In this study, the usability of industrial iron chip waste was investigated to provide recycling in the production of reinforced concrete cantilever beams with different stirrup spacings and hook angles. In the concrete produced for cantilever beams, aggregates not larger than 4 mm in diameter were reduced by 20% and replaced with iron chip waste. Cantilever beams are manufactured with stirrup spaces of 50, 100 and 150 mm. The hook angles of the stirrups are differentiated to be 90 and 135 degrees. The experimental setup was prepared in such a way that one side of the samples was fixed, and the other side was free. Load-displacement curves of cantilever beams were obtained. In the research, it was observed that although cantilever beams with 20% iron chips experienced a decrease in their strength compared to the reference beams, they increased their ductility values at all three different stirrup spaces. As the stirrup spacing widened, the ductility values decreased. However, the effect of iron chip additives on ductility has increased. Samples with a stirrup hook angle of 135 degrees increased both strength and ductility values compared to samples with a stirrup hook angle of 90 degrees.
{"title":"The effect of stirrup spacing and hook angle on RC cantilever beams with iron chip waste","authors":"Muhammet Zeki Ozyurt, Omer Fatih Sancak","doi":"10.1680/jemmr.22.00060","DOIUrl":"https://doi.org/10.1680/jemmr.22.00060","url":null,"abstract":"In this study, the usability of industrial iron chip waste was investigated to provide recycling in the production of reinforced concrete cantilever beams with different stirrup spacings and hook angles. In the concrete produced for cantilever beams, aggregates not larger than 4 mm in diameter were reduced by 20% and replaced with iron chip waste. Cantilever beams are manufactured with stirrup spaces of 50, 100 and 150 mm. The hook angles of the stirrups are differentiated to be 90 and 135 degrees. The experimental setup was prepared in such a way that one side of the samples was fixed, and the other side was free. Load-displacement curves of cantilever beams were obtained. In the research, it was observed that although cantilever beams with 20% iron chips experienced a decrease in their strength compared to the reference beams, they increased their ductility values at all three different stirrup spaces. As the stirrup spacing widened, the ductility values decreased. However, the effect of iron chip additives on ductility has increased. Samples with a stirrup hook angle of 135 degrees increased both strength and ductility values compared to samples with a stirrup hook angle of 90 degrees.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44535335","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}
Determination of the diffusion constant for specific cases can be achieved in different ways. One of them is by using the outgassing of some gas in high vacuum from a solid body. In this paper, the diffusion constant of helium from ULE (ultra-low expansion) glass is determined by using experimental data for outgassing rate of helium from three ULE glass plates with different dimensions. ULE glasses are one of the candidates which may be used in the project for quantum pascal. Usually, the diffusion constant is found by mathematical models which neglect the thickness of the plate. In this paper, a mathematical model for the outgassing of the helium by ULE glass is constructed, taking into account also the thickness of the plates. Optimum values for diffusion coefficient D are determined, such that the mathematical model for outgassing will fit in the best way possible the experimental data. Optimum values for D are calculated based on the fitting by the method of least squares. Values obtained in this manner are compared with the values taken by the previous models which considers plates as infinitely thin surfaces. Thus, the difference between these values, namely the edge effect on the outgassing of helium by ULE glass, is determined.
