Pub Date : 2024-06-06DOI: 10.15251/jobm.2024.162.99
R. Tamilselvi, A. Thirumoorthi
Green synthesis is a simple, eco-friendly and emerging approach of synthesizing CeriaZirconia nanocomposites (CZ NCs) and evaluates its performance for the photocatalytic treatment of industrial waste water. Ceria-Zirconia NCs were synthesized using leaf extracts of Jatropha gossypiifolia L. for the application towards photocatalytic degradation of Brilliant Green (BG) dye under visible light irradiation. The Ceria-Zirconia NCs were characterized by Fourier Transform Infrared (FT-IR) spectrometer, UV-Visible spectrophotometer, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) equipped with Energy Dispersive X-ray Spectroscopy (EDX). FT-IR spectra indicate the presence of amino, carboxyl and hydroxyl functional groups on the crystal surface of the nanocomposites. In UV-Visible spectra, the nanocomposites exhibit the highest absorbance at about 252 and 340 nm. From XRD, the average crystallite size of the CeriaZirconia NCs were found to be 80.36nm, while SEM images showed the spherical clusters of agglomerated nanocomposites. The elemental composition and the purity of the nanocomposites were confirmed by Energy Dispersive X-ray Spectroscopy. The superior antifungal activity was investigated against with the fungal strains Candida albicans, Aspergillus niger and penicillium.
绿色合成是合成氧化锆铈纳米复合材料（CZ NCs）的一种简单、环保和新兴的方法，并可评估其在光催化处理工业废水方面的性能。利用麻风树叶提取物合成了氧化铈-氧化锆纳米复合材料，用于在可见光照射下光催化降解艳绿（BG）染料。傅立叶变换红外光谱仪（FT-IR）、紫外-可见分光光度计、X 射线衍射（XRD）、配备能量色散 X 射线光谱仪（EDX）的扫描电子显微镜（SEM）对 Ceria-Zirconia NCs 进行了表征。傅立叶变换红外光谱显示，纳米复合材料的晶体表面存在氨基、羧基和羟基官能团。在紫外可见光谱中，纳米复合材料在约 252 纳米和 340 纳米处的吸光度最高。从 XRD 可以看出，氧化锆铈数控晶粒的平均结晶尺寸为 80.36nm，而扫描电镜图像则显示出纳米复合材料的球形团聚。纳米复合材料的元素组成和纯度由能量色散 X 射线光谱法证实。研究发现，纳米复合材料对白色念珠菌、黑曲霉和青霉等真菌菌株具有卓越的抗真菌活性。
{"title":"Antifungal and visible light driven photocatalytic degradation of Brilliant green dye by Ceria–Zirconia Nanocomposites","authors":"R. Tamilselvi, A. Thirumoorthi","doi":"10.15251/jobm.2024.162.99","DOIUrl":"https://doi.org/10.15251/jobm.2024.162.99","url":null,"abstract":"Green synthesis is a simple, eco-friendly and emerging approach of synthesizing CeriaZirconia nanocomposites (CZ NCs) and evaluates its performance for the photocatalytic treatment of industrial waste water. Ceria-Zirconia NCs were synthesized using leaf extracts of Jatropha gossypiifolia L. for the application towards photocatalytic degradation of Brilliant Green (BG) dye under visible light irradiation. The Ceria-Zirconia NCs were characterized by Fourier Transform Infrared (FT-IR) spectrometer, UV-Visible spectrophotometer, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) equipped with Energy Dispersive X-ray Spectroscopy (EDX). FT-IR spectra indicate the presence of amino, carboxyl and hydroxyl functional groups on the crystal surface of the nanocomposites. In UV-Visible spectra, the nanocomposites exhibit the highest absorbance at about 252 and 340 nm. From XRD, the average crystallite size of the CeriaZirconia NCs were found to be 80.36nm, while SEM images showed the spherical clusters of agglomerated nanocomposites. The elemental composition and the purity of the nanocomposites were confirmed by Energy Dispersive X-ray Spectroscopy. The superior antifungal activity was investigated against with the fungal strains Candida albicans, Aspergillus niger and penicillium.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377968","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 : 2024-05-13DOI: 10.15251/jobm.2024.162.89
M. Bouherour, A. Nabila, L. Z. Meryem, T. Nourelhouda, R. Sawsen
