ADVANCES IN BASIC SCIENCE (ICABS 2019)最新文献

{"title":"Effect of light absorption and critical beam power on self-focusing of Gaussian laser beam in collision less magnetized plasma","authors":"T. U. Urunkar, K. M. Gavade, B. D. Vhanmore, A. T. Valkunde, S. Patil, M. Takale","doi":"10.1063/1.5122463","DOIUrl":"https://doi.org/10.1063/1.5122463","url":null,"abstract":"In the present paper, authors have studied the effect of light absorption and critical beam power on self-focusing of Gaussian laser beam propagating through collisionless magnetized plasma. The field distribution in the medium is expressed in terms of beam-width parameter and absorption coefficient. Usual parabolic equation approach under WKB and paraxial approximations is employed to obtain the differential equation for beam width parameter. It is found that critical critical beam power and absorption coefficient play vital role in propagation of Gaussian laser beam in collisionless magnetized plasma. The behavior of beam-width parameter with the normalized distance of propagation is studied at various values of critical beam power with different absorption levels in magnetized plasma. The results are presented in the form of graphs and discussed.In the present paper, authors have studied the effect of light absorption and critical beam power on self-focusing of Gaussian laser beam propagating through collisionless magnetized plasma. The field distribution in the medium is expressed in terms of beam-width parameter and absorption coefficient. Usual parabolic equation approach under WKB and paraxial approximations is employed to obtain the differential equation for beam width parameter. It is found that critical critical beam power and absorption coefficient play vital role in propagation of Gaussian laser beam in collisionless magnetized plasma. The behavior of beam-width parameter with the normalized distance of propagation is studied at various values of critical beam power with different absorption levels in magnetized plasma. The results are presented in the form of graphs and discussed.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"92 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83351835","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}

{"title":"Effect of inter layers in joining dissimilar metals","authors":"R. Pravin, S. Raj","doi":"10.1063/1.5122396","DOIUrl":"https://doi.org/10.1063/1.5122396","url":null,"abstract":"In the recent decade, dissimilar metal joints are much sought in many critical industrial application. But joining of dissimilar metals pose many challenges because of the difference in chemical, thermal and mechanical properties of metals. Joining of dissimilar metals using interlayers by friction stud welding is an ideal solution. The strength and toughness of the weld can be further improved by introducing a layer of material in between the dissimilar metals. Interlayers are small thin sheet of material of metal used in friction welding of metals. This interlayer has typical effect on the welds and the found to produce desirable effects on the welded joints. This paper focuses on the various effects of interlayers on welding of dissimilar metals.In the recent decade, dissimilar metal joints are much sought in many critical industrial application. But joining of dissimilar metals pose many challenges because of the difference in chemical, thermal and mechanical properties of metals. Joining of dissimilar metals using interlayers by friction stud welding is an ideal solution. The strength and toughness of the weld can be further improved by introducing a layer of material in between the dissimilar metals. Interlayers are small thin sheet of material of metal used in friction welding of metals. This interlayer has typical effect on the welds and the found to produce desirable effects on the welded joints. This paper focuses on the various effects of interlayers on welding of dissimilar metals.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81755702","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}

{"title":"MOF derived Co/C and Co3O4/C polyhedron for hydrogen evolution reaction","authors":"U. Azad, Sandeep Kumar, A. Singh, R. Prakash, A. Singh","doi":"10.1063/1.5122629","DOIUrl":"https://doi.org/10.1063/1.5122629","url":null,"abstract":"We have synthesized MOF derived cobalt-polyhedron by facile method and the same was characterized by various spectroscopic and analytical techniques. Prepared polyhedronhas rhombic dodecahedron shape and shows efficient electrocatalytic activity for hydrogen evolution in 0.5M H2SO4 solution. Acid washed (AW) samples shows better HER activity as compared to their only heat-treated counterpart. 900AW show maximum HER activity (Tafel slope 86.9 mV dec-1). It was found that temperature as well as porosity plays very important role in HER.We have synthesized MOF derived cobalt-polyhedron by facile method and the same was characterized by various spectroscopic and analytical techniques. Prepared polyhedronhas rhombic dodecahedron shape and shows efficient electrocatalytic activity for hydrogen evolution in 0.5M H2SO4 solution. Acid washed (AW) samples shows better HER activity as compared to their only heat-treated counterpart. 900AW show maximum HER activity (Tafel slope 86.9 mV dec-1). It was found that temperature as well as porosity plays very important role in HER.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83103027","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}

