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":" 5","pages":""},"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":"24 1","pages":"0"},"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}
Pub Date : 2023-05-01DOI: 10.15251/jobm.2023.152.65
C. Upadhyay, R. Kothari
Silver sulfide nanoparticles have gained applications in industrial areas due to their tunable physical, chemical, and biological properties. Among various nanoparticles silver sulfide nanoparticles have gained worldwide attention due to their assessment as an anti-microbial agent. The microstructure of nanostructured silver sulfide nanoparticles determine its electronic, structural, optical and electrical properties, and possible applications of silver sulfide nanoparticles in modern electronics, biology and medicine. The appearance of nonstoichiometry in silver sub-lattices of monoclinic silver sulfide at decreasing size particles to the nanometer scale is considered. The interdependent changes in non-stoichiometry and crystal structure at the transformation of a non- conducting nano crystalline silver sulfide in super-ionic conductors are also very important aspects in biosynthesis of Silver sulfide nanoparticles. The effect of nano crystalline state on the peculiarities of crystal structure, non-stoichiometry, optical and thermal properties of bio synthesized Silver sulfide nanoparticles are explained. Silver sulfide nanoparticle have provide a significant role in the biomedical field for various application- oriented products such as IR cameras, solar panels, optical fiber and filters. Among modern biomedical potential of silver sulfide nanoparticles tremendous interest is oriented towards the therapeutically enhanced personalized health care practices. The biosynthesized silver sulfide nanoparticle using aqueous extract of Cinnamomum leaves has been documented in our present research work. The presence of secondary metabolites like flavonoid, tannins, steroid, cardiac glycosides, and alkaloids was confirmed by phytochemical analyses of the aqueous extract of Cinnamomum tamala leaves and these secondary metabolites can be used as reducing stabilizing and capping agent. After three months, the biosynthesized Silver sulfide nanoparticles were found to be stable without the evidence of agglomeration at room temperature. Structural and morphological properties of Silver sulfide nanoparticles were analyzed by UV-VIS, FT-IR, XRD, EDX, TEM, and SEM spectroscopic techniques. The surface Plasmon resonance for Silver sulfide nanoparticles was obtained around 290nm. Biosynthesized Silver sulfide nanoparticles was spherical in shape with effective diameter size of 50nm.Our novel approach provides a promising and effective method to large scale synthesis of eco-friendly, and cost effective pharmacologically active silver sulfide nano particles.
{"title":"Anti–oxidant and anti-inflammation activities of nanostructured assemblies of silver sulfide nanoparticles using an extract of Cinnamomum tamala leaves","authors":"C. Upadhyay, R. Kothari","doi":"10.15251/jobm.2023.152.65","DOIUrl":"https://doi.org/10.15251/jobm.2023.152.65","url":null,"abstract":"Silver sulfide nanoparticles have gained applications in industrial areas due to their tunable physical, chemical, and biological properties. Among various nanoparticles silver sulfide nanoparticles have gained worldwide attention due to their assessment as an anti-microbial agent. The microstructure of nanostructured silver sulfide nanoparticles determine its electronic, structural, optical and electrical properties, and possible applications of silver sulfide nanoparticles in modern electronics, biology and medicine. The appearance of nonstoichiometry in silver sub-lattices of monoclinic silver sulfide at decreasing size particles to the nanometer scale is considered. The interdependent changes in non-stoichiometry and crystal structure at the transformation of a non- conducting nano crystalline silver sulfide in super-ionic conductors are also very important aspects in biosynthesis of Silver sulfide nanoparticles. The effect of nano crystalline state on the peculiarities of crystal structure, non-stoichiometry, optical and thermal properties of bio synthesized Silver sulfide nanoparticles are explained. Silver sulfide nanoparticle have provide a significant role in the biomedical field for various application- oriented products such as IR cameras, solar panels, optical fiber and filters. Among modern biomedical potential of silver sulfide nanoparticles tremendous interest is oriented towards the therapeutically enhanced personalized health care practices. The biosynthesized silver sulfide nanoparticle using aqueous extract of Cinnamomum leaves has been documented in our present research work. The presence of secondary metabolites like flavonoid, tannins, steroid, cardiac glycosides, and alkaloids was confirmed by phytochemical analyses of the aqueous extract of Cinnamomum tamala leaves and these secondary metabolites can be used as reducing stabilizing and capping agent. After three months, the biosynthesized Silver sulfide nanoparticles were found to be stable without the evidence of agglomeration at room temperature. Structural and morphological properties of Silver sulfide nanoparticles were analyzed by UV-VIS, FT-IR, XRD, EDX, TEM, and SEM spectroscopic techniques. The surface Plasmon resonance for Silver sulfide nanoparticles was obtained around 290nm. Biosynthesized Silver sulfide nanoparticles was spherical in shape with effective diameter size of 50nm.Our novel approach provides a promising and effective method to large scale synthesis of eco-friendly, and cost effective pharmacologically active silver sulfide nano particles.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47404067","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 : 2023-04-01DOI: 10.15251/jobm.2023.152.55
