Pub Date : 2024-01-26DOI: 10.1149/2162-8777/ad232f
B. Chaibi, A. Loudiki, A. Hrioua, F. Laghrib, A. Farahi, M. Bakasse, S. Lahrich, M. A. El Mhammedi
Microparticles of tin and tin oxide scattered on natural phosphate (Sn-SnO2)-NPh were thermally prepared and then used as a modifier of a graphite electrode for amoxicillin (AMX) detection using DPV amd characterized by FTIR, SEM and XRD. The Sn formation was confirmed by the appearance of their corresponding peaks in the XRD pattern. In addition, the transformation of Sn into SnO2 and Ca(SnO4) and SnF4 as a function of temperature was observed. The charge transfers resistance (Rct) value of the (Sn-SnO2)-NPh-CPE is 71.07 Ω, indicating a higher electron transfer capacity compared to NPh-CPE (92.32 Ω) and CPE (108.5 Ω). Also, it has a high surface area. This result indicates that the synergetic interaction between these materials structures increased the electrochemical activity. The AMX oxidation at the (Sn-SnO2)-NPh-CPE is controlled by a diffusion process with the transfer of two electrons. The quantification provided a good linear relationship in the range of AMX concentration from 7.0 × 10-7 to 1.0 × 10-5 mol L-1 with a correlation coefficient of 0.982. The detection limit was calculated as 1.89 × 10-7 mol L-1. Satisfactory results were obtained from the detection of the AMX in different samples using the prepared electrode.
{"title":"Synthesis of Tin /Tin Oxide (Sn-SnO2) Microparticles Scattered on Natural Phosphate and Its Utilization in Capturing Amoxicillin Antibiotic in Real Water Samples","authors":"B. Chaibi, A. Loudiki, A. Hrioua, F. Laghrib, A. Farahi, M. Bakasse, S. Lahrich, M. A. El Mhammedi","doi":"10.1149/2162-8777/ad232f","DOIUrl":"https://doi.org/10.1149/2162-8777/ad232f","url":null,"abstract":"\u0000 Microparticles of tin and tin oxide scattered on natural phosphate (Sn-SnO2)-NPh were thermally prepared and then used as a modifier of a graphite electrode for amoxicillin (AMX) detection using DPV amd characterized by FTIR, SEM and XRD. The Sn formation was confirmed by the appearance of their corresponding peaks in the XRD pattern. In addition, the transformation of Sn into SnO2 and Ca(SnO4) and SnF4 as a function of temperature was observed. The charge transfers resistance (Rct) value of the (Sn-SnO2)-NPh-CPE is 71.07 Ω, indicating a higher electron transfer capacity compared to NPh-CPE (92.32 Ω) and CPE (108.5 Ω). Also, it has a high surface area. This result indicates that the synergetic interaction between these materials structures increased the electrochemical activity. The AMX oxidation at the (Sn-SnO2)-NPh-CPE is controlled by a diffusion process with the transfer of two electrons. The quantification provided a good linear relationship in the range of AMX concentration from 7.0 × 10-7 to 1.0 × 10-5 mol L-1 with a correlation coefficient of 0.982. The detection limit was calculated as 1.89 × 10-7 mol L-1. Satisfactory results were obtained from the detection of the AMX in different samples using the prepared electrode.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139593158","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 : 2024-01-25DOI: 10.1149/2162-8777/ad228b
Sangeeta D. Palekar, J. Kalambe, R. Patrikar
The pursuit of rapid diagnosis has resulted in considerable advances in blood parameter sensing technologies. As technology advances, there may be challenges in equitable access for all individuals due to economic constraints, advanced expertise, limited accessibility in particular places, or insufficient infrastructure. Here, a simple, cost-efficient, benchtop biochemical blood-sensing platform was developed for detecting crucial blood parameters for multiple disease diagnosis. Colorimetric and image processing techniques were used to evaluate color intensity. A CMOS image sensor was utilized to capture images to calculate optical density for sensing. The platform was assessed with blood serum samples, including Albumin, Gamma Glutamyl Transferase, Alpha Amylase, Alkaline Phosphatase, Bilirubin, and Total Protein within clinically relevant limits. The platform had excellent limits of detection for these parameters, which are critical for diagnosing liver and kidney-related diseases (0.27g/dL, 0.86IU/L, 1.24IU/L, 0.97IU/L, 0.24mg/dL, 0.35g/dL, respectively). Machine learning algorithms were used to estimate targeted blood parameter concentrations from optical density readings, with 98.48% accuracy and reduced incubation time by nearly 80%. The proposed platform was compared to commercial analyzers, which demonstrate excellent accuracy and reproducibility with remarkable precision (0.03 to 0.71%CV). The platform's robust stability of 99.84% was shown via stability analysis, indicating its practical applicability.
