Fast, sensitive, and low-cost high-performance detectors have gradually become an indispensable tool for people to keep healthy, and sensors are the key devices of detection equipment. In this work, a ZnO nanocrystal modified carbon fiber electrode was prepared using a hydrothermal method, and on this basis, a galvanostatic point deposition method was used to load copper nanoparticles to prepare a sensor electrode. Scanning electron microscopy and X-ray diffraction were used to comprehensively analyze composition, morphology, and environmental adaptability of the prepared electrodes. The DPV test was used to verify the enhanced effect of ZnO nanorods on neurotransmitter detection. The ZnO/CF showed an obvious electrical signal (0.22 V, 4×10-5A) in the detection of dopamine (DA) solution, and the Cu-NPs/ZnO/CF also showed excellent detection results in the glucose detection experiment., providing two excellent examples for the development of low-cost electrochemical sensors. The electrodes can specifically detect DA in the presence of ascorbic acid and uric acid, and the detection limit of the electrode for detecting DA is about 0.4 μM. In addition, the Cu-NPs/ZnO/CF electrode successfully realized the enzyme-free detection of glucose, and the detection limit could reach 0.5 μM.
快速、灵敏、低成本的高性能检测仪已逐渐成为人们保持健康不可或缺的工具，而传感器则是检测设备中的关键器件。本研究采用水热法制备了氧化锌纳米晶改性碳纤维电极，并在此基础上采用电静电点沉积法负载纳米铜粒子制备了传感器电极。利用扫描电子显微镜和 X 射线衍射技术全面分析了所制备电极的成分、形貌和环境适应性。利用 DPV 试验验证了氧化锌纳米棒对神经递质检测的增强效果。ZnO/CF 在多巴胺（DA）溶液检测中显示出明显的电信号（0.22 V，4×10-5A），Cu-NPs/ZnO/CF 在葡萄糖检测实验中也显示出良好的检测效果，为开发低成本电化学传感器提供了两个很好的范例。该电极能在抗坏血酸和尿酸存在的情况下特异性地检测 DA，检测 DA 的电极检测限约为 0.4 μM。此外，Cu-NPs/ZnO/CF 电极还成功实现了葡萄糖的无酶检测，检测限达到 0.5 μM。
{"title":"Convenient and Accurate Detection of Dopamine and Glucose by Modifying Carbon Fiber Electrodes","authors":"Fengjin Han, Xiaoyan Zhang, Zijian Li, Haowei Sun, Hua Yuan, Xiaoyu Huang","doi":"10.1149/2162-8777/ad628b","DOIUrl":"https://doi.org/10.1149/2162-8777/ad628b","url":null,"abstract":"\u0000 Fast, sensitive, and low-cost high-performance detectors have gradually become an indispensable tool for people to keep healthy, and sensors are the key devices of detection equipment. In this work, a ZnO nanocrystal modified carbon fiber electrode was prepared using a hydrothermal method, and on this basis, a galvanostatic point deposition method was used to load copper nanoparticles to prepare a sensor electrode. Scanning electron microscopy and X-ray diffraction were used to comprehensively analyze composition, morphology, and environmental adaptability of the prepared electrodes. The DPV test was used to verify the enhanced effect of ZnO nanorods on neurotransmitter detection. The ZnO/CF showed an obvious electrical signal (0.22 V, 4×10-5A) in the detection of dopamine (DA) solution, and the Cu-NPs/ZnO/CF also showed excellent detection results in the glucose detection experiment., providing two excellent examples for the development of low-cost electrochemical sensors. The electrodes can specifically detect DA in the presence of ascorbic acid and uric acid, and the detection limit of the electrode for detecting DA is about 0.4 μM. In addition, the Cu-NPs/ZnO/CF electrode successfully realized the enzyme-free detection of glucose, and the detection limit could reach 0.5 μM.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141654998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-11DOI: 10.1149/2162-8777/ad5588
R. Pavithra Guru
Electronic devices for advanced modern semiconductor based technology, mainly focus on the design regarding lighter, faster and more affordable solutions to meet the specifications of modern digital electronics. Some of the drawbacks for minimizing device size in MOSFET include gate insulator scaling, Short-Channel Effects (SCEs), shallow junction technology and off-state leakage current in MOSFET devices. In addition, the traditional SiO2 as a dielectric material contains restricted maximum capacitance as well as increased tunnel current leakage due to the thickness. Hence, a High-k dielectric is required to replace SiO2 to overcome the mentioned issues. In this model, the N-type MOSFET is designed based on the bi-layer high K-dielectric medium with optimized thickness according to the maximum capacitance and minimum threshold voltage, which are implemented on VLSI based applications such as 6 T SRAM for evaluating the performance. The drain current of HfO2, Al2O3 and HfO2+Si3N4 for 2.5 v drain voltage are 1.87 mA, 1.51 mA and 3.54 mA. Then, the read and write delay of the single and bi-layer MOSFET are 70.84 ps, 82.64 ps, 95.21 ps and 10.24 ps, 15.47 ps, 21.74 ps. Thus, the designed and simulated bi-layer optimized high k- dielectric medium for N-MOSFET with wild horse optimization performs better electrical characteristics than the single layer dielectric medium MOSFET.
