Materials Science and Engineering: B最新文献

{"title":"Synergistic enhancement of carbon nanotube field emission properties through copper nanoparticle flake decoration under argon and nitrogen gas plasma","authors":"Mohammad Moeen Hasan Raza ,&nbsp;Firoz Khan ,&nbsp;Shah Masheerul Aalam ,&nbsp;Mohd. Sadiq ,&nbsp;Javid Ali","doi":"10.1016/j.mseb.2025.118434","DOIUrl":"10.1016/j.mseb.2025.118434","url":null,"abstract":"<div><div>Exploring carbon nanotubes (CNTs) for their low turn-on field and rapid emission has been a key focus in developing an optimal vacuum-based electron emitter. Despite the potential of CNTs for emission applications, specific limitations<!--> <!-->impact their overall efficacy. This study focuses on overcoming these limitations by altering the surface morphology of CNTs through the decoration of Cu nanoparticle (Cu NP) flakes via an Ar + N₂ gas-based plasma process at different plasma powers. The field emission parameters demonstrate substantial improvements, including a reduced turn-on field <span><math><mrow><mo>(</mo><msub><mi>E</mi><mrow><mi>to</mi></mrow></msub><mo>)</mo></mrow></math></span> from <span><math><mn>2.631</mn><mo>→</mo><mn>1.917</mn><mspace></mspace><mi>V</mi><mo>/</mo><mi>μm</mi></math></span> and threshold field <span><math><mrow><mo>(</mo><msub><mi>E</mi><mrow><mi>th</mi></mrow></msub><mo>)</mo></mrow></math></span> from <span><math><mn>3.768</mn><mo>→</mo><mn>2.552</mn><mspace></mspace><mi>V</mi><mo>/</mo><mi>μm</mi></math></span>, an increment in a macroscopic emission current density <span><math><mrow><mo>(</mo><mi>J</mi><mo>)</mo></mrow></math></span> from <span><math><mn>6.587</mn><mo>→</mo><mn>46.426</mn><mspace></mspace><mi>mA</mi><mo>/</mo><msup><mi>cm</mi><mn>2</mn></msup></math></span>, and a field enhancement factor <span><math><mrow><mo>(</mo><mi>β</mi><mo>)</mo></mrow></math></span> enhanced from <span><math><mrow><mn>2478</mn><mo>→</mo><mn>3977</mn></mrow></math></span>, respectively. The decorated CNT field emitters meet orthodox field emission hypothesis criteria, suggesting their potential for vacuum electronic device applications.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118434"},"PeriodicalIF":3.9,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structure analysis and fluorescence properties of Ce3+ activated La2SrGa4Si2O14 langasite phosphor","authors":"Qijie Xiong ,&nbsp;Chun Liu ,&nbsp;Wensheng Li ,&nbsp;Zhenggang Zou ,&nbsp;Yijian Sun ,&nbsp;Jinsheng Liao ,&nbsp;Herui Wen ,&nbsp;Guoliang Gong","doi":"10.1016/j.mseb.2025.118439","DOIUrl":"10.1016/j.mseb.2025.118439","url":null,"abstract":"<div><div>The La₃Ga₅SiO₁₄ is a representative electro-optical material (A₃BC₃D₂O₁₄, <em>P</em>321) with disordered C and D sites. Theoretically, composition adjustment from La₃Ga₅SiO₁₄ to La₂SrGa₄Si₂O₁₄ can achieve shifting the disordered parts from double Ga, Si sites to the sole La site. In this study, Ce³⁺ doped isomorphic La₂SrGa₄Si₂O₁₄ (LSGS) phosphors with a more compact and ordered lattice than La₃Ga₅SiO₁₄ are prepared. The LSGS:Ce³⁺ samples show narrow purple-blue emission around 395 nm with higher quantum efficiency than that of the La₃Ga₅SiO₁₄:Ce³⁺. The LSGS:1.2 %Ce³⁺ exhibits highest fluorescence intensity with decaying lifetime of sub-10 ns The large Stokes shift reduces the overlap of the absorption and emission bands. The structural defects reflected by X-ray induced fluorescence is discussed. The potential of LSGS:Ce³⁺ as a kind of scintillator is preliminarily evaluated.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118439"},"PeriodicalIF":3.9,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144105293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The structural, electronic and optical properties of cation-disordered (LixNa1-x)2Te alloys","authors":"Qiao Wei ,&nbsp;Yuhang Deng ,&nbsp;Sixin Kang ,&nbsp;Liu Yang ,&nbsp;Shuaiwei Fan","doi":"10.1016/j.mseb.2025.118432","DOIUrl":"10.1016/j.mseb.2025.118432","url":null,"abstract":"<div><div>The properties of (Li_xNa_1-x)₂Te alloys are studied by using the hybrid functionals method. Obtained results indicate (Li_xNa_1-x)₂Te alloys are direct gap semiconductors. As the alloy composition changes, the band gap of the alloys exhibits a