{"title":"Machine-Learning-Assisted Blood Parameter Sensing Platform for Rapid Next Generation Biomedical and Healthcare Applications","authors":"Sangeeta D. Palekar, J. Kalambe, R. Patrikar","doi":"10.1149/2162-8777/ad228b","DOIUrl":"https://doi.org/10.1149/2162-8777/ad228b","url":null,"abstract":"\u0000 The pursuit of rapid diagnosis has resulted in considerable advances in blood parameter sensing technologies. As technology advances, there may be challenges in equitable access for all individuals due to economic constraints, advanced expertise, limited accessibility in particular places, or insufficient infrastructure. Here, a simple, cost-efficient, benchtop biochemical blood-sensing platform was developed for detecting crucial blood parameters for multiple disease diagnosis. Colorimetric and image processing techniques were used to evaluate color intensity. A CMOS image sensor was utilized to capture images to calculate optical density for sensing. The platform was assessed with blood serum samples, including Albumin, Gamma Glutamyl Transferase, Alpha Amylase, Alkaline Phosphatase, Bilirubin, and Total Protein within clinically relevant limits. The platform had excellent limits of detection for these parameters, which are critical for diagnosing liver and kidney-related diseases (0.27g/dL, 0.86IU/L, 1.24IU/L, 0.97IU/L, 0.24mg/dL, 0.35g/dL, respectively). Machine learning algorithms were used to estimate targeted blood parameter concentrations from optical density readings, with 98.48% accuracy and reduced incubation time by nearly 80%. The proposed platform was compared to commercial analyzers, which demonstrate excellent accuracy and reproducibility with remarkable precision (0.03 to 0.71%CV). The platform's robust stability of 99.84% was shown via stability analysis, indicating its practical applicability.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139597096","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 : 2024-01-25DOI: 10.1149/2162-8777/ad228c
George Mili, Zohming Liana, Brinda Bhowmick
Metal oxide semiconductor gas sensors are used in various roles and sectors compared to other sensing technology due to their durability, longevity, and sensing capability. The current work proposes a dual-stacked heterogeneous source lateral n-type tunnel field-effect transistor (DSHS-nTFET) for gas sensing applications. In the device’s tunneling junction, the presence of source stack boosts the electric field, reduces tunneling width, and then enhances the band-to-band tunneling. Catalytic metals used as gate contacts for this double source stacking TFET design are explored for the purpose of detecting specific gases. Platinum (Pt), Cobalt (Co), Palladium (Pd), and Silver (Ag) are the metal gate electrodes utilised to sense the target gases, like Carbon-monoxide (CO), Ammonia (NH3), Hydrogen (H2), and Oxygen (O2), respectively. With the aid of the Sentaurus TCAD simulator, the suggested structure has been examined for a number of electrical parameters including electric field, surface potential, drain current, and numerous sensing characteristics pertaining to adsorption of gas molecules. The sensitivity and reliability of the proposed sensor have also been investigated with respect to temperature fluctuations, and it has been shown that the device is largely stable over the 200–400 K range.
