Pub Date : 2024-04-18DOI: 10.1149/2162-8777/ad405a
Reem Altuijri, A. Atta, E. Abdeltwab, M. M. Abdelhamied
This work study the effects of argon beam irradiation on surface properties of CA/PANI films using cold cathode source with varying ion fluences (4×1014, 8×1014, and 12×1014 ions/cm2). The EDX, SEM and FTIR methods verified successful fabrication of the composites. Surface free energy, contact angle, and work of adhesion were measured for both the pure and irradiated films. Raising the ion flux from 4x1014 ions.cm-2 to 12x1014 ions.cm-2 it decreases the contact angle of CA/PANI from 62.1o to 43.4o and increases the surface free energy from 46.7 to 63.9 mJ/m2. The results showed that the CA/PANI changed after exposed to radiation, proving that the irradiated surface properties were improved. In addition, their electrical conductivity was tested in the frequency range of 50 to106 Hz for CA/PANI films. When subjected to 12x1014 ions.cm-2, the conductivity rose from 1.1×10-8 S/cm for CA/PANI to 6.5×10-7 S/cm. The results showed that the irradiated CA/PANI had better electrical and surface properties, which is crucial for many devices including batteries and supercapacitors
{"title":"Impacts of Low Energy Argon Beam on Enhancing the Surface Wettability and Electrical Performance of CA/PANI Films","authors":"Reem Altuijri, A. Atta, E. Abdeltwab, M. M. Abdelhamied","doi":"10.1149/2162-8777/ad405a","DOIUrl":"https://doi.org/10.1149/2162-8777/ad405a","url":null,"abstract":"\u0000 This work study the effects of argon beam irradiation on surface properties of CA/PANI films using cold cathode source with varying ion fluences (4×1014, 8×1014, and 12×1014 ions/cm2). The EDX, SEM and FTIR methods verified successful fabrication of the composites. Surface free energy, contact angle, and work of adhesion were measured for both the pure and irradiated films. Raising the ion flux from 4x1014 ions.cm-2 to 12x1014 ions.cm-2 it decreases the contact angle of CA/PANI from 62.1o to 43.4o and increases the surface free energy from 46.7 to 63.9 mJ/m2. The results showed that the CA/PANI changed after exposed to radiation, proving that the irradiated surface properties were improved. In addition, their electrical conductivity was tested in the frequency range of 50 to106 Hz for CA/PANI films. When subjected to 12x1014 ions.cm-2, the conductivity rose from 1.1×10-8 S/cm for CA/PANI to 6.5×10-7 S/cm. The results showed that the irradiated CA/PANI had better electrical and surface properties, which is crucial for many devices including batteries and supercapacitors","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140688645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-17DOI: 10.1149/2162-8777/ad3fe5
Deepa Kumari, Megha Prajapati, Chhaya Ravi Kant
Detection of glucose is highly informative, creating a constant demand for fabricating high-precision glucose biosensors. Metal–organic frameworks, a family of porous materials renowned for their tunability, can be an excellent choice for developing such sensors. We have developed a highly-sensitive, non-enzymatic sensor for electrochemical detection of glucose fabricated using Copper Metal–Organic Framework (Cu MOF), synthesized by a simple, room-temperature stirring method using Benzene-1,3,5-tricarboxylic acid (BTC) as ligand and Copper nitrate trihydrate as precursor. The synthesized nanostructure was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray analytical techniques. Powder X-ray diffraction study and thermogravimetric analysis were also done. Further, Brunnauer-Emmett-Teller analysis revealed the porous nature of Cu MOF. The materials exhibited strong electro-catalytic activity for glucose oxidation as revealed from cyclic voltammetry and chronoamperometric studies done under alkaline pH conditions. The Cu MOF deposited on a conducting graphite sheet electrode displayed a significantly low detection limit of 0.019 mM through a broad detection range (1–15 mM) and a strong sensitivity of 229.4 μAmM-1 cm2. Overall, the Cu MOF/GS exhibits exceptional stability, short response time (less than 1s), and good repeatability and reproducibility, making it a promising future material for non-enzymatic glucose detection.
