Journal of Science: Advanced Materials and Devices最新文献

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Preparation and investigation of structural, optical, and dielectric properties of PVA/PVP blend films boosted by MWCNTs/AuNPs for dielectric capacitor applications 制备和研究用于电介质电容器应用的由 MWCNTs/AuNPs 助长的 PVA/PVP 混合薄膜的结构、光学和介电性质
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-10-09 DOI: 10.1016/j.jsamd.2024.100802
Abdu Saeed , Amal Mohsen Alghamdi , Maha Aiiad Alenizi , Reem Alwafi , G.M. Asnag , Eman Alzahrani , Randa A. Althobiti , Ahmed N. Al-Hakimi , Aeshah Salem , S.A. Al-Ghamdi
{"title":"Preparation and investigation of structural, optical, and dielectric properties of PVA/PVP blend films boosted by MWCNTs/AuNPs for dielectric capacitor applications","authors":"Abdu Saeed ,&nbsp;Amal Mohsen Alghamdi ,&nbsp;Maha Aiiad Alenizi ,&nbsp;Reem Alwafi ,&nbsp;G.M. Asnag ,&nbsp;Eman Alzahrani ,&nbsp;Randa A. Althobiti ,&nbsp;Ahmed N. Al-Hakimi ,&nbsp;Aeshah Salem ,&nbsp;S.A. Al-Ghamdi","doi":"10.1016/j.jsamd.2024.100802","DOIUrl":"10.1016/j.jsamd.2024.100802","url":null,"abstract":"<div><div>With the rising global energy demands, there is a pressing need for the invention of efficient and reliable energy storage systems. This research centers on the creation and analysis of flexible dielectric capacitors composed of polymer nanocomposites (PNCs), incorporating a blend of polyvinyl alcohol (PVA) and polyvinyl pyrrolidone (PVP) as the base polymer, with multi-walled carbon nanotubes (MWCNTs) and gold nanoparticles (AuNPs) serving as nanofillers. The AuNPs were produced through an environmentally friendly synthesis method. Films made from PVA/PVP blended with MWCNTs and AuNPs were fabricated using the casting approach. Various characterization methods, including TEM, XRD, FTIR, and UV–Vis spectroscopy, were utilized to evaluate the samples. A detailed analysis of their electrical/dielectric characteristics was conducted. XRD analysis revealed a significant decrease in crystallinity from 55% for the pure PVA/PVP blend to 37% for the 1.6 wt% nanofiller composite, indicating increased amorphous content, which facilitates better ion mobility. FTIR confirmed strong interactions between the polymer matrix and nanofillers, with intensified vibrational peaks pointing to enhanced molecular dynamics. UV–Vis spectroscopy demonstrated a red shift in the absorption edge, and Tauc plot analysis showed a reduction in the indirect/direct optical band gap from 4.84 eV/5.68 eV for the pure blend to 4.26/5.35 eV for the nanocomposite with 1.6 wt% nanofillers. The addition of nanofillers resulted in improvements in their dielectric features, which exhibited a significant performance improvement, with the dielectric constant (<em>ε</em>′) reaching approximately 1100 at low frequency for the 1.6 wt% nanofiller sample, compared to 9 for the pure blend. Additionally, the dielectric loss (<em>ε</em>'') and tangent loss (tan δ) were reduced, with tan δ showing a decrease from 15 for the pure blend to 2 for the 1.6 wt% nanofiller composite at low frequency, indicating enhanced dielectric efficiency and reduced energy dissipation. The capacitors' functionality was assessed through capacitance-frequency and conductance-frequency analyses. The capacitors exhibited stable high capacitance across a broad frequency spectrum, making them alternatives for energy storage solutions.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100802"},"PeriodicalIF":6.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Triton X-100 surfactant concentration on the wettability of polyethylene-based separators used in supercapacitors Triton X-100 表面活性剂浓度对超级电容器所用聚乙烯基分离器润湿性的影响
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-10-09 DOI: 10.1016/j.jsamd.2024.100801
S.M.B. Dissanayake , I.G.K.J. Wimalasena , N.M. Keppetipola , B.C. Karunarathne , A.D.T. Medagedara , Ludmila Cojocaru , Satoshi Uchida , R.M.G. Rajapakse , Kirthi Tennakone , Masamichi Yoshimura , G.R.A. Kumara