{"title":"Sensitivity Analysis of a Double Source Stack Lateral TFET-Based Gas Sensor","authors":"George Mili, Zohming Liana, Brinda Bhowmick","doi":"10.1149/2162-8777/ad228c","DOIUrl":"https://doi.org/10.1149/2162-8777/ad228c","url":null,"abstract":"\u0000 Metal oxide semiconductor gas sensors are used in various roles and sectors compared to other sensing technology due to their durability, longevity, and sensing capability. The current work proposes a dual-stacked heterogeneous source lateral n-type tunnel field-effect transistor (DSHS-nTFET) for gas sensing applications. In the device’s tunneling junction, the presence of source stack boosts the electric field, reduces tunneling width, and then enhances the band-to-band tunneling. Catalytic metals used as gate contacts for this double source stacking TFET design are explored for the purpose of detecting specific gases. Platinum (Pt), Cobalt (Co), Palladium (Pd), and Silver (Ag) are the metal gate electrodes utilised to sense the target gases, like Carbon-monoxide (CO), Ammonia (NH3), Hydrogen (H2), and Oxygen (O2), respectively. With the aid of the Sentaurus TCAD simulator, the suggested structure has been examined for a number of electrical parameters including electric field, surface potential, drain current, and numerous sensing characteristics pertaining to adsorption of gas molecules. The sensitivity and reliability of the proposed sensor have also been investigated with respect to temperature fluctuations, and it has been shown that the device is largely stable over the 200–400 K range.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139598796","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 : 2024-01-23DOI: 10.1149/2162-8777/ad2197
Haruka Itoh, T. Yanagishita
Anodic porous alumina (APA) membranes with a high density of uniformly sized pores are promising materials for microfiltration. However, such membranes obtained by anodizing Al are amorphous, chemically less stable, and cannot be used to filter acidic or basic solutions. The chemical stability of APA membranes can be improved by heat treatment at temperatures above 1000ºC, resulting in membrane filters with excellent chemical stabilities. However, such a high-temperature treatment makes APA membranes brittle owing to alumina crystallization, which reduces their mechanical strength and makes them less durable. In this study, a membrane filter with both chemical resistance and mechanical strength was fabricated by coating an APA membrane with a TiO2 layer by atomic layer deposition (ALD). The resulting membrane filters showed improved chemical stability in acidic and basic solutions because the TiO2 layer coated on the surface of the APA membrane protected the membrane against its dissolution. In addition, the resulting TiO2-coated APA membrane retained its high mechanical strength, as the membrane itself was not exposed to high-temperature conditions during TiO2 coating by ALD, and the crystallization of the alumina layer did not proceed. The obtained TiO2-coated APA membranes are promising as microfiltration membranes applicable to acidic and basic solutions.
阳极氧化多孔氧化铝（APA）膜具有高密度的大小均匀的孔隙，是一种很有前景的微过滤材料。然而，通过阳极氧化铝获得的这种膜是无定形的，化学稳定性较差，不能用于过滤酸性或碱性溶液。通过在 1000ºC 以上的温度下进行热处理，可以提高 APA 膜的化学稳定性，从而获得化学稳定性极佳的膜过滤器。然而，这种高温处理会使 APA 膜因氧化铝结晶而变脆，从而降低其机械强度，降低其耐用性。在本研究中，通过原子层沉积（ALD）技术在 APA 膜上涂覆一层 TiO2，制造出了一种既具有耐化学性又具有机械强度的膜过滤器。由于涂覆在 APA 膜表面的 TiO2 层能保护膜不被溶解，因此制得的膜过滤器在酸性和碱性溶液中的化学稳定性都有所提高。此外，在 ALD 镀 TiO2 的过程中，膜本身没有暴露在高温条件下，氧化铝层也没有结晶，因此镀了 TiO2 的 APA 膜保持了很高的机械强度。获得的 TiO2 涂层 APA 膜有望成为适用于酸性和碱性溶液的微滤膜。
{"title":"Anodic Porous Alumina Membranes with Chemical Stability Improved by Atomic Layer Deposition Coating of TiO2","authors":"Haruka Itoh, T. Yanagishita","doi":"10.1149/2162-8777/ad2197","DOIUrl":"https://doi.org/10.1149/2162-8777/ad2197","url":null,"abstract":"\u0000 Anodic porous alumina (APA) membranes with a high density of uniformly sized pores are promising materials for microfiltration. However, such membranes obtained by anodizing Al are amorphous, chemically less stable, and cannot be used to filter acidic or basic solutions. The chemical stability of APA membranes can be improved by heat treatment at temperatures above 1000ºC, resulting in membrane filters with excellent chemical stabilities. However, such a high-temperature treatment makes APA membranes brittle owing to alumina crystallization, which reduces their mechanical strength and makes them less durable. In this study, a membrane filter with both chemical resistance and mechanical strength was fabricated by coating an APA membrane with a TiO2 layer by atomic layer deposition (ALD). The resulting membrane filters showed improved chemical stability in acidic and basic solutions because the TiO2 layer coated on the surface of the APA membrane protected the membrane against its dissolution. In addition, the resulting TiO2-coated APA membrane retained its high mechanical strength, as the membrane itself was not exposed to high-temperature conditions during TiO2 coating by ALD, and the crystallization of the alumina layer did not proceed. The obtained TiO2-coated APA membranes are promising as microfiltration membranes applicable to acidic and basic solutions.