葡萄糖的检测具有很高的信息量，因此对制造高精度葡萄糖生物传感器的需求不断增加。金属有机框架是以可调性著称的多孔材料系列，是开发此类传感器的绝佳选择。我们利用金属有机框架铜（Cu MOF）开发了一种用于电化学检测葡萄糖的高灵敏度非酶传感器，该传感器以苯-1,3,5-三羧酸（BTC）为配体，以三水硝酸铜为前驱体，通过简单的室温搅拌法合成。利用傅立叶变换红外光谱、扫描电子显微镜和能量色散 X 射线分析技术对合成的纳米结构进行了表征。此外，还进行了粉末 X 射线衍射研究和热重分析。此外，Brunnauer-Emmett-Teller 分析还揭示了 Cu MOF 的多孔性。在碱性 pH 条件下进行的循环伏安法和计时电流法研究表明，这些材料具有很强的葡萄糖氧化电催化活性。沉积在导电石墨片电极上的 Cu MOF 在较宽的检测范围（1-15 mM）内显示出 0.019 mM 的较低检测限和 229.4 μAmM-1 cm2 的较高灵敏度。总之，Cu MOF/GS 具有优异的稳定性、较短的响应时间（小于 1 秒）以及良好的重复性和再现性，使其成为一种很有前途的非酶葡萄糖检测材料。
{"title":"Highly Efficient Non-Enzymatic Electrochemical Glucose Biosensor Based on Copper Metal Organic Framework Coated on Graphite Sheet","authors":"Deepa Kumari, Megha Prajapati, Chhaya Ravi Kant","doi":"10.1149/2162-8777/ad3fe5","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3fe5","url":null,"abstract":"\u0000 Detection of glucose is highly informative, creating a constant demand for fabricating high-precision glucose biosensors. Metal–organic frameworks, a family of porous materials renowned for their tunability, can be an excellent choice for developing such sensors. We have developed a highly-sensitive, non-enzymatic sensor for electrochemical detection of glucose fabricated using Copper Metal–Organic Framework (Cu MOF), synthesized by a simple, room-temperature stirring method using Benzene-1,3,5-tricarboxylic acid (BTC) as ligand and Copper nitrate trihydrate as precursor. The synthesized nanostructure was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray analytical techniques. Powder X-ray diffraction study and thermogravimetric analysis were also done. Further, Brunnauer-Emmett-Teller analysis revealed the porous nature of Cu MOF. The materials exhibited strong electro-catalytic activity for glucose oxidation as revealed from cyclic voltammetry and chronoamperometric studies done under alkaline pH conditions. The Cu MOF deposited on a conducting graphite sheet electrode displayed a significantly low detection limit of 0.019 mM through a broad detection range (1–15 mM) and a strong sensitivity of 229.4 μAmM-1 cm2. Overall, the Cu MOF/GS exhibits exceptional stability, short response time (less than 1s), and good repeatability and reproducibility, making it a promising future material for non-enzymatic glucose detection.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140690605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-17DOI: 10.1149/2162-8777/ad3fe7
Sudarsan Vadnala, T. D. Rao, S. Asthana, M. Pal
This research explored the temperature dependence magnetization, magnetocaloric effect, and critical field analysis of Nd0.7-xLaxSr0.3MnO3 (x = 0.0, 0.1, 0.2 and 0.3) manganites samples synthesized through solid state reaction route. The substitution of La3+ at Nd3+ site enhances the A-site average ionic radius ( ) from 1.321 Å (for x = 0.0) to 1.348 Å (for x = 0.3). An increase in reduced the internal chemical pressure inside the lattice such that the Mn-O-Mn bond angle approached 180°. In addition, an increase in Mn-O-Mn bond angle supresses the spin-lattice interaction, which consequently reduces the change in maximum magnetic entropy at the magnetic transition temperature. This implies that variation of A-site average ionic radius influences the change in maximum magnetic entropy. The critical behavior of the manganite samples was addressed based on the data of magnetization measurements around the transition temperature TC. Various techniques such as modified Arrott plot, a Kouvel–Fisher method, and critical isotherm analysis were used to measure the values of the ferromagnetic transition temperature TC, as well as the critical exponents of β, γ, and δ. The magnetic order parameter is very well obeyed with scaling relation with change in magnetic entropy.