nonlinear variation with the bowing parameter (−0.78 eV). When the Li composition reaches 0.50, the hole (electron) effective mass of (Li_0.5Na_0.5)₂Te alloy reduces to 0.314 (0.233) <em>m</em>₀, indicating approximate 80.0 % decrease in hole. Moreover, the optical properties show (Li_0.5Na_0.5)₂Te alloy possess low absorptivity and reflectivity, together with excellent transmittance in the visible light region. The mixing enthalpies and elastic constants verify that (Li_xNa_1-x)₂Te alloy can be synthesized experimentally and possess mechanical stability under ambient environments. These findings highlight the potential of the (Li_0.5Na_0.5)₂Te alloy as a promising transparent conducting material.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118432"},"PeriodicalIF":3.9,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative study between conventional and nanomaterial-based methods for selective recovery of selenium/tellurium from copper anode slime","authors":"Ambikesh Soni ,&nbsp;Suresh Sundaramurthy ,&nbsp;Anil Kumar Sharma","doi":"10.1016/j.mseb.2025.118424","DOIUrl":"10.1016/j.mseb.2025.118424","url":null,"abstract":"<div><div>The selective recovery of valuable elements from copper anode slime represents a crucial approach to recycling and sustainability. While conventional methods such as oxidative roasting, leaching, and electrolytic refining have been widely adopted, they present disadvantages including high energy consumption, low selectivity, and environmental concerns. Nanomaterials have emerged as promising alternatives, offering enhanced selectivity and efficiency due to their high surface area, tunable properties, and specific interactions with metal ions. This study compares conventional and nanomaterial-based methodologies regarding their efficiency, cost implications, and environmental impacts. Traditional multi-step processes often compromise the purity of recovered elements, whereas functionalized nanoparticles and nanocomposites with their unique nanoscale surface interactions significantly enhance recovery rates and selectivity. Furthermore, this review evaluates the upscaling potential of nanotechnologies, highlighting comparative benefits of traditional methods while emphasizing substantial advancements through research and development. The ongoing evolution of nanomaterial-based technologies underscores the necessity for continued research and innovation to refine applications for selenium and tellurium recovery, ultimately leading to more efficient processing of copper anode slime.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118424"},"PeriodicalIF":3.9,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced UV protection and photocatalytic activity in Samarium and Europium co-doped TiO2 thin films: A durable solution for protective coatings","authors":"Ayesha Bhandari ,&nbsp;Ashish Kumar ,&nbsp;Kamni ,&nbsp;Manvi Rajput ,&nbsp;H.C. Swart ,&nbsp;Vinay Kumar","doi":"10.1016/j.mseb.2025.118429","DOIUrl":"10.1016/j.mseb.2025.118429","url":null,"abstract":"<div><div>This study explores Samarium (Sm³⁺)-doped and Europium-Samarium (Eu³⁺: Sm³⁺, 1:1) co-doped TiO₂ thin films for their potential as UV protective coatings. Thin films were fabricated via spin coating using sol–gel-derived powders dispersed in a PVA matrix, enabling uniform deposition on glass substrates. Powder X-ray diffraction (PXRD) analysis revealed that single-doped TiO₂ stabilized the anatase phase, while co-doping introduced some rutile content. With increasing doping concentration, the crystallite size decreased, remaining below 40 nm, which is advantageous for enhancing surface properties. Fourier-transform infrared (FTIR) spectroscopy confirmed the presence of characteristic Ti-O bond stretching vibrations at 430 cm⁻¹, consistent with the anatase phase of TiO₂ in all samples. UV–VIS spectroscopy showed strong light absorption below 400 nm and an indirect bandgap of about 3.74 eV, which means it can effectively absorb UV light. Excitation spectra showed a prominent absorption band in the 200–300 nm range, corresponding to intrinsic TiO₂ transitions (O²⁻→Ti⁴⁺). Emission spectra of Sm³⁺-doped TiO₂ exhibited peaks excited at 475 nm, attributed to ⁴G_5/2 → ⁶H_j (J = 5/2, 