{"title":"Effect of Triton X-100 surfactant concentration on the wettability of polyethylene-based separators used in supercapacitors","authors":"S.M.B. Dissanayake ,&nbsp;I.G.K.J. Wimalasena ,&nbsp;N.M. Keppetipola ,&nbsp;B.C. Karunarathne ,&nbsp;A.D.T. Medagedara ,&nbsp;Ludmila Cojocaru ,&nbsp;Satoshi Uchida ,&nbsp;R.M.G. Rajapakse ,&nbsp;Kirthi Tennakone ,&nbsp;Masamichi Yoshimura ,&nbsp;G.R.A. Kumara","doi":"10.1016/j.jsamd.2024.100801","DOIUrl":"10.1016/j.jsamd.2024.100801","url":null,"abstract":"<div><div>Polyethylene-based separators are generally unsuitable for aqueous supercapacitors due to their poor wettability with the electrolyte, which impedes ion transport. However, incorporating Triton X-100 (2-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]ethanol) into the aqueous sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) electrolyte improves the wettability of polyethylene and facilitates ionic movement through its pores. In this study, Triton X-100 was added to 1.0 M H<sub>2</sub>SO<sub>4</sub> at various concentrations (0.122%–1.210% V/V) to evaluate its impact on supercapacitor performance. Supercapacitors were assembled using activated carbon-filled carbon cloth electrodes, each of the above electrolytes and polyethylene sheet separators. Scanning electron microscopy revealed that the carbon cloth exhibited a uniform fiber distribution and high surface area for activated carbon integration. The polyethylene separator displayed a porous structure with an average pore size of 165 ± 35 nm. Triton X-100 significantly reduced the water contact angle from 101.5° (without surfactant) to 30.2° (with 1.21% V/V Triton X-100), enhancing polyethylene’s wettability. This change from hydrophobic to hydrophilic characteristics enabled the formation of an electrical double layer at the separator/electrolyte interface, improving ionic transport. However, higher Triton X-100 concentrations increased the electrolyte's viscosity, which impeded ion movement. The highest specific capacitance of 55.3 F/g (at a scan rate of 0.005 V s<sup>−1</sup>) was achieved with 0.488% V/V Triton X-100. The specific capacitance varied with surfactant concentration in a complex manner, influenced by micelle formation and precipitation. These findings were corroborated by cyclic voltammetry and AC impedance spectroscopy.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100801"},"PeriodicalIF":6.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142534616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Explorations of mechanical and corrosion resistance properties of AA6063/TiB2/Cr2O3 hybrid composites produced by stir casting 搅拌铸造法生产的 AA6063/TiB2/Cr2O3 混合复合材料的力学性能和耐腐蚀性能探索
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-09-26 DOI: 10.1016/j.jsamd.2024.100790
Rami Alfattani, Mohammed Yunus
{"title":"Explorations of mechanical and corrosion resistance properties of AA6063/TiB2/Cr2O3 hybrid composites produced by stir casting","authors":"Rami Alfattani,&nbsp;Mohammed Yunus","doi":"10.1016/j.jsamd.2024.100790","DOIUrl":"10.1016/j.jsamd.2024.100790","url":null,"abstract":"<div><div>Mechanical and Corrosion characteristics of composite materials made from Aluminum alloys (AA) 6063 supplanting as the material of choice for automotive, aerospace, and marine applications by systematically varying ceramic reinforcements developed through controlled stir cast technique ensuring uniform dispersion are explored. The hardness, density, impact and tensile strength, corrosion resistance, and microstructural characteristics of Aluminum Matrix Composites (AMCs) reinforced with titanium diboride (TiB<sub>2</sub>) at 7.5, 10, and 12.5 wt% and chromium oxide (Cr<sub>2</sub>O<sub>3</sub>) at 3, 6, and 9 wt% were assessed according to ASTM standards. The microstructural analysis revealed a reduction in the growth of reinforcement clusters within acceptable limits. The addition of reinforcements to the matrix resulted in improved tensile strength, ranging from 124.6 to 188.7 MPa, and hardness, increasing from 71.5 to 144.32 VHN. This improvement is attributed to the strengthening or load transfer mechanism facilitated by the reinforcements. Additionally, the impact strength of the composites increased from 11.845 to 21.16 J, while the density showed slight variations. Consistent corrosion tests demonstrated that the chemical and interfacial interactions between the matrix material and the reinforcements significantly enhanced the corrosion resistance, reducing the corrosion rate from 570 to 499 mm/year.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100790"},"PeriodicalIF":6.7,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel stearic acid/expanded graphite/Fe3O4 composite phase change material with effective photo/electro/magneto-triggered thermal conversion and storage for thermotherapy applications 一种新型硬脂酸/膨胀石墨/Fe3O4 复合相变材料,可在热疗应用中实现有效的光电/磁触发热转换和热存储