{"title":"Investigation of Magnetocaloric Effect and Critical Field Analysis of Nd0.7-xLaxSr0.3MnO3 (x = 0.0 - 0.3) Manganites","authors":"Sudarsan Vadnala, T. D. Rao, S. Asthana, M. Pal","doi":"10.1149/2162-8777/ad3fe7","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3fe7","url":null,"abstract":"\u0000 This research explored the temperature dependence magnetization, magnetocaloric effect, and critical field analysis of Nd0.7-xLaxSr0.3MnO3 (x = 0.0, 0.1, 0.2 and 0.3) manganites samples synthesized through solid state reaction route. The substitution of La3+ at Nd3+ site enhances the A-site average ionic radius ( ) from 1.321 Å (for x = 0.0) to 1.348 Å (for x = 0.3). An increase in reduced the internal chemical pressure inside the lattice such that the Mn-O-Mn bond angle approached 180°. In addition, an increase in Mn-O-Mn bond angle supresses the spin-lattice interaction, which consequently reduces the change in maximum magnetic entropy at the magnetic transition temperature. This implies that variation of A-site average ionic radius influences the change in maximum magnetic entropy. The critical behavior of the manganite samples was addressed based on the data of magnetization measurements around the transition temperature TC. Various techniques such as modified Arrott plot, a Kouvel–Fisher method, and critical isotherm analysis were used to measure the values of the ferromagnetic transition temperature TC, as well as the critical exponents of β, γ, and δ. The magnetic order parameter is very well obeyed with scaling relation with change in magnetic entropy.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140693485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-16DOI: 10.1149/2162-8777/ad3f4d
A. Salwa, M. Nassary, H. Shaban, M. Gerges
The structural parameters of Ga2Te5 crystals grown using the Bridgman method have been studied. X-ray diffaction analysis revealed the crystal structure of Ga2Te5 in the tetragonal phase. In addition, crystalline size, strain, and dislocation density were calculated with the Sherrer model and the Williamson-Hall (W-H) model. The switching effect was achieved for Ga2Te5 crystals. Furthermore, the effect of temperature and light intensity was studied for Ga2Te5 crystals. The results show that temperature and light intensity affect switching characteristics such as threshold current (ith), threshold voltage (Vth), threshold power (Pth), and resistance ratios from a high-resistance OFF state to a low-resistance ON state (ROFF/RON).
