Pub Date : 2019-02-28DOI: 10.26438/ijsrpas/v7i1.8387
A shwini, B. Kerur
In the present work ayurvedic drug Tamra bhasma (TB) of different brands were procured, the pellets of different thickness of TB was prepared, by employing the non destructive technique, X-ray mass attenuation coefficients of Tamra bhasma have been measured using the variable energy X-ray source Am 241 as a source of characteristic X-rays of low energy (17.781, 22.581, 32.890 and 44.216 keV). These X-rays were used for interaction process with the sample (Tamra bhasma) and incident and transmitted photons are collected by a NaI(Tl) scintillation X-ray detector. The mass attenuation coefficients values are determined by following all procedure such as counting times, background intensities, error involved in counting statistics and good geometry is maintained for the counting of photon beams. The experimentally obtained values are compared with the theoretically calculated values, using the WinXcom data program. From obtained results, it reveals that, the variation in percentage deviation (PD) of experimental and theoretical calculated values of mass attenuation coefficient corresponds to the amount of bioenhancers, incorporated in Tamra bhasma during preparation process. Here variation in percentage deviation reflects drugs as the admixture of elements other than the pharmaceutical active ingredients (here in Tamra bhasma Cu is the Active Pharmaceutical Ingredient) which focuses on the purity and also change in quality of medicines. Keywords—Ayurvedic drug, X-ray Mass attenuation coefficient, Tamra bhasma, NaI(Tl) scintillation/X-ray Detector
{"title":"Analysis of different brands Ayurvedic Drug (Tamra Bhasma) by Non Destructive Technique using NaI(Tl) Scintillation Detector","authors":"A shwini, B. Kerur","doi":"10.26438/ijsrpas/v7i1.8387","DOIUrl":"https://doi.org/10.26438/ijsrpas/v7i1.8387","url":null,"abstract":"In the present work ayurvedic drug Tamra bhasma (TB) of different brands were procured, the pellets of different thickness of TB was prepared, by employing the non destructive technique, X-ray mass attenuation coefficients of Tamra bhasma have been measured using the variable energy X-ray source Am 241 as a source of characteristic X-rays of low energy (17.781, 22.581, 32.890 and 44.216 keV). These X-rays were used for interaction process with the sample (Tamra bhasma) and incident and transmitted photons are collected by a NaI(Tl) scintillation X-ray detector. The mass attenuation coefficients values are determined by following all procedure such as counting times, background intensities, error involved in counting statistics and good geometry is maintained for the counting of photon beams. The experimentally obtained values are compared with the theoretically calculated values, using the WinXcom data program. From obtained results, it reveals that, the variation in percentage deviation (PD) of experimental and theoretical calculated values of mass attenuation coefficient corresponds to the amount of bioenhancers, incorporated in Tamra bhasma during preparation process. Here variation in percentage deviation reflects drugs as the admixture of elements other than the pharmaceutical active ingredients (here in Tamra bhasma Cu is the Active Pharmaceutical Ingredient) which focuses on the purity and also change in quality of medicines. Keywords—Ayurvedic drug, X-ray Mass attenuation coefficient, Tamra bhasma, NaI(Tl) scintillation/X-ray Detector","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81839500","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 : 2019-02-28DOI: 10.26438/ijsrpas/v7i1.19
M. Pushpanjali, H. Somashekarappa
In this work, a unique nanocomposite film based on poly (vinyl alcohol)/silver (PVA/Ag) has been synthesized using solution casting technique and the samples were exposed to gamma radiation for different doses 0, 25, 50 and 75 kGy. Ultraviolet-Visible spectroscopy, the characteristic Surface Plasmon Resonance (SPR) band placed at around 427 nm. FTIR analysis shows the formation of chemical bonding/conjugation between the Ag nanoparticles and PVA chains. X-ray diffraction analysis shows that Ag metal is present in face-centered cubic (fcc) crystal structure. The morphology of particles was studied using Field Emission Scanning Electron Microscopy (FESEM) it shows the nanoparticles are in spherical shape. The presence of Ag was confirmed using Energy Dispersive X-ray Spectroscopy (EDX) elemental analysis. Transmission Electron Microscopy (TEM) shows the particles were nano size and monodispersed. The antibacterial activities of the PVA/Ag nanocomposites were obtained using the zone inhibition method. The samples were tested against Gram-positive bacteria: Bacillus Subtilis, Staphylococcus aureus, and Gram-negative bacteria: Escherichia coli, Klebsiella pneumoniae. This study reveals that the irradiated PVA/Ag nanocomposites film shows good antibacterial activity against the Gram-positive and Gramnegative bacteria.
