The This article is to report non toxic, green synthesis cerium oxide nanoparticles (CeO2 NPs) from ammonium ceric nitrate using Moringa oleifera leaf extract as reducing as well as stabilizing agent. The as prepared nanoparticles were characterised by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), UV-Visible diffuse reflectance spectroscopy (UV), and EDAX. The average crystallite size was estimated from the XRD pattern using Debye Scherrer equation as about 9-10 nm. XRD analysis revealed the cubic fluorite structure of the synthesized nanoparticles. FT-IR reflects stretching frequencies at 500 cm−1 which confirmed the Ce-O stretching bands and showing utilization of natural components for the production of nanoparticles. TGA predicts the successful capping of CeO2 NPs by bioactive molecules present in the plant extract. The SEM images reveal that the prepared ceria nanoparticles are composed of spherical nanoparticles in agglomerated form. The as-synthesized CeO2 nanoparticles have antibacterial activity. The desired structural and optical properties of CeO2 make it as promising material for photocatalytic and optoelectronic applications.The This article is to report non toxic, green synthesis cerium oxide nanoparticles (CeO2 NPs) from ammonium ceric nitrate using Moringa oleifera leaf extract as reducing as well as stabilizing agent. The as prepared nanoparticles were characterised by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), UV-Visible diffuse reflectance spectroscopy (UV), and EDAX. The average crystallite size was estimated from the XRD pattern using Debye Scherrer equation as about 9-10 nm. XRD analysis revealed the cubic fluorite structure of the synthesized nanoparticles. FT-IR reflects stretching frequencies at 500 cm−1 which confirmed the Ce-O stretching bands and showing utilization of natural components for the production of nanoparticles. TGA predicts the successful capping of CeO2 NPs by bioactive molecules present in the plant extract. The SEM images reveal that the prepared ceria ...
{"title":"Structural, optical and antimicrobial properties of green synthesized cerium oxide nanoparticles","authors":"P. Valsaraj, Divyarthana","doi":"10.1063/1.5130232","DOIUrl":"https://doi.org/10.1063/1.5130232","url":null,"abstract":"The This article is to report non toxic, green synthesis cerium oxide nanoparticles (CeO2 NPs) from ammonium ceric nitrate using Moringa oleifera leaf extract as reducing as well as stabilizing agent. The as prepared nanoparticles were characterised by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), UV-Visible diffuse reflectance spectroscopy (UV), and EDAX. The average crystallite size was estimated from the XRD pattern using Debye Scherrer equation as about 9-10 nm. XRD analysis revealed the cubic fluorite structure of the synthesized nanoparticles. FT-IR reflects stretching frequencies at 500 cm−1 which confirmed the Ce-O stretching bands and showing utilization of natural components for the production of nanoparticles. TGA predicts the successful capping of CeO2 NPs by bioactive molecules present in the plant extract. The SEM images reveal that the prepared ceria nanoparticles are composed of spherical nanoparticles in agglomerated form. The as-synthesized CeO2 nanoparticles have antibacterial activity. The desired structural and optical properties of CeO2 make it as promising material for photocatalytic and optoelectronic applications.The This article is to report non toxic, green synthesis cerium oxide nanoparticles (CeO2 NPs) from ammonium ceric nitrate using Moringa oleifera leaf extract as reducing as well as stabilizing agent. The as prepared nanoparticles were characterised by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), UV-Visible diffuse reflectance spectroscopy (UV), and EDAX. The average crystallite size was estimated from the XRD pattern using Debye Scherrer equation as about 9-10 nm. XRD analysis revealed the cubic fluorite structure of the synthesized nanoparticles. FT-IR reflects stretching frequencies at 500 cm−1 which confirmed the Ce-O stretching bands and showing utilization of natural components for the production of nanoparticles. TGA predicts the successful capping of CeO2 NPs by bioactive molecules present in the plant extract. The SEM images reveal that the prepared ceria ...","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83031128","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}
In this report, we have investigated the structural and lattice dynamical properties of Half Heusler alloys RuMnX (X=P, As) under the framework of first principles calculations. The structural parameters such as lattice constants have been calculated and found to be in good agreement with the available theoretical results, while bulk modulus and pressure derivative of bulk modulus has been reported for the first time. A linear response approach of density functional perturbation theory has been employed for the calculations of lattice dynamics of these alloys. The calculated phonon dispersion curve (PDC) does not show any imaginary frequency in any symmetric directions, indicating the stability of alloys in the cubic phase. All the phonon frequencies corresponding to acoustical and optical phonon modes have been assigned. Comparison of PDC of both alloys reveal that the phonon gap has been found to be more in RuMnAs than in RuMnP. Lattice dynamical properties for these alloys has been reported for the first time. The phonon density of states for both alloys have also been calculated.In this report, we have investigated the structural and lattice dynamical properties of Half Heusler alloys RuMnX (X=P, As) under the framework of first principles calculations. The structural parameters such as lattice constants have been calculated and found to be in good agreement with the available theoretical results, while bulk modulus and pressure derivative of bulk modulus has been reported for the first time. A linear response approach of density functional perturbation theory has been employed for the calculations of lattice dynamics of these alloys. The calculated phonon dispersion curve (PDC) does not show any imaginary frequency in any symmetric directions, indicating the stability of alloys in the cubic phase. All the phonon frequencies corresponding to acoustical and optical phonon modes have been assigned. Comparison of PDC of both alloys reveal that the phonon gap has been found to be more in RuMnAs than in RuMnP. Lattice dynamical properties for these alloys has been reported for the fir...