{"title":"Study of the Structural and Switching Properties of Ga2Te5 Crystals","authors":"A. Salwa, M. Nassary, H. Shaban, M. Gerges","doi":"10.1149/2162-8777/ad3f4d","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3f4d","url":null,"abstract":"\u0000 The structural parameters of Ga2Te5 crystals grown using the Bridgman method have been studied. X-ray diffaction analysis revealed the crystal structure of Ga2Te5 in the tetragonal phase. In addition, crystalline size, strain, and dislocation density were calculated with the Sherrer model and the Williamson-Hall (W-H) model. The switching effect was achieved for Ga2Te5 crystals. Furthermore, the effect of temperature and light intensity was studied for Ga2Te5 crystals. The results show that temperature and light intensity affect switching characteristics such as threshold current (ith), threshold voltage (Vth), threshold power (Pth), and resistance ratios from a high-resistance OFF state to a low-resistance ON state (ROFF/RON).","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140695605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-16DOI: 10.1149/2162-8777/ad3f4e
Rachid Chelghoum, Z. Messai, A. Brahimi, N. Bourouba, J. P. Martínez Jiménez, Farid Bouttout
We are working to design dielectric resonator antennas based on binary composites made of epoxy resin (RE) and barium titanate (BaTiO3 or BT). The composite samples are prepared at room temperature and under atmospheric pressure. The dielectric properties of these composites were assessed using time domain spectroscopy (TDS). The antennas structure are designed, simulated, and optimized using electromagnetic software Ansys, HFSS. Two types of antennas are studied. The first type consists of a cylindrical dielectric resonator that gives three antenna models in terms of bandwidths, the antennas having a single frequency band, the antennas having dual-band, and the antenna covering three frequency bands, with peak gains varying between 3.68 and 8.15 dB achieved. The second type consists of dielectric resonators composed of two adjacent identical shapes each consisting of a rectangular joined with a cylindrical with the same height. The proposed antenna achieves ultra-wideband with a relative bandwidth of 97% covering the range of 6 to 17.32 GHz, and dual-band circularly polarized (AR<3 dB), the range of the lower band is 9.62 to 10.14 GHz and the range of the upper band is 16.74 to 16.94 GHz. The focus of this research is on creating novel antennas for applications in wireless communications systems.
{"title":"Dielectric Behavior Characterization of RE/BaTiO3 Using Time Domain Spectroscopy: Application on High-Performance Dielectric Resonator Antennas","authors":"Rachid Chelghoum, Z. Messai, A. Brahimi, N. Bourouba, J. P. Martínez Jiménez, Farid Bouttout","doi":"10.1149/2162-8777/ad3f4e","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3f4e","url":null,"abstract":"\u0000 We are working to design dielectric resonator antennas based on binary composites made of epoxy resin (RE) and barium titanate (BaTiO3 or BT). The composite samples are prepared at room temperature and under atmospheric pressure. The dielectric properties of these composites were assessed using time domain spectroscopy (TDS). The antennas structure are designed, simulated, and optimized using electromagnetic software Ansys, HFSS. Two types of antennas are studied. The first type consists of a cylindrical dielectric resonator that gives three antenna models in terms of bandwidths, the antennas having a single frequency band, the antennas having dual-band, and the antenna covering three frequency bands, with peak gains varying between 3.68 and 8.15 dB achieved. The second type consists of dielectric resonators composed of two adjacent identical shapes each consisting of a rectangular joined with a cylindrical with the same height. The proposed antenna achieves ultra-wideband with a relative bandwidth of 97% covering the range of 6 to 17.32 GHz, and dual-band circularly polarized (AR<3 dB), the range of the lower band is 9.62 to 10.14 GHz and the range of the upper band is 16.74 to 16.94 GHz. The focus of this research is on creating novel antennas for applications in wireless communications systems.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140696021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-16DOI: 10.1149/2162-8777/ad3f4c
Jintao Sun, Yunpeng Ju, Naibao Huang, Mengqi Bi, Zhen Gao, M. Tang, Wan Li, Xiannian Sun, Guogang Yang
Developing high-performance anion-exchange membrane fuel cells requires stable and highly active oxygen reduction (ORR) catalysts. To fabricate cheap and efficient porous carbon materials for ORR, heteroatom-doped carbon nanorods were synthesized by pyrolyzing Bacillus subtilis. The obtained carbon material maintained the uniformly distributed nanorods as original Bacillus subtilis and had inherent doped heteroatom. The obtained BS-2.0 had the highest specific surface area (209.04 m2 g-1) and the maximum ID/IG (1.0372). Its starting potential (0.93 V vs. RHE) and semi-wave potential (0.81 V vs. RHE) were close to 20% commercial Pt/C, and its ultimate current density was 3.98 mA cm-2@1600 rpm. Meanwhile, the stability of cycling potentiates polarization, and methanol tolerance of BS-2.0 were all greater than 20% commercial Pt/C. It was the inherent heteroatom, well-distributed nanorods, abundant pore distribution, and large surface area that contributed to its excellent electrochemical performance.
