Journal of Materials Science: Materials in Electronics最新文献

{"title":"Synthesis of ZnTe powders from green solvents by a solvothermal method. Study of the sensing properties in a CO atmosphere","authors":"José Josué Rodríguez Pizano,&nbsp;M. de la L. Olvera","doi":"10.1007/s10854-024-13818-4","DOIUrl":"10.1007/s10854-024-13818-4","url":null,"abstract":"<div><p>In this work, the characterization and testing of sensing properties of ZnTe powders for detecting carbon monoxide were investigated. The ZnTe synthesis was reached by a solvothermal process, using three different green solvents, methanol, ethanol, and isopropanol. The structural, morphological, and compositional properties of ZnTe powders were analyzed by X-ray diffraction, XRD, scanning electron microscopy, SEM, and atomic force microscopy, AFM, and X-ray energy dispersion (EDS), respectively. XRD confirmed the zincblende-type cubic phase of ZnTe, with crystallite sizes of the order of 69 nm. SEM images of all synthesized samples showed a surface covered with particles of different sizes and irregular morphologies. Finally, the sensing response of ZnTe samples to CO was measured for concentrations varying from 1 to 500 ppm at different operating temperatures, 100, 200, and 300 °C. The highest sensitivity, 18.4, was obtained for ZnTe samples synthesized from isopropanol as solvent, so ZnTe powders showed a good response for CO detection, resulting these materials promising to be applied as gas sensors.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10854-024-13818-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636735","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}

{"title":"Effect of transition metal decoration on field emission properties of vertically aligned carbon nanotubes: an interplay between conventional parameters and occupancy of 3d and 4 s states","authors":"Gulshan Kumar,&nbsp;Santanu Ghosh,&nbsp;Arushi Arora,&nbsp;Menaka Jha,&nbsp;Pankaj Srivastava","doi":"10.1007/s10854-024-13826-4","DOIUrl":"10.1007/s10854-024-13826-4","url":null,"abstract":"<div><p>The present work analyses the effect of transition metal decoration on field emission properties of vertically aligned carbon nanotubes (VACNTs). Several transition metals (Co, Ni, Cu, and Zn) have been decorated on VACNTs to examine the role of d-state occupancy on the field emission properties. It is found that d-state occupancy does play a role in governing the current density, and it is not always possible to explain the field emission results only on the basis of conventional parameters like field enhancement factor and work function. The present study shows that among the studied transition metals and their oxides, Zn and CuO-decorated VACNTs give the most promising field emission results.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636736","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}

{"title":"Influence of V2O5 loading on the dielectric properties and AC conductivity of TiO2","authors":"Ayten Ateş,&nbsp;Khawla Ben Brahim,&nbsp;Abderrazek Oueslati,&nbsp;Mohamed Gargouri","doi":"10.1007/s10854-024-13811-x","DOIUrl":"10.1007/s10854-024-13811-x","url":null,"abstract":"<div><p>The interaction between TiO₂ and V₂O₅ can not only improve the physico-chemical properties of the material but also the dielectric and conductive properties of the material. For this purpose, TiO₂ samples with 5, 7, and 10 wt% V₂O₅ were prepared by the impregnation method to investigate the dielectric properties and AC conductivity. The phase composition and morphology of the V₂O₅/TiO₂ samples were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM)-scanning transmission electron microscope (STEM). Regardless of the vanadium content, the samples exhibit non-spherical structures and particles with size in the range of 60–200 nm. The small V₂O₅ peaks in XRD were detected at 7.0 and 10 wt% V₂O₅. In addition, the specific surface area for 5 and 7 wt% V₂O₅ was determined to be 9.2 m²/g, but at 10 wt% V₂O₅ the surface area of the sample decreases to 7.5 m²/g as the titanium dioxide pores are filled by vanadium. The DR–UV–Vis spectra of V₂O₅/TiO₂ samples showed that the sample with 5 wt% V₂O₅ has isolated tetrahedrally coordinated V⁵⁺ species and increasing the V₂O₅ loading leads to the formation of octohedrally coordinated V⁵⁺ species in V₂O₅ clusters. Comparison of the Raman spectra of V₂O₅/TiO₂ and TiO₂ samples showed the formation of α-V₂O₅ on the TiO₂. In addition, a detailed analysis of the Nyquist diagrams shows how sensitively the electrical properties of the materials react to changes in temperature and frequency. Jonscher’s power law is used to analyze alternating current and conductivity, and it is found that the fluctuation of the exponent “<i>s</i>” adequately describes the conduction mechanism and agrees with CBH models. As the TiO₂ concentration increases, the value of the activation energy generated decreases. The higher presence of Ti⁴⁺ ions due to the increase in molar volume is the cause of this increase in charge carrier mobility. The effect of the grain and grain boundary on the overall impedance is revealed by a dielectric study, which also confirms that the combination of titanium dioxide and vanadium oxide nanoparticles improves the dielectric and AC conductivity of the samples.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636737","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}