7/2, 9/2 and 11/2) transitions, while co-doped samples displayed maximum red emission at 612 nm, confirming the presence of both Sm³⁺ and Eu³⁺ ions. The films demonstrated superior UVB (280–320 nm) blocking efficiency (87 %) compared to UVB (320–400 nm) (34 %), as evidenced by transmission spectra. The photocatalytic performance evaluated via methylene blue (MB) dye degradation under UV irradiation indicated an inverse correlation between dye degradation and UV shielding. Durability tests measured under prolonged showed a slight increase (30–40 %) in transmittance within the 200–300 nm range but maintained stability at higher wavelengths. These findings support the efficiency of co-doped and doped TiO₂ thin layers to act as long-term, high-quality ultraviolet-blocking materials and are good applicants to be applied in protective coatings in various industries.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118429"},"PeriodicalIF":3.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neodymium-doped Co3O4 nanoparticles prepared via PVP-assisted Sol-gel method for improved visible-light photocatalytic activity","authors":"A.B. Vennela ,&nbsp;N. Senthilkumar ,&nbsp;K.V. Hemalatha","doi":"10.1016/j.mseb.2025.118386","DOIUrl":"10.1016/j.mseb.2025.118386","url":null,"abstract":"<div><div>Neodymium (Nd)-doped cobalt oxide nanoparticles were synthesized using the poly-assisted sol–gel method for photocatalytic activity. The phase purity and crystalline nature of the synthesized material were primarily confirmed through PXRD analysis. The optical UV–Visible spectroscopy provides linear decrease in band gap energy due to successful incorporation of Nd³⁺ ions into the Co₃O₄ lattice position. The recombination of electrons and holes are reduced by increasing the Nd³⁺ into Co₃O₄ as confirmed by PL spectroscopy. The spherical shaped morphology was noticed from the FESEM and TEM analysis. The average particle size of the Nd-doped Co₃O₄ nanoparticles were determined at the range of 10 to 150 nm. EDAX analysis reveals that the presence of Co, O and Nd demonstrating that neodymium ions are successfully doped into the Co₃O₄ NPs without impurities. The NdCo₃O₄-1 nanoparticles exhibited superior photodegradation performance of MB and RhB dyes under visible light irradiation compared to other catalysts. This enhanced activity can be attributed to the increased Nd doping concentration, which plays a crucial role in trapping charge carriers and preventing electron-hole pair recombination.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118386"},"PeriodicalIF":3.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural, optical and electrical properties of ZnO thin films deposited in the plane direction (002) by ultrasonic spray pyrolysis using nitrogen as carrier gas","authors":"E. Rincon-Suarez ,&nbsp;J.M. Mozo ,&nbsp;Anabel Romero-López ,&nbsp;S. Alcántara-Iniesta ,&nbsp;Francisco J. Flores-Ruiz ,&nbsp;L.E. Serrano","doi":"10.1016/j.mseb.2025.118430","DOIUrl":"10.1016/j.mseb.2025.118430","url":null,"abstract":"<div><div>Zinc oxide (ZnO) holds promise for diverse applications, particularly when deposited along the (002) crystalline plane, enhancing conductivity and transparency. This study examines the optical, electrical, structural, and morphological properties of ZnO films. Nitrogen and air as carrier gas to promoted (002) orientation, confirmed by X-ray diffraction (XRD), with an average crystallite size of 19 nm. The films exhibited high transmittance (&gt;80 %), a band gap of ∼ 3.17 eV, and grain sizes of ∼ 60 nm observed via scanning electron microscopy (SEM). Resistivity was 0.54 Ω cm, and energy dispersive spectroscopy (EDS) showed an atomic composition of ∼ 53 % oxygen and 47 % zinc.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118430"},"PeriodicalIF":3.