This research is dedicated to the development of a new technology for a quick diagnosis of virial virus, using electromagnetic technology facilitated by either a Rectangular Patch Resonator (RPR) or a Wearable Flexible Sensor (WFS) designed for non-invasive viral disease detection, including Nano-virus, and macro-virus. These devices is tailored for a precise and non-invasive detection of a wide array of viruses. To enhance diagnostic precision, an electromagnetic sensor was meticulously explored and simulated, to be capable of detecting and identifying even the most minuscule viruses. Employing numerical modeling with a focus on the 10 GHz to 20 GHz frequency range. We hold a strong sense of optimism regarding this sensor's potential for non-invasive virus detection. Extensive simulations conducted throughout this study have underscored the WFS's selectivity across all viruses, boasting an exceptional limit of detection and sensitivity. Moreover, the WFS exhibited the capability to distinguish between varying infection percentages, each corresponding to a distinct reflection pattern.
{"title":"Wearable flexible Kapton-graphene electromagnetic sensors","authors":"M. Bouherour, A. Nabila, L. Z. Meryem, T. Nourelhouda, R. Sawsen","doi":"10.15251/jobm.2024.162.89","DOIUrl":"https://doi.org/10.15251/jobm.2024.162.89","url":null,"abstract":"This research is dedicated to the development of a new technology for a quick diagnosis of virial virus, using electromagnetic technology facilitated by either a Rectangular Patch Resonator (RPR) or a Wearable Flexible Sensor (WFS) designed for non-invasive viral disease detection, including Nano-virus, and macro-virus. These devices is tailored for a precise and non-invasive detection of a wide array of viruses. To enhance diagnostic precision, an electromagnetic sensor was meticulously explored and simulated, to be capable of detecting and identifying even the most minuscule viruses. Employing numerical modeling with a focus on the 10 GHz to 20 GHz frequency range. We hold a strong sense of optimism regarding this sensor's potential for non-invasive virus detection. Extensive simulations conducted throughout this study have underscored the WFS's selectivity across all viruses, boasting an exceptional limit of detection and sensitivity. Moreover, the WFS exhibited the capability to distinguish between varying infection percentages, each corresponding to a distinct reflection pattern.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140984972","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 : 2024-05-13DOI: 10.15251/jobm.2024.162.73
S. R. Mohammed, A. Abdel-Moneim, E. S. Abdel-Reheim, H. Ramadan, Z. E. Eldin, A. El-Shahawy, A. I. Yousef
Nanotechnology can offer various non-invasive and efficient alternative delivery strategies for insulin injections to enhance the quality of life of diabetic patients. The current research was aimed to fabricate a de novo oral formula of insulin-loaded chitosan nanoparticles coated with dextrin and pectin (INS-CN/DP) to improve the bioavailability and therapeutic efficiency of oral insulin. INS-CN/DP nano-formula was prepared using ionic gelation technique and characterized by XRD, FTIR, SEM, EDX, and DLS. Insulin loading capacity and entrapment efficiency (LC%, EE%), release profile, and kinetic study was conducted for INS-CN/DP nano-formula. Next, hypoglycemic and antidiabetic efficiency of INS-CN/DP nano-formula were studied in streptozotocin-induced diabetic rats by measuring fasting and postprandial glucose, the activities of carbohydrate metabolizing enzymes, liver glycogen content, and gene expression levels of glucokinase and Glucose transporter-2. Characterization results confirmed the formation of INSCN/DP nanoparticles with LC% =26.2 ± 0.56 and EE% 69.3 ± 2.75, respectively. Size average was 282.8 nm and nearly 25% of loaded insulin released after 4 hrs vs 48% for unloaded insulin. In vivo results displayed that oral administration of INS-CN/DP nanoparticles showed highly significant hypoglycemic and antidiabetic efficacy in diabetic rats compared to unloaded oral insulin. Oral INS-CN/DP nano-formula is promising alternative for insulin injections and can be suggested as non-invasive and effective diabetes therapy