{"title":"Unveiling the power of 2D carbon-based electrically conductive adhesive: a comparative analysis on structure and performance","authors":"Naghmeh Gholamalizadeh,&nbsp;Sajjad Mirfaeghi,&nbsp;Farhad Sharif,&nbsp;Saeedeh Mazinani,&nbsp;Ali Mohammad Bazargan","doi":"10.1007/s10854-024-13775-y","DOIUrl":"10.1007/s10854-024-13775-y","url":null,"abstract":"<div><p>The rise in popularity of carbon-based adhesives is revolutionizing the industry, offering eco-friendly alternatives that can be recycled while protecting the environment from the harmful effects of solder metal. In this ground breaking study, we delve into the impact of different carbon-based conductive fillers on the overall performance of the adhesive. From reduced graphene oxide (rGO) to thermally and chemically expanded graphite (EG), we explore these fillers’ intricate 3D network structure and how they enhance both the final product’s electrical conductivity and mechanical strength. According to the findings of this research, the structure of 3D and interwoven EG plays the prominent role in electrical conductivity. Maintaining the 3D and stable structure after making the composite is due to the structure of EG, which prevents the graphene sheets from falling on top of each other, preventing the interaction of free electrons with vertical sheets. On the other hand, a similar structure was obtained using two separate methods of thermal and chemical expansion, which is optimal in terms of electrical conductivity. Our findings reveal that an adhesive containing 17.5 wt% of EG achieved a volume resistivity of 2.5 Ω cm, showcasing the remarkable conductivity of these materials. The unique 3D network structure improves electrical performance and aids in the curing process by reducing curing enthalpy to 147.19 J g⁻¹, resulting in superior mechanical properties and adhesion. Furthermore, by studying the effects of functional groups and surface characteristics of chemically expanded graphite (CEG), we discovered that sharp edges and wrinkled sheets significantly enhance the adhesive’s tensile strength, surpassing 10.24 ± 1.2 MPa. The Young’s modulus of 96.24 ± 6 MPa represents moderate stiffness while also allowing for flexibility. The results show carbon-based adhesives’ potential and pave the way for a more sustainable product.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636664","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}

{"title":"Enhancement of photocatalytic activity of BiOCl by doping with variable metal Co and related studies on degradation of organic pollutants","authors":"Yongli Yin,&nbsp;He Kang,&nbsp;Haifeng Zhou,&nbsp;Peng Liang","doi":"10.1007/s10854-024-13833-5","DOIUrl":"10.1007/s10854-024-13833-5","url":null,"abstract":"<div><p>A novel BiOCl/Co catalyst was constructed by in situ doping of metal Co nanoparticles on n-type BiOCl nanosheets. The percentage of metal Co incorporated in the photocatalysts was adjusted to improve the degradation performance of the new catalysts against pollutants. The optimized BiOCl/Co achieved up to 95.5% photocatalytic degradation efficiency of rhodamine B (RhB). This might be attributed to the enhanced visible light absorption ability of BiOCl/Co by plasmon resonance (SPR) as well as the effective interfacial separation and transport of carriers in BiOCl/Co. BiOCl/Co showed excellent mineralization capacity and reuse performance in the degradation of RhB. Furthermore, it was shown that photogenerated h⁺, ⋅OH and ⋅O₂⁻ were the major reactive substances for dye degradation. The photodegradation mechanism of RhB by BiOCl/Co was elucidated in this paper.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636831","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}