{"title":"Synthesis and Characterization of Polyvinyl alcoholSilver Nanocomposite films and Effect of Gamma Radiation","authors":"M. Pushpanjali, H. Somashekarappa","doi":"10.26438/ijsrpas/v7i1.19","DOIUrl":"https://doi.org/10.26438/ijsrpas/v7i1.19","url":null,"abstract":"In this work, a unique nanocomposite film based on poly (vinyl alcohol)/silver (PVA/Ag) has been synthesized using solution casting technique and the samples were exposed to gamma radiation for different doses 0, 25, 50 and 75 kGy. Ultraviolet-Visible spectroscopy, the characteristic Surface Plasmon Resonance (SPR) band placed at around 427 nm. FTIR analysis shows the formation of chemical bonding/conjugation between the Ag nanoparticles and PVA chains. X-ray diffraction analysis shows that Ag metal is present in face-centered cubic (fcc) crystal structure. The morphology of particles was studied using Field Emission Scanning Electron Microscopy (FESEM) it shows the nanoparticles are in spherical shape. The presence of Ag was confirmed using Energy Dispersive X-ray Spectroscopy (EDX) elemental analysis. Transmission Electron Microscopy (TEM) shows the particles were nano size and monodispersed. The antibacterial activities of the PVA/Ag nanocomposites were obtained using the zone inhibition method. The samples were tested against Gram-positive bacteria: Bacillus Subtilis, Staphylococcus aureus, and Gram-negative bacteria: Escherichia coli, Klebsiella pneumoniae. This study reveals that the irradiated PVA/Ag nanocomposites film shows good antibacterial activity against the Gram-positive and Gramnegative bacteria.","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76188115","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 : 2019-02-28DOI: 10.26438/ijsrpas/v7i1.8082
Anup Kr Kalita, S. Karmakar
Iron (Fe) doped Zinc Oxide (ZnO) nanoparticle is a very important topic of study in the field of nanoscience and nanotechnology. We have prepared Iron doped ZnO nanoparticles by Wet chemical method. We report the optical properties of Iron (Fe) doped ZnO nanoparticles at different molarities (0.025M, 0.05M and 0.1M). The band gaps of all nanoparticles prepared at different molarities are calculated with the intercept on Y-axis of Tauc plot from UV absorption spectra using UVVis Absorption spectroscopy. It has been observed that band gap decreases as the molarity increases. At 0.025M, 0.05M and 0.1M band gap are found to be 4.9eV, 4.89eV and 2.7eV respectively. This reduction in band gap suggest that the band gap of prepared nanoparticles are shifted towards lower energy. This shifting in band gap the blue region gives the idea of blue shift quite well. This blue shift is dependent on the particle size of the nanoparticles.
{"title":"Study of blue shift in Iron (Fe) doped ZnO Nanoparticles at different Molarities by Wet Chemical Method","authors":"Anup Kr Kalita, S. Karmakar","doi":"10.26438/ijsrpas/v7i1.8082","DOIUrl":"https://doi.org/10.26438/ijsrpas/v7i1.8082","url":null,"abstract":"Iron (Fe) doped Zinc Oxide (ZnO) nanoparticle is a very important topic of study in the field of nanoscience and nanotechnology. We have prepared Iron doped ZnO nanoparticles by Wet chemical method. We report the optical properties of Iron (Fe) doped ZnO nanoparticles at different molarities (0.025M, 0.05M and 0.1M). The band gaps of all nanoparticles prepared at different molarities are calculated with the intercept on Y-axis of Tauc plot from UV absorption spectra using UVVis Absorption spectroscopy. It has been observed that band gap decreases as the molarity increases. At 0.025M, 0.05M and 0.1M band gap are found to be 4.9eV, 4.89eV and 2.7eV respectively. This reduction in band gap suggest that the band gap of prepared nanoparticles are shifted towards lower energy. This shifting in band gap the blue region gives the idea of blue shift quite well. This blue shift is dependent on the particle size of the nanoparticles.","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"180 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76207759","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 : 2019-02-28DOI: 10.26438/ijsrpas/v7i1.3541
Davinder Singh, A. Singhal, N. Saini