{"title":"De novo fabrication of oral insulin-loaded chitosan/dextrin/pectin nanospheres and their antidiabetic efficacy in streptozotocin-induced diabetic rats","authors":"S. R. Mohammed, A. Abdel-Moneim, E. S. Abdel-Reheim, H. Ramadan, Z. E. Eldin, A. El-Shahawy, A. I. Yousef","doi":"10.15251/jobm.2024.162.73","DOIUrl":"https://doi.org/10.15251/jobm.2024.162.73","url":null,"abstract":"Nanotechnology can offer various non-invasive and efficient alternative delivery strategies for insulin injections to enhance the quality of life of diabetic patients. The current research was aimed to fabricate a de novo oral formula of insulin-loaded chitosan nanoparticles coated with dextrin and pectin (INS-CN/DP) to improve the bioavailability and therapeutic efficiency of oral insulin. INS-CN/DP nano-formula was prepared using ionic gelation technique and characterized by XRD, FTIR, SEM, EDX, and DLS. Insulin loading capacity and entrapment efficiency (LC%, EE%), release profile, and kinetic study was conducted for INS-CN/DP nano-formula. Next, hypoglycemic and antidiabetic efficiency of INS-CN/DP nano-formula were studied in streptozotocin-induced diabetic rats by measuring fasting and postprandial glucose, the activities of carbohydrate metabolizing enzymes, liver glycogen content, and gene expression levels of glucokinase and Glucose transporter-2. Characterization results confirmed the formation of INSCN/DP nanoparticles with LC% =26.2 ± 0.56 and EE% 69.3 ± 2.75, respectively. Size average was 282.8 nm and nearly 25% of loaded insulin released after 4 hrs vs 48% for unloaded insulin. In vivo results displayed that oral administration of INS-CN/DP nanoparticles showed highly significant hypoglycemic and antidiabetic efficacy in diabetic rats compared to unloaded oral insulin. Oral INS-CN/DP nano-formula is promising alternative for insulin injections and can be suggested as non-invasive and effective diabetes therapy","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140982365","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 : 2024-03-01DOI: 10.15251/jobm.2024.161.47
N. Qamar, P. John
Selenium is known to be an important element for growth and splenic microenvironment regulation. About 5–10% of RA patients presented enlarged spleen along with low levels of selenium than the normal individuals. The current study aims to determine the effects of biogenic selenium nanoparticles (SeNPs) on the growth and spleen of healthy and arthritic mice. Biogenic SeNPs were evaluated for their adverse as well as therapeutic effects on the growth rate and splenic integrity of healthy and arthritic Balb/c mice. The tested doses of SeNPs significantly reduced the growth of mice along with splenomegaly in biosafety profiling while the treatment revealed dose-independent improvement in the growth of arthritic mice as compared to untreated arthritic control with no adverse effect on spleen. Concluding, selenium levels directly affect the growth of mice with no harm to splenic integrity in arthritic mice, however further investigation is required to develop a new method for evaluating the efficacy of Se sources.