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139603756","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 : 2024-01-23DOI: 10.1149/2162-8777/ad2199
Bittu Singh, M. Kuppam, Bhaskaraiah M., Pushpalatha Kavuluri, Rajendra Joshi, Bhuwan Chandra
We present an investigation into the structural and magnetic properties of neodymium-doped cobalt ferrites, described by the general formula CoNdxFe2-xO4 (where x=0, 0.02, 0.04, 0.06, 0.08 & 0.10). CoNdxFe2-xO4 nanoparticles were synthesized using sol-gel auto-combustion method with tartaric acid employed as a chelating agent. The strength of the X-Ray diffraction (XRD) peak diminishes as the concentration of Nd3+ increases from 0 to 0.10 mol%, implying that crystallization is hindered due to relatively large ion radii. The crystallite size decreases from 22 nm to 12 nm, with an increase in Nd3+ concentration from 0 to 0.1 mol% in CoFe2O4. Scanning electron microscopy (SEM) studies reveal irregularly shaped particles with a homogenous distribution. The hysteresis loop obtained from the Vibrating-sample magnetometer (VSM) indicates the formation of soft magnetic materials, with magnetization values decreasing from 53 emu/g (x=0) to 40 emu/g (x=0.10) at 3K and from 32 emu/g (x=0) to 20 emu/g (x=0.10) at 300K. Interestingly, the highest coercivity and highest anisotropy constant (K) were observed for the sample x=0.04.
{"title":"Structural and Temperature Dependent-Magnetic and Dielectric Properties of CoNdxFe2-xO4 (0≤ x ≤0.1) Nanoparticles","authors":"Bittu Singh, M. Kuppam, Bhaskaraiah M., Pushpalatha Kavuluri, Rajendra Joshi, Bhuwan Chandra","doi":"10.1149/2162-8777/ad2199","DOIUrl":"https://doi.org/10.1149/2162-8777/ad2199","url":null,"abstract":"\u0000 We present an investigation into the structural and magnetic properties of neodymium-doped cobalt ferrites, described by the general formula CoNdxFe2-xO4 (where x=0, 0.02, 0.04, 0.06, 0.08 & 0.10). CoNdxFe2-xO4 nanoparticles were synthesized using sol-gel auto-combustion method with tartaric acid employed as a chelating agent. The strength of the X-Ray diffraction (XRD) peak diminishes as the concentration of Nd3+ increases from 0 to 0.10 mol%, implying that crystallization is hindered due to relatively large ion radii. The crystallite size decreases from 22 nm to 12 nm, with an increase in Nd3+ concentration from 0 to 0.1 mol% in CoFe2O4. Scanning electron microscopy (SEM) studies reveal irregularly shaped particles with a homogenous distribution. The hysteresis loop obtained from the Vibrating-sample magnetometer (VSM) indicates the formation of soft magnetic materials, with magnetization values decreasing from 53 emu/g (x=0) to 40 emu/g (x=0.10) at 3K and from 32 emu/g (x=0) to 20 emu/g (x=0.10) at 300K. Interestingly, the highest coercivity and highest anisotropy constant (K) were observed for the sample x=0.04.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139604391","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 : 2024-01-23DOI: 10.1149/2162-8777/ad2198
Abeer Talha, talaat Meaz, A. M. elnahrawy
SrCu(1-x) CrxO2 nanoparticles (x=0.0, 0.6, 1.2, and 1.8) nanoparticles were synthesized using sol-gel processing and subjected to calcination at 650°C. The investigation delved into the influence of varying chromium concentrations on the structural, FTIR, electrical, and antimicrobial characteristics. The microstructure of the SrCu(1-x)CrxO2 nanoparticles (x=0.0, 0.6, 1.2, and 1.8) nanoparticles were analyzed through X-ray diffraction and transmission electron microscopy. Additionally, changes in chemical bonds were observed as the Cr content increased. The dielectric parameters exhibit an increase with higher Cr ratios. Additionally, there is a decrease in these parameters as the frequency rises, which could be attributed to the mobility of charged particles within the SrCu(1-x)CrxO2 nanostructure. Our investigation underscores the significant role of Cr incorporation in influencing both the dielectric properties and antimicrobial activity of Cr, emphasizing its relevance for diverse applications.