{"title":"Structural and lattice dynamical study of half Heusler alloys RuMnX (X = P, As)","authors":"Yuhit Gupta, M. M. Sinha, S. Verma","doi":"10.1063/1.5130213","DOIUrl":"https://doi.org/10.1063/1.5130213","url":null,"abstract":"In this report, we have investigated the structural and lattice dynamical properties of Half Heusler alloys RuMnX (X=P, As) under the framework of first principles calculations. The structural parameters such as lattice constants have been calculated and found to be in good agreement with the available theoretical results, while bulk modulus and pressure derivative of bulk modulus has been reported for the first time. A linear response approach of density functional perturbation theory has been employed for the calculations of lattice dynamics of these alloys. The calculated phonon dispersion curve (PDC) does not show any imaginary frequency in any symmetric directions, indicating the stability of alloys in the cubic phase. All the phonon frequencies corresponding to acoustical and optical phonon modes have been assigned. Comparison of PDC of both alloys reveal that the phonon gap has been found to be more in RuMnAs than in RuMnP. Lattice dynamical properties for these alloys has been reported for the first time. The phonon density of states for both alloys have also been calculated.In this report, we have investigated the structural and lattice dynamical properties of Half Heusler alloys RuMnX (X=P, As) under the framework of first principles calculations. The structural parameters such as lattice constants have been calculated and found to be in good agreement with the available theoretical results, while bulk modulus and pressure derivative of bulk modulus has been reported for the first time. A linear response approach of density functional perturbation theory has been employed for the calculations of lattice dynamics of these alloys. The calculated phonon dispersion curve (PDC) does not show any imaginary frequency in any symmetric directions, indicating the stability of alloys in the cubic phase. All the phonon frequencies corresponding to acoustical and optical phonon modes have been assigned. Comparison of PDC of both alloys reveal that the phonon gap has been found to be more in RuMnAs than in RuMnP. Lattice dynamical properties for these alloys has been reported for the fir...","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91361466","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}
Yash K Pandya, Nirav P. Patel, Bhavin N. Patel, Nirav Suthar
The world’s tendency toward utilizing reused materials requests new items from natural resources and waste polymers. In this work, composites made from waste rubber particles (average particle size: 320 mesh) and sisal fiber in unidirectional form with matrix material as epoxy resin were prepared by hand lay-up method & investigated the mechanical properties for the influence of waste rubber particle loading in natural fiber composite. The effect of different loading of waste rubber particle (0,5,10,20 %wt) on the tensile and flexural strength was investigated. The results represent that 5%wt waste rubber particle loading composite shows maximum tensile and flexural strength & further increase in rubber particle loading shows decrease in tensile & flexural strength.