众所周知，硒是促进生长和调节脾脏微环境的重要元素。与正常人相比，约有 5-10% 的 RA 患者会出现脾脏肿大、硒含量低的症状。本研究旨在确定生物硒纳米颗粒（SeNPs）对健康小鼠和关节炎小鼠生长和脾脏的影响。研究评估了生物硒纳米粒子对健康和关节炎 Balb/c 小鼠的生长速度和脾脏完整性的不良和治疗作用。在生物安全性分析中，测试剂量的 SeNPs 显著降低了小鼠的生长速度和脾脏肿大，而与未经治疗的关节炎对照组相比，治疗显示关节炎小鼠的生长速度改善与剂量无关，且对脾脏无不良影响。总之，硒水平直接影响小鼠的生长，对关节炎小鼠脾脏的完整性没有损害。
{"title":"Biogenic selenium nanoparticles: their dual impact on spleen and growth in arthritic mice","authors":"N. Qamar, P. John","doi":"10.15251/jobm.2024.161.47","DOIUrl":"https://doi.org/10.15251/jobm.2024.161.47","url":null,"abstract":"Selenium is known to be an important element for growth and splenic microenvironment regulation. About 5–10% of RA patients presented enlarged spleen along with low levels of selenium than the normal individuals. The current study aims to determine the effects of biogenic selenium nanoparticles (SeNPs) on the growth and spleen of healthy and arthritic mice. Biogenic SeNPs were evaluated for their adverse as well as therapeutic effects on the growth rate and splenic integrity of healthy and arthritic Balb/c mice. The tested doses of SeNPs significantly reduced the growth of mice along with splenomegaly in biosafety profiling while the treatment revealed dose-independent improvement in the growth of arthritic mice as compared to untreated arthritic control with no adverse effect on spleen. Concluding, selenium levels directly affect the growth of mice with no harm to splenic integrity in arthritic mice, however further investigation is required to develop a new method for evaluating the efficacy of Se sources.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140276360","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 : 2024-03-01DOI: 10.15251/jobm.2024.161.35
F. Bahrani, I. K. Jasim, A. Q. Abdullah
Optical characteristics of polyvinyl alcohol/Safranin O dye (PVA/SO) thin films prepared by casting technique have been examined. Compositions and crystalline features of PVA/SO thin films are investigated with X-Ray Diffraction analyses. Ultraviolet–Visible spectroscopy has been utilized to measure the absorption and transmission optical properties of the thin films through the wavelength range 300-900 nm. Two regions can be recognized in absorption coefficient related to the direct band gaps, which are about 3.93 eV of the fundamental energy gap and 2.11eV of the onset gap. The theoretical WempleDiDomenico model has been performed to quantify the static refractive index n and the dispersion energy in addition to the oscillation energy (Eo). The results reveal that the data of the refractive index dispersion in this model obeyed the single oscillator, which is used to deduce the dispersion and the high frequency dielectric constant. In the examined wavelength range, it has been investigated the complex dielectric constant of PVA/SO dye thin films. The ratio of the carrier concentration to the effective mass has been estimated. Oscillation energy values have been examined in this study by describing the expression Eo ≈ Eg and checking the Wemple-DiDomenico model. PVA/SO thin films have interesting physical properties for solar cell applications.