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pore structure design of activated carbon microspheres by molten salt-assisted strategy for high energy density supercapacitors","authors":"Huan Xiangli,&nbsp;Baishan Liu,&nbsp;Yanli Wang,&nbsp;Liang Cheng,&nbsp;Liang Zhan,&nbsp;Yongzheng Zhang","doi":"10.1016/j.mseb.2025.118412","DOIUrl":"10.1016/j.mseb.2025.118412","url":null,"abstract":"<div><div>Porous carbon is one of the preferred electrode materials for supercapacitors. Herein, hierarchically porous activated carbon microspheres (PACSs) are prepared by molten salt-assisted carbonization and CO₂ activation. In this strategy, the molten NaCl acts as a supplier of high energy Cl^-, which is responsible for etching the skeleton of the carbon material and creating more defects for subsequent CO₂ activation to construct a hierarchically porous structure in the activated carbon spheres, providing a large specific surface area (2087 m² g⁻¹) and high porosity (77.8% mesoporosity). When assembled into symmetric supercapacitor, the PACSs electrode exhibited a specific capacitance of 123 F g⁻¹ at 0.1 A g⁻¹ in organic electrolyte. Moreover, the device can display excellent cycling performance with a capacitance retention of 93.1% after 10,000 cycles and a high energy density of 25.66 Wh kg⁻¹ (at 61.17 W kg⁻¹). This study pioneers a new strategy for constructing hierarchically porous structure in carbon materials for energy storage devices.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118412"},"PeriodicalIF":3.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Approach for Mitigating the effects of temperature and ITCs in GAA TFETs with a vertical tunneling design","authors":"Bokka Jagadeesh Babu ,&nbsp;Bhaskara Venkata Jagannadham Doddi","doi":"10.1016/j.mseb.2025.118427","DOIUrl":"10.1016/j.mseb.2025.118427","url":null,"abstract":"<div><div>This work proposes an innovative vertical tunneling GAA-VTFET design that enhances analog/AC performance by addressing interface trap effects and temperature variations. Integrating a heavily doped n + source pocket with GaP/Si heterojunction, the device achieves improved BTBT (band-to-band tunneling) efficiency, resulting in higher on-current and a reduced subthreshold slope (SS). The fully source surrounding gate structure enables line tunneling, providing enhanced gate control, while a gate-drain underlap and vertical configuration effectively suppress ambipolar and leakage currents, yielding a high on–off current ratio and compact footprint. DC analysis reveals optimal threshold voltage, high on–off ratio, and low SS, while AC performance metrics, including favourable transconductance, cutoff frequency, and gain-bandwidth product, underscore its suitability for RF and high-performance analog applications.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118427"},"PeriodicalIF":3.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing pseudocapacitive and OER-HER electrocatalytic potential of bimetallic Copper-Nickel/Graphene oxide nanocomposite","authors":"Kedar Sahoo ,&nbsp;Deepak Kumar ,&nbsp;Vishal K. Kushwaha ,&nbsp;Ajinkya Kotkar ,&nbsp;Arindam Indra ,&nbsp;Shirish H. Sonawane ,&nbsp;Suddhasatwa Basu","doi":"10.1016/j.mseb.2025.118425","DOIUrl":"10.1016/j.mseb.2025.118425","url":null,"abstract":"<div><div>Copper-nickel oxide/GO (CNO/GO) nanocomposite was synthesized via a low-temperature thermal reduction technique with crystallographic phase matching with an off-stoichiometric type Cu_0.05Ni_0.95O/GO structure. Three-electrode-based electrochemical experiments suggest that the prepared CNO/GO nanocomposite can store energy via the pseudocapacitive mechanism. The charge storage efficacy is also reflected in the high-power density value (∼267 W/kg) achieved at a current density of 1 A/g compared to earlier reported nickel oxide-based composites. The practical performance of the CNO/GO nanocomposite can be corroborated by the fact that in a symmetric coin cell device, it results in a specific capacity of ∼37F/g @ 1A/g and retains its ∼84 % specific capacity after 8000 cycles. The flexibility of using CNO/GO nanocomposite as an exceptional electrocatalytic material can be recognized from the smaller overpotential (η) values, e.g., 340 mV and 359 mV for OER and HER, respectively, in conjunction with chronoamperometric stability retained over 24 h. All these multiple electrochemical attributes establish the potential of using CNO/GO nanocomposite in energy storage and conversion.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"320 ","pages":"Article 118425"},"PeriodicalIF":3.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}