Uzair Majeed, I. Tariq, M. Wasib, M. K. Mustafa
Silicon nitride thin films were deposited on the one-sided P-type polished boron-doped silicon wafer substrate via RF magnetron sputtering using stochimetric silicon nitride target at various target-to-substrate distances. Target to substrate spacing, a nonconventional parameter, was varied to optimize the surface roughness and grain size. This optimization provided a normal distribution of homogenous, densely packed silicon nitride thin film free of surface cracks.. Atomic Force Microscopy was employed to explore the accurate surface roughness parameters of Silicon nitride thin films. The surface roughness and grain analysis for all samples exhibited a direct relation to each other and have an inverse correlation with the target to substrate spacing. The surface morphology of Si3N4 was analyzed by the following parameters; average roughness, root-mean square roughness, maximum peak to valley height, ten-point average roughness, skewness, and kurtosis of the line. The surface roughness of silicon nitride films has notable significance in the manufacturing of bio-sensor based on silicon nitride waveguides.
{"title":"Surface study of RF magnetron sputtered silicon nitride thin films","authors":"Uzair Majeed, I. Tariq, M. Wasib, M. K. Mustafa","doi":"10.15251/jobm.2023.152.55","DOIUrl":"https://doi.org/10.15251/jobm.2023.152.55","url":null,"abstract":"Silicon nitride thin films were deposited on the one-sided P-type polished boron-doped silicon wafer substrate via RF magnetron sputtering using stochimetric silicon nitride target at various target-to-substrate distances. Target to substrate spacing, a nonconventional parameter, was varied to optimize the surface roughness and grain size. This optimization provided a normal distribution of homogenous, densely packed silicon nitride thin film free of surface cracks.. Atomic Force Microscopy was employed to explore the accurate surface roughness parameters of Silicon nitride thin films. The surface roughness and grain analysis for all samples exhibited a direct relation to each other and have an inverse correlation with the target to substrate spacing. The surface morphology of Si3N4 was analyzed by the following parameters; average roughness, root-mean square roughness, maximum peak to valley height, ten-point average roughness, skewness, and kurtosis of the line. The surface roughness of silicon nitride films has notable significance in the manufacturing of bio-sensor based on silicon nitride waveguides.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46569471","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 : 2023-01-01DOI: 10.15251/jobm.2023.151.43
M. H. Naeem, S. H. Hadi Al-Nesrawy, M. H. Al-Maamori
This present work, includes the preparation of rubber batches containing silicone rubber (SIR) (80pphr) and polyurethane (PU) (20pphr) with micro-lead powder in different loading, respectively (0,20.40,60,80,100,150,200,250,300pphr). The mechanical properties measured the device universal tensometer, such as tensile strength, elongation and modulus of elasticity, according standard specified of (ASTM D-412) were followed and the hardness property measured by (Hardness Shore A) was put through its steps according to the standard specification (ASTMD-1415). The results were selected, and the sample (10) consisting of (SIR 80/PU20 and micro-lead 300pphr) was chosen because it is more suitable for the required mechanical properties. The results observed that the ratios of micro-lead loading increased, the tensile and elongation decreased, and the hardness and elastic modulus increased. Rubber batches reinforced with micro-lead were exposed to an infrared (FTIR) test device with the addition of hexane, where there were no changes in the infrared spectrum of the rubber composites (SIR80/PU20/Micro-Pb). Sample No. (10) was shown that the scanning electron microscope (SEM) before and after adding hexane, where it was noted that the image (A) without hexane, the absence of homogeneity of lead. As for image (B) in the presence of hexane, we note the homogeneity of lead and the distribution of lead equally, so that radiation examination were measured the Geiger counter of two sources of radioactive elements were used, the caesium source Cs137 and the cobalt source Co60. The radiation is attenuated through the material, while the thickness of the half (X1/2) gradually contrasts according to the attenuation of the radiation. This work is applied in the applications of shields as a protective suit against harmful radiation.