Sol-gel dip coating was used to obtain undoped and Fe doped TiO2 thin films deposited on ITO (indium tin oxide) coated glass substrate. These films were sintered at 500 ° C for 1 hour and were thoroughly characterized with respect to their crystal structure, phase transformation and elemental composition. The structural and dielectric properties of the films were characterized by XPS, TEM, and impedance analyzer. The elemental composition and the oxidation state of the elements in the films were investigated by XPS, titanium peaks were observed at 458.67eV, 457.45eV and 457.28eV that belongs to Ti +4 . The presence of Fe +3 in the samples is indicated by peaks found at 717.9eV and 709.41eV (2p1/2 and 2p3/2) state and at 743eV TEM studies confirm mostly the crystallite anatase and rutile phase for the Fe doped TiO2 films. Particle size decreased from 35 nm to 17 nm by 10-mol % iron doping. The density of interfacial states decreases with increase in iron concentration. XPS studies reveal that titanium exists in Ti +4 state in all the samples. Dielectric conductivity increased with increase in Fe concentration. Different types of polarization processes exist in different regions of frequency due to which the value of dielectric constant changes in pure as well as Fe doped TiO2 thin films. KeywordsSol-gel, anatase, rutile.
{"title":"Pure and Fe doped TiO2 thin films for MOSFET Technology","authors":"Davinder Singh, A. Singhal, N. Saini","doi":"10.26438/ijsrpas/v7i1.3541","DOIUrl":"https://doi.org/10.26438/ijsrpas/v7i1.3541","url":null,"abstract":"Sol-gel dip coating was used to obtain undoped and Fe doped TiO2 thin films deposited on ITO (indium tin oxide) coated glass substrate. These films were sintered at 500 ° C for 1 hour and were thoroughly characterized with respect to their crystal structure, phase transformation and elemental composition. The structural and dielectric properties of the films were characterized by XPS, TEM, and impedance analyzer. The elemental composition and the oxidation state of the elements in the films were investigated by XPS, titanium peaks were observed at 458.67eV, 457.45eV and 457.28eV that belongs to Ti +4 . The presence of Fe +3 in the samples is indicated by peaks found at 717.9eV and 709.41eV (2p1/2 and 2p3/2) state and at 743eV TEM studies confirm mostly the crystallite anatase and rutile phase for the Fe doped TiO2 films. Particle size decreased from 35 nm to 17 nm by 10-mol % iron doping. The density of interfacial states decreases with increase in iron concentration. XPS studies reveal that titanium exists in Ti +4 state in all the samples. Dielectric conductivity increased with increase in Fe concentration. Different types of polarization processes exist in different regions of frequency due to which the value of dielectric constant changes in pure as well as Fe doped TiO2 thin films. KeywordsSol-gel, anatase, rutile.","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88792977","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 : 2019-02-28DOI: 10.26438/ijsrpas/v7i1.7679
R. Kumar
{"title":"Evidence for Chiral Doublet Structure in 122Cs","authors":"R. Kumar","doi":"10.26438/ijsrpas/v7i1.7679","DOIUrl":"https://doi.org/10.26438/ijsrpas/v7i1.7679","url":null,"abstract":"","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90851437","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 : 2019-02-28DOI: 10.26438/ijsrpas/v7i1.8891
J. Saikia, G. Baruah
- Einstein’s derivation of Planck’s black body energy distribution law has been examined with the inclusion of the process of spontaneous absorption. It has been shown that the inclusion of the term of spontaneous absorption does not affect the distribution law but leads to an equation which was derived by Max Plank in 1911.The idea of relating spontaneous absorption to zero point energy is discussed in its historical prelude. We have observed that in the steady state temperature T, inclusion of the term of spontaneous absorption with some arbitrarily chosen value of transition probability results in the same distribution law for the black body as derived by Einstein in 1917, plus an additional term which points to the universal, uniform, all-pervasive phenomenon of zero point energy. The physics of zero point energy is well known but the zero point energy that originates from the term of spontaneous absorption is completely new. It is reasonable to believe that spontaneous is non-zero for a ground state which is not perfectly vacuum.