开发高性能阴离子交换膜燃料电池需要稳定、高活性的氧还原（ORR）催化剂。为了制备用于 ORR 的廉价而高效的多孔碳材料，我们通过热解枯草芽孢杆菌合成了掺杂杂原子的碳纳米棒。得到的碳材料保持了枯草芽孢杆菌原始纳米棒的均匀分布，并具有固有的掺杂杂原子。获得的 BS-2.0 具有最大的比表面积（209.04 m2 g-1）和最大的内径/内径比（1.0372）。其起始电位（0.93 V vs. RHE）和半波电位（0.81 V vs. RHE）接近 20% 的商用 Pt/C，极限电流密度为 3.98 mA cm-2@1600 rpm。同时，BS-2.0 的循环电位稳定性和甲醇耐受性均高于 20% 的商用铂/铂。BS-2.0固有的异质原子、分布均匀的纳米棒、丰富的孔隙分布和较大的比表面积造就了其优异的电化学性能。
{"title":"Bacillus Subtilis-Derived Carbon Nanorods as Efficient ORR Electrocatalysts","authors":"Jintao Sun, Yunpeng Ju, Naibao Huang, Mengqi Bi, Zhen Gao, M. Tang, Wan Li, Xiannian Sun, Guogang Yang","doi":"10.1149/2162-8777/ad3f4c","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3f4c","url":null,"abstract":"\u0000 Developing high-performance anion-exchange membrane fuel cells requires stable and highly active oxygen reduction (ORR) catalysts. To fabricate cheap and efficient porous carbon materials for ORR, heteroatom-doped carbon nanorods were synthesized by pyrolyzing Bacillus subtilis. The obtained carbon material maintained the uniformly distributed nanorods as original Bacillus subtilis and had inherent doped heteroatom. The obtained BS-2.0 had the highest specific surface area (209.04 m2 g-1) and the maximum ID/IG (1.0372). Its starting potential (0.93 V vs. RHE) and semi-wave potential (0.81 V vs. RHE) were close to 20% commercial Pt/C, and its ultimate current density was 3.98 mA cm-2@1600 rpm. Meanwhile, the stability of cycling potentiates polarization, and methanol tolerance of BS-2.0 were all greater than 20% commercial Pt/C. It was the inherent heteroatom, well-distributed nanorods, abundant pore distribution, and large surface area that contributed to its excellent electrochemical performance.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140697191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-12DOI: 10.1149/2162-8777/ad3e2e
Abhay Pratap Singh, R. Baghel, Sukeshni Tirkey
The analog/radio-frequency (RF) performance of a ferroelectric-based substrate metal oxide semiconductor field effect transistor (FE-MOSFET) with dielectric spacer was designed and proposed. The utilization of gate side wall spacers aims to mitigate short-channel effects (SCEs), and improve overall device performance. Simulation results demonstrate enhanced performance metrics, including improved transconductance (80%), reduced gate leakage (95.4%), and enhanced cutoff frequency (25%), making this design a promising candidate for next-generation high-performance analog and RF applications. Additionally, a novel machine learning (ML)-assisted approach is proposed for investigating the spacer-based FE-MOSFET to reduce the computational cost of numerical TCAD device simulations with the help of conventional- artificial neural network (C-ANN). This method is reported for the first-time ML-based C-ANN for Fe-based low-power MOSFET, matches the similar accuracy of physics-based TCAD with the fastest learning rate and fastest computational speed (in 95-100 seconds). An ML-based prediction replacement for physics-based TCAD is developed to save around 8-10 hours of runtime for each iteration. Because ML predictions can never be 100% accurate, it is essential to ensure approximately zero mean-square error in the final results.