本论文主要研究了硅橡胶(SIR) (80pphr)和聚氨酯(PU) (20pphr)的橡胶批次的制备，微铅粉的掺量分别为0、20.40、60、80、100、150、200、250、300pphr。采用ASTM d -1415标准对设备万能拉力仪测得的拉伸强度、伸长率、弹性模量等力学性能进行了测试，并按ASTM d -1415标准对硬度计进行了测试。对结果进行了选择，选择了由(SIR 80/PU20和微铅300pphr)组成的样品(10)，因为它更适合所需的力学性能。结果表明:微铅加载比增大，拉伸率和伸长率降低，硬度和弹性模量增大;在正己烷的加入下，将微铅增强橡胶批暴露在红外(FTIR)测试装置中，橡胶复合材料(SIR80/PU20/Micro-Pb)的红外光谱没有变化。样品没有。(10)显示了添加己烷前后的扫描电子显微镜(SEM)，其中可以注意到，图像(A)中没有添加己烷，铅的均匀性不存在。对于正己烷存在下的图像(B)，我们注意到铅的均匀性和铅的均匀分布，因此使用铯源Cs137和钴源Co60两种放射性元素源的盖革计数器进行辐射检测。辐射通过材料衰减，而一半(X1/2)的厚度根据辐射的衰减逐渐变化。该研究成果可应用于作为防护服的防护罩，以抵御有害辐射。
{"title":"Preparation and mechanical characterization of (rubber blend - micro lead) rubbery composites for shielding application","authors":"M. H. Naeem, S. H. Hadi Al-Nesrawy, M. H. Al-Maamori","doi":"10.15251/jobm.2023.151.43","DOIUrl":"https://doi.org/10.15251/jobm.2023.151.43","url":null,"abstract":"This present work, includes the preparation of rubber batches containing silicone rubber (SIR) (80pphr) and polyurethane (PU) (20pphr) with micro-lead powder in different loading, respectively (0,20.40,60,80,100,150,200,250,300pphr). The mechanical properties measured the device universal tensometer, such as tensile strength, elongation and modulus of elasticity, according standard specified of (ASTM D-412) were followed and the hardness property measured by (Hardness Shore A) was put through its steps according to the standard specification (ASTMD-1415). The results were selected, and the sample (10) consisting of (SIR 80/PU20 and micro-lead 300pphr) was chosen because it is more suitable for the required mechanical properties. The results observed that the ratios of micro-lead loading increased, the tensile and elongation decreased, and the hardness and elastic modulus increased. Rubber batches reinforced with micro-lead were exposed to an infrared (FTIR) test device with the addition of hexane, where there were no changes in the infrared spectrum of the rubber composites (SIR80/PU20/Micro-Pb). Sample No. (10) was shown that the scanning electron microscope (SEM) before and after adding hexane, where it was noted that the image (A) without hexane, the absence of homogeneity of lead. As for image (B) in the presence of hexane, we note the homogeneity of lead and the distribution of lead equally, so that radiation examination were measured the Geiger counter of two sources of radioactive elements were used, the caesium source Cs137 and the cobalt source Co60. The radiation is attenuated through the material, while the thickness of the half (X1/2) gradually contrasts according to the attenuation of the radiation. This work is applied in the applications of shields as a protective suit against harmful radiation.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44724632","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 : 2023-01-01DOI: 10.15251/jobm.2023.151.11
J. Kumari, C. Singh, R. Agrawal, B. L. Choudhary, A. Verma
The ab-initio calculations have been executed for structural, electronic and optical properties of LiAlTe2, LiGaTe2 and LiInTe2 chalcopyrite structured solids and these calculations are grounded on the principle of density functional theory employed into the full potential augmented plane wave method. The computed lattice constants oscillating from a = 6.257 Å to 6.450 Å and c = 12.044 Å to 12.256 Å for LiXTe2 (X=Al, Ga and In) and also these values consistent with experimentally existed lattice constants. From the study of electronic band-gap, it confirms that these compounds are good semiconductors with direct band-gaps from 2.22 eV, 1.48 eV and 1.61 eV for LiXTe2 (X=Al, Ga and In). The result of optical properties confirms that these chalcopyrite semiconductors can be the fortunate compounds for the photovoltaic applications.