{"title":"Investigation of tensile and flexural strength of sisal fiber reinforced epoxy composite with waste tyre rubber particle as filler","authors":"Yash K Pandya, Nirav P. Patel, Bhavin N. Patel, Nirav Suthar","doi":"10.1063/1.5130245","DOIUrl":"https://doi.org/10.1063/1.5130245","url":null,"abstract":"The world’s tendency toward utilizing reused materials requests new items from natural resources and waste polymers. In this work, composites made from waste rubber particles (average particle size: 320 mesh) and sisal fiber in unidirectional form with matrix material as epoxy resin were prepared by hand lay-up method & investigated the mechanical properties for the influence of waste rubber particle loading in natural fiber composite. The effect of different loading of waste rubber particle (0,5,10,20 %wt) on the tensile and flexural strength was investigated. The results represent that 5%wt waste rubber particle loading composite shows maximum tensile and flexural strength & further increase in rubber particle loading shows decrease in tensile & flexural strength.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85693043","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}
M. M. Antoinette, S. Israel, J. Berchmans, A. J. Amali
Nanophosphors are a blazing area which has gained momentum in the present day research due to the fabulous unique properties of nanoparticles from their respective bulk. The rare earth doped sesquioxides have received considerable attention due to its unique properties like high chemical and thermal stabilities, intense UV absorption and also its use in solid state lightings, LASERS and so on. Here, we have synthesized (Sm0.95 Ce0.05)2O3 nanocrystalline powder using combustion method. Powder X-ray diffraction was used to study the structural characterization of the synthesized sample and the result confirmed that the synthesized nanoparticles had a nanocrystalline structure with a cubic phase and Ia3¯ space group. The crystal structure and the shape of the particles have a tremendous effect on the photoluminescent properties. The surface morphology and the size of the particles were examined using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The SEM micrographs showed that t he synthesized particles appear to be spherical. The TEM results confirmed that the particles formed were spherical and in nano regime. Phosphors with spherical morphology will surely enhance the photoluminescent properties of the materials. Hence the synthesized sample will have good luminescent characteristics. The optical properties of the sample were studied using ultraviolet –visible (UV-Vis) data analysis and photoluminescence (PL) studies. The absorption peaks obtained are at 364nm, 376, 405, 464 nm and 476nm which correspond to 6H5/2 → 4D3/2, 6H5/2 → 4D1/2, 6H5/2 → 6F7/2, 6H5/2 → 4I13/2 and 6H5/2 → 4I11/2 transitions respectively. On excitation, these particles showed a strong emission at 605 nm which corresponds to 4G5/2 → 6H7/2 transition and other emissions at 563 nm and 647nm correspond to 4G5/2 → 6H5/2 and 4G5/2 → 6H5/2 transitions revealing that it is an orange-red emissive phosphor. This novel nanophosphor can offer new possibilities for the development of white light-emitting diodes (WLEDs) which can be excited by the near-UV chips and also in solid state lightings.Nanophosphors are a blazing area which has gained momentum in the present day research due to the fabulous unique properties of nanoparticles from their respective bulk. The rare earth doped sesquioxides have received considerable attention due to its unique properties like high chemical and thermal stabilities, intense UV absorption and also its use in solid state lightings, LASERS and so on. Here, we have synthesized (Sm0.95 Ce0.05)2O3 nanocrystalline powder using combustion method. Powder X-ray diffraction was used to study the structural characterization of the synthesized sample and the result confirmed that the synthesized nanoparticles had a nanocrystalline structure with a cubic phase and Ia3¯ space group. The crystal structure and the shape of the particles have a tremendous effect on the photoluminescent properties. The surface morphology and the size of t
{"title":"Photoluminescence study of (Sm0.95 Ce0.05)2O3 nanoparticles for LED applications","authors":"M. M. Antoinette, S. Israel, J. Berchmans, A. J. Amali","doi":"10.1063/1.5130326","DOIUrl":"https://doi.org/10.1063/1.5130326","url":null,"abstract":"Nanophosphors are a blazing area which has gained momentum in the present day research due to the fabulous unique properties of nanoparticles from their respective bulk. The rare earth doped sesquioxides have received considerable attention due to its unique properties like high chemical and thermal stabilities, intense UV absorption and also its use in solid state lightings, LASERS and so on. Here, we have synthesized (Sm0.95 Ce0.05)2O3 nanocrystalline powder using combustion method. Powder X-ray diffraction was used to study the structural characterization of the synthesized sample and the result confirmed that the synthesized nanoparticles had a nanocrystalline structure with a cubic phase and Ia3¯ space group. The