{"title":"Effect of lanthanum doping on structural and optical properties of ZnO along with photocatalytic activity in degradating toxic pesticide (monocrotophos)","authors":"Geetika, Vijay Luxmi, Ashavani Kumar","doi":"10.1063/1.5122346","DOIUrl":"https://doi.org/10.1063/1.5122346","url":null,"abstract":"Organic pollutants such as pesticides, dyes used in agriculture and industries pollute the water on large scale. In order to solve the problem of water pollution caused by the agricultural pesticides its degradation process has been studied. For this purpose, pure-ZnO and La doped ZnO nanoparticles were synthesized via co-precipitation method to observe photocatalytic response. Synthesized nanoparticles were unambiguously examined using x-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques for morphological and structural characterization. UV-visible spectroscopy and photoluminescence (PL) techniques for optical characterization. The average crystallite sizes of ZnO and La-doped ZnO NPs were ∼55 nm and 35 nm, respectively. For photocatalytic activity, monocrotophos which is an insecticide is aimed to degrade in normal water under u.v light illumination. Enhancement in photocatalytic degradation efficiency is observed in La-doped ZnO due to enhancement in the surface area.Organic pollutants such as pesticides, dyes used in agriculture and industries pollute the water on large scale. In order to solve the problem of water pollution caused by the agricultural pesticides its degradation process has been studied. For this purpose, pure-ZnO and La doped ZnO nanoparticles were synthesized via co-precipitation method to observe photocatalytic response. Synthesized nanoparticles were unambiguously examined using x-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques for morphological and structural characterization. UV-visible spectroscopy and photoluminescence (PL) techniques for optical characterization. The average crystallite sizes of ZnO and La-doped ZnO NPs were ∼55 nm and 35 nm, respectively. For photocatalytic activity, monocrotophos which is an insecticide is aimed to degrade in normal water under u.v light illumination. Enhancement in photocatalytic degradation efficiency is observed in La-doped ZnO due to enhancement in the surface area.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"273 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89769144","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}

{"title":"Fabrication and characterization of MWCNTs and Pt/MWCNTs counter electrodes for dye sensitized solar cells","authors":"Bulkesh Siwach, D. Mohan, Monika Barala","doi":"10.1063/1.5122369","DOIUrl":"https://doi.org/10.1063/1.5122369","url":null,"abstract":"DSSCs based on three different counter electrodes (CEs) viz. platinum (Pt), multiwalled carbon nanotubes (MWCNTs), and mixed Pt/MWCNTs were prepared and their photovoltaic performance is compared. The pastes of MWCNTs and Pt/MWCNTs CEs were coated on indium tin oxide (ITO) glass substrates with doctor blade method whereas the Pt CE is prepared by drop casting method. The structural and catalytic properties of the CEs under reference were investigated by X-ray diffraction (XRD) and Cyclic voltammetry (CV), respectively. Three DSSCs with these three different CEs having ZnO as a photoanode material were assembled in a sandwiched arrangement and the photovoltaic performance of these cells were measured with the help of solar simulator under standard conditions (1.5 Sun, 100 mW cm−2). The DSSC based on mixed Pt/MWCNTs CE exhibited the highest performance (η =3.78%) as compared to the cells based on Pt (η =2.69 %) and MWCNTs (η =2.26 %) CEs which are higher than the DSSCs made with conventional Pt CE.DSSCs based on three different counter electrodes (CEs) viz. platinum (Pt), multiwalled carbon nanotubes (MWCNTs), and mixed Pt/MWCNTs were prepared and their photovoltaic performance is compared. The pastes of MWCNTs and Pt/MWCNTs CEs were coated on indium tin oxide (ITO) glass substrates with doctor blade method whereas the Pt CE is prepared by drop casting method. The structural and catalytic properties of the CEs under reference were investigated by X-ray diffraction (XRD) and Cyclic voltammetry (CV), respectively. Three DSSCs with these three different CEs having ZnO as a photoanode material were assembled in a sandwiched arrangement and the photovoltaic performance of these cells were measured with the help of solar simulator under standard conditions (1.5 Sun, 100 mW cm−2). The DSSC based on mixed Pt/MWCNTs CE exhibited the highest performance (η =3.78%) as compared to the cells based on Pt (η =2.69 %) and MWCNTs (η =2.26 %) CEs which are higher than the DSSCs made with conventional Pt CE.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78287033","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}

{"title":"Polyaniline integrated with reduced graphene oxide resulting in binder free electrode material for supercapacitor application","authors":"Mandira Majumder, R. Choudhary, A. K. Thakur","doi":"10.1063/1.5122550","DOIUrl":"https://doi.org/10.1063/1.5122550","url":null,"abstract":"Integration of polyaniline (PANI) with reduced graphene oxide (rGO) resulting in PANI/rGO seems to be an effective way to eliminate the concern of cyclic stability attributed to the fragile back bone of polyaniline (PANI). Also, presence of aniline fibrils in the intervening layers of reduced graphene oxide enhances the conduction of the electrolytic ions in the resulting composite. The as-synthesized PANI/rGO composite shows an enhanced specific capacitance of 268 F g−1. All these results project PANI/rGO as an attractive electrode material for supercapacitor application.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78022538","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}

{"title":"Influence of Eu3+ ions on nonlinear optical properties of alklai borate glasses at near-infrared wavelengths","authors":"G. Jagannath, B. Eraiah, K. N. Krishnakanth, Venugopal Rao Soma","doi":"10.1063/1.5122416","DOIUrl":"https://doi.org/10.1063/1.5122416","url":null,"abstract":"Optical glasses with enhanced third order nonlinear attributes are promsing materials for photonic applications, particularly for optical limiting and switching devices. With the aim of obtaining enhanced nonlinear optical (NLO) properties, Eu3+ doped borate glasses have been prepared through method of melt quench. NLO properties of fabricated glasses were investigated using Z‒scan techinique as a function of Eu2O3 concentration at near-infrared (NIR) wavelength (800 nm) by utilising 150 femtosecond (fs) laser pulses generated at a repetetion rate of 80 MHz from sapphire laser. The investigated glasses demonstrated a reverse saturable absorption (RSA) type of behaviour in open aperture (OA) configuration and