{"title":"Edge effect on helium outgassing from ULE glass","authors":"Isuf Tredhaku, S. Avdiaj","doi":"10.1680/jemmr.22.00022","DOIUrl":"https://doi.org/10.1680/jemmr.22.00022","url":null,"abstract":"Determination of the diffusion constant for specific cases can be achieved in different ways. One of them is by using the outgassing of some gas in high vacuum from a solid body. In this paper, the diffusion constant of helium from ULE (ultra-low expansion) glass is determined by using experimental data for outgassing rate of helium from three ULE glass plates with different dimensions. ULE glasses are one of the candidates which may be used in the project for quantum pascal. Usually, the diffusion constant is found by mathematical models which neglect the thickness of the plate. In this paper, a mathematical model for the outgassing of the helium by ULE glass is constructed, taking into account also the thickness of the plates. Optimum values for diffusion coefficient D are determined, such that the mathematical model for outgassing will fit in the best way possible the experimental data. Optimum values for D are calculated based on the fitting by the method of least squares. Values obtained in this manner are compared with the values taken by the previous models which considers plates as infinitely thin surfaces. Thus, the difference between these values, namely the edge effect on the outgassing of helium by ULE glass, is determined.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44513088","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}
The human hand is one of the main limbs in maintaining daily life activities. It functions as an interface between the outside world and the brain, such as positioning, moving, touching, feeling, and grasping objects. It can perform fine motor skills precisely, thanks to its high degree of freedom of hand and its complex and flexible structure. This study proposes a dynamic human hand model with 15 degrees of freedom for rehabilitation purposes, reflecting the aforesaid abilities with significant accuracy. For the finger biomechanics design, finger joint lengths, angular workspace ranges, and joint torques were determined experimentally. Besides, joint torques during finger extension/flexion movements were calculated with the SolidWorks (SW) motion analysis and Ansys static structural analysis. To identify finger joint relationships, the workspaces for all fingers were computed and visualized during flexion/extension movements. Unlike the literature, the hand model includes a biomechanics computational analysis approach that makes it easy to adapt to hand models. The search demonstrates that using optimum comparative data for design parameters and fingers workspace ranges yields a cost-effective result for manufacturing a precision hand robot.
{"title":"Developing a finger joint biomechanics through dynamic hand model","authors":"V. Yegin, M. Onat","doi":"10.1680/jemmr.21.00182","DOIUrl":"https://doi.org/10.1680/jemmr.21.00182","url":null,"abstract":"The human hand is one of the main limbs in maintaining daily life activities. It functions as an interface between the outside world and the brain, such as positioning, moving, touching, feeling, and grasping objects. It can perform fine motor skills precisely, thanks to its high degree of freedom of hand and its complex and flexible structure. This study proposes a dynamic human hand model with 15 degrees of freedom for rehabilitation purposes, reflecting the aforesaid abilities with significant accuracy. For the finger biomechanics design, finger joint lengths, angular workspace ranges, and joint torques were determined experimentally. Besides, joint torques during finger extension/flexion movements were calculated with the SolidWorks (SW) motion analysis and Ansys static structural analysis. To identify finger joint relationships, the workspaces for all fingers were computed and visualized during flexion/extension movements. Unlike the literature, the hand model includes a biomechanics computational analysis approach that makes it easy to adapt to hand models. The search demonstrates that using optimum comparative data for design parameters and fingers workspace ranges yields a cost-effective result for manufacturing a precision hand robot.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49516615","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}
This work focuses on the creep characteristics of shock wave surface treated aluminium nanocomposites for aerospace and defence applications. Aluminium nanocomposites were undergone a surface treatment in shock tube with free piston (STFP) setup condition. The indentation creep study of shock wave surface treated Al – 4.9 Mg alloy (AA5083) reinforced with multi walled carbon nanotubes (MWCNT) nanoparticle with varying weight fraction of MWCNT nanoparticles was tested under two stresses such as 113 MPa and 170 MPa at different temperatures ranges from 473 K to 573 K. The base and nanocomposite materials were developed using a semi-solid state casting method. The instantaneous shock material reaction is characterised by carbide formation of the developed 1.5 wt% and 1.75 wt% nanocomposites. From the obtained results of creep study, shown that the nanocomposites with 1.5 wt% and 1.75 wt% of MWCNT have better creep resistance and stress exponent value at high working temperature compared to base alloy material. The enhanced creep resistance is due to the increased addition of MWCNT nanoparticle into the Al – 4.9 Mg matrix material and nanostructured carbide formation. The attained stress exponent values propose the major creep mechanism in the base alloy and nanocomposite materials was grain boundary sliding.
