Journal of Electronic Materials最新文献_第7页

Preparation and Thermal Emission Characteristics of [Ca24Al28O64]4+:4e− Electronic Compounds Ca24Al28O64]4+:4e- 电子化合物的制备与热发射特性

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-17 DOI: 10.1007/s11664-024-11353-w

Lijun Cao, Yixin Xiao, Mingming Wang, Boyu Jiang, Xin Zhang, Wei Huang, Zhengyang Jin

{"title":"Preparation and Thermal Emission Characteristics of [Ca24Al28O64]4+:4e− Electronic Compounds","authors":"Lijun Cao, Yixin Xiao, Mingming Wang, Boyu Jiang, Xin Zhang, Wei Huang, Zhengyang Jin","doi":"10.1007/s11664-024-11353-w","DOIUrl":"https://doi.org/10.1007/s11664-024-11353-w","url":null,"abstract":"The [Ca24Al28O64]4+:4e− electronic compounds (C12A7:e−) with low work function and stable chemical properties have been employed in electron emission and optical devices. In this paper, C12A7:e− was successfully prepared using CaO, Al2O3, and Al powders through spark plasma sintering (SPS) at 1250°C for 20 min. The grain size of the sample does not exceed 10 µm. The sample exhibits typical Raman peaks at 175 cm−1, 329 cm−1, 510 cm−1, 780 cm−1, and a clear ultraviolet absorption peak at 2.6 eV. The carrier concentration of the sample reaches 1.67 × 1021 cm−3. The emission current density of the sample at 4000 V and 1100°C is 1.34 A/cm2, with a fluctuation of no more than 5%. The zero-field emission current density is 1.18 A/cm2 at 1100°C. The lattice thermal conductivity of C12A7:e− decreases with increasing temperature, reaching 12.59 W/(K m) at 1100°C. In addition, the band structure of C12A7:e− includes valence band (VB), cage conduction band (CCB), and frame conduction band (FCB), and CCB extends to the Fermi level and has a bandgap of 0.82 eV with FCB. This makes C12A7:e− exhibit a typical band conduction mechanism. The electron emission characteristics of C12A7:e− are derived from the contributions of the s-orbital electrons of Ca atoms and the p-orbital and d-orbital electrons of Al atoms. This article simplifies the preparation steps of C12A7:e− cathode materials, shortens the synthesis cycle, and provides a foundation for the research of C12A7:e− cathode.","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"77 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176965","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

UV-Irradiated Photocatalytic Activity of α-Fe2O3/ZnO Nanocomposites for Wastewater Treatment 用于废水处理的 α-Fe2O3/ZnO 纳米复合材料的紫外线辐射光催化活性

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-17 DOI: 10.1007/s11664-024-11361-w

Sonia, Harita Kumari, Monica, Sourabh Sharma, Reenu, Rakesh Kumar, Suman, Surjeet Chahal, Suresh Kumar, Parmod Kumar, Ashok Kumar

{"title":"UV-Irradiated Photocatalytic Activity of α-Fe2O3/ZnO Nanocomposites for Wastewater Treatment","authors":"Sonia, Harita Kumari, Monica, Sourabh Sharma, Reenu, Rakesh Kumar, Suman, Surjeet Chahal, Suresh Kumar, Parmod Kumar, Ashok Kumar","doi":"10.1007/s11664-024-11361-w","DOIUrl":"https://doi.org/10.1007/s11664-024-11361-w","url":null,"abstract":"This work demonstrates the successful synthesis of pure α-Fe2O3, pure ZnO, and α-Fe2O3/ZnO nanocomposites with weight ratios of 1:1, 1:2, 1:3, and 1:4 by an efficient hydrothermal method for wastewater treatment. The structural, morphological, optical, and magnetic properties of the synthesized samples were characterized by x-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), ultraviolet–visible (UV–Vis) spectroscopy, and vibrating-sample magnetometry (VSM), respectively. The XRD pattern confirmed the successful formation of the synthesized samples. Particle size in the range of 30–36 nm was calculated for the nanocomposite using HR-TEM. UV–Vis spectroscopy was used to calculate the optical bandgap of the synthesized nanocomposites, which varied from 1.96 eV (FZ11) to 2.27 eV (FZ14). This difference was explained by the introduction of ZnO, which is a wide-bandgap semiconductor. The value of magnetization decreased from 0.37 emu/g to 0.04 emu/g as the content of ZnO increased. The α-Fe2O3/ZnO nanocomposite with a weight ratio of 1:4 showed 85% photocatalytic degradation of methylene blue (MB) dye under UV light illumination with synchronized extraction for 105 min.","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"107 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176962","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