{"title":"Investigations of physical properties of lithium-based chalcopyrite semiconductors: non-toxic materials for photovoltaic applications","authors":"J. Kumari, C. Singh, R. Agrawal, B. L. Choudhary, A. Verma","doi":"10.15251/jobm.2023.151.11","DOIUrl":"https://doi.org/10.15251/jobm.2023.151.11","url":null,"abstract":"The ab-initio calculations have been executed for structural, electronic and optical properties of LiAlTe2, LiGaTe2 and LiInTe2 chalcopyrite structured solids and these calculations are grounded on the principle of density functional theory employed into the full potential augmented plane wave method. The computed lattice constants oscillating from a = 6.257 Å to 6.450 Å and c = 12.044 Å to 12.256 Å for LiXTe2 (X=Al, Ga and In) and also these values consistent with experimentally existed lattice constants. From the study of electronic band-gap, it confirms that these compounds are good semiconductors with direct band-gaps from 2.22 eV, 1.48 eV and 1.61 eV for LiXTe2 (X=Al, Ga and In). The result of optical properties confirms that these chalcopyrite semiconductors can be the fortunate compounds for the photovoltaic applications.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43247856","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 : 2023-01-01DOI: 10.15251/jobm.2023.151.31
N. V. Krishna Prasad, B. Ramesh Naik, T. Anil Babu, S. Rajasekhar, N. Madhavi
Metamaterial (MTM) absorbers and their design have been of prime interest in view of their capability to absorb electromagnetic waves of high frequencies. Different types of MTM absorbers have been reported in the last two decades. Keeping this in view an attempt was made to review the progress of MTM absorbers in terms of the theory behind them, designing and construction. This paper reviewed the basic theory and design regulations of a perfect MTM absorber at high, narrow and broad band frequencies. Also we reviewed tunable frequency and coherent absorbers. This exercise was done to focus on recent developments in metamaterial absorbers and present the tested results in a more precise way
{"title":"Theory, design and characterization of metamaterial absorbers: a formal assessment","authors":"N. V. Krishna Prasad, B. Ramesh Naik, T. Anil Babu, S. Rajasekhar, N. Madhavi","doi":"10.15251/jobm.2023.151.31","DOIUrl":"https://doi.org/10.15251/jobm.2023.151.31","url":null,"abstract":"Metamaterial (MTM) absorbers and their design have been of prime interest in view of their capability to absorb electromagnetic waves of high frequencies. Different types of MTM absorbers have been reported in the last two decades. Keeping this in view an attempt was made to review the progress of MTM absorbers in terms of the theory behind them, designing and construction. This paper reviewed the basic theory and design regulations of a perfect MTM absorber at high, narrow and broad band frequencies. Also we reviewed tunable frequency and coherent absorbers. This exercise was done to focus on recent developments in metamaterial absorbers and present the tested results in a more precise way","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45431818","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 : 2023-01-01DOI: 10.15251/jobm.2023.151.23
N. A. Guliyeva, Rashad Gabil Abaszade, E. A. Khanmammadova, E. Azizov