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-09-21 DOI: 10.1016/j.jsamd.2024.100792
Giang Tien Nguyen , Nhung Tran Thi , Nguyen Thanh Nho , Le Thi Duy Hanh , Huynh Nguyen Anh Tuan
{"title":"A novel stearic acid/expanded graphite/Fe3O4 composite phase change material with effective photo/electro/magneto-triggered thermal conversion and storage for thermotherapy applications","authors":"Giang Tien Nguyen ,&nbsp;Nhung Tran Thi ,&nbsp;Nguyen Thanh Nho ,&nbsp;Le Thi Duy Hanh ,&nbsp;Huynh Nguyen Anh Tuan","doi":"10.1016/j.jsamd.2024.100792","DOIUrl":"10.1016/j.jsamd.2024.100792","url":null,"abstract":"<div><div>Composite phase change materials (CPCMs) have demonstrated high potential in thermotherapy; however, their poor energy conversion limits thermal−charge performance, thus negatively affecting their practical applications. Herein, we combined stearic acid (SA), expanded graphite (EG), and Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) to obtain an 80 wt% SA/EG/Fe<sub>3</sub>O<sub>4</sub> CPCM with multisource−triggered thermal conversion and storage abilities. The CPCM was equipped with a photothermal conversion facilitated by high light absorption of EG and localized surface plasmon resonance of Fe<sub>3</sub>O<sub>4</sub>. The high electrical conductivity of EG also offered the CPCM with an effective electrothermal conversion. An accelerated magnetothermal conversion was further achieved for the CPCM owing to the superparamagnetism of Fe<sub>3</sub>O<sub>4</sub> NPs. Resultantly, the 80 wt% SA/EG/Fe<sub>3</sub>O<sub>4</sub> CPCM could be facily charged as applied with either low−energy electricity (2.0 V), actual sunlight radiation (98−110 mW/cm<sup>2</sup>), or alternating magnetic field (120 W). In addition, it exhibited relatively high thermal storage capacity (152.4 J/g), excellent leakage resistance, and high thermal stability, conductivity, and cycling reliability. As in the form of a heat pack, the 80 wt% SA/EG/Fe<sub>3</sub>O<sub>4</sub> CPCM maintained a heat release to a human back within 50–52 °C for 34 min, overtaking the criteria for high−temperature thermotherapy. The proposed multisource−triggered thermal conversion abilities and suitable thermal properties made SA/EG/Fe<sub>3</sub>O<sub>4</sub> CPCM promising for multiple energy utilization and practical thermotherapy applications.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100792"},"PeriodicalIF":6.7,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Control of tungsten-epoxy composite porosity prepared using a high-energy ball milling method: An engineering aspect of backing layer fabrication 利用高能球磨法控制钨-环氧树脂复合材料的孔隙率:背层制造的工程学方面
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-09-20 DOI: 10.1016/j.jsamd.2024.100793
Darmawan Hidayat , Setianto Setianto
{"title":"Control of tungsten-epoxy composite porosity prepared using a high-energy ball milling method: An engineering aspect of backing layer fabrication","authors":"Darmawan Hidayat ,&nbsp;Setianto Setianto","doi":"10.1016/j.jsamd.2024.100793","DOIUrl":"10.1016/j.jsamd.2024.100793","url":null,"abstract":"<div><div>Tungsten-epoxy composite is commonly used as a backing layer substrate of piezoelectric-based ultrasonic transducers. The physical properties of this composite, such as porosity, play a significant role in controlling the behavior and specifications of transducer fabrication. Therefore, this study aimed to investigate the effects of tungsten content in epoxy to control porosity and determine the engineering aspects of ultrasonic transducer fabrication. The experiment was conducted using a shaker-type high-energy ball milling method, where non-spherical and faceted tungsten particles with a mean size of 1 μm were composited into epoxy resin as a matrix at various tungsten-epoxy weight ratios of 0:1 to 10:1. The prepared composite surface morphological and elemental, tungsten loading, particles, and epoxy bonding were examined and analyzed. Furthermore, analysis was carried out on the relationship between tungsten content and the parameters corresponding to the composite acoustic characteristics, such as sound velocity, acoustic attenuation, and acoustic impedance. The results showed that composite porosity increased in the range of 12.40–31.87%, corresponding to acoustic impedance from 3.04 to 9.37 Mrayl (below 10 Mrayl for biomedical ultrasonic transducers) when the tungsten-epoxy weight ratio varied from 0:1 to 10:1. This showed the significant influence of tungsten particle loading on controlling porosity of tungsten-epoxy composite by precisely tuning the weight ratio, contributing to engineering process in the fabrication. In conclusion, porosity was adjusted by controlling the tungsten loading content in epoxy.