{"title":"Adjusting the Effects of Cr3+ Doping on Structural, Dielectric, Antimicrobial properties of Delafossite SrCuO2 Nanoparticle","authors":"Abeer Talha, talaat Meaz, A. M. elnahrawy","doi":"10.1149/2162-8777/ad2198","DOIUrl":"https://doi.org/10.1149/2162-8777/ad2198","url":null,"abstract":"\u0000 SrCu(1-x) CrxO2 nanoparticles (x=0.0, 0.6, 1.2, and 1.8) nanoparticles were synthesized using sol-gel processing and subjected to calcination at 650°C. The investigation delved into the influence of varying chromium concentrations on the structural, FTIR, electrical, and antimicrobial characteristics. The microstructure of the SrCu(1-x)CrxO2 nanoparticles (x=0.0, 0.6, 1.2, and 1.8) nanoparticles were analyzed through X-ray diffraction and transmission electron microscopy. Additionally, changes in chemical bonds were observed as the Cr content increased. The dielectric parameters exhibit an increase with higher Cr ratios. Additionally, there is a decrease in these parameters as the frequency rises, which could be attributed to the mobility of charged particles within the SrCu(1-x)CrxO2 nanostructure. Our investigation underscores the significant role of Cr incorporation in influencing both the dielectric properties and antimicrobial activity of Cr, emphasizing its relevance for diverse applications.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139604200","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 : 2024-01-23DOI: 10.1149/2162-8777/ad2196
Manisha Thakur, C. S. Sandhu, R. Jotania, Shaban I. Hussein, A. K. Srivastava
The present report comprehensively investigates the influence of sol-gel synthesized cobalt and zinc-substituted SrFe12O19 on the morphological, structural, dielectric, and electrical characteristics. XRD analysis revealed that the substituents successfully replaced Fe3+ ions, leading to the existence of a single-phase magneto-plumbite structure of M-type hexaferrite. The crystallite size decreases from 48.94 nm to 45.9 nm as the level of substitution increases in SrM hexaferrite. With increasing the substitution level, SEM micrographs exhibited the formation of grain clusters. The electrical parameters had been investigated in the 20 Hz to 2 MHz frequency range. In the low-frequency region, both dielectric constant and loss tangent decreased with Co-Zn substitution. Sr〖Co〗_0.8 〖Zn〗_0.8 〖Fe〗_10.4 O_19 sample shows the minimum value of AC conductivity 3.95×10-5 Ω-1m-1 in the high-frequency region. Both the electric modulus and impedance spectra exhibit non-Debye behavior in all samples. The Cole-Cole plots (M'' versus M') reveal the existence of a single semicircular arc in the x = 0.0 sample, caused by the grain boundary contribution.