{"title":"Creep behaviour of shock wave surface treated aluminium – MWCNT nanocomposites","authors":"P. Kumar, P. M. Mashinini, M. A. Khan","doi":"10.1680/jemmr.21.00126","DOIUrl":"https://doi.org/10.1680/jemmr.21.00126","url":null,"abstract":"This work focuses on the creep characteristics of shock wave surface treated aluminium nanocomposites for aerospace and defence applications. Aluminium nanocomposites were undergone a surface treatment in shock tube with free piston (STFP) setup condition. The indentation creep study of shock wave surface treated Al – 4.9 Mg alloy (AA5083) reinforced with multi walled carbon nanotubes (MWCNT) nanoparticle with varying weight fraction of MWCNT nanoparticles was tested under two stresses such as 113 MPa and 170 MPa at different temperatures ranges from 473 K to 573 K. The base and nanocomposite materials were developed using a semi-solid state casting method. The instantaneous shock material reaction is characterised by carbide formation of the developed 1.5 wt% and 1.75 wt% nanocomposites. From the obtained results of creep study, shown that the nanocomposites with 1.5 wt% and 1.75 wt% of MWCNT have better creep resistance and stress exponent value at high working temperature compared to base alloy material. The enhanced creep resistance is due to the increased addition of MWCNT nanoparticle into the Al – 4.9 Mg matrix material and nanostructured carbide formation. The attained stress exponent values propose the major creep mechanism in the base alloy and nanocomposite materials was grain boundary sliding.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45951387","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}
Sachin Singh, A. K. Sharma, P. Lohia, D. K. Dwivedi, Sadanand, H. Fouad, M. S. Akhtar
Present study proposed three new Kretschmann configuration based heterostructure surface plasmon resonance sensor for biomolecule detection. The thickness of silver, silicon and heterostructures BlueP/MoS2 layers are optimized under the consideration of less reflectivity, full width at half maxima and enhanced sensitivity. After thickness optimization, the performance parameters of the proposed SPR sensor have also been calculated in terms of sensitivity, quality factor, and detection accuracy. The performance effected by increasing the number of heterostructure BlueP/MoS2 layer is also analyzed. It is also observed that Si layer plays an important role to enhance all performance parameters when it is deposited between silver and heterostructure BlueP/MoS2 layer. The optimized sensitivity at wavelength 633 nm of the heterostructure BlueP/MoS2 monolayer and silicon layer is 282°RIU−1. The highest optimized sensitivity 328°RIU>−1 is achieved with two layers of heterostructure BlueP/MoS2 having thickness of silicon layer 5 nm. It is found that sensitivity is increased by 16% when number of heterostructure layers has changed. Another important parameter like detection accuracy, quality factor, Full width at half maximum have been also calculated for proposed SPR sensor. The TM (transverse magnetic) field plot and PD (penetration depth) 138.25 nm of the proposed SPR sensor have been also calculated.