基于先进的现代半导体技术的电子器件，主要侧重于设计更轻、更快、更经济的解决方案，以满足现代数字电子技术的规格要求。最大限度缩小 MOSFET 器件尺寸的一些缺点包括栅极绝缘体缩放、短沟道效应 (SCE)、浅结技术和 MOSFET 器件的离态漏电流。此外，传统的二氧化硅（SiO2）电介质材料的最大电容受到限制，而且由于厚度问题，隧道电流泄漏也会增加。因此，需要一种高介电材料来替代二氧化硅，以克服上述问题。在这个模型中，N 型 MOSFET 是基于双层高 K 介电介质设计的，其厚度根据最大电容和最小阈值电压进行了优化。在 2.5 v 漏极电压下，HfO2、Al2O3 和 HfO2+Si3N4 的漏极电流分别为 1.87 mA、1.51 mA 和 3.54 mA。单层和双层 MOSFET 的读写延迟分别为 70.84 ps、82.64 ps、95.21 ps 和 10.24 ps、15.47 ps、21.74 ps。因此，与单层介质 MOSFET 相比，设计和仿真的野马优化 N-MOSFET 双层高 k 介质具有更好的电气特性。
{"title":"Design and Simulation of Bi-Layer Optimized High K- Dielectric Medium for N-Mosfet with Wild Horse Optimization to Improve Electrical Characteristics","authors":"R. Pavithra Guru","doi":"10.1149/2162-8777/ad5588","DOIUrl":"https://doi.org/10.1149/2162-8777/ad5588","url":null,"abstract":"Electronic devices for advanced modern semiconductor based technology, mainly focus on the design regarding lighter, faster and more affordable solutions to meet the specifications of modern digital electronics. Some of the drawbacks for minimizing device size in MOSFET include gate insulator scaling, Short-Channel Effects (SCEs), shallow junction technology and off-state leakage current in MOSFET devices. In addition, the traditional SiO2 as a dielectric material contains restricted maximum capacitance as well as increased tunnel current leakage due to the thickness. Hence, a High-k dielectric is required to replace SiO2 to overcome the mentioned issues. In this model, the N-type MOSFET is designed based on the bi-layer high K-dielectric medium with optimized thickness according to the maximum capacitance and minimum threshold voltage, which are implemented on VLSI based applications such as 6 T SRAM for evaluating the performance. The drain current of HfO2, Al2O3 and HfO2+Si3N4 for 2.5 v drain voltage are 1.87 mA, 1.51 mA and 3.54 mA. Then, the read and write delay of the single and bi-layer MOSFET are 70.84 ps, 82.64 ps, 95.21 ps and 10.24 ps, 15.47 ps, 21.74 ps. Thus, the designed and simulated bi-layer optimized high k- dielectric medium for N-MOSFET with wild horse optimization performs better electrical characteristics than the single layer dielectric medium MOSFET.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this article, we investigate the effects of gate and drain field plates and isosceles trapezoidal-shaped multi-finger structures on the characteristics of high current p-GaN-gated high-electron-mobility transistors (HEMTs). By optimizing the lengths of gate and drain field plates, the p-GaN-gated HEMTs with 200 μm have a breakdown voltage of 1893 V, a specific on-resistance of 7.0 mΩ-cm2, and a Baliga figure of merit (BFOM) value of 511 MW/cm2. Using the optimized isosceles trapezoidal-shaped multi-finger metallization on the source and drain, the p-GaN-gated HEMT with a 100 mm gate width can reach a current of 2.3 A. Combining all the optimum parameters of field plates and isosceles trapezoidal-shaped multi-finger, the fabricated 600 mm p-GaN-gated HEMT exhibits an output current of 18 A, an on-resistance of 0.7 Ω, and a breakdown voltage of 1020 V. Furthermore, the device also exhibits good thermal stability at high temperatures. These results demonstrate the potential and advantages of p-GaN-gated HEMT for power applications.