crystal structure and the shape of the particles have a tremendous effect on the photoluminescent properties. The surface morphology and the size of the particles were examined using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The SEM micrographs showed that t he synthesized particles appear to be spherical. The TEM results confirmed that the particles formed were spherical and in nano regime. Phosphors with spherical morphology will surely enhance the photoluminescent properties of the materials. Hence the synthesized sample will have good luminescent characteristics. The optical properties of the sample were studied using ultraviolet –visible (UV-Vis) data analysis and photoluminescence (PL) studies. The absorption peaks obtained are at 364nm, 376, 405, 464 nm and 476nm which correspond to 6H5/2 → 4D3/2, 6H5/2 → 4D1/2, 6H5/2 → 6F7/2, 6H5/2 → 4I13/2 and 6H5/2 → 4I11/2 transitions respectively. On excitation, these particles showed a strong emission at 605 nm which corresponds to 4G5/2 → 6H7/2 transition and other emissions at 563 nm and 647nm correspond to 4G5/2 → 6H5/2 and 4G5/2 → 6H5/2 transitions revealing that it is an orange-red emissive phosphor. This novel nanophosphor can offer new possibilities for the development of white light-emitting diodes (WLEDs) which can be excited by the near-UV chips and also in solid state lightings.Nanophosphors are a blazing area which has gained momentum in the present day research due to the fabulous unique properties of nanoparticles from their respective bulk. The rare earth doped sesquioxides have received considerable attention due to its unique properties like high chemical and thermal stabilities, intense UV absorption and also its use in solid state lightings, LASERS and so on. Here, we have synthesized (Sm0.95 Ce0.05)2O3 nanocrystalline powder using combustion method. Powder X-ray diffraction was used to study the structural characterization of the synthesized sample and the result confirmed that the synthesized nanoparticles had a nanocrystalline structure with a cubic phase and Ia3¯ space group. The crystal structure and the shape of the particles have a tremendous effect on the photoluminescent properties. The surface morphology and the size of t","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75755988","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}
Aiswarya Anil, Sreedha Sambhudevan, C. O. Sreekala, B. Shankar
In this study, a conducting polymer PEDOT: PSS counter electrode is introduced in a typical DSSC (Dye Sensitized Solar Cell) with N719 dye adsorbed TiO2 nanoparticle coated FTO (Flourine doped Tin Oxide) glass as photo anode and an iodide-triiodide system as electrolyte. Counter electrode modification is done by introducing silver nano particles (NPs) along with PEDOT:PSS to heighten the performance of DSSCs. Five unlike counter electrodes are made by PEDOT: PSS, PEDOT:PSS+ 25wt% Ag np, PEDOT:PSS+ 50wt% Ag np, PEDOT:PSS+ 75wt% Ag np, PEDOT:PSS+ 100wt% Ag nanoparticles respectively,DSSCs are fabricated, photovoltaic parameters are measured and related with the standard platinum counter electrode. Themorphology of the counter electrodes is studied by FESEM analysis. The thickness of different photo cathodes is studied by ellipsometry. It is found that as the weight% of Silver nanoparticle is increasing the efficiency of the device is also increasing. The photovoltaic conversion efficiency of the device with PEDOT:PSS+75wt%Agnp is giving 3.75% efficiency. But for PEDOT: PSS+ 100wt% Agnp, the efficiency decreases to 3.05%. This is because as the weight percentage of silver nanoparticle increases, due to its metallic nature, it acts as a hole trapping material than the hole conducting material.In this study, a conducting polymer PEDOT: PSS counter electrode is introduced in a typical DSSC (Dye Sensitized Solar Cell) with N719 dye adsorbed TiO2 nanoparticle coated FTO (Flourine doped Tin Oxide) glass as photo anode and an iodide-triiodide system as electrolyte. Counter electrode modification is done by introducing silver nano particles (NPs) along with PEDOT:PSS to heighten the performance of DSSCs. Five unlike counter electrodes are made by PEDOT: PSS, PEDOT:PSS+ 25wt% Ag np, PEDOT:PSS+ 50wt% Ag np, PEDOT:PSS+ 75wt% Ag np, PEDOT:PSS+ 100wt% Ag nanoparticles respectively,DSSCs are fabricated, photovoltaic parameters are measured and related with the standard platinum counter electrode. Themorphology of the counter electrodes is studied by FESEM analysis. The thickness of different photo cathodes is studied by ellipsometry. It is found that as the weight% of Silver nanoparticle is increasing the efficiency of the device is also increasing. The photovoltaic conversion efficiency of the device with...
本研究将导电聚合物PEDOT: PSS对电极引入到典型的DSSC(染料敏化太阳能电池)中，以N719染料吸附TiO2纳米颗粒包覆FTO(氟掺杂氧化锡)玻璃为光阳极，碘化-三碘化体系为电解质。通过引入银纳米粒子(NPs)和PEDOT:PSS对电极进行修饰，以提高DSSCs的性能。分别用PEDOT:PSS、PEDOT:PSS+ 25wt% Ag np、PEDOT:PSS+ 50wt% Ag np、PEDOT:PSS+ 75wt% Ag np、PEDOT:PSS+ 100wt% Ag纳米粒子制备了5种不同的对电极，制备了DSSCs，测量了光伏参数，并与标准铂对电极进行了对比。用FESEM分析研究了对电极的形貌。用椭偏仪研究了不同光电阴极的厚度。研究发现，随着银纳米颗粒重量的增加，器件的效率也随之提高。PEDOT:PSS+75wt%Agnp器件的光伏转换效率为3.75%。但对于PEDOT: PSS+ 100wt% Agnp，效率下降到3.05%。这是因为随着银纳米颗粒重量百分比的增加，由于其金属性质，它作为空穴捕获材料而不是空穴导电材料。本研究将导电聚合物PEDOT: PSS对电极引入到典型的DSSC(染料敏化太阳能电池)中，以N719染料吸附TiO2纳米颗粒包覆FTO(氟掺杂氧化锡)玻璃为光阳极，碘化-三碘化体系为电解质。通过引入银纳米粒子(NPs)和PEDOT:PSS对电极进行修饰，以提高DSSCs的性能。分别用PEDOT:PSS、PEDOT:PSS+ 25wt% Ag np、PEDOT:PSS+ 50wt% Ag np、PEDOT:PSS+ 75wt% Ag np、PEDOT:PSS+ 100wt% Ag纳米粒子制备了5种不同的对电极，制备了DSSCs，测量了光伏参数，并与标准铂对电极进行了对比。用FESEM分析研究了对电极的形貌。用椭偏仪研究了不同光电阴极的厚度。研究发现，随着银纳米颗粒重量的增加，器件的效率也随之提高。器件的光电转换效率…