{"title":"Sensitivity enhancement of SPR biosensor employing heterostructure blue phosphorus/MoS2 and silicon layer","authors":"Sachin Singh, A. K. Sharma, P. Lohia, D. K. Dwivedi, Sadanand, H. Fouad, M. S. Akhtar","doi":"10.1680/jemmr.22.00009","DOIUrl":"https://doi.org/10.1680/jemmr.22.00009","url":null,"abstract":"Present study proposed three new Kretschmann configuration based heterostructure surface plasmon resonance sensor for biomolecule detection. The thickness of silver, silicon and heterostructures BlueP/MoS2 layers are optimized under the consideration of less reflectivity, full width at half maxima and enhanced sensitivity. After thickness optimization, the performance parameters of the proposed SPR sensor have also been calculated in terms of sensitivity, quality factor, and detection accuracy. The performance effected by increasing the number of heterostructure BlueP/MoS2 layer is also analyzed. It is also observed that Si layer plays an important role to enhance all performance parameters when it is deposited between silver and heterostructure BlueP/MoS2 layer. The optimized sensitivity at wavelength 633 nm of the heterostructure BlueP/MoS2 monolayer and silicon layer is 282°RIU−1. The highest optimized sensitivity 328°RIU>−1 is achieved with two layers of heterostructure BlueP/MoS2 having thickness of silicon layer 5 nm. It is found that sensitivity is increased by 16% when number of heterostructure layers has changed. Another important parameter like detection accuracy, quality factor, Full width at half maximum have been also calculated for proposed SPR sensor. The TM (transverse magnetic) field plot and PD (penetration depth) 138.25 nm of the proposed SPR sensor have been also calculated.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48479433","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}
Developing outstanding halide solid state electrolytes (SSE) has attracted a lot of attentions in the area of all-solid-state batteries (ASSBs), owing to their excellent compatibilities towards the high voltage active materials. In the halide compounds, Li+ ions are usually confined in the center of octahedron units, which seriously impede the fast transportation of Li+ ions. However, the representative SSEs, Li3YCl6 and Li3InCl6, present ultrafast ionic conductivities below 0.1 mS cm−1 at room temperature, which may have close connections with their particular configurations. Through the assessments on the transportation mechanisms in Li3YCl6 and Li3InCl6 by the careful DFT simulations, two kinds of Li+ ion diffusion channels can be identified. Besides, the overall performances of Li3YCl6 and Li3InCl6, including energetic stability, electronic chemical window, electronic structures, are systematically studied. It will bring deep insights and reliable criteria to explore next generation halide solid state electrolytes.
开发优异的卤化物固态电解质(SSE)因其与高压活性材料的良好兼容性而受到全固态电池领域的广泛关注。在卤化物化合物中，Li+离子通常被限制在八面体单元的中心，这严重阻碍了Li+离子的快速运输。然而，具有代表性的ssi, Li3YCl6和Li3InCl6，在室温下表现出低于0.1 mS cm−1的超快离子电导率，这可能与其特殊的结构密切相关。通过细致的DFT模拟对Li3YCl6和Li3InCl6中的输运机制进行评价，可以识别出两种Li+离子的扩散通道。此外，系统地研究了Li3YCl6和Li3InCl6的能量稳定性、电子化学窗口、电子结构等综合性能。它将为探索下一代卤化物固态电解质带来深刻的见解和可靠的标准。
{"title":"Li+ transportation mechanisms in the halide solid state electrolytes Li3YCl6 and Li3InCl6","authors":"Xiaoping Jia, Meng Zhou, Rui Zhang, Guangyou Li","doi":"10.1680/jemmr.21.00062","DOIUrl":"https://doi.org/10.1680/jemmr.21.00062","url":null,"abstract":"Developing outstanding halide solid state electrolytes (SSE) has attracted a lot of attentions in the area of all-solid-state batteries (ASSBs), owing to their excellent compatibilities towards the high voltage active materials. In the halide compounds, Li+ ions are usually confined in the center of octahedron units, which seriously impede the fast transportation of Li+ ions. However, the representative SSEs, Li3YCl6 and Li3InCl6, present ultrafast ionic conductivities below 0.1 mS cm−1 at room temperature, which may have close connections with their particular configurations. Through the assessments on the transportation mechanisms in Li3YCl6 and Li3InCl6 by the careful DFT simulations, two kinds of Li+ ion diffusion channels can be identified. Besides, the overall performances of Li3YCl6 and Li3InCl6, including energetic stability, electronic chemical window, electronic structures, are systematically studied. It will bring deep insights and reliable criteria to explore next generation halide solid state electrolytes.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44479363","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}
Over the years, the photovoltaic market, worldwide, has been witnessing double digit growth rate. The silicon solar cell manufacturing technology has evolved to optimally utilize raw materials to address this growth. One of the ways in which manufacturers are addressing the challenge is by increasing the cell size and making thinner wafers. With this change in parameters, understanding the metal contact formation in solar cells becomes paramount to improve their efficiency. Screen printing is a widely used method to form metal contacts on solar cells and is ideally suited for large volume manufacturing. This paper presents a review of the: (i) role of screen printing in various solar cell architectures, and (ii) existing models for current conduction and contact formation mechanisms. An alternate approach to current conduction and contact formation mechanism in silicon solar cells is proposed.
