies

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-04 DOI: 10.1007/s10854-025-14666-6

Erol Albayrak

{"title":"Potential of Be2FeX (X = Ag, Au, Cd, Cu, Ga, Zn) Heusler alloys for spintronics and energy conversion technologies","authors":"Erol Albayrak","doi":"10.1007/s10854-025-14666-6","DOIUrl":"10.1007/s10854-025-14666-6","url":null,"abstract":"<div>The aim of this study is to investigate the structural, electronic, magnetic, elastic and thermodynamic properties of Be2FeX (X = Ag, Au, Cd, Cu, Ga, Zn) Heusler alloys. These alloys, which contain the elements Be and Fe, have important applications, particularly in the aerospace industry, although they have attracted attention due to their toxic nature. Calculations using Quantum Espresso and Thermo Pw packages based on the DFT approach showed that all alloys are mechanically stable according to born stability criteria. The Be2FeAg alloy, with its moderate hardness and ductility, is suitable for structural applications where high hardness and ductility are not required. The metallic conductivity of the alloy suggests potential applications in areas such as spintronic devices, energy conversion and storage devices. Be2FeAu alloy is suitable for applications requiring mechanical strength with low ductility and medium hardness (Young’s modulus value of 161.93 GPa). Be2FeCd alloy offers significant potential for magnetic data storage and sensing applications due to its high ductility and metallic conductivity (B/G rate of 2.35). Be2FeCu alloy, with its high hardness (Young’s modulus value of 241.862 GPa) and low ductility, is ideal for applications where mechanical strength is critical. Be2FeGa alloy, with its flexible structure (B/G rate of 3.55), is suitable for energy efficiency and optoelectronic devices. Be2FeZn alloy, with its medium hardness (Young’s modulus value of 164.29GPa) and ductility (B/G rate of 2.16), has the potential for use in high temperature applications. Understanding the properties of these alloys can provide guidance for future technological applications and new materials development processes.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10854-025-14666-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of optical property variations in MBE-grown 2L, 4L, and 6L 1T′-WTe2 using ellipsometry 利用椭偏仪研究 MBE 生长的 2L、4L 和 6L 1T′-WTe2 的光学特性变化

IF 2.8 4区工程技术

Journal of Materials Science: Materials in Electronics Pub Date : 2025-04-04 DOI: 10.1007/s10854-025-14648-8

Santanu Kandar, Kamlesh Bhatt, Ashok Kapoor, Rajendra Singh

{"title":"Study of optical property variations in MBE-grown 2L, 4L, and 6L 1T′-WTe2 using ellipsometry","authors":"Santanu Kandar, Kamlesh Bhatt, Ashok Kapoor, Rajendra Singh","doi":"10.1007/s10854-025-14648-8","DOIUrl":"10.1007/s10854-025-14648-8","url":null,"abstract":"<div>This study focuses on the optical properties of MBE-grown 1T′-WTe2 using spectroscopic ellipsometry (SE). Bi-layer (2L), 4L and bulk (6L) WTe2 have been grown over a c-plane sapphire substrate using molecular beam epitaxy (MBE). Raman spectroscopy confirms the semi-metallic 1T′ phase of WTe2. Atomic force microscopy showed a uniform growth over the substrate with minimal roughness. X-ray photoelectron spectroscopy is used to calculate the chemical composition of the films, confirming nearly stoichiometric composition. X-ray diffraction of WTe2 displays peaks only corresponding to the (002) family of planes, revealing the out-of-plane epitaxial growth. Spectroscopic Ellipsometry (SE) measurement is carried out, and the obtained results are analyzed to find out the refractive index (n), extinction coefficient (k) and complex dielectric constant for all three WTe2 samples. A comparative study between the 2L, 4L and 6L WTe2 shows the variation of different optical constants with thickness. Subsequent analysis allowed the determination of absorption coefficient and band gap values from the extinction coefficient. The results revealed a zero-band gap for all the samples, corroborating with its semi-metallic 1T′ phase. These findings contribute to future applications in the field of optoelectronics.</div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 10","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0