{"title":"Spontaneous Absorption, Einsteins Rate Equation Approximation and Zero Point Energy","authors":"J. Saikia, G. Baruah","doi":"10.26438/ijsrpas/v7i1.8891","DOIUrl":"https://doi.org/10.26438/ijsrpas/v7i1.8891","url":null,"abstract":"- Einstein’s derivation of Planck’s black body energy distribution law has been examined with the inclusion of the process of spontaneous absorption. It has been shown that the inclusion of the term of spontaneous absorption does not affect the distribution law but leads to an equation which was derived by Max Plank in 1911.The idea of relating spontaneous absorption to zero point energy is discussed in its historical prelude. We have observed that in the steady state temperature T, inclusion of the term of spontaneous absorption with some arbitrarily chosen value of transition probability results in the same distribution law for the black body as derived by Einstein in 1917, plus an additional term which points to the universal, uniform, all-pervasive phenomenon of zero point energy. The physics of zero point energy is well known but the zero point energy that originates from the term of spontaneous absorption is completely new. It is reasonable to believe that spontaneous is non-zero for a ground state which is not perfectly vacuum.","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84426530","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 : 2019-02-28DOI: 10.26438/ijsrpas/v7i1.5659
G. Dhingra
Received:21/Jan/2019, Accepted: 14/Feb/2019, Online 28/Feb/2019 Abstract— Microscopic equations of an interacting and correlated system of particles has been solved to compute two of the transport properties, namely diffusion coefficient and longitudinal viscosity, of liquid potassium near its melting point, at 343K, for a wave vector range: 0.9 nm −1 to 17.0 nm −1 . The present theoretical approach uses microscopic theory as a tool to compute the detailed dynamical structure factor, current-current correlation function and hence, the diffusion coefficient as well as the coefficient of longitudinal viscosity. Microscopic theory uses interparticle-interaction present among particles of a liquid to yield density-density response function and hence, its complete dynamics. The diffusion coefficient is evolved as a realistic parameter which has been fit to explain the experimental dynamical structure factors. The coefficient of longitudinal viscosity on the other hand is directly related to static structure factor and diffusion coefficient in the regime where wavevector and frequency approaches zero. It also depends upon velocity of sound which, in the present communication, has been calculated from peak positions of current-current correlation functions in the limit wavevector approaches zero. Computed results for both of the transport coefficients, self diffusion coefficient and longitudinal viscosity are found to agree well with the corresponding experimentally reported values.
{"title":"Microscopic Transport Phenomena in a Liquid Alkali Metal K39","authors":"G. Dhingra","doi":"10.26438/ijsrpas/v7i1.5659","DOIUrl":"https://doi.org/10.26438/ijsrpas/v7i1.5659","url":null,"abstract":"Received:21/Jan/2019, Accepted: 14/Feb/2019, Online 28/Feb/2019 Abstract— Microscopic equations of an interacting and correlated system of particles has been solved to compute two of the transport properties, namely diffusion coefficient and longitudinal viscosity, of liquid potassium near its melting point, at 343K, for a wave vector range: 0.9 nm −1 to 17.0 nm −1 . The present theoretical approach uses microscopic theory as a tool to compute the detailed dynamical structure factor, current-current correlation function and hence, the diffusion coefficient as well as the coefficient of longitudinal viscosity. Microscopic theory uses interparticle-interaction present among particles of a liquid to yield density-density response function and hence, its complete dynamics. The diffusion coefficient is evolved as a realistic parameter which has been fit to explain the experimental dynamical structure factors. The coefficient of longitudinal viscosity on the other hand is directly related to static structure factor and diffusion coefficient in the regime where wavevector and frequency approaches zero. It also depends upon velocity of sound which, in the present communication, has been calculated from peak positions of current-current correlation functions in the limit wavevector approaches zero. Computed results for both of the transport coefficients, self diffusion coefficient and longitudinal viscosity are found to agree well with the corresponding experimentally reported values.","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75062841","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 : 2018-12-31DOI: 10.26438/ijsrpas/v6i6.177183
Anil Kumar, Nagendra Kumar, Vinod Kumar
Received: 05/Dec/2018, Accepted: 13/Dec/2018, Online: 31/Dec/2018 Abstract— Fluid dynamical instabilities in magnetized partially ionized dense dusty plasma are studied by taking into account relative flow between dust and neutral gas. Following Hurwitz criterion, the onset criteria for instabilities are derived for different densities of the neutral gas and dust components across the interface. It is found that in case of no significant magnetic field stabilization occurs not only due to dust neutral gas collisions but due to relative flow also. Our result might be useful in many situations of astrophysical magnetized dusty plasma namely comets and circumsteller dusty disk e.g. T-Tauri stars.