Work has been carried out to improve the method for obtaining and further oxidizing Graphene Oxide (GO) to obtain functionalized layers with a large number of active centres. We have determined that with an increase in the amount of H2O2 in the synthesis, it significantly increases the efficiency of the oxidation process and increases the number of functional groups, while the amount of NaNO3 and KMnO4 remains unchanged. Fourier-Transform Infrared Spectroscopy (FTIR), X-ray analysis, Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) analyses were carried out. Based on the FTIR result, all putative functional groups for a given material (GO) were determined, such as carbonyl, hydroxyl, ketone and epoxy groups which chemically bonded with graphene. SEM and TEM drawings were analysed, which gave a broad understanding of the morphology of GO nanostructures and, based on these drawings, it is fashionable to say that the material is semi-crystalline with the presence of such byproducts as amorphous carbon nanoparticles. Based on the EDX analysis, it was proved that this nano-structured material does not have third-party products.
{"title":"Synthesis and analysis of nanostructured graphene oxide","authors":"N. A. Guliyeva, Rashad Gabil Abaszade, E. A. Khanmammadova, E. Azizov","doi":"10.15251/jobm.2023.151.23","DOIUrl":"https://doi.org/10.15251/jobm.2023.151.23","url":null,"abstract":"Work has been carried out to improve the method for obtaining and further oxidizing Graphene Oxide (GO) to obtain functionalized layers with a large number of active centres. We have determined that with an increase in the amount of H2O2 in the synthesis, it significantly increases the efficiency of the oxidation process and increases the number of functional groups, while the amount of NaNO3 and KMnO4 remains unchanged. Fourier-Transform Infrared Spectroscopy (FTIR), X-ray analysis, Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) analyses were carried out. Based on the FTIR result, all putative functional groups for a given material (GO) were determined, such as carbonyl, hydroxyl, ketone and epoxy groups which chemically bonded with graphene. SEM and TEM drawings were analysed, which gave a broad understanding of the morphology of GO nanostructures and, based on these drawings, it is fashionable to say that the material is semi-crystalline with the presence of such byproducts as amorphous carbon nanoparticles. Based on the EDX analysis, it was proved that this nano-structured material does not have third-party products.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41314354","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 : 2023-01-01DOI: 10.15251/jobm.2023.151.1
R. Sattar, M. Rasool, R. Qadir, A. Siddique, M. Irfan, I. Saba, M. T. Akhtar, M. Rehman, M. Mustaqeem
Nanoparticles have attracted considerable attention of researchers due to their diverse properties in the fields of catalysis, energy devices, wound healing and drug delivery systems . Synthesis of nanoparticles using plants and microbial extract is a green approach due to easy handling, rapidity and cost-effectiveness. This article reported a simple and green method of zinc oxide nanoparticles (ZnO-NPs) synthesis using Camellia sinensis leaves extract as reducing agent. State-of-the-art techniques were utilized for the characterization and measure the potential applications of ZnO-NPs. FTIR and SEM analysis were performed to confirm the nature of bonding and morphology of NPs. XRD analysis confirmed the hexagonal wurtzite structure and crystallite size (34 nm) of ZnONPs. EDX analysis was performed to check the purity of NPs. Energy band gap of valence band and conduction band was found 3.278 eV using UV/Visible spectrophotometry. Purified ZnO-NPs were utilized to determine the photocatalytic potential for degradation of hazardous dye (methylene blue) at λmax of 668 nm under irradiation of sunlight. The results indicated ∼92% photodecomposition of dye after 110 min of sunlight irradiation. Moreover, ZnO-NPs also revealed the antibacterial potential, having better inhibition power against gram-negative bacterial strains.