{"title":"18 A/1020 V p-GaN-gated HEMTs with Isosceles Trapezoidal-Shaped Multi-Finger Structure","authors":"Yu-Jun Lai, Dian-Ying Wu, Ya-Han Yang, Yu-Chen Liu, Cheng-Yeu Wu, Meng-Chyi Wu","doi":"10.1149/2162-8777/ad620e","DOIUrl":"https://doi.org/10.1149/2162-8777/ad620e","url":null,"abstract":"\u0000 In this article, we investigate the effects of gate and drain field plates and isosceles trapezoidal-shaped multi-finger structures on the characteristics of high current p-GaN-gated high-electron-mobility transistors (HEMTs). By optimizing the lengths of gate and drain field plates, the p-GaN-gated HEMTs with 200 μm have a breakdown voltage of 1893 V, a specific on-resistance of 7.0 mΩ-cm2, and a Baliga figure of merit (BFOM) value of 511 MW/cm2. Using the optimized isosceles trapezoidal-shaped multi-finger metallization on the source and drain, the p-GaN-gated HEMT with a 100 mm gate width can reach a current of 2.3 A. Combining all the optimum parameters of field plates and isosceles trapezoidal-shaped multi-finger, the fabricated 600 mm p-GaN-gated HEMT exhibits an output current of 18 A, an on-resistance of 0.7 Ω, and a breakdown voltage of 1020 V. Furthermore, the device also exhibits good thermal stability at high temperatures. These results demonstrate the potential and advantages of p-GaN-gated HEMT for power applications.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141655536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-11DOI: 10.1149/2162-8777/ad620d
H. A. Alburaih, M. Zia Ur Rehman, M. U. Saeed, N. A. Noor, M. S. H.-E, Dr. Yasir Saeed
The results show that all the studied semiconductors have indirect bandgap while under the strain of (−8% to +8%), the bandgap has changed differently. Projected density of states revealed that CBM and VBM are mainly contributed by p-orbital and d-orbital of Cu-atom respectively in the case of all Copper halides (CuCl, CuBr, and CuI). Similarly, in the case of Silver halides (AgCl, AgBr, and AgI) CBM and VBM are mainly contributed by p- orbital and d-orbital of Ag-atom respectively. Phonon band structures of all unstrained monolayers are thermodynamically stable. The computed real part ε 1 (ω) and the imaginary part ε 2 (ω) of dielectric function revealed that CuCl and CuBr are suitable for the development of devices that may work in the infrared range while other materials such as CuI, AgCl, AgBr, and AgI are suitable for the development of devices that may work in the visible range. Both E V BM and E CBM in CuCl, CuBr, CuI, AgCl, and AgBr (ML) attain favorable positions that’s why these materials are appropriate for water splitting at pH=0 while AgI (ML) is suitable for the reduction of water but not for oxidati
结果表明，所有研究的半导体都具有间接带隙，而在应变（-8% 到 +8%）下，带隙发生了不同的变化。投影状态密度显示，在所有卤化铜（CuCl、CuBr 和 CuI）中，CBM 和 VBM 主要分别由铜原子的 p 轨道和 d 轨道贡献。同样，对于卤化银（AgCl、AgBr 和 AgI），CBM 和 VBM 分别主要由 Ag 原子的 p 轨道和 d 轨道贡献。所有未受约束单层的声带结构在热力学上都是稳定的。计算得出的介电函数实部ε 1 (ω)和虚部ε 2 (ω)表明，CuCl 和 CuBr 适合开发可在红外范围工作的器件，而其他材料如 CuI、AgCl、AgBr 和 AgI 则适合开发可在可见光范围工作的器件。CuCl、CuBr、CuI、AgCl 和 AgBr（ML）中的 E V BM 和 E CBM 都达到了有利的位置，这就是为什么这些材料适合在 pH=0 的条件下进行水分裂，而 AgI（ML）适合还原水，但不适合氧化水。
{"title":"A DFT Study of Optoelectronic and Photo-Catalytic Properties in 2D Copper and Silver Halides through Strain Engineering","authors":"H. A. Alburaih, M. Zia Ur Rehman, M. U. Saeed, N. A. Noor, M. S. H.-E, Dr. Yasir Saeed","doi":"10.1149/2162-8777/ad620d","DOIUrl":"https://doi.org/10.1149/2162-8777/ad620d","url":null,"abstract":"\u0000 The results show that all the studied semiconductors have indirect bandgap while under the strain of (−8% to +8%), the bandgap has changed differently. Projected density of states revealed that CBM and VBM are mainly contributed by p-orbital and d-orbital of Cu-atom respectively in the case of all Copper halides (CuCl, CuBr, and CuI). Similarly, in the case of Silver halides (AgCl, AgBr, and AgI) CBM and VBM are mainly contributed by p- orbital and d-orbital of Ag-atom respectively. Phonon band