Joint Interface Microstructure Analysis of Gallium-based Thermal Interface Material During Reflow 镓基热敏界面材料在回流过程中的接合界面微观结构分析

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-17 DOI: 10.1007/s11664-024-11360-x

Bo-Yi Lin, Ting-Chun Lin, Chin-Li Kao, Shih-Chieh Hsiao, Pei-Hsuan Tseng, Jui-Chao Kuo

引用次数: 0

Equivalent Circuit Model of Magnetoelectric Composite Nanoparticles 磁电复合纳米粒子的等效电路模型

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-16 DOI: 10.1007/s11664-024-11358-5

Zeinab Ramezani, Sakhrat Khizroev

{"title":"Equivalent Circuit Model of Magnetoelectric Composite Nanoparticles","authors":"Zeinab Ramezani, Sakhrat Khizroev","doi":"10.1007/s11664-024-11358-5","DOIUrl":"https://doi.org/10.1007/s11664-024-11358-5","url":null,"abstract":"This study presents an analysis of magnetoelectric nanoparticles (MENPs) through the development of equivalent circuits to predict the frequency-dependent magnetoelectric coefficient, with a focus on the widely utilized CoFe2O4@BaTiO3 core–shell configuration. This approach involves –derivation of phenomenological expressions that capture the dynamic behavior of MENPs under varying magnetic and electric fields. By integrating piezoelectric and magnetostrictive constitutive equations, along with consideration of dynamic effects and bio-load conjugation, a magneto-elasto-electric effect equivalent circuit has been constructed. This circuit model not only facilitates the investigation of longitudinal data in cube-shaped MENPs but also offers insights into fundamental biological processes. The versatility of this model is shown through translation to other core–shell nanoparticles, composite structures, and multiferroic nanostructures. This analysis provides quantitative predictions of the magnetoelectric coefficients, enhancing general understanding of MENP characteristics across a broad frequency range. Furthermore, the study highlights the framework for future refinement to incorporate intrinsic composition-specific resonances, such as ferromagnetic and ferroelectric resonances, to further significantly improve the nanoparticles’ performance. Overall, this work lays the groundwork for future technology to intelligently and wirelessly control biological processes using MENPs, thus paving a way for innovative biomedical applications. This quantitative approach may facilitate further interdisciplinary research and contribute to advancement of magnetoelectric materials and their applications.","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"12 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176990","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 Ti Substitution on the Structural, Optical, and Magnetic Properties of Mn-Mg-Cu-Zn Ferrite Prepared by the Sol–Gel Route 钛替代物对溶胶-凝胶法制备的锰镁铜锌铁氧体的结构、光学和磁学特性的影响

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-16 DOI: 10.1007/s11664-024-11373-6

Rozita Sefatgol, Ahmad Gholizadeh, Haniyeh Hatefi

{"title":"Effect of Ti Substitution on the Structural, Optical, and Magnetic Properties of Mn-Mg-Cu-Zn Ferrite Prepared by the Sol–Gel Route","authors":"Rozita Sefatgol, Ahmad Gholizadeh, Haniyeh Hatefi","doi":"10.1007/s11664-024-11373-6","DOIUrl":"https://doi.org/10.1007/s11664-024-11373-6","url":null,"abstract":"In this study, Mn0.15Mg0.15Cu0.2Zn0.5Fe2−xTixO4 (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6) nanoparticles were synthesized using the sol–gel auto-combustion method, and their structural, magnetic, and optical properties were investigated. Various characterization techniques were employed, including X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and magnetization measurements. The Rietveld refinement of XRD data confirmed that the samples exhibited a cubic spinel structure with space group Fd (overline{3 })m. This conclusion was further supported by the results of FTIR and Raman spectroscopy. Interestingly, the particle size of the samples increased with an increase in the tetravalent Ti4+ substitution. In contrast, the crystallite size and lattice parameter decreased. The optical properties of the samples were studied, revealing a maximum energy gap value in sample x = 0.3. Furthermore, the saturation magnetization decreased from 41.47 emu/g in sample x = 0.0 to 7.36 emu/g in sample x = 0.6. Overall, this comprehensive investigation demonstrated the tunable properties of Mn0.15Mg0.15Cu0.2Zn0.5Fe2−xTixO4 nanoparticles and highlighted their potential for various applications, particularly in the fields of magnetism and optoelectronics.","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"19 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176966","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