{"title":"Fluid Dynamical Instabilities in Magnetized Partially Ionized Dense Dusty Plasma","authors":"Anil Kumar, Nagendra Kumar, Vinod Kumar","doi":"10.26438/ijsrpas/v6i6.177183","DOIUrl":"https://doi.org/10.26438/ijsrpas/v6i6.177183","url":null,"abstract":"Received: 05/Dec/2018, Accepted: 13/Dec/2018, Online: 31/Dec/2018 Abstract— Fluid dynamical instabilities in magnetized partially ionized dense dusty plasma are studied by taking into account relative flow between dust and neutral gas. Following Hurwitz criterion, the onset criteria for instabilities are derived for different densities of the neutral gas and dust components across the interface. It is found that in case of no significant magnetic field stabilization occurs not only due to dust neutral gas collisions but due to relative flow also. Our result might be useful in many situations of astrophysical magnetized dusty plasma namely comets and circumsteller dusty disk e.g. T-Tauri stars.","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76687451","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 : 2018-12-31DOI: 10.26438/ijsrpas/v6i6.6979
V. Verma, N. K. Pandey
--MnO2 doped nanostructured zinc oxide was synthesized by solid state reaction route. The prepared material was characterized by X-ray diffraction, scanning electron microscope and UV-Vis absorption spectroscopy. The doping of MnO2 in ZnÒ enhanced the crystallization and decreased the crystallite size. Surface morphology of the sensing material showed that the hexagonal shaped particles were uniformly distributed in zinc oxide that left large number of pores. These pores acted as humidity adsorption sites. With increase in the concentration of MnO2, the pores also increased. The optical band gap of pure ZnO was 4.05 eV. The value of band gap decreased with increase in the MnO2 doping concentration. The average sensitivity of undoped zinc oxide was 3400 KΩ/%RH. The sensitivity of the sensing element increased with increase in the doping concentration. Sensitivity of MnO2 doped ZnO composite is more than four times the sensitivity of pure zinc oxide at annealing temperature 600 o C. Keywords---Humidity Sensor; Zinc oxide; X-ray diffraction; Scanning electron microscopy; UV-Vis Spectroscopy.
{"title":"MnO2-ZnO Hexagonal Nanomaterials Characterization and High Performance Humidity Sensing Application","authors":"V. Verma, N. K. Pandey","doi":"10.26438/ijsrpas/v6i6.6979","DOIUrl":"https://doi.org/10.26438/ijsrpas/v6i6.6979","url":null,"abstract":"--MnO2 doped nanostructured zinc oxide was synthesized by solid state reaction route. The prepared material was characterized by X-ray diffraction, scanning electron microscope and UV-Vis absorption spectroscopy. The doping of MnO2 in ZnÒ enhanced the crystallization and decreased the crystallite size. Surface morphology of the sensing material showed that the hexagonal shaped particles were uniformly distributed in zinc oxide that left large number of pores. These pores acted as humidity adsorption sites. With increase in the concentration of MnO2, the pores also increased. The optical band gap of pure ZnO was 4.05 eV. The value of band gap decreased with increase in the MnO2 doping concentration. The average sensitivity of undoped zinc oxide was 3400 KΩ/%RH. The sensitivity of the sensing element increased with increase in the doping concentration. Sensitivity of MnO2 doped ZnO composite is more than four times the sensitivity of pure zinc oxide at annealing temperature 600 o C. Keywords---Humidity Sensor; Zinc oxide; X-ray diffraction; Scanning electron microscopy; UV-Vis Spectroscopy.","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73325775","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 : 2018-12-31DOI: 10.26438/ijsrpas/v6i6.184188
D. D. Pawar, S. P. Shahare
{"title":"Tilted Bianchi type I model in Saez-Ballester theory of gravitation","authors":"D. D. Pawar, S. P. Shahare","doi":"10.26438/ijsrpas/v6i6.184188","DOIUrl":"https://doi.org/10.26438/ijsrpas/v6i6.184188","url":null,"abstract":"","PeriodicalId":14348,"journal":{"name":"International Journal of Scientific Research in Physics and Applied Sciences","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84149793","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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