structures of all unstrained monolayers are thermodynamically stable. The computed real part ε 1 (ω) and the imaginary part ε 2 (ω) of dielectric function revealed that CuCl and CuBr are suitable for the development of devices that may work in the infrared range while other materials such as CuI, AgCl, AgBr, and AgI are suitable for the development of devices that may work in the visible range. Both E V BM and E CBM in CuCl, CuBr, CuI, AgCl, and AgBr (ML) attain favorable positions that’s why these materials are appropriate for water splitting at pH=0 while AgI (ML) is suitable for the reduction of water but not for oxidati","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141655782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-11DOI: 10.1149/2162-8777/ad620f
Guanhua Xu, xudong qiu, Xiaoguang Li
Highly selective conversion of CO2 into CO molecules remains a major challenge in electrocatalytic CO2 reduction reactions, and metallic silver-based materials have great potential. However, the selectivity and activity of traditional silver (Ag)-based materials cannot reach the desired level, and the development of new Ag-based materials has become a hot research topic. Here, novel ag-glomerated spore-shaped Ag nanomaterials are reported for the efficient reduction of CO2 to CO. The unique nanostructures endowed with larger specific surface area, and the spore-like dispersed Ag nanoparticles (NPs) have more unsaturated Ag sites, which endowed the catalysts with higher intrinsic activity. Electrochemical tests show that spore-like Ag can obtain a Faraday efficiency (FE) of 95.6% at -1 V vs. RHE, which is much higher than that of Ag nanowires (NWs) (73%) and ordinary Ag NPs (83%) synthesized in the same period. By using the three different morphologies of Ag synthesized as a research platform and statistically comparing the FE in the corresponding voltage interval, we obtained the influence of morphology effect on the selectivity of CO product production by electrocatalytic CO2 production over Ag-based catalysts, which can be further used as a guideline for catalyst development.
高选择性地将 CO2 转化为 CO 分子仍然是电催化 CO2 还原反应中的一大挑战，而金属银基材料具有巨大的潜力。然而，传统银基材料的选择性和活性无法达到理想水平，开发新型银基材料已成为研究热点。本文报道了新型琼脂团孢状银纳米材料，用于将 CO2 高效还原为 CO。这种独特的纳米结构具有更大的比表面积，孢子状分散的银纳米粒子（NPs）具有更多的不饱和银位点，从而赋予催化剂更高的内在活性。电化学测试表明，孢子状银在-1 V对RHE的电压下可获得95.6%的法拉第效率（FE），远高于同期合成的银纳米线（NWs）（73%）和普通银纳米粒子（NPs）（83%）。我们以合成的三种不同形态的 Ag 为研究平台，统计比较了相应电压区间的 FE，得到了形态效应对 Ag 基催化剂电催化生产 CO2 产物选择性的影响，可进一步作为催化剂开发的指导原则。
{"title":"Modulating the Electrocatalytic CO2-CO Performance by Ag Morphology","authors":"Guanhua Xu, xudong qiu, Xiaoguang Li","doi":"10.1149/2162-8777/ad620f","DOIUrl":"https://doi.org/10.1149/2162-8777/ad620f","url":null,"abstract":"\u0000 Highly selective conversion of CO2 into CO molecules remains a major challenge in electrocatalytic CO2 reduction reactions, and metallic silver-based materials have great potential. However, the selectivity and activity of traditional silver (Ag)-based materials cannot reach the desired level, and the development of new Ag-based materials has become a hot research topic. Here, novel ag-glomerated spore-shaped Ag nanomaterials are reported for the efficient reduction of CO2 to CO. The unique nanostructures endowed with larger specific surface area, and the spore-like dispersed Ag nanoparticles (NPs) have more unsaturated Ag sites, which endowed the catalysts with higher intrinsic activity. Electrochemical tests show that spore-like Ag can obtain a Faraday efficiency (FE) of 95.6% at -1 V vs. RHE, which is much higher than that of Ag nanowires (NWs) (73%) and ordinary Ag NPs (83%) synthesized in the same period. By using the three different morphologies of Ag synthesized as a research platform and statistically comparing the FE in the corresponding voltage interval, we obtained the influence of morphology effect on the selectivity of CO product production by electrocatalytic CO2 production over Ag-based catalysts, which can be further used as a guideline for catalyst development.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141658207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-10DOI: 10.1149/2162-8777/ad6183