Interface-Induced Modifications in the Ferroelectric properties of 200 MeV Ag+15 Ion-Irradiated ZnO-BaTiO3 Nanocomposite Films 200 MeV Ag+15 离子辐照 ZnO-BaTiO3 纳米复合薄膜铁电特性的界面诱导改变

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-15 DOI: 10.1007/s11664-024-11367-4

Hetal Kundalia, Ashish Ravalia, Ramcharan Meena, K. Asokan, Brinda Vyas, D. G. Kuberkar

{"title":"Interface-Induced Modifications in the Ferroelectric properties of 200 MeV Ag+15 Ion-Irradiated ZnO-BaTiO3 Nanocomposite Films","authors":"Hetal Kundalia, Ashish Ravalia, Ramcharan Meena, K. Asokan, Brinda Vyas, D. G. Kuberkar","doi":"10.1007/s11664-024-11367-4","DOIUrl":"https://doi.org/10.1007/s11664-024-11367-4","url":null,"abstract":"Studies on nanocomposite films with an optimized composition of 0.6ZnO-0.4BaTiO3/Al2O3 were carried out to understand the effect of swift heavy ion (SHI)-induced modifications on the ferroelectric properties inspired by interface mixing. XRD measurements showed the presence of ZnO and BaTiO3 phases in pristine film which was modified by irradiation. Surface modifications induced by SHI irradiation, as studied using AFM, revealed the evolution of nanosized rod and hillock-like microstructure on the film surface with the increase in irradiation dose. The variations in film thickness and elemental compositions were studied using RBS spectrometry, and an intermixing zone ~ 25 nm was identified in the film irradiated by 5 × 1010 ions/cm2 which increased with the ion fluence. Ferroelectric (P-E) loops showed a significant change in the hysteresis characteristics which was understood on the basis of modifications in the surface morphology and the interface between the wurtzite-structured ZnO and the perovskite-structured BaTiO3 responsible for the space charge region.","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"53 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176993","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

Defect and Vacancy Engineering Improved Microwave Absorption in a BaCo2Fe16O27 Composite with Sm Doping/Annealing 缺陷和空位工程改善了掺杂/退火 Sm 的 BaCo2Fe16O27 复合材料的微波吸收能力

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-14 DOI: 10.1007/s11664-024-11351-y

Haoqi Dong, Zhiqiang Yun, Ganhong Zheng, Wei Ding, Zhenxiang Dai, Chuhong Zhu, Meiling Wang

{"title":"Defect and Vacancy Engineering Improved Microwave Absorption in a BaCo2Fe16O27 Composite with Sm Doping/Annealing","authors":"Haoqi Dong, Zhiqiang Yun, Ganhong Zheng, Wei Ding, Zhenxiang Dai, Chuhong Zhu, Meiling Wang","doi":"10.1007/s11664-024-11351-y","DOIUrl":"https://doi.org/10.1007/s11664-024-11351-y","url":null,"abstract":"Defects and defective technology are considered to be an efficient method for improving electromagnetic wave (EMW) absorption performance. In this study, W-type barium hexaferrite BaCo2Fe16O27 (BCFO) composites with Sm doping were synthesized by a simple ball milling and subsequent annealing process. The phase structure characteristics, magnetic properties, and microwave absorption performance of the BCFO composites were systematically investigated. Specifically, Sm-doped and annealed BCFO composites demonstrated outstanding microwave absorption characteristics because of the efficient interaction between ideal impedance matching and large dielectric loss, specifically, a minimum reflection loss (RL) value of −28.57 dB at 8.5 GHz with 3 mm thickness. Moreover, a broad effective absorption bandwidth reaches 11 GHz, covering the range of 7–18 GHz. It is believed that defects and vacancies induced by Sm doping or annealing in the Ar atmosphere may be an effective means for enhancing microwave absorption, and related mechanisms are discussed in detail.","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"34 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176991","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

Effects of CZT Substrate Surface Treatment on IR-Transmittance in the Annealing Process CZT 基底表面处理对退火过程中红外线透过率的影响