{"title":"Experimental and Theoretical Realization of Morphology and Frequency Tuned Charge Transport Dynamics in Co-Zn Doped SrM Hexaferrite: Electrical, Impedance and Relaxation Realm","authors":"Manisha Thakur, C. S. Sandhu, R. Jotania, Shaban I. Hussein, A. K. Srivastava","doi":"10.1149/2162-8777/ad2196","DOIUrl":"https://doi.org/10.1149/2162-8777/ad2196","url":null,"abstract":"\u0000 The present report comprehensively investigates the influence of sol-gel synthesized cobalt and zinc-substituted SrFe12O19 on the morphological, structural, dielectric, and electrical characteristics. XRD analysis revealed that the substituents successfully replaced Fe3+ ions, leading to the existence of a single-phase magneto-plumbite structure of M-type hexaferrite. The crystallite size decreases from 48.94 nm to 45.9 nm as the level of substitution increases in SrM hexaferrite. With increasing the substitution level, SEM micrographs exhibited the formation of grain clusters. The electrical parameters had been investigated in the 20 Hz to 2 MHz frequency range. In the low-frequency region, both dielectric constant and loss tangent decreased with Co-Zn substitution. Sr〖Co〗_0.8 〖Zn〗_0.8 〖Fe〗_10.4 O_19 sample shows the minimum value of AC conductivity 3.95×10-5 Ω-1m-1 in the high-frequency region. Both the electric modulus and impedance spectra exhibit non-Debye behavior in all samples. The Cole-Cole plots (M'' versus M') reveal the existence of a single semicircular arc in the x = 0.0 sample, caused by the grain boundary contribution.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139604682","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 : 2024-01-23DOI: 10.1149/2162-8777/ad2195
Prasanth M, Ravi Nirlakalla, Thyagarajan K
The study focused on investigating the thermal, structural, and luminescent properties of bismuth borate glasses doped with erbium (Er3+) ions and modified with Gd2O3, K2O, and Li2O (BBGKL: Erx) aiming for fiber lasers. Two glass transition temperatures were observed at 381 (Tg1) and 471 K (Tg2) for BBGKL glass. O1s de-convolution spectrum bridging oxygens for BBGKL glass, including B-O, Bi-O, Li2O, and K2O, were discovered by X-ray photoelectron spectroscopy. Both the photoluminescence 4I13/2→4I15/2 NIR and the absorption bands from the UV-visible-near infrared (NIR) spectrum were found to occur at 1531 nm for BBGKL: Er. Luminescence quenching was not noticed up to 3.0 mol% of Er3+ ion concentration. The BBGKL: Er0.5 glass has a remarkable connection between its absorbance and emission cross-sections of 0.77 and 0.82 x 10-20 cm2, respectively. The longest lifetime of green emission for the 4S3/2→4I15/2 transition was found for BBGKL: Er2.0 glass at 10.6 µs and 1531 nm NIR emission for the 4I13/2→4I15/2 transition of BBGKL: Er0.5 glass was 0.77 ms. In the 1413-1728 nm NIR band region for BBGKL:Er3.0, high-optical-gain cross-section G(λ) was promising for the population inversion at γ=0.6. These findings suggest that the BBGKL: Er0.5 glass would prove helpful in NIR fiber laser applications
{"title":"Erbium-Ion-Doped Bismuth Borate Glasses for High Optical Gain NIR Fiber Laser Applications","authors":"Prasanth M, Ravi Nirlakalla, Thyagarajan K","doi":"10.1149/2162-8777/ad2195","DOIUrl":"https://doi.org/10.1149/2162-8777/ad2195","url":null,"abstract":"\u0000 The study focused on investigating the thermal, structural, and luminescent properties of bismuth borate glasses doped with erbium (Er3+) ions and modified with Gd2O3, K2O, and Li2O (BBGKL: Erx) aiming for fiber lasers. Two glass transition temperatures were observed at 381 (Tg1) and 471 K (Tg2) for BBGKL glass. O1s de-convolution spectrum bridging oxygens for BBGKL glass, including B-O, Bi-O, Li2O, and K2O, were discovered by X-ray photoelectron spectroscopy. Both the photoluminescence 4I13/2→4I15/2 NIR and the absorption bands from the UV-visible-near infrared (NIR) spectrum were found to occur at 1531 nm for BBGKL: Er. Luminescence quenching was not noticed