{"title":"Effect of molarity on the optical and structural properties of CdS thin films deposited by spray pyrolysis on flexible plastic substrates","authors":"M. G. Faraj,&nbsp;Hawbash H. Karim,&nbsp;Aryan F. Qader,&nbsp;Ibrahim Nazem Qader,&nbsp;Ronak Taher Ali","doi":"10.1007/s10854-024-13839-z","DOIUrl":"10.1007/s10854-024-13839-z","url":null,"abstract":"<div><p>Solar cell substrates made from high-temperature polymer bases can be applied to various types of thin-film devices. Studying how different substrates impact the properties of semiconductor films is crucial. In this research, chemical spray pyrolysis (CSP) was utilized to coat thin layers of cadmium sulfide (CdS) on polyimide (PI) plastic bases. The coating process involved using distinct precursor solutions with molar concentrations of 0.1, 0.2, 0.3, and 0.4 M. X-ray diffraction (XRD) analysis was applied to assess the crystal structural characteristics. The XRD findings demonstrated the correct phase development in the CdS structure. The outcomes revealed that the crystallite size was directly related to the molarity concentration, with larger crystals forming at higher concentrations. Larger crystallites can lower grain boundary density, which can affect the film’s electrical and mechanical properties. Furthermore, a hexagonal structure was observed in the CdS layers. The optical band gap values of the CdS thin films increased from 2.16 to 2.21 eV as the molarity concentrations were elevated.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636832","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}

{"title":"Construction of WO3–visible light–H2O2 advanced oxidation system for degradation of organic pollutant","authors":"Yasi Li","doi":"10.1007/s10854-024-13827-3","DOIUrl":"10.1007/s10854-024-13827-3","url":null,"abstract":"<div><p>The escalating pollution of water resources by organic pollutants necessitates the development of efficient and eco-friendly treatment technologies. In this study, a WO₃–visible light–H₂O₂ (WO₃–Vis–H₂O₂) advanced oxidation system was constructed, and the difficult-to-degrade azo dye methyl orange (MO) was selected as the target of organic pollutants. Under the optimal conditions of the system, 97.9% of MO can be degraded under 100 min of visible light irradiation. The degradation process confirmed to the first-order kinetic equation, and the apparent rate constant k is 0.03909 min⁻¹. The degradation efficiency of MO by this system was 5.54 times higher than that of WO₃ photocatalytic degradation of MO. Free radical capture experiments proved that ·OH was the main active species. The system realized the effect of the iron-free heterogeneous photo-Fenton reaction, and WO₃ can be reused. This work not only presents a green and sustainable approach to the degradation of organic pollutants but also highlights the potential of visible light catalyst–visible–H₂O₂ system for broader environmental remediation applications.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636958","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}

{"title":"Study on the microwave dielectric properties of 0.84MgNb2-x(Ti1/2W1/2)xO6-0.16CaTiO3 ceramic","authors":"Yueming Li,&nbsp;Jiajun Huang,&nbsp;Binxuan Jiang,&nbsp;Yi Sun,&nbsp;Kai Li,&nbsp;Zongyang Shen,&nbsp;Zhumei Wang,&nbsp;Huanhuan Guo","doi":"10.1007/s10854-024-13813-9","DOIUrl":"10.1007/s10854-024-13813-9","url":null,"abstract":"<div><p>In order to meet the demand of high-quality microwave dielectric ceramics for the development of wireless communication, 0.84MgNb_2-<i>x</i>(Ti_1/2W_1/2)_<i>x</i>O₆-0.16CaTiO₃(<i>x</i> = 0, 0.03, 0.05, 0.07, 0.09, 0.11) microwave dielectric ceramics were prepared by solid-phase method. The effects of phase structure, sintering properties, microstructure, and microwave dielectric properties of 0.84MgNb₂O₆-0.16CaTiO₃ ceramics in which the Nb⁵⁺ ionic substituted with different contents of (Ti_1/2W_1/2)⁵⁺ were studied. The results indicate that the partial Nb⁵⁺ in the 0.84MgNb_2-<i>x</i>(Ti_1/2W_1/2)_<i>x</i>O₆-0.16CaTiO₃ nominal composition are replaced by the complex cations (Ti_1/2W_1/2)⁵⁺ in the crystal structure, and no new phase is produced. With the gradual increase of (Ti_1/2W_1/2)⁵⁺ addition, the bulk density of 0.84MgNb_2-<i>x</i>(Ti_1/2W_1/2)_<i>x</i>O₆-0.16CaTiO₃ ceramics increased, the sintering temperature did not significantly change, the ceramic cell volume decreased, and the material polarizability and filling rate decreased, resulting in a decrease in the ceramics’ dielectric constant ε_r, the quality factor <i>Q</i> × <i>f</i> increases, and the frequency temperature coefficient τ_<i>f</i> shifts to a positive value. The 0.84MgNb_1.95(Ti_1/2W_1/2)_0.05O₆-0.16CaTiO₃ ceramic with <i>x</i> = 0.05 composition sintered at 1250 °C for 4 h holding time has the best microwave dielectric properties: <i>ε</i>_r = 21.52, <i>Q</i> × <i>f</i> = 96983 GHz, and τ_<i>f</i> = − 3.8 × 10^–6/ °C.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636833","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}