研究了通过浇铸技术制备的聚乙烯醇/Safranin O 染料（PVA/SO）薄膜的光学特性。通过 X 射线衍射分析研究了 PVA/SO 薄膜的组成和结晶特征。紫外-可见光谱法用于测量薄膜在 300-900 纳米波长范围内的吸收和透射光学特性。在吸收系数中可以发现两个与直接带隙有关的区域，分别是约 3.93eV 的基本能隙和 2.11eV 的起始能隙。我们采用 WempleDiDomenico 理论模型来量化静态折射率 n 和色散能以及振荡能 (Eo)。结果表明，该模型中的折射率色散数据服从单振荡器，可用于推导色散和高频介电常数。在所研究的波长范围内，研究了 PVA/SO 染料薄膜的复介电常数。还估算了载流子浓度与有效质量之比。本研究通过描述表达式 Eo ≈ Eg 和检查 Wemple-DiDomenico 模型，检查了振荡能值。PVA/SO 薄膜在太阳能电池应用方面具有有趣的物理特性。
{"title":"Investigation of optical and dispersion parameters poly vinyl alcohol doped Safranin O dye (PVA/SO) thin film","authors":"F. Bahrani, I. K. Jasim, A. Q. Abdullah","doi":"10.15251/jobm.2024.161.35","DOIUrl":"https://doi.org/10.15251/jobm.2024.161.35","url":null,"abstract":"Optical characteristics of polyvinyl alcohol/Safranin O dye (PVA/SO) thin films prepared by casting technique have been examined. Compositions and crystalline features of PVA/SO thin films are investigated with X-Ray Diffraction analyses. Ultraviolet–Visible spectroscopy has been utilized to measure the absorption and transmission optical properties of the thin films through the wavelength range 300-900 nm. Two regions can be recognized in absorption coefficient related to the direct band gaps, which are about 3.93 eV of the fundamental energy gap and 2.11eV of the onset gap. The theoretical WempleDiDomenico model has been performed to quantify the static refractive index n and the dispersion energy in addition to the oscillation energy (Eo). The results reveal that the data of the refractive index dispersion in this model obeyed the single oscillator, which is used to deduce the dispersion and the high frequency dielectric constant. In the examined wavelength range, it has been investigated the complex dielectric constant of PVA/SO dye thin films. The ratio of the carrier concentration to the effective mass has been estimated. Oscillation energy values have been examined in this study by describing the expression Eo ≈ Eg and checking the Wemple-DiDomenico model. PVA/SO thin films have interesting physical properties for solar cell applications.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140270183","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 : 2024-03-01DOI: 10.15251/jobm.2024.161.17
W. L. Li, L.S. Chuah
For the time being, solar energy has received considerable attention and development on account of its distinct advantages, such as rich reserves and no geographical restrictions. Nevertheless, in practical applications, the photovoltaic module is easily affected by external environments, which gives rise to a decrease in photovoltaic power. The maximum power point tracking (MPPT) technology for PV power system is an effective method to elevate the efficacy of photovoltaic electricity conversion. The frequently used control methods include the perturb and observe (P&O) algorithm and the incremental conductance (INC) method, and so forth; these methods vary tremendously in terms of the required parameters, algorithm complexity, tracking speed, tracking accuracy, hardware requirements etc. This work puts forth a MPPT control method on the basis of Async-PSO and INC algorithm to achieve a better performance in the MPPT. To reflect the change of light amplitude and temperature in a day, the temperature varies from 25℃ to 60℃ and irradiance from 450W/m2 to 900W/m2 . An extensively used mono-crystalline silicon PV module with 240W was considered as the research object to compare the capability of the recommended MPPT control method. MATLAB/Simulink software was adopted to model and simulate the algorithm. Aside from that, comprehensive comparisons were made with other MPPT methods to test and verify the recommended algorithm has significantly improved the tracking speed and accuracy at the maximum power point with smaller oscillations under various conditions.