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100793"},"PeriodicalIF":6.7,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetic iron-based nanoparticles encapsulated in graphene/reduced graphene oxide: Synthesis, functionalization and cytotoxicity tests 封装在石墨烯/还原氧化石墨烯中的磁性铁基纳米粒子:合成、功能化和细胞毒性测试
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-09-14 DOI: 10.1016/j.jsamd.2024.100776
Aysa Azmoudeh , Sencer Moral , Seyma Sari , Miray Türk , Muhammet U. Kahveci , Gizem Dinler Doganay , Duygu Ağaoğulları
{"title":"Magnetic iron-based nanoparticles encapsulated in graphene/reduced graphene oxide: Synthesis, functionalization and cytotoxicity tests","authors":"Aysa Azmoudeh ,&nbsp;Sencer Moral ,&nbsp;Seyma Sari ,&nbsp;Miray Türk ,&nbsp;Muhammet U. Kahveci ,&nbsp;Gizem Dinler Doganay ,&nbsp;Duygu Ağaoğulları","doi":"10.1016/j.jsamd.2024.100776","DOIUrl":"10.1016/j.jsamd.2024.100776","url":null,"abstract":"<div><p>Nanomaterials for suitable particle sizes, shapes, surface properties, biocompatibility, magnetic properties, and chemical stability are candidates for biomedical applications. Among these nanomaterials, iron-based ones are highly interested in their morphological and magnetic properties for potential utilizations in biomedicine. However, iron-based nanoparticles lose their chemical stability in body fluids because of their oxide formations and transformations. Their use in biomedical applications, especially in imaging, may be less effective if they are oxidized and have lower magnetization values. Thus, the idea of coating them with a protective layer has recently emerged to prevent magnetic nanoparticles from degrading in human fluids and losing their magnetic properties. However, the biological effects of these coated nanoparticles on human cells are poorly understood. In this paper, the synthesis of multilayer graphene (MLG) encapsulated iron-based nanoparticles was investigated by solvothermal and chemical vapor deposition (CVD) methods followed by purification. Subsequently, their surface modification was conducted with pyrene end-functional POEGMA obtained by atom transfer radical polymerization (ATRP). Cytotoxicities of synthesized nanoparticles were evaluated in MCF7 cell lines, which is a commonly used model for breast cancer research. We also compare the results with those obtained from bare iron oxide nanoparticles (IONPs) and iron oxides that were embedded in reduced graphene oxide (rGO) or partially coated with it. We aim to evaluate the safety and efficiency of these nanoparticles and increase their chemical stability as a multifunctional nano platform for cancer diagnosis and treatment. Characterization techniques such as XRD, XPS, SEM, TEM, DTA/TG, DLS, zeta potential, BET, NMR, FTIR, and VSM were performed on the nanoparticles. Cytotoxicity assessments on MCF-7 cell lines indicated the potential of these graphene-based magnetic nanoparticles for biomedical applications, particularly drug delivery, due to their small size, soft ferromagnetic properties, high chemical stability, and cytocompatibility at concentrations below 500 μg/mL over short incubation times.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100776"},"PeriodicalIF":6.7,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924001072/pdfft?md5=9440feb558f8fba05ea6a0a0da3668ca&pid=1-s2.0-S2468217924001072-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The flow stress prediction of TiB2/2024 aluminum matrix composites based on modified Arrhenius model and gene expression programming model 基于修正阿伦尼斯模型和基因表达编程模型的 TiB2/2024 铝基复合材料流动应力预测
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-09-14 DOI: 10.1016/j.jsamd.2024.100777
Jing Wang, Qiang Liang, Yan Li