{"title":"Effect of silver nanoparticle in the PEDOT: PSS counter electrode of dye sensitized solar cell","authors":"Aiswarya Anil, Sreedha Sambhudevan, C. O. Sreekala, B. Shankar","doi":"10.1063/1.5130333","DOIUrl":"https://doi.org/10.1063/1.5130333","url":null,"abstract":"In this study, a conducting polymer PEDOT: PSS counter electrode is introduced in a typical DSSC (Dye Sensitized Solar Cell) with N719 dye adsorbed TiO2 nanoparticle coated FTO (Flourine doped Tin Oxide) glass as photo anode and an iodide-triiodide system as electrolyte. Counter electrode modification is done by introducing silver nano particles (NPs) along with PEDOT:PSS to heighten the performance of DSSCs. Five unlike counter electrodes are made by PEDOT: PSS, PEDOT:PSS+ 25wt% Ag np, PEDOT:PSS+ 50wt% Ag np, PEDOT:PSS+ 75wt% Ag np, PEDOT:PSS+ 100wt% Ag nanoparticles respectively,DSSCs are fabricated, photovoltaic parameters are measured and related with the standard platinum counter electrode. Themorphology of the counter electrodes is studied by FESEM analysis. The thickness of different photo cathodes is studied by ellipsometry. It is found that as the weight% of Silver nanoparticle is increasing the efficiency of the device is also increasing. The photovoltaic conversion efficiency of the device with PEDOT:PSS+75wt%Agnp is giving 3.75% efficiency. But for PEDOT: PSS+ 100wt% Agnp, the efficiency decreases to 3.05%. This is because as the weight percentage of silver nanoparticle increases, due to its metallic nature, it acts as a hole trapping material than the hole conducting material.In this study, a conducting polymer PEDOT: PSS counter electrode is introduced in a typical DSSC (Dye Sensitized Solar Cell) with N719 dye adsorbed TiO2 nanoparticle coated FTO (Flourine doped Tin Oxide) glass as photo anode and an iodide-triiodide system as electrolyte. Counter electrode modification is done by introducing silver nano particles (NPs) along with PEDOT:PSS to heighten the performance of DSSCs. Five unlike counter electrodes are made by PEDOT: PSS, PEDOT:PSS+ 25wt% Ag np, PEDOT:PSS+ 50wt% Ag np, PEDOT:PSS+ 75wt% Ag np, PEDOT:PSS+ 100wt% Ag nanoparticles respectively,DSSCs are fabricated, photovoltaic parameters are measured and related with the standard platinum counter electrode. Themorphology of the counter electrodes is studied by FESEM analysis. The thickness of different photo cathodes is studied by ellipsometry. It is found that as the weight% of Silver nanoparticle is increasing the efficiency of the device is also increasing. The photovoltaic conversion efficiency of the device with...","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75918310","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}
In this study, poly vinyl alcohol is blended with chitosan to fabricate proton exchange membrane using phase inversion method. The key parameters such as proton conductivity, methanol uptake and tensile strength were evaluated at five different proportions of the membrane. The PVA-chitosan ratio was taken as 1:5, 1:2, 1:1, 2:1 and 5:1. The resulting membranes were characterized using FTIR and TGA. The membrane displays an excellent proton conductivity of 0.0112 S/cm at a PVA-chitosan ratio 1:1, which is comparable with that of commercial Nafion membrane. From the methanol uptake value of 42.80% it can be inferred that the methanol cross over through the membrane will be less. The Thermo Gravimetric analysis of the membrane shows that the degradation of the membrane occur at 200°C -300°C which indicates that the membrane is suitable for portable applications, Also the mechanical strength of the membrane is within the desirable limit. The possibility of using this PVA-chitosan blend membrane as proton exchange membrane for direct methanol fuel cell is suggested.In this study, poly vinyl alcohol is blended with chitosan to fabricate proton exchange membrane using phase inversion method. The key parameters such as proton conductivity, methanol uptake and tensile strength were evaluated at five different proportions of the membrane. The PVA-chitosan ratio was taken as 1:5, 1:2, 1:1, 2:1 and 5:1. The resulting membranes were characterized using FTIR and TGA. The membrane displays an excellent proton conductivity of 0.0112 S/cm at a PVA-chitosan ratio 1:1, which is comparable with that of commercial Nafion membrane. From the methanol uptake value of 42.80% it can be inferred that the methanol cross over through the membrane will be less. The Thermo Gravimetric analysis of the membrane shows that the degradation of the membrane occur at 200°C -300°C which indicates that the membrane is suitable for portable applications, Also the mechanical strength of the membrane is within the desirable limit. The possibility of using this PVA-chitosan blend membrane as proton excha...