{"title":"A PV MPPT control method based on async-PSO and INC algorithm under shading condition","authors":"W. L. Li, L.S. Chuah","doi":"10.15251/jobm.2024.161.17","DOIUrl":"https://doi.org/10.15251/jobm.2024.161.17","url":null,"abstract":"For the time being, solar energy has received considerable attention and development on account of its distinct advantages, such as rich reserves and no geographical restrictions. Nevertheless, in practical applications, the photovoltaic module is easily affected by external environments, which gives rise to a decrease in photovoltaic power. The maximum power point tracking (MPPT) technology for PV power system is an effective method to elevate the efficacy of photovoltaic electricity conversion. The frequently used control methods include the perturb and observe (P&O) algorithm and the incremental conductance (INC) method, and so forth; these methods vary tremendously in terms of the required parameters, algorithm complexity, tracking speed, tracking accuracy, hardware requirements etc. This work puts forth a MPPT control method on the basis of Async-PSO and INC algorithm to achieve a better performance in the MPPT. To reflect the change of light amplitude and temperature in a day, the temperature varies from 25℃ to 60℃ and irradiance from 450W/m2 to 900W/m2 . An extensively used mono-crystalline silicon PV module with 240W was considered as the research object to compare the capability of the recommended MPPT control method. MATLAB/Simulink software was adopted to model and simulate the algorithm. Aside from that, comprehensive comparisons were made with other MPPT methods to test and verify the recommended algorithm has significantly improved the tracking speed and accuracy at the maximum power point with smaller oscillations under various conditions.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140270467","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 : 2024-03-01DOI: 10.15251/jobm.2024.161.55
S. K. Jain, A. M. Joshi, C. Kirpalani
The goal of this study was to get a deeper understanding of the intricate impact of organic semiconductor thickness on the performance of devices, using a thorough and meticulous investigation at the microscopic level incorporating the density of defect model using using Silvaco ATLAS TCAD Simulator. The present work thoroughly investigates the relationship between the thickness of semiconductors and important performance parameters, such as hole concentration, electric potential, electric field, and Hole QFL. The comprehensive insights derived from this research not only enhance the comprehension of device physics but also provide a framework for the systematic enhancement of electronic devices. The widespread use of organic thin film transistors (OTFT) in future Flexible electronics, particularly in display and memory circuits, necessitates the incorporation of low voltage, high speed, and low cost characteristics.
{"title":"Performance analysis of OTFT with varying semiconductor film thickness for future flexible electronics","authors":"S. K. Jain, A. M. Joshi, C. Kirpalani","doi":"10.15251/jobm.2024.161.55","DOIUrl":"https://doi.org/10.15251/jobm.2024.161.55","url":null,"abstract":"The goal of this study was to get a deeper understanding of the intricate impact of organic semiconductor thickness on the performance of devices, using a thorough and meticulous investigation at the microscopic level incorporating the density of defect model using using Silvaco ATLAS TCAD Simulator. The present work thoroughly investigates the relationship between the thickness of semiconductors and important performance parameters, such as hole concentration, electric potential, electric field, and Hole QFL. The comprehensive insights derived from this research not only enhance the comprehension of device physics but also provide a framework for the systematic enhancement of electronic devices. The widespread use of organic thin film transistors (OTFT) in future Flexible electronics, particularly in display and memory circuits, necessitates the incorporation of low voltage, high speed, and low cost characteristics.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140269014","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 : 2024-01-01DOI: 10.15251/jobm.2024.161.1
K. Senthil Murugan, T. Mohanapriya
The purpose of synthesizing two different types of Schiff base compounds, such as 2-[(4-Nitrophenyl)Imino]MethylPhenol (2, 4- NMP) and 2-[4-MethoxyPhenyl)Imino] Methyl}Phenol (2,4-MMP), are to improve the corrosion inhibition efficiency of Mild steel (MS) using acidic solutions of 1M HCl and 0.5M H2SO4 and investigated antimicrobial activity against bacteria gram positive Staphylococcus aureus and gram negative Escherichia coli. The – NO2 and – OCH3 substituent groups effects in the Schiff base azomethine system [– CH=N] have been investigated. The Fourier transform infrared (FTIR) spectral analysis confirms a range of 1728 –1760 cm-1 , the formation of the azomethine system [-CH=N] in synthesized compounds. Besides, the potential of corrosion was investigated studied by electrochemical impedance studies (EIS), which indicated a high semicircle formed because of the high resistance of allowing the moving of electrons through the metal-electrolyte solution, besides acting as a mixed kind of inhibitor. 2,4-MMP has better inhibition behavior than 2,4-NMP. The morphology of mild steel surface was revealed by the scanning electron microscope (SEM). Thermodynamic investigation showed that two synthesized Schiff bases have Langmuir adsorption isotherms with physisorption and chemisorptions mechanisms. Quantum chemical calculations have been investigated by density functional theory (DFT). These studies concludes that 2,4-MMP has a better corrosion efficiency found as 86.1 % compared with the 2,4-NMP found as 84.2% since the electron donating ability of the substituents – OCH3 to the electron rich azomethine system [-CH=N] group. Further synthesized compounds exhibits high activity against Staphylococcus aureus and Escherichia coli due to substituted groups.