{"title":"Screen printed contacts for crystalline silicon solar cells -an overview","authors":"Vishal Mehta, B. Sopori, N. Ravindra","doi":"10.1680/jemmr.22.00021","DOIUrl":"https://doi.org/10.1680/jemmr.22.00021","url":null,"abstract":"Over the years, the photovoltaic market, worldwide, has been witnessing double digit growth rate. The silicon solar cell manufacturing technology has evolved to optimally utilize raw materials to address this growth. One of the ways in which manufacturers are addressing the challenge is by increasing the cell size and making thinner wafers. With this change in parameters, understanding the metal contact formation in solar cells becomes paramount to improve their efficiency. Screen printing is a widely used method to form metal contacts on solar cells and is ideally suited for large volume manufacturing. This paper presents a review of the: (i) role of screen printing in various solar cell architectures, and (ii) existing models for current conduction and contact formation mechanisms. An alternate approach to current conduction and contact formation mechanism in silicon solar cells is proposed.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44897217","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}
Concrete materials having decreased water-absorption traits are optimum for some construction applications. Hydrophobicity accompanied by a decreased water absorption in a concrete material can be achieved through its formulation with hydrophobic silica particles. Despite this effect of hydrophobic additions to concrete, the water absorption and hydrophobicity of the final concrete materials can be affected by the water affinity of the coarse aggregates used for their preparation. The role of these coarse aggregates was studied in concrete with added hydrophobic silica particles and prepared with three coarse aggregates having marked differences in their water absorptions: quartz rocks (low), igneous andesitic rocks (medium) and igneous basaltic rocks (high). The hydrophobicity and water-absorption traits of the concrete materials depended on the coarse aggregates used in their preparations. The materials prepared with quartz as coarse aggregates produced less water-absorbing materials. In contrast, the use of igneous basaltic rocks produced materials with greater absorption. A pretreatment involving impregnation of the igneous basaltic rocks with hydrophobic particles before their use in the preparation of concrete material caused a significantly decreased water absorption.
{"title":"The role of coarse aggregates in hydrophobized hydraulic concrete","authors":"Ernesto Mora, E. Castellón","doi":"10.1680/jemmr.21.00027","DOIUrl":"https://doi.org/10.1680/jemmr.21.00027","url":null,"abstract":"Concrete materials having decreased water-absorption traits are optimum for some construction applications. Hydrophobicity accompanied by a decreased water absorption in a concrete material can be achieved through its formulation with hydrophobic silica particles. Despite this effect of hydrophobic additions to concrete, the water absorption and hydrophobicity of the final concrete materials can be affected by the water affinity of the coarse aggregates used for their preparation. The role of these coarse aggregates was studied in concrete with added hydrophobic silica particles and prepared with three coarse aggregates having marked differences in their water absorptions: quartz rocks (low), igneous andesitic rocks (medium) and igneous basaltic rocks (high). The hydrophobicity and water-absorption traits of the concrete materials depended on the coarse aggregates used in their preparations. The materials prepared with quartz as coarse aggregates produced less water-absorbing materials. In contrast, the use of igneous basaltic rocks produced materials with greater absorption. A pretreatment involving impregnation of the igneous basaltic rocks with hydrophobic particles before their use in the preparation of concrete material caused a significantly decreased water absorption.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47426970","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 paper, the construction, and operation of a locally design cold plasma reactor are described. The anode diameter effect is studied in three inner diameters 5 mm, 10 mm, and 15 mm. This effect on the discharge and plasma characteristics is studied using oxygen and argon gases. It was found that the optimum diameter is 10 mm. Moreover, the plasma density and temperature are investigated using a cylindrical Langmuir probe at the optimum diameter. It is found that the electron temperature reaches 1.6 eV and the electron density reaches 2.3x108 cm−3 in the case of oxygen gas. On the other hand the X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR) analysis are used for chractrized the manganese cobalt doped ferrite (Mn0.5Co0.5Fe2O4) nanoparticles sample before and after oxygen plasma irradiation. The obtained results showed that cold plasma reactor is constructed with high efficiency to meet the required applications such as surface modification, plasma deposition and etching.