{"title":"A polyvinyl alcohol/chitosan blend proton exchange membrane for direct methanol fuel cell","authors":"K. Ambili, Shiny Joseph, A. Sidharthan","doi":"10.1063/1.5130261","DOIUrl":"https://doi.org/10.1063/1.5130261","url":null,"abstract":"In this study, poly vinyl alcohol is blended with chitosan to fabricate proton exchange membrane using phase inversion method. The key parameters such as proton conductivity, methanol uptake and tensile strength were evaluated at five different proportions of the membrane. The PVA-chitosan ratio was taken as 1:5, 1:2, 1:1, 2:1 and 5:1. The resulting membranes were characterized using FTIR and TGA. The membrane displays an excellent proton conductivity of 0.0112 S/cm at a PVA-chitosan ratio 1:1, which is comparable with that of commercial Nafion membrane. From the methanol uptake value of 42.80% it can be inferred that the methanol cross over through the membrane will be less. The Thermo Gravimetric analysis of the membrane shows that the degradation of the membrane occur at 200°C -300°C which indicates that the membrane is suitable for portable applications, Also the mechanical strength of the membrane is within the desirable limit. The possibility of using this PVA-chitosan blend membrane as proton exchange membrane for direct methanol fuel cell is suggested.In this study, poly vinyl alcohol is blended with chitosan to fabricate proton exchange membrane using phase inversion method. The key parameters such as proton conductivity, methanol uptake and tensile strength were evaluated at five different proportions of the membrane. The PVA-chitosan ratio was taken as 1:5, 1:2, 1:1, 2:1 and 5:1. The resulting membranes were characterized using FTIR and TGA. The membrane displays an excellent proton conductivity of 0.0112 S/cm at a PVA-chitosan ratio 1:1, which is comparable with that of commercial Nafion membrane. From the methanol uptake value of 42.80% it can be inferred that the methanol cross over through the membrane will be less. The Thermo Gravimetric analysis of the membrane shows that the degradation of the membrane occur at 200°C -300°C which indicates that the membrane is suitable for portable applications, Also the mechanical strength of the membrane is within the desirable limit. The possibility of using this PVA-chitosan blend membrane as proton excha...","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74000266","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}
SadasivuniKishor Kumar, KurianJoji, D. Vilasini, JosephJoshy, JosephDeepu, TomEmmanuel, ThomasDeepu
{"title":"Preface: Proceedings of the International Conference on Advanced Materials (ICAM2019)","authors":"SadasivuniKishor Kumar, KurianJoji, D. Vilasini, JosephJoshy, JosephDeepu, TomEmmanuel, ThomasDeepu","doi":"10.1063/1.5130209","DOIUrl":"https://doi.org/10.1063/1.5130209","url":null,"abstract":"","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90737042","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}
Polymer membrane composed of PVdC-AN/PMMA/EC with different anions of lithium salts were prepared using solution casting technique. A substantial change in ionic conductivity is observed in the vibrational and electrochemical analysis spectra, which may be due to the combined effect of ionic mobility, cation radii and dissociation constant. The conductance spectra and complex dielectric analysis shows that the sample containing LiAsF6 salt shows better performance. There is stronger interaction between oxygen atoms in the ether and carbonyl groups and lithium ions, than that with nitrogen atoms, which can found from infrared spectroscopic analysis.Polymer membrane composed of PVdC-AN/PMMA/EC with different anions of lithium salts were prepared using solution casting technique. A substantial change in ionic conductivity is observed in the vibrational and electrochemical analysis spectra, which may be due to the combined effect of ionic mobility, cation radii and dissociation constant. The conductance spectra and complex dielectric analysis shows that the sample containing LiAsF6 salt shows better performance. There is stronger interaction between oxygen atoms in the ether and carbonyl groups and lithium ions, than that with nitrogen atoms, which can found from infrared spectroscopic analysis.