{"title":"Antimicrobial and corrosion inhibition activity of Schiff base in mild steel of HCl and H2SO4 acidic solutions","authors":"K. Senthil Murugan, T. Mohanapriya","doi":"10.15251/jobm.2024.161.1","DOIUrl":"https://doi.org/10.15251/jobm.2024.161.1","url":null,"abstract":"The purpose of synthesizing two different types of Schiff base compounds, such as 2-[(4-Nitrophenyl)Imino]MethylPhenol (2, 4- NMP) and 2-[4-MethoxyPhenyl)Imino] Methyl}Phenol (2,4-MMP), are to improve the corrosion inhibition efficiency of Mild steel (MS) using acidic solutions of 1M HCl and 0.5M H2SO4 and investigated antimicrobial activity against bacteria gram positive Staphylococcus aureus and gram negative Escherichia coli. The – NO2 and – OCH3 substituent groups effects in the Schiff base azomethine system [– CH=N] have been investigated. The Fourier transform infrared (FTIR) spectral analysis confirms a range of 1728 –1760 cm-1 , the formation of the azomethine system [-CH=N] in synthesized compounds. Besides, the potential of corrosion was investigated studied by electrochemical impedance studies (EIS), which indicated a high semicircle formed because of the high resistance of allowing the moving of electrons through the metal-electrolyte solution, besides acting as a mixed kind of inhibitor. 2,4-MMP has better inhibition behavior than 2,4-NMP. The morphology of mild steel surface was revealed by the scanning electron microscope (SEM). Thermodynamic investigation showed that two synthesized Schiff bases have Langmuir adsorption isotherms with physisorption and chemisorptions mechanisms. Quantum chemical calculations have been investigated by density functional theory (DFT). These studies concludes that 2,4-MMP has a better corrosion efficiency found as 86.1 % compared with the 2,4-NMP found as 84.2% since the electron donating ability of the substituents – OCH3 to the electron rich azomethine system [-CH=N] group. Further synthesized compounds exhibits high activity against Staphylococcus aureus and Escherichia coli due to substituted groups.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140521896","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 : 2023-12-01DOI: 10.15251/jobm.2023.154.127
R. Kothari
A novel thiosemicarbazone substituted schiff base ligand and its Cu(II) complex have been prepared and characterized. Schiff bases are considered as an important pro ligand in coordination chemistry because they easily form stable complexes with biologically active transition metal ions. Such as Cu 2+, Zn2+, Ni2+ etc. In this paper, novel Cu (II) complexes of thiosemicarbazone ligands were synthesised by refluxing thiosemicarbazone substituted pro ligands with copper salts in 1:1 molar ratio in absolute ethanol under thermal condition at 80o c for 5-6 hour. The resulting brown coloured copper complexes were filtered and recrystallized from petroleum ether. In this synthesis, we use absolute ethanol as a polar environment for the synthesis of copper complexes from schiff base ligands because the use of polar solvent medium in synthesis plays a very important role in reducing minimum possibilities of side reactions which hinders the proper conversion of ligands into copper complexes and also reducing the reaction time. All synthesized compounds were characterized through various spectroscopic and pharmacological techniques. FT-IR, UVVis, NMR, Mass, TGA-DTA, XRD spectra techniques were used to confirm the structures of copper complexes and ligands. All compounds are thermal stable up to 350o c. The good results of pharmacological activities of compounds like in-vitro anti -oxidant and anti - cancer activity against DPPH and cisplatin drug, explained the presence of biologically active functional groups are present in ligands as well as their copper complexes. Results found that the copper complexes were more active than the ligands. The synthesis of copper complexes from thiosemicarbazone schiff base ligands in proper stoichiometic ratio is an excellent method of preparing pharmacological active compounds which can be considered as good anti -cancer drug candidate for the treatment of cancer.