{"title":"The flow stress prediction of TiB2/2024 aluminum matrix composites based on modified Arrhenius model and gene expression programming model","authors":"Jing Wang,&nbsp;Qiang Liang,&nbsp;Yan Li","doi":"10.1016/j.jsamd.2024.100777","DOIUrl":"10.1016/j.jsamd.2024.100777","url":null,"abstract":"<div><p>The high temperature flow data of TiB<sub>2</sub>/2024 aluminum matrix composites (referred to as TiB<sub>2</sub>/2024 alloy) was investigated using a Gleeble-3500 thermal simulation testing machine. The experiments were conducted at various deformation temperatures (573 K, 623 K, 673 K, and 723 K), strain rates (0.01s<sup>−1</sup>, 0.1s<sup>−1</sup>, 1s<sup>−1</sup>, and 10s<sup>−1</sup>), and a maximum deformation of 60%. By comprehensively accounting for the deformation conditions, the relationships between the material parameters <em>α</em>, <em>n</em>, <em>S</em>, <em>f</em> of TiB<sub>2</sub>/2024 alloy and the deformation temperature, strain, and strain rate were determined, leading to the modification of the Arrhenius model. A constitutive model for TiB<sub>2</sub>/2024 alloy was constructed using the Gene expression programming (GEP) approach. The flow stress of TiB<sub>2</sub>/2024 alloy during the compression process was predicted using both the modified Arrhenius model and the GEP model. The statistical analysis was performed to evaluate the prediction accuracy of the two models, and the extended stress-strain data was implemented in finite element simulations of the hot compression process. The results indicate that the flow stress of TiB<sub>2</sub>/2024 alloy is significantly affected by the strain rate and temperature during the deformation process. The flow stress decreases with increasing temperature and increases with increasing strain rate. Both the modified Arrhenius model and the GEP model can effectively predict the alloy's flow stress. However, the modified Arrhenius model exhibits greater prediction accuracy than the GEP model.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100777"},"PeriodicalIF":6.7,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924001084/pdfft?md5=652fe7d25dd78fd3f643841d7528693a&pid=1-s2.0-S2468217924001084-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Power enhancement of vibration energy harvesters by way of magnetic flux gradient analysis of electromagnetic induction 通过电磁感应的磁通梯度分析增强振动能量收集器的功率
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-09-10 DOI: 10.1016/j.jsamd.2024.100791
Hak-Jun Lee , Jinsoo Yang , Dahoon Ahn
{"title":"Power enhancement of vibration energy harvesters by way of magnetic flux gradient analysis of electromagnetic induction","authors":"Hak-Jun Lee ,&nbsp;Jinsoo Yang ,&nbsp;Dahoon Ahn","doi":"10.1016/j.jsamd.2024.100791","DOIUrl":"10.1016/j.jsamd.2024.100791","url":null,"abstract":"<div><p>This study proposes strategies to enhance the conversion of mechanical energy to electrical energy in cylindrical electromagnetic induction-type vibration energy harvesters (VEH) using disc or ring-shaped magnets and ring-shaped coils. The rationale behind these strategies has been substantiated by an analysis of magnetic flux gradients based on simulations. In particular, the utilization of a repulsive magnet pair and a yoke has been proposed to maximize the magnetic flux gradient at the coil winding position by manipulating the magnetic flux path. Simulation results confirm that the use of a yoke can produce a nearly 5.8-fold increase in power consumption at the external load. Additionally, the study demonstrates that the positioning and thickness settings of the coil are critical for improving the electrical output based on the spatial distribution of the magnetic flux gradient. Within the same magnet topology, points where power generation is not feasible due to a zero magnetic flux gradient are identified, besides a nearly 5.3-fold increase in observed power generation depending on coil placement. Given the structural feasibility of VEH implementation, a design for a moving magnet VEH utilizing ring magnets with a yoke enclosure is proposed, demonstrating that it can generate power at nearly 85% of the level attributed to using disc magnets.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100791"},"PeriodicalIF":6.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924001229/pdfft?md5=7b46cd8a41f6feec1ff1fbe09e7ccbb7&pid=1-s2.0-S2468217924001229-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Visible light-driven Synergetic antimicrobial activity of Cu2O quantum dots and electrospun PAN/PCL nanofiber matrix 可见光驱动的 Cu2O 量子点与电纺 PAN/PCL 纳米纤维基质的协同抗菌活性
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-08-22 DOI: 10.1016/j.jsamd.2024.100779