本研究设计并提出了带有介质间隔的铁电基衬底金属氧化物半导体场效应晶体管（FE-MOSFET）的模拟/射频（RF）性能。利用栅极侧壁垫片的目的是减轻短沟道效应（SCE），提高器件的整体性能。仿真结果表明，该器件的性能指标得到了增强，包括提高了跨导（80%）、降低了栅极漏电（95.4%）和增强了截止频率（25%），从而使该设计成为下一代高性能模拟和射频应用的理想候选器件。此外，在传统人工神经网络（C-ANN）的帮助下，还提出了一种新颖的机器学习（ML）辅助方法来研究基于隔板的 FE-MOSFET，以降低 TCAD 器件数值模拟的计算成本。该方法首次报道了基于 ML 的 C-ANN 用于铁基低功耗 MOSFET，以最快的学习速度和最快的计算速度（95-100 秒）达到了与基于物理的 TCAD 相似的精度。基于 ML 的预测可替代基于物理的 TCAD，每次迭代可节省约 8-10 小时的运行时间。由于 ML 预测不可能达到 100% 的准确率，因此必须确保最终结果的均方误差约为零。
{"title":"Ferroelectric Based Low Power MOSFET for DC/RF Applications: Machine Learning Assisted Statistical Variation Analysis","authors":"Abhay Pratap Singh, R. Baghel, Sukeshni Tirkey","doi":"10.1149/2162-8777/ad3e2e","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3e2e","url":null,"abstract":"\u0000 The analog/radio-frequency (RF) performance of a ferroelectric-based substrate metal oxide semiconductor field effect transistor (FE-MOSFET) with dielectric spacer was designed and proposed. The utilization of gate side wall spacers aims to mitigate short-channel effects (SCEs), and improve overall device performance. Simulation results demonstrate enhanced performance metrics, including improved transconductance (80%), reduced gate leakage (95.4%), and enhanced cutoff frequency (25%), making this design a promising candidate for next-generation high-performance analog and RF applications. Additionally, a novel machine learning (ML)-assisted approach is proposed for investigating the spacer-based FE-MOSFET to reduce the computational cost of numerical TCAD device simulations with the help of conventional- artificial neural network (C-ANN). This method is reported for the first-time ML-based C-ANN for Fe-based low-power MOSFET, matches the similar accuracy of physics-based TCAD with the fastest learning rate and fastest computational speed (in 95-100 seconds). An ML-based prediction replacement for physics-based TCAD is developed to save around 8-10 hours of runtime for each iteration. Because ML predictions can never be 100% accurate, it is essential to ensure approximately zero mean-square error in the final results.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140710673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-12DOI: 10.1149/2162-8777/ad3e2f
Pierre Tomasini
A consolidation of the fundamentals of elemental crystallogen chemical vapor deposition (CVD) is a necessity in view of the extensive evidence accumulated over the last few decades. An in-depth understanding of deposition mechanisms via hydrides asks for a discerning understanding of molecular hydrogen dissociative adsorption, precursor thermal decomposition, and CVD growth rates. With those, a groundbreaking paradigm shift comes to light. GR activation energy E(GR) fingerprints the surface energy. SE ≈ 2E(GR) / (aa), where SE is surface energy, E(GR) activation energy, a lattice parameter. Hydride precursor thermal decomposition consistency with the corresponding solid growth kinetics is demonstrated. Heterogeneous TD kinetics captures a solid deposition and not a gas phase molecular reaction. Thermodynamic equilibrium is achieved during the heterogeneous thermal decomposition of silicon precursors. The popular split between mass-transfer and kinetic regimes is not supported by evidence. Three mechanisms are apparent. The first is controlled by a Si–H bond dissociation energy. The second is controlled by an H–H bond dissociation energy. The last is controlled by a Si–Si bond dissociation energy as lattice sites are sealed off with Si–H bonds.