Z. Heiba, Noura M. Farag, Hassan Elshemy, Essam E. Ali, Ali Badawi, Mohamed Bakr Mohamed
The performance of the structural, linear/ nonlinear optical and photoluminescent properties of CuCo2O4 and ZnMn2O4 alloying was investigated. (1-x)CuCo2O4/(x)ZnMn2O4 (x=0, 0.10, 0.15, 0.2) samples were prepared by the sol-gel and hydrothermal procedures. Synchrotron X-ray diffraction measurements were employed to investigate the structural and microstructural properties applying the Rietveld refinement method. Fourier transform infraed and Raman techniques were applied to explore the structures’ variation and chemical bonding of the obtained phases. Ultraviolet–visible diffuse reflectance spectroscopy measurements were collected to explore the optical properties. The optical band gap values were determined using the Kubelka-Munk method. All samples exhibited two band gaps in the visible-NIR regions. Upon composing with ZnMn2O4, the band gaps of CuCo2O4 declined for x=0.1 and 0.15, followed by an increase at x=0.2. The possible electronic band structure of the samples and the photoluminescent performance of the prepared samples was investigated. The observed PL patterns manifest wide and asymmetrical emissions. The CIE chromaticity diagram for all samples was plotted. The obtained findings of (1-x)CuCo2O4/(x)ZnMn2O4 nominate their efficient role in optical device fabrication and photocatalyst applications.
{"title":"Exploring the Structural, Optical and Photoluminescence Performances of CuCo2O4 and ZnMn2O4 Alloying","authors":"Z. Heiba, Noura M. Farag, Hassan Elshemy, Essam E. Ali, Ali Badawi, Mohamed Bakr Mohamed","doi":"10.1149/2162-8777/ad6183","DOIUrl":"https://doi.org/10.1149/2162-8777/ad6183","url":null,"abstract":"\u0000 The performance of the structural, linear/ nonlinear optical and photoluminescent properties of CuCo2O4 and ZnMn2O4 alloying was investigated. (1-x)CuCo2O4/(x)ZnMn2O4 (x=0, 0.10, 0.15, 0.2) samples were prepared by the sol-gel and hydrothermal procedures. Synchrotron X-ray diffraction measurements were employed to investigate the structural and microstructural properties applying the Rietveld refinement method. Fourier transform infraed and Raman techniques were applied to explore the structures’ variation and chemical bonding of the obtained phases. Ultraviolet–visible diffuse reflectance spectroscopy measurements were collected to explore the optical properties. The optical band gap values were determined using the Kubelka-Munk method. All samples exhibited two band gaps in the visible-NIR regions. Upon composing with ZnMn2O4, the band gaps of CuCo2O4 declined for x=0.1 and 0.15, followed by an increase at x=0.2. The possible electronic band structure of the samples and the photoluminescent performance of the prepared samples was investigated. The observed PL patterns manifest wide and asymmetrical emissions. The CIE chromaticity diagram for all samples was plotted. The obtained findings of (1-x)CuCo2O4/(x)ZnMn2O4 nominate their efficient role in optical device fabrication and photocatalyst applications.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141661246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-10DOI: 10.1149/2162-8777/ad6182
Muhammad Imran, Maqsood Ahmad, Aneeqa Yasmeen, A. Afzal, M. Iqbal, Sohail Mumtaz, Muhammad Zahir Iqbal, Kareem Yusuf, Shaik Abdul Munnaf, Muhammad Azhar Mumtaz, M. Waris, Muhammad Azeem