up to 3.0 mol% of Er3+ ion concentration. The BBGKL: Er0.5 glass has a remarkable connection between its absorbance and emission cross-sections of 0.77 and 0.82 x 10-20 cm2, respectively. The longest lifetime of green emission for the 4S3/2→4I15/2 transition was found for BBGKL: Er2.0 glass at 10.6 µs and 1531 nm NIR emission for the 4I13/2→4I15/2 transition of BBGKL: Er0.5 glass was 0.77 ms. In the 1413-1728 nm NIR band region for BBGKL:Er3.0, high-optical-gain cross-section G(λ) was promising for the population inversion at γ=0.6. These findings suggest that the BBGKL: Er0.5 glass would prove helpful in NIR fiber laser applications","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139605011","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 : 2024-01-22DOI: 10.1149/2162-8777/ad2110
Muhammad Bilal, Farooq Ahmad, Sidra Zawar, Umer Waqas, Muhammad Ahmed Khan, S. Ramay, S. Atiq
Mixed transition metal oxides have become highly effective electrode materials due to their remarkable cyclic stability and improved capacitance, which has consequently lead them to display exceptional electrochemical performance. In this work, a facile synthesis of Sr2Fe2O5/reduced graphene oxide composites was carried out through solvothermal technique to investigate the electrochemical performance. X-ray diffraction patterns confirmed cubic perovskite structure of Sr2Fe2O5. The morphological analysis revealed well-defined grains with sharp boundaries, having uniformly distributed porous regions. The stoichiometric ratios of sample compositions were confirmed using elemental analysis. The electrolyte employed for the electrochemical characterizations was 1 M potassium hydroxide (KOH), carried-out using three-electrode cell. The composite sample Sr2Fe2O5/15% reduced graphene oxide showed excellent electrochemical performance compared to other samples. It demonstrated maximum specific capacitance of ⁓360.29 F g−1 at a lower scan rate of 0.01 V s−1, as observed using cyclic voltammetry. The electrochemical analysis of this electrode through the GCD system has a high value of capacitance ⁓1110 F g−1 followed by a high energy density value of ⁓32.76 Wh/kg, respectively. The Nyquist plot revealed less barrier to charge transfer. Therefore, the comprehensive investigation of this electrode material suggested that this as-synthesized composite could be utilized in high-performance energy storage devices.
混合过渡金属氧化物因其显著的循环稳定性和更高的电容而成为高效电极材料，并因此显示出卓越的电化学性能。本研究通过溶热技术轻松合成了 Sr2Fe2O5/还原氧化石墨烯复合材料，并对其电化学性能进行了研究。X 射线衍射图样证实了 Sr2Fe2O5 的立方包晶结构。形态分析表明，晶粒清晰，边界锐利，具有均匀分布的多孔区域。通过元素分析确认了样品成分的化学计量比。电化学特性分析采用的电解质是 1 M 氢氧化钾（KOH），使用三电极电池进行。与其他样品相比，Sr2Fe2O5/15% 还原氧化石墨烯复合样品表现出优异的电化学性能。根据循环伏安法的观察，在 0.01 V s-1 的较低扫描速率下，它的最大比电容为 ⁓360.29 F g-1。通过 GCD 系统对该电极进行的电化学分析显示，其电容值⁓1110 F g-1 较高，能量密度值⁓32.76 Wh/kg。奈奎斯特图显示电荷转移障碍较小。因此，对这种电极材料的综合研究表明，这种合成的复合材料可用于高性能储能装置。
{"title":"Optimized Charge Dynamics of Sr2Co2O5/rGO Composite Electrodes: Redefining Supercapacitor Efficiency","authors":"Muhammad Bilal, Farooq Ahmad, Sidra Zawar, Umer Waqas, Muhammad Ahmed Khan, S. Ramay, S. Atiq","doi":"10.1149/2162-8777/ad2110","DOIUrl":"https://doi.org/10.1149/2162-8777/ad2110","url":null,"abstract":"\u0000 Mixed transition metal oxides have become highly effective electrode materials due to their remarkable cyclic stability and improved capacitance, which has consequently lead them to display exceptional electrochemical performance. In this work, a facile synthesis of Sr2Fe2O5/reduced graphene oxide composites was carried out through solvothermal technique to investigate the electrochemical performance. X-ray diffraction patterns confirmed cubic perovskite structure of Sr2Fe2O5. The morphological analysis revealed well-defined grains with sharp boundaries, having uniformly distributed porous regions. The stoichiometric ratios of sample compositions were confirmed using elemental analysis. The electrolyte employed for the electrochemical characterizations was 1 M potassium hydroxide (KOH), carried-out