{"title":"Chemical Vapor Deposition of Elemental Crystallogen Thin Films","authors":"Pierre Tomasini","doi":"10.1149/2162-8777/ad3e2f","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3e2f","url":null,"abstract":"\u0000 A consolidation of the fundamentals of elemental crystallogen chemical vapor deposition (CVD) is a necessity in view of the extensive evidence accumulated over the last few decades. An in-depth understanding of deposition mechanisms via hydrides asks for a discerning understanding of molecular hydrogen dissociative adsorption, precursor thermal decomposition, and CVD growth rates. With those, a groundbreaking paradigm shift comes to light. GR activation energy E(GR) fingerprints the surface energy. SE ≈ 2E(GR) / (aa), where SE is surface energy, E(GR) activation energy, a lattice parameter. Hydride precursor thermal decomposition consistency with the corresponding solid growth kinetics is demonstrated. Heterogeneous TD kinetics captures a solid deposition and not a gas phase molecular reaction. Thermodynamic equilibrium is achieved during the heterogeneous thermal decomposition of silicon precursors. The popular split between mass-transfer and kinetic regimes is not supported by evidence. Three mechanisms are apparent. The first is controlled by a Si–H bond dissociation energy. The second is controlled by an H–H bond dissociation energy. The last is controlled by a Si–Si bond dissociation energy as lattice sites are sealed off with Si–H bonds.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140710206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-12DOI: 10.1149/2162-8777/ad3e2d
Sezgin Yasa, B. Birol, Metin Gençten
Recycling of LiCoO2 (LCO) based Li-ion batteries for energy storage systems is crucial both environmentally and economically. Reusing active species of LCO cathodes minimizes waste and conserves resources, promoting sustainability in energy storage. We have investigated repurposing cobalt from spent LiCoO2 (LCO) type Li-ion batteries into a cobalt sulfide-based compound (CS), which was then employed as an electrode material in asymmetric supercapacitors. Initially, the LCO cathode compound underwent leaching, resulting in the precipitation of CS utilizing the sulfur source derived from cobalt ions present in the solution. Furthermore, chlorine-doped graphene oxide (Cl-GO) was synthesized via the chronoamperometric method utilizing a 5 M perchloric acid solution. Produced CS and Cl-GO were characterized by using spectroscopic and microscopic techniques. The resulting CS and Cl-GO powders were combined to form the composite positive electrode of coin cell type asymmetric supercapacitors (CCTAS), with graphite powder (GP) utilized in the preparation of the negative electrode. CCTAS were also characterized by using electrochemical techniques such as cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge. The highest areal capacitance, recorded as 101 mF.cm-2 at a scan rate of 10 mV.s-1, was achieved in the CS/Cl-GO%15//GP CCTAS, with a capacitance retention of approximately 94% observed after 1000 cycles.