采用溶液铸造法制备了含不同阴离子锂盐的pvc - an /PMMA/EC聚合物膜。在振动和电化学分析光谱中观察到离子电导率的显著变化，这可能是离子迁移率、阳离子半径和解离常数共同作用的结果。电导谱和复介电分析表明，含LiAsF6盐的样品具有更好的性能。红外光谱分析发现，醚中的氧原子与羰基和锂离子之间的相互作用比与氮原子之间的相互作用更强。采用溶液铸造法制备了含不同阴离子锂盐的pvc - an /PMMA/EC聚合物膜。在振动和电化学分析光谱中观察到离子电导率的显著变化，这可能是离子迁移率、阳离子半径和解离常数共同作用的结果。电导谱和复介电分析表明，含LiAsF6盐的样品具有更好的性能。红外光谱分析发现，醚中的氧原子与羰基和锂离子之间的相互作用比与氮原子之间的相互作用更强。
{"title":"Influence of different anions of lithium salts on GPE membrane","authors":"Chithra M. Mathew, S. Rajendran","doi":"10.1063/1.5130357","DOIUrl":"https://doi.org/10.1063/1.5130357","url":null,"abstract":"Polymer membrane composed of PVdC-AN/PMMA/EC with different anions of lithium salts were prepared using solution casting technique. A substantial change in ionic conductivity is observed in the vibrational and electrochemical analysis spectra, which may be due to the combined effect of ionic mobility, cation radii and dissociation constant. The conductance spectra and complex dielectric analysis shows that the sample containing LiAsF6 salt shows better performance. There is stronger interaction between oxygen atoms in the ether and carbonyl groups and lithium ions, than that with nitrogen atoms, which can found from infrared spectroscopic analysis.Polymer membrane composed of PVdC-AN/PMMA/EC with different anions of lithium salts were prepared using solution casting technique. A substantial change in ionic conductivity is observed in the vibrational and electrochemical analysis spectra, which may be due to the combined effect of ionic mobility, cation radii and dissociation constant. The conductance spectra and complex dielectric analysis shows that the sample containing LiAsF6 salt shows better performance. There is stronger interaction between oxygen atoms in the ether and carbonyl groups and lithium ions, than that with nitrogen atoms, which can found from infrared spectroscopic analysis.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91144974","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}
Joe Kizhakooden, Jovia Jose, Nees Paul, Sreedevi P. Chakyar, Anju Sebastian, Sikha K. Simon, K. Umadevi, C. Bindu, J. Andrews, V. Joseph
The present work reports the development of a multiband monopole patch antenna by utilizing Broadside Coupled Split Ring Resonator (BCSRR) units. This antenna makes use of the resonant property of metamaterial BCSRR units for multiband frequency designing. Since the magnetic resonant frequency of the BCSRR depends on the effective capacitance and inductance of its rings, the geometrical parameters of the rings like inter planar distance between them, inner and outer radii, split widths and the dielectric material between the rings play important role in designing the radiating frequency bands of the proposed antenna. The desired frequencies for potential applications like Bluetooth, Wi-Fi and Wi-Max are thus achieved by proper designing of the BCSRR units. In this work, it is demonstrated that two additional frequencies can be radiated along with the monopole radiation by coupling two BCSRR units to the monopole. The fabricated antenna exhibits high return loss at 2.45 GHz and 2.75 GHz along with the monopole radiation around 5 GHz. The number of operating frequencies can be increased by adding more BCSRR units at various positions near to the monopole patch. The proposed antenna is compact, light weight and easy to design and fabricate when compared with the recently reported multiband monopole antennas. The good agreement between the experimental and simulated results shows that the proposed antenna is a suitable candidate for potential wireless applications. The different antennas for different applications in a single device can be replaced with the single proposed antenna.The present work reports the development of a multiband monopole patch antenna by utilizing Broadside Coupled Split Ring Resonator (BCSRR) units. This antenna makes use of the resonant property of metamaterial BCSRR units for multiband frequency designing. Since the magnetic resonant frequency of the BCSRR depends on the effective capacitance and inductance of its rings, the geometrical parameters of the rings like inter planar distance between them, inner and outer radii, split widths and the dielectric material between the rings play important role in designing the radiating frequency bands of the proposed antenna. The desired frequencies for potential applications like Bluetooth, Wi-Fi and Wi-Max are thus achieved by proper designing of the BCSRR units. In this work, it is demonstrated that two additional frequencies can be radiated along with the monopole radiation by coupling two BCSRR units to the monopole. The fabricated antenna exhibits high return loss at 2.45 GHz and 2.75 GHz along with the mono...