Farhan Aryo Hutomo , Azzah Dyah Pramata , Febriyansyah Saputra , Paundra Rizky Pratama , Taras Genovievo De Yonarosa , Amaliya Rasyida , Widyastuti , Sutarsis , Nur Laila Hamidah
{"title":"Visible light-driven Synergetic antimicrobial activity of Cu2O quantum dots and electrospun PAN/PCL nanofiber matrix","authors":"Farhan Aryo Hutomo ,&nbsp;Azzah Dyah Pramata ,&nbsp;Febriyansyah Saputra ,&nbsp;Paundra Rizky Pratama ,&nbsp;Taras Genovievo De Yonarosa ,&nbsp;Amaliya Rasyida ,&nbsp;Widyastuti ,&nbsp;Sutarsis ,&nbsp;Nur Laila Hamidah","doi":"10.1016/j.jsamd.2024.100779","DOIUrl":"10.1016/j.jsamd.2024.100779","url":null,"abstract":"<div><p>This work reported a successful observation of the synergistic rapid antibacterial activity of the Electrospun PAN/PCL Nanofiber (NF) with Cuprous Oxide -based Quantum Dots (QDs). Our findings reveal that the NF-QDs nanostructure exhibits excellent antibacterial activity that eliminated more than 98% of antimicrobial-resistant bacteria in 30 s under visible light. The characterization including X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), UV–Vis spectrophotometer (UV–Vis), Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), Brunauer-Emmet-Teller (BET) analysis exhibits good physicochemical properties of both synthesized quantum dots and nanofiber. A desired hydrophobic NF with an average surface roughness of 219.40 nm and 243.46 nm for NF–Cu2O and NF–Cu<sub>2</sub>O/TiO<sub>2</sub> was achieved with an average diameter of 502.54 nm and 343.02 nm, respectively. The antibacterial activity was tested against antibiotics-resistance strains, Klebsiella pneumoniae and Methicillin-resistant Staphylococcus aureus, as well as non-resistance strains, Escherichia coli and Staphylococcus aureus. Our results indicate the promising potential of NF-QDs as antibacterial fabric to halt antibiotic resistance infections and mitigate outbreaks in various sectors.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100779"},"PeriodicalIF":6.7,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924001102/pdfft?md5=64193dcf1e72653c5df7b7dec6fd1b22&pid=1-s2.0-S2468217924001102-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Printing of passive RFID tag antennas on flexible substrates for long read distance applications: Materials and techniques 在柔性基板上打印无源 RFID 标签天线,用于长读取距离应用:材料与技术
IF 6.7 3区 材料科学
Journal of Science: Advanced Materials and Devices Pub Date : 2024-08-22 DOI: 10.1016/j.jsamd.2024.100778
Mohd Nizar Hamidon , Tark D. Farnana , Intan H. Hasan , Aduwati Sali , Maryam Md. Isa
{"title":"Printing of passive RFID tag antennas on flexible substrates for long read distance applications: Materials and techniques","authors":"Mohd Nizar Hamidon ,&nbsp;Tark D. Farnana ,&nbsp;Intan H. Hasan ,&nbsp;Aduwati Sali ,&nbsp;Maryam Md. Isa","doi":"10.1016/j.jsamd.2024.100778","DOIUrl":"10.1016/j.jsamd.2024.100778","url":null,"abstract":"<div><p>Radio frequency identification (RFID) is an emerging technology that has a crucial role in many areas. To be suitable for these applications, RFID tags must be flexible, which presents greater manufacturing challenges. Printing as an additive manufacturing method is preferred over subtractive processes due to its efficient use of materials and environmental friendliness. This review presents key properties of the printed patterns, namely electrical conductivity, layer thickness, and surface morphology. It links them to the reading distance between the RFID tag and the reader. The types of conductive inks and their role in achieving a long-read distance of flexible antennas are also discussed. The properties of flexible substrates linked to the printing process are also presented. These substrates were classified into paper, polymer, and textiles. This article considers two laboratory-scale printing techniques commonly used in research: inkjet and screen printing. The printing parameters of these printing techniques that affect the printing quality are covered. Furthermore, electroless plating is presented as a metallization process or a complementary method to other printing techniques.</p></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"9 4","pages":"Article 100778"},"PeriodicalIF":6.7,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2468217924001096/pdfft?md5=b059112ef210614a30a49feb720c54ca&pid=1-s2.0-S2468217924001096-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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