{"title":"Electrochemical Supercapacitor Application of Electrochemically Produced Chlorine-Doped Graphene Oxide with Cobalt Sulfide-Based Compounds Produced from Recycling of Spent Li-Ion Batteries","authors":"Sezgin Yasa, B. Birol, Metin Gençten","doi":"10.1149/2162-8777/ad3e2d","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3e2d","url":null,"abstract":"\u0000 Recycling of LiCoO2 (LCO) based Li-ion batteries for energy storage systems is crucial both environmentally and economically. Reusing active species of LCO cathodes minimizes waste and conserves resources, promoting sustainability in energy storage. We have investigated repurposing cobalt from spent LiCoO2 (LCO) type Li-ion batteries into a cobalt sulfide-based compound (CS), which was then employed as an electrode material in asymmetric supercapacitors. Initially, the LCO cathode compound underwent leaching, resulting in the precipitation of CS utilizing the sulfur source derived from cobalt ions present in the solution. Furthermore, chlorine-doped graphene oxide (Cl-GO) was synthesized via the chronoamperometric method utilizing a 5 M perchloric acid solution. Produced CS and Cl-GO were characterized by using spectroscopic and microscopic techniques. The resulting CS and Cl-GO powders were combined to form the composite positive electrode of coin cell type asymmetric supercapacitors (CCTAS), with graphite powder (GP) utilized in the preparation of the negative electrode. CCTAS were also characterized by using electrochemical techniques such as cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge. The highest areal capacitance, recorded as 101 mF.cm-2 at a scan rate of 10 mV.s-1, was achieved in the CS/Cl-GO%15//GP CCTAS, with a capacitance retention of approximately 94% observed after 1000 cycles.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140711555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-11DOI: 10.1149/2162-8777/ad3d86
Yogesh Thakur, Balwinder Raj, B. Raj
Electrical properties of an organic field-effect transistor were modelled in top gate top contact (TGTC) geometry and H2 gas sensors were designed for increased sensitivity based on the structure. Safety concerns related to hydrogen usage must be addressed; these hazardous characteristics include a wide flammable range (4-75%) that results in a rapid burning velocity, a low minimum ignition energy (0.017 mJ), a high heat of combustion (143 kJ/g), and the high diffusivity of hydrogen gas (0.61 cm2/s in the air). These characteristics make it impossible to control hydrogen combustion after a specific time. All simulations were performed in the Silvaco TCAD ATLAS tool. We analysed the driving principle of gas sensors and introduced gas sensing properties in OFET using platinum metal at the gate electrode for H2 gas detection. IOFF, ION, and VTH are sensitivity parameters that alter when the metalwork function of the gate changes with respect to the gas present on it. The designed sensor was analysed for different dielectric materials. Results demonstrate that the increase in sensitivity for OFET-based H2 sensors is 73.4 %, 80.7%, 90.5 %, and 95.6 % when the work function changes by 50, 100, 150, and 200 meV for Pt gate electrodes with an increase in dielectric value of insulating layer from SiO2 (3.9) to La2O3 (27). Results were compared with the In1-xGaxAs CGNWFET-based H2 sensor as the work function varies at 200 meV,the sensitivity enhancement with OFET-based H2 sensors is 8.09%
{"title":"Design of Pentacene Thin-Film Transistor Based Hydrogen Gas Sensor with High-K Dielectric Materials for High Sensitivity","authors":"Yogesh Thakur, Balwinder Raj, B. Raj","doi":"10.1149/2162-8777/ad3d86","DOIUrl":"https://doi.org/10.1149/2162-8777/ad3d86","url":null,"abstract":"\u0000 Electrical properties of an organic field-effect transistor were modelled in top gate top contact (TGTC) geometry and H2 gas sensors were designed for increased sensitivity based on the structure. Safety concerns related to hydrogen usage must be addressed; these hazardous characteristics include a wide flammable range (4-75%) that results in a rapid burning velocity, a low minimum ignition energy (0.017 mJ), a high heat of combustion (143 kJ/g), and the high diffusivity of hydrogen gas (0.61 cm2/s in the air). These characteristics make it impossible to control hydrogen combustion after a specific time. All simulations were performed in the Silvaco TCAD ATLAS tool. We analysed the driving principle of gas sensors and introduced gas sensing properties in OFET using platinum metal at the gate electrode for H2 gas detection. IOFF, ION, and VTH are sensitivity parameters that alter when the metalwork function of the gate changes with respect to the gas present on it. The designed sensor was analysed for different dielectric materials. Results demonstrate that the increase in sensitivity for OFET-based H2 sensors is 73.4 %, 80.7%, 90.5 %, and 95.6 % when the work function changes by 50, 100, 150, and 200 meV for Pt gate electrodes with an increase in dielectric value of insulating layer from SiO2 (3.9) to La2O3 (27). Results were compared with the In1-xGaxAs CGNWFET-based H2 sensor as the work function varies at 200 meV,the sensitivity enhancement with OFET-based H2 sensors is 8.09%","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140714366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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