{"title":"Broadside coupled split ring resonator based multiband monopole patch antenna for wireless communication applications","authors":"Joe Kizhakooden, Jovia Jose, Nees Paul, Sreedevi P. Chakyar, Anju Sebastian, Sikha K. Simon, K. Umadevi, C. Bindu, J. Andrews, V. Joseph","doi":"10.1063/1.5130278","DOIUrl":"https://doi.org/10.1063/1.5130278","url":null,"abstract":"The present work reports the development of a multiband monopole patch antenna by utilizing Broadside Coupled Split Ring Resonator (BCSRR) units. This antenna makes use of the resonant property of metamaterial BCSRR units for multiband frequency designing. Since the magnetic resonant frequency of the BCSRR depends on the effective capacitance and inductance of its rings, the geometrical parameters of the rings like inter planar distance between them, inner and outer radii, split widths and the dielectric material between the rings play important role in designing the radiating frequency bands of the proposed antenna. The desired frequencies for potential applications like Bluetooth, Wi-Fi and Wi-Max are thus achieved by proper designing of the BCSRR units. In this work, it is demonstrated that two additional frequencies can be radiated along with the monopole radiation by coupling two BCSRR units to the monopole. The fabricated antenna exhibits high return loss at 2.45 GHz and 2.75 GHz along with the monopole radiation around 5 GHz. The number of operating frequencies can be increased by adding more BCSRR units at various positions near to the monopole patch. The proposed antenna is compact, light weight and easy to design and fabricate when compared with the recently reported multiband monopole antennas. The good agreement between the experimental and simulated results shows that the proposed antenna is a suitable candidate for potential wireless applications. The different antennas for different applications in a single device can be replaced with the single proposed antenna.The present work reports the development of a multiband monopole patch antenna by utilizing Broadside Coupled Split Ring Resonator (BCSRR) units. This antenna makes use of the resonant property of metamaterial BCSRR units for multiband frequency designing. Since the magnetic resonant frequency of the BCSRR depends on the effective capacitance and inductance of its rings, the geometrical parameters of the rings like inter planar distance between them, inner and outer radii, split widths and the dielectric material between the rings play important role in designing the radiating frequency bands of the proposed antenna. The desired frequencies for potential applications like Bluetooth, Wi-Fi and Wi-Max are thus achieved by proper designing of the BCSRR units. In this work, it is demonstrated that two additional frequencies can be radiated along with the monopole radiation by coupling two BCSRR units to the monopole. The fabricated antenna exhibits high return loss at 2.45 GHz and 2.75 GHz along with the mono...","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91171771","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}
Mukesh Kumar Dasoundhi, Indu Rajput, D. Kumar, A. Lakhani
We report the growth, characterization and magneto-transport study of Antimony crystal at low temperature and high magnetic field. The Antimony crystal is synthesized by controlled heating and cooling of the Antimony granules. The single-phase formation of Antimony crystal is confirmed by powder X-ray diffraction (XRD) and its Rietveld refinement analysis. XRD on cleaved crystal shows the preferred orientation along (003) direction. The zero-field resistivity shows the signature of electron-phonon scattering and electron-electron scattering at higher and lower temperature regimes respectively. Antimony exhibits the semimetallic nature like Bismuth and Arsenic and shows a large magnetoresistance (MR) at low temperature and high magnetic field. Here, we explain the conditions responsible for the field induced behavior.We report the growth, characterization and magneto-transport study of Antimony crystal at low temperature and high magnetic field. The Antimony crystal is synthesized by controlled heating and cooling of the Antimony granules. The single-phase formation of Antimony crystal is confirmed by powder X-ray diffraction (XRD) and its Rietveld refinement analysis. XRD on cleaved crystal shows the preferred orientation along (003) direction. The zero-field resistivity shows the signature of electron-phonon scattering and electron-electron scattering at higher and lower temperature regimes respectively. Antimony exhibits the semimetallic nature like Bismuth and Arsenic and shows a large magnetoresistance (MR) at low temperature and high magnetic field. Here, we explain the conditions responsible for the field induced behavior.
{"title":"Field induced transport studies of antimony crystal","authors":"Mukesh Kumar Dasoundhi, Indu Rajput, D. Kumar, A. Lakhani","doi":"10.1063/1.5130216","DOIUrl":"https://doi.org/10.1063/1.5130216","url":null,"abstract":"We report the growth, characterization and magneto-transport study of Antimony crystal at low temperature and high magnetic field. The Antimony crystal is synthesized by controlled heating and cooling of the Antimony granules. The single-phase formation of Antimony crystal is confirmed by powder X-ray diffraction (XRD) and its Rietveld refinement analysis. XRD on cleaved crystal shows the preferred orientation along (003) direction. The zero-field resistivity shows the signature of electron-phonon scattering and electron-electron scattering at higher and lower temperature regimes respectively. Antimony exhibits the semimetallic nature like Bismuth and Arsenic and shows a large magnetoresistance (MR) at low temperature and high magnetic field. Here, we explain the conditions responsible for the field induced behavior.We report the growth, characterization and magneto-transport study of Antimony crystal at low temperature and high magnetic field. The Antimony crystal is synthesized by controlled heating and cooling of the Antimony granules. The single-phase formation of Antimony crystal is confirmed by powder X-ray diffraction (XRD) and its Rietveld refinement analysis. XRD on cleaved crystal shows the preferred orientation along (003) direction. The zero-field resistivity shows the signature of electron-phonon scattering and electron-electron scattering at higher and lower temperature regimes respectively. Antimony exhibits the semimetallic nature like Bismuth and Arsenic and shows a large magnetoresistance (MR) at low temperature and high magnetic field. Here, we explain the conditions responsible for the field induced behavior.","PeriodicalId":20725,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS: ICAM 2019","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91282837","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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