{"title":"Anti-cancer activity of novel Schiff base copper (II) complex: synthesis and characterization","authors":"R. Kothari","doi":"10.15251/jobm.2023.154.127","DOIUrl":"https://doi.org/10.15251/jobm.2023.154.127","url":null,"abstract":"A novel thiosemicarbazone substituted schiff base ligand and its Cu(II) complex have been prepared and characterized. Schiff bases are considered as an important pro ligand in coordination chemistry because they easily form stable complexes with biologically active transition metal ions. Such as Cu 2+, Zn2+, Ni2+ etc. In this paper, novel Cu (II) complexes of thiosemicarbazone ligands were synthesised by refluxing thiosemicarbazone substituted pro ligands with copper salts in 1:1 molar ratio in absolute ethanol under thermal condition at 80o c for 5-6 hour. The resulting brown coloured copper complexes were filtered and recrystallized from petroleum ether. In this synthesis, we use absolute ethanol as a polar environment for the synthesis of copper complexes from schiff base ligands because the use of polar solvent medium in synthesis plays a very important role in reducing minimum possibilities of side reactions which hinders the proper conversion of ligands into copper complexes and also reducing the reaction time. All synthesized compounds were characterized through various spectroscopic and pharmacological techniques. FT-IR, UVVis, NMR, Mass, TGA-DTA, XRD spectra techniques were used to confirm the structures of copper complexes and ligands. All compounds are thermal stable up to 350o c. The good results of pharmacological activities of compounds like in-vitro anti -oxidant and anti - cancer activity against DPPH and cisplatin drug, explained the presence of biologically active functional groups are present in ligands as well as their copper complexes. Results found that the copper complexes were more active than the ligands. The synthesis of copper complexes from thiosemicarbazone schiff base ligands in proper stoichiometic ratio is an excellent method of preparing pharmacological active compounds which can be considered as good anti -cancer drug candidate for the treatment of cancer.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138614182","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 : 2023-10-01DOI: 10.15251/jobm.2023.154.115
H. Idriss, A. I. Alakhras, A. Modwi
In this report, RuO2@ZnO nanostructure was synthesized, characterized, and employed for Congo Red (CR) dye removal from the aquatic phase. The influence of sorption factors contact time, pH, and concentration, was examined. The results indicates the formation of RuO2@ZnO nanostructure with surface area of 21 m2 g-1 and pore size of 23.5 nm. . The highest amount of Congo red adsorbed by RuO2@ZnO nanostructure was 102.42 mg/g. Excellent obedience was found between the equilibrium data and the Langmuir model (R2 > 0.9338), whereas the adsorption kinetics was consistent with the pseudo-second-order equation (R2 > 0.9999).
{"title":"Congo red pigment weeding out from water media via RuO2@ZnO nanostructure","authors":"H. Idriss, A. I. Alakhras, A. Modwi","doi":"10.15251/jobm.2023.154.115","DOIUrl":"https://doi.org/10.15251/jobm.2023.154.115","url":null,"abstract":"In this report, RuO2@ZnO nanostructure was synthesized, characterized, and employed for Congo Red (CR) dye removal from the aquatic phase. The influence of sorption factors contact time, pH, and concentration, was examined. The results indicates the formation of RuO2@ZnO nanostructure with surface area of 21 m2 g-1 and pore size of 23.5 nm. . The highest amount of Congo red adsorbed by RuO2@ZnO nanostructure was 102.42 mg/g. Excellent obedience was found between the equilibrium data and the Langmuir model (R2 > 0.9338), whereas the adsorption kinetics was consistent with the pseudo-second-order equation (R2 > 0.9999).","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136204826","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：