In this work, we present a highly effective electrode material (AgCoS@MXene) for supercapattery device application that is produced hydrothermally. We examined the morphology and crystallinity of the synthesized materials using SEM and XRD studies. The synthesized compounds were subjected to a thorough electrochemical performance study employing a three-electrode configuration in a 1 M KOH electrolyte. AgCoS@MXene demonstrated an exceptional Qs of 943.22 C/g at a current density of 2.0 A/g. We formed a supercapattery device (AgCoS@MXene//AC) with AgCoS@MXene as the positive electrode and activated carbon (AC) as the negative electrode. The supercapattery device was demonstrated to have a high specific capacity of 315.22 C/g, a power density of 1275 W/kg, and an energy density of 35.94 Wh/kg. In addition, 5000 charging and discharging cycles were used to assess the device's long-term longevity. The findings indicated that the device preserved nearly 82% of its initial capacity. Besides, the hybrid electrode is used for the electrocatalytic activity for the oxygen reduction reaction
{"title":"Synergistic Advancements in Battery-Grade Energy Storage: AgCoS@MXene@AC Hybrid Electrode Material as an Enhanced Electrocatalyst for Oxygen Reduction Reaction","authors":"Muhammad Imran, Maqsood Ahmad, Aneeqa Yasmeen, A. Afzal, M. Iqbal, Sohail Mumtaz, Muhammad Zahir Iqbal, Kareem Yusuf, Shaik Abdul Munnaf, Muhammad Azhar Mumtaz, M. Waris, Muhammad Azeem","doi":"10.1149/2162-8777/ad6182","DOIUrl":"https://doi.org/10.1149/2162-8777/ad6182","url":null,"abstract":"\u0000 In this work, we present a highly effective electrode material (AgCoS@MXene) for supercapattery device application that is produced hydrothermally. We examined the morphology and crystallinity of the synthesized materials using SEM and XRD studies. The synthesized compounds were subjected to a thorough electrochemical performance study employing a three-electrode configuration in a 1 M KOH electrolyte. AgCoS@MXene demonstrated an exceptional Qs of 943.22 C/g at a current density of 2.0 A/g. We formed a supercapattery device (AgCoS@MXene//AC) with AgCoS@MXene as the positive electrode and activated carbon (AC) as the negative electrode. The supercapattery device was demonstrated to have a high specific capacity of 315.22 C/g, a power density of 1275 W/kg, and an energy density of 35.94 Wh/kg. In addition, 5000 charging and discharging cycles were used to assess the device's long-term longevity. The findings indicated that the device preserved nearly 82% of its initial capacity. Besides, the hybrid electrode is used for the electrocatalytic activity for the oxygen reduction reaction","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141661051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-09DOI: 10.1149/2162-8777/ad6100
Udayan Gupt, Premkumar H. B, J. P. Nunez, Ravi L. Hadimani, V. Dayal, T. N. Prabhu
Exploring luminescent materials that meet the necessary specifications for anti-counterfeiting applications has been the focus of extensive research. In this study, we delve into a double perovskite-structured material, (Y1-x)2WO6:xEu3+ (0≤x≤0.11), synthesized via a chemical combustion method. The crystallographic studies using the X-ray diffraction pattern confirm the crystallization of the nanophosphors into the monoclinic phase with a P2/c space group. The Raman and Fourier transform infrared spectroscopy studies provide insights into the nature of chemical bonding within the material. UV visible spectra are analysed to determine the optical energy gap. Notably, the photoluminescence emission spectra of the Eu3+ incorporated phosphors exhibit a distinct emission peak at 609nm, corresponding to the 5D0→7F2 electric dipole transition of the Eu3+ ions. The optimal photoluminescence intensity is observed for the x=0.07 nanophosphor, with estimated chroma coordinates of (0.500, 0.316), placing it in the reddish-orange region of the chromaticity diagram. The incorporation of Eu3+ enhances magnetization, attributed to the presence of Eu3+ ions in the 7F2 state. The luminance stability is a critical factor for long-term performance, the x=0.07 phosphor was analysed under rigorous physical and chemical testing and is found to be stable, making it a favourable candidate as a luminescence pigment for anti-counterfeiting applications.