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-14 DOI: 10.1007/s11664-024-11315-2

Chao Xu, Shangshu Li, Changhe Zhou

{"title":"Effects of CZT Substrate Surface Treatment on IR-Transmittance in the Annealing Process","authors":"Chao Xu, Shangshu Li, Changhe Zhou","doi":"10.1007/s11664-024-11315-2","DOIUrl":"https://doi.org/10.1007/s11664-024-11315-2","url":null,"abstract":"The application of CdZnTe(CZT) crystals in infrared focal plane detectors and x-ray imaging detectors is hindered by the low infrared transmittance (IRT) and the presence of Cd/Te inclusions/precipitation. Over the preceding decades, strategies involving Cd vapor control during the growth process and substrate post-annealing have been posited to address these challenges. Presently, the prioritized approach is the utilization of substrate post-annealing, owing to the limited precision in comprehending the Cd-Te equilibrium and the intricacies associated with Cd vapor control technology. This study delves into the effect of the removed surface layer depth of a CZT and the selection of the (111) A-face or (111) B-face on IRT during Cd atmosphere annealing. It is recommended that a minimum of 60 μm of the surface layer be eliminated using chemical mechanical polishing technology before annealing. Experimental findings further reveal that Cd atom diffusion from the (111) A-face results in an IRT enhancement of up to 60%, in stark contrast to the slight improvement observed with the (111) B-face after annealing. The mechanism of Cd atom diffusions affecting the IRT in the annealing process is discussed.","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"9 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176992","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

Low-Temperature Activation of MOF-74 Composite-Derived Materials for Supercapacitors 用于超级电容器的 MOF-74 复合衍生材料的低温活化

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-13 DOI: 10.1007/s11664-024-11369-2

Yichun Su, Lingling Chen, Yihao Chen, Wenhao Feng, Yiluo Tian, Huan Pang

引用次数: 0

Stacked Layers of Nb2O5/Pt/Nb2O5 Designed as Conducting Oxides, Terahertz Band Filters, and Semitransparent Light Absorbers 堆叠层 Nb2O5/Pt/Nb2O5 可用作导电氧化物、太赫兹带滤波器和半透明光吸收器

IF 2.1 4区工程技术

Journal of Electronic Materials Pub Date : 2024-08-12 DOI: 10.1007/s11664-024-11354-9

Laila H. Gaabour, A. F. Qasrawi, Seham R. Alharbi

{"title":"Stacked Layers of Nb2O5/Pt/Nb2O5 Designed as Conducting Oxides, Terahertz Band Filters, and Semitransparent Light Absorbers","authors":"Laila H. Gaabour, A. F. Qasrawi, Seham R. Alharbi","doi":"10.1007/s11664-024-11354-9","DOIUrl":"https://doi.org/10.1007/s11664-024-11354-9","url":null,"abstract":"Herein, stacked layers of Nb2O5 structured with platinum nanosheets were fabricated to handle multifunctional electro-optic operations. The stacked layers of Nb2O5/Pt/Nb2O5 (NPN) were prepared by the ion coating technique and exhibited an amorphous structure. A remarkable increase in light absorption by more than 480% was achieved via the insertion of Pt nanosheets between layers of Nb2O5. Pt nanosheets with thicknesses of 50 nm and 100 nm successfully increased the electrical conductivity of the NPN layers by five and eight orders of magnitude, respectively, without losing transparency. This feature makes the NPN stacks suitable for transparent conducting oxide applications. The insertion of Pt nanosheets between layers of Nb2O5 also converted the conductivity from p- to (n)-type. In addition, NPN stacked layers exhibited highly enhanced dielectric properties, demonstrating an increase in the dielectric constant by 190%, making the NPN stacked layers suitable for use in the design of high-κ gate dielectric devices. Moreover, when treated as optical filters, Drude–Lorentz fittings of the dielectric spectra showed that Pt nanosheets increased the free carrier density and the plasmon frequency. The terahertz cutoff frequency of the NPN devices steadily increased with increasing Pt nanosheet thickness. The terahertz cutoff frequency for NPN optical filters comprising a 100-nm-thick layer of Pt displayed values of 7.5 THz and 5.0 THz in the infrared and visible light ranges. The NPN stacks have potential for use in terahertz applications.<h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":626,"journal":{"name":"Journal of Electronic Materials","volume":"23 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176995","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