{"title":"Design, characterization and applications of direct current plasma source","authors":"A. Atta, A. M. Abdel reheem, H. El-Khabeary","doi":"10.1680/jemmr.22.00008","DOIUrl":"https://doi.org/10.1680/jemmr.22.00008","url":null,"abstract":"In this paper, the construction, and operation of a locally design cold plasma reactor are described. The anode diameter effect is studied in three inner diameters 5 mm, 10 mm, and 15 mm. This effect on the discharge and plasma characteristics is studied using oxygen and argon gases. It was found that the optimum diameter is 10 mm. Moreover, the plasma density and temperature are investigated using a cylindrical Langmuir probe at the optimum diameter. It is found that the electron temperature reaches 1.6 eV and the electron density reaches 2.3x108 cm−3 in the case of oxygen gas. On the other hand the X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR) analysis are used for chractrized the manganese cobalt doped ferrite (Mn0.5Co0.5Fe2O4) nanoparticles sample before and after oxygen plasma irradiation. The obtained results showed that cold plasma reactor is constructed with high efficiency to meet the required applications such as surface modification, plasma deposition and etching.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45351004","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}
Nowadays, optical filters with high-level performances are highly demanded. While examining the light transmission properties of both periodic and random one-dimensional photonic crystals, it is observed that the random 1D photonic structures have more favorable properties to meet these demands. With the influence of randomness, the novel single and dual-channel narrowband filters at 1550 nm wavelength for optical telecommunication are presented in this study. For designing the narrowband filters, the central wavelength precision, quality factor, and peak transmission are of great importance. The randomness can be attained by permuting the refractive indices of two dielectric materials via the binomial coefficient method. Wherein the light transmission properties are calculated using the Transfer Matrix Method. The proposed filters show ultra-narrowband transmission peaks with the very minimum Full Width at Half Maximum of 0.24 nm in the single-channel narrowband filter; 0.08 nm and 0.095 nm in the dual-channel narrowband filter at the chosen spectral region than the existing narrowband filters based on the defective 1D photonic structures.
{"title":"1D randomised photonic crystals: the influence as single and dual channel narrowband filter","authors":"L. R., P. Aruna Priya, C. Nayak","doi":"10.1680/jemmr.21.00178","DOIUrl":"https://doi.org/10.1680/jemmr.21.00178","url":null,"abstract":"Nowadays, optical filters with high-level performances are highly demanded. While examining the light transmission properties of both periodic and random one-dimensional photonic crystals, it is observed that the random 1D photonic structures have more favorable properties to meet these demands. With the influence of randomness, the novel single and dual-channel narrowband filters at 1550 nm wavelength for optical telecommunication are presented in this study. For designing the narrowband filters, the central wavelength precision, quality factor, and peak transmission are of great importance. The randomness can be attained by permuting the refractive indices of two dielectric materials via the binomial coefficient method. Wherein the light transmission properties are calculated using the Transfer Matrix Method. The proposed filters show ultra-narrowband transmission peaks with the very minimum Full Width at Half Maximum of 0.24 nm in the single-channel narrowband filter; 0.08 nm and 0.095 nm in the dual-channel narrowband filter at the chosen spectral region than the existing narrowband filters based on the defective 1D photonic structures.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44662381","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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