{"title":"Structural and Spectroscopic analysis of Reddish-Orange Emitting (Y1-x)2WO6:xEu3+ (0≤x≤0.11) Nanophosphors for Anti-Counterfeiting Application","authors":"Udayan Gupt, Premkumar H. B, J. P. Nunez, Ravi L. Hadimani, V. Dayal, T. N. Prabhu","doi":"10.1149/2162-8777/ad6100","DOIUrl":"https://doi.org/10.1149/2162-8777/ad6100","url":null,"abstract":"\u0000 Exploring luminescent materials that meet the necessary specifications for anti-counterfeiting applications has been the focus of extensive research. In this study, we delve into a double perovskite-structured material, (Y1-x)2WO6:xEu3+ (0≤x≤0.11), synthesized via a chemical combustion method. The crystallographic studies using the X-ray diffraction pattern confirm the crystallization of the nanophosphors into the monoclinic phase with a P2/c space group. The Raman and Fourier transform infrared spectroscopy studies provide insights into the nature of chemical bonding within the material. UV visible spectra are analysed to determine the optical energy gap. Notably, the photoluminescence emission spectra of the Eu3+ incorporated phosphors exhibit a distinct emission peak at 609nm, corresponding to the 5D0→7F2 electric dipole transition of the Eu3+ ions. The optimal photoluminescence intensity is observed for the x=0.07 nanophosphor, with estimated chroma coordinates of (0.500, 0.316), placing it in the reddish-orange region of the chromaticity diagram. The incorporation of Eu3+ enhances magnetization, attributed to the presence of Eu3+ ions in the 7F2 state. The luminance stability is a critical factor for long-term performance, the x=0.07 phosphor was analysed under rigorous physical and chemical testing and is found to be stable, making it a favourable candidate as a luminescence pigment for anti-counterfeiting applications.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-09DOI: 10.1149/2162-8777/ad60fd
Abdesslam Bouhenna, Oussama Zeggai, Mousaab Belarbi, H. Mouloudj, Amaria Ouledabbes, Sami Khettaf
This study presents an analytical model of a strontium titanate (SrTiO3)-based biological field-effect transistor (BioFET) for cholesterol detection. SrTiO3, known for its high dielectric permittivity, surface charge regulation, and superior ionic and thermal conductivity, is utilized to enhance biosensor functionality. The BioFET biosensor employs an SrTiO3 gate functionalized with a cholesterol-specific enzyme, facilitating the potentiometric measurement of cholesterol concentrations. The model establishes a quantitative relationship between cholesterol concentration and the gate voltage in the enzyme-immobilized SrTiO3. It demonstrates that SrTiO3-based BioFETs are highly selective for cholesterol detection, indicating their potential in developing diagnostic tools for cholesterol-related conditions and food quality monitoring. The analytical model effectively predicts the detection mechanism's behavior in electrochemical BioFET biosensors, underscoring the biosensor's innovative application in various fields including microelectronics, sensors, catalysis, and photovoltaics.