{"title":"Biogenic synthesis of zinc oxide nanoparticles using leaves extract of Camellia sinensis for photocatalytic and biological applications","authors":"R. Sattar, M. Rasool, R. Qadir, A. Siddique, M. Irfan, I. Saba, M. T. Akhtar, M. Rehman, M. Mustaqeem","doi":"10.15251/jobm.2023.151.1","DOIUrl":"https://doi.org/10.15251/jobm.2023.151.1","url":null,"abstract":"Nanoparticles have attracted considerable attention of researchers due to their diverse properties in the fields of catalysis, energy devices, wound healing and drug delivery systems . Synthesis of nanoparticles using plants and microbial extract is a green approach due to easy handling, rapidity and cost-effectiveness. This article reported a simple and green method of zinc oxide nanoparticles (ZnO-NPs) synthesis using Camellia sinensis leaves extract as reducing agent. State-of-the-art techniques were utilized for the characterization and measure the potential applications of ZnO-NPs. FTIR and SEM analysis were performed to confirm the nature of bonding and morphology of NPs. XRD analysis confirmed the hexagonal wurtzite structure and crystallite size (34 nm) of ZnONPs. EDX analysis was performed to check the purity of NPs. Energy band gap of valence band and conduction band was found 3.278 eV using UV/Visible spectrophotometry. Purified ZnO-NPs were utilized to determine the photocatalytic potential for degradation of hazardous dye (methylene blue) at λmax of 668 nm under irradiation of sunlight. The results indicated ∼92% photodecomposition of dye after 110 min of sunlight irradiation. Moreover, ZnO-NPs also revealed the antibacterial potential, having better inhibition power against gram-negative bacterial strains.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43387882","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 : 2023-01-01DOI: 10.15251/jobm.2023.153.103
Z. Zheng, Yang Liu, Y. Pei, J. Zhang, Z. W. Wang, H. Wei, Z. G. Wu, J. Li
Herein, surface-enhanced Raman scattering (SERS) and ultraviolet visible absorption spectrum in combination with fluorescence spectroscopy were jointly explored to investigate the binding interaction between Enrofloxacin (EFLX) with Bovine serum albumin (BSA) at a physiological condition. A facile SERS substrate based on the self-assembly of colloid silver on the modified TiN-Ag surface was obtained, an advanced SERS analysis method basing on this as-prepared substrate was established for sensitive and rapid detection of enrofloxacin, the most enhanced mode was that with certain motions perpendicular to the metal surface. In addition, the fluorescence and ultraviolet spectrum were allowed to found that enrofloxacin may bind to BSA site I via the carboxyl group with strong binding power.
{"title":"Quantitative prediction model for affinity of drug-target interactions based on molecular vibrations and overall system of ligand-receptor","authors":"Z. Zheng, Yang Liu, Y. Pei, J. Zhang, Z. W. Wang, H. Wei, Z. G. Wu, J. Li","doi":"10.15251/jobm.2023.153.103","DOIUrl":"https://doi.org/10.15251/jobm.2023.153.103","url":null,"abstract":"Herein, surface-enhanced Raman scattering (SERS) and ultraviolet visible absorption spectrum in combination with fluorescence spectroscopy were jointly explored to investigate the binding interaction between Enrofloxacin (EFLX) with Bovine serum albumin (BSA) at a physiological condition. A facile SERS substrate based on the self-assembly of colloid silver on the modified TiN-Ag surface was obtained, an advanced SERS analysis method basing on this as-prepared substrate was established for sensitive and rapid detection of enrofloxacin, the most enhanced mode was that with certain motions perpendicular to the metal surface. In addition, the fluorescence and ultraviolet spectrum were allowed to found that enrofloxacin may bind to BSA site I via the carboxyl group with strong binding power.","PeriodicalId":43605,"journal":{"name":"Journal of Optoelectronic and Biomedical Materials","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67044325","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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