using three-electrode cell. The composite sample Sr2Fe2O5/15% reduced graphene oxide showed excellent electrochemical performance compared to other samples. It demonstrated maximum specific capacitance of ⁓360.29 F g−1 at a lower scan rate of 0.01 V s−1, as observed using cyclic voltammetry. The electrochemical analysis of this electrode through the GCD system has a high value of capacitance ⁓1110 F g−1 followed by a high energy density value of ⁓32.76 Wh/kg, respectively. The Nyquist plot revealed less barrier to charge transfer. Therefore, the comprehensive investigation of this electrode material suggested that this as-synthesized composite could be utilized in high-performance energy storage devices.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139606271","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 : 2024-01-18DOI: 10.1149/2162-8777/ad201c
Dinesh Chawla, Manoj Nayak, Pallav Gupta
The endeavour of this research work is to scrutinize the effect of the reinforcement materials silicon carbide (SiC) and graphite (Gr) on the mechanical properties of Al-Mg-Si alloy (AA-6061). Samples of the composites were fabricated using the stir casting technique, incorporating four weight (wt.) ratio of individual reinforcement and two different sizes of the particles. SiC, a resilient ceramic, and graphite were chosen as reinforcement to estimate their shared impact on the mechanical characteristics of the composite. Hybrid metal matrix composite (MMCs) were created with varying weight percentage of 4%, 3%, 2%, and 1% for the above selected reinforcements separately with two combinations of the particle dimensions: System-I (SiC-25 µm and Graphite- 75µm) and System-II (SiC-5 µm and Graphite- 25 µm). Mechanical characterization of composite samples including hardness, wear rate, compressive strength, was analyzed for both System-I and System-II. Scanning electron microscopy was employed for microstructure analysis, and X-ray diffraction was used for phase identifications. Mechanical characterization revealed both System-I & II with uniform dispersion of reinforcement particles. System-I exhibited higher density and lower wear resistance compared to System-II under all load conditions.
{"title":"Investigating the Effect of Particle Sizes of SiC and Graphite on Strengthening of Aluminium Metal Matrix Composites","authors":"Dinesh Chawla, Manoj Nayak, Pallav Gupta","doi":"10.1149/2162-8777/ad201c","DOIUrl":"https://doi.org/10.1149/2162-8777/ad201c","url":null,"abstract":"\u0000 The endeavour of this research work is to scrutinize the effect of the reinforcement materials silicon carbide (SiC) and graphite (Gr) on the mechanical properties of Al-Mg-Si alloy (AA-6061). Samples of the composites were fabricated using the stir casting technique, incorporating four weight (wt.) ratio of individual reinforcement and two different sizes of the particles. SiC, a resilient ceramic, and graphite were chosen as reinforcement to estimate their shared impact on the mechanical characteristics of the composite. Hybrid metal matrix composite (MMCs) were created with varying weight percentage of 4%, 3%, 2%, and 1% for the above selected reinforcements separately with two combinations of the particle dimensions: System-I (SiC-25 µm and Graphite- 75µm) and System-II (SiC-5 µm and Graphite- 25 µm). Mechanical characterization of composite samples including hardness, wear rate, compressive strength, was analyzed for both System-I and System-II. Scanning electron microscopy was employed for microstructure analysis, and X-ray diffraction was used for phase identifications. Mechanical characterization revealed both System-I & II with uniform dispersion of reinforcement particles. System-I exhibited higher density and lower wear resistance compared to System-II under all load conditions.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139614744","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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