{"title":"An investigation on preparation and wave-absorbing properties of carbon nanotube/ferrite/polyaniline complexes","authors":"Runqing Liu,&nbsp;Lihai Yang,&nbsp;Luyao Wang,&nbsp;Yuanquan Yang","doi":"10.1007/s10854-024-13864-y","DOIUrl":"10.1007/s10854-024-13864-y","url":null,"abstract":"<div><p>Conventional wave-absorbing materials effectively absorb electromagnetic waves in specific frequency bands and however cannot cope with interference and radiation in a wide frequency range. Therefore, materials with broadband wave-absorbing properties are of great significance for electromagnetic interference and radiation, protection of equipment, and human health. In this experiment, carbon nanotubes/nickel–zinc ferrite/polyaniline complex and carbon nanotubes/barium–zinc ferrite/polyaniline polymers were prepared by solution blending and in situ polymerization, respectively. The results show that the carbon nanotube/NiZn ferrite/polyaniline complexes has a good impedance matching absorption effect with a peak of − 34.3 dB at 3.68 GHz prepared by solution reaction method and with a maximum reflection loss of − 28.95 dB at 12.44 GHz by in situ polymerization method. Carbon nanotube/barium–zinc ferrite/polyaniline complexes were prepared by solution reaction and in situ polymerization methods, and the samples prepared by in situ polymerization had better absorption properties, with an effective absorption bandwidth up to 8.9 GHz (6.5–14.6 GHz and 16.1–16.8 GHz) and a reflection loss reaching a maximum of − 37.95 dB at 12.84 GHz.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600735","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}

{"title":"Magnetic-polymer flexible composites for electromagnetic interference shielding applications","authors":"V. Seetha Rama Raju,&nbsp;Sateesh Kandukuri,&nbsp;A. K. Singh,&nbsp;V. Satya Narayana Murthy","doi":"10.1007/s10854-024-13856-y","DOIUrl":"10.1007/s10854-024-13856-y","url":null,"abstract":"<div><p>NiCuZnCo ferrites are ideal for electromagnetic interference (EMI) shielding applications due to their high permeability and low loss. These ferrites have an operating frequency of around 1 GHz due to the Snoek’s limit. To further enhance the operating frequency range of these materials, the present work reports the development of magnetic-polymer composites by embedding NiCuZnCo ferrite into a poly-dimethyl-siloxane (PDMS) polymer matrix. These composites blend the properties of ferrite and polymer, offering distinct features. The thermal stability of the PDMS-magnetic composite is observed at ~400 °C. The surface morphology of ferrite and its integration with the PDMS matrix are investigated using a field emission-scanning electron microscope (FE-SEM). The morphology of the ferrite in the composite material is nearly spherical. While the magnetic-PDMS composites exhibit lower saturation magnetization than the pure ferrite, the magnetization steadily increases with rising ferrite content in the PDMS matrix. Notably, the DC electrical resistivity of the ferrite-PDMS samples is of the order of 10¹² Ω.cm at room temperature. The samples’ electromagnetic properties, such as complex permittivity, complex permeability, and shielding effectiveness, are investigated in the frequency range of 1.0 MHz to 3.6 GHz. Interestingly, the composites showcase ferromagnetic resonance between the 1.8 and 2.6 GHz range, suggesting potential applicability in EMI shielding applications. Because of the higher ferrite concentration, the composite with 45% ferrite-loaded PDMS has a high SE_A of approximately 56 dB at a frequency of 1.7 GHz.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 32","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636830","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}