{"title":"Advancing Cholesterol Detection: A Simulation Study on SrTiO3-Based BioFET Biosensors","authors":"Abdesslam Bouhenna, Oussama Zeggai, Mousaab Belarbi, H. Mouloudj, Amaria Ouledabbes, Sami Khettaf","doi":"10.1149/2162-8777/ad60fd","DOIUrl":"https://doi.org/10.1149/2162-8777/ad60fd","url":null,"abstract":"\u0000 This study presents an analytical model of a strontium titanate (SrTiO3)-based biological field-effect transistor (BioFET) for cholesterol detection. SrTiO3, known for its high dielectric permittivity, surface charge regulation, and superior ionic and thermal conductivity, is utilized to enhance biosensor functionality. The BioFET biosensor employs an SrTiO3 gate functionalized with a cholesterol-specific enzyme, facilitating the potentiometric measurement of cholesterol concentrations. The model establishes a quantitative relationship between cholesterol concentration and the gate voltage in the enzyme-immobilized SrTiO3. It demonstrates that SrTiO3-based BioFETs are highly selective for cholesterol detection, indicating their potential in developing diagnostic tools for cholesterol-related conditions and food quality monitoring. The analytical model effectively predicts the detection mechanism's behavior in electrochemical BioFET biosensors, underscoring the biosensor's innovative application in various fields including microelectronics, sensors, catalysis, and photovoltaics.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141663047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-09DOI: 10.1149/2162-8777/ad5dfb
G. Satayanarayana Goud, Nakiraboina Venkatesh, D. Ravi Kumar, Syed Ismail Ahmad and P. Veerasomaiah
Through the citrate-gel auto-combustion technique, we synthesized Co-doped cadmium nano ferrites (NFs) with the formula CoxCd1−xFe2O4 (where 0 ≤ x ≤ 1.0 with increments of 0.2). The synthesized materials underwent comprehensive analysis utilizing X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy. Magnetic and electrical properties were evaluated using a vibrating sample magnetometer and LCR meter, respectively. XRD analysis confirmed the spinel phase structure and FD3M space group. SEM analysis revealed agglomerations of nanoparticles and grain boundaries. Elemental analysis of the synthesized nanomaterials was provided by energy dispersive spectroscopy. FTIR spectroscopy identified two main broad bands corresponding to the tetrahedral (A) and octahedral (B) sites, confirming the spinel structure. Magnetic properties such as magnetic saturation, coercivity, and remanent magnetization were characterized using VSM. Additionally, the LCR meter assessed frequency and temperature-dependent dielectric parameters, including AC conductivity (σAC), dielectric permittivity, dielectric loss (tan δ), and impedance spectra. An increase in AC conductivity (σAC) was observed with increasing temperature and frequency.
通过柠檬酸凝胶自动燃烧技术，我们合成了钴掺杂的纳米镉铁氧体（NFs），其化学式为 CoxCd1-xFe2O4（其中 0 ≤ x ≤ 1.0，增量为 0.2）。利用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、傅立叶变换红外光谱 (FTIR) 和 X 射线光电子能谱对合成材料进行了全面分析。磁性和电性分别使用振动样品磁力计和 LCR 计进行了评估。XRD 分析证实了尖晶石相结构和 FD3M 空间群。扫描电镜分析显示了纳米颗粒的团聚和晶界。能谱仪对合成的纳米材料进行了元素分析。傅立叶变换红外光谱确定了与四面体（A）和八面体（B）位点相对应的两个主要宽带，证实了尖晶石结构。磁饱和度、矫顽力和剩磁等磁性能是用 VSM 表征的。此外，LCR 计还评估了频率和温度相关的介电参数，包括交流电导率（σAC）、介电常数、介电损耗（tan δ）和阻抗谱。观察到交流电导率（σAC）随着温度和频率的升高而增加。
{"title":"Co3+ Doped CdFe2O4 Nanoparticles: Structural, Optical, Magnetic, and Electrical Properties","authors":"G. Satayanarayana Goud, Nakiraboina Venkatesh, D. Ravi Kumar, Syed Ismail Ahmad and P. Veerasomaiah","doi":"10.1149/2162-8777/ad5dfb","DOIUrl":"https://doi.org/10.1149/2162-8777/ad5dfb","url":null,"abstract":"Through the citrate-gel auto-combustion technique, we synthesized Co-doped cadmium nano ferrites (NFs) with the formula CoxCd1−xFe2O4 (where 0 ≤ x ≤ 1.0 with increments of 0.2). The synthesized materials underwent comprehensive analysis utilizing X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy. Magnetic and electrical properties were evaluated using a vibrating sample magnetometer and LCR meter, respectively. XRD analysis confirmed the spinel phase structure and FD3M space group. SEM analysis revealed agglomerations of nanoparticles and grain boundaries. Elemental analysis of the synthesized nanomaterials was provided by energy dispersive spectroscopy. FTIR spectroscopy identified two main broad bands corresponding to the tetrahedral (A) and octahedral (B) sites, confirming the spinel structure. Magnetic properties such as magnetic saturation, coercivity, and remanent magnetization were characterized using VSM. Additionally, the LCR meter assessed frequency and temperature-dependent dielectric parameters, including AC conductivity (σAC), dielectric permittivity, dielectric loss (tan δ), and impedance spectra. An increase in AC conductivity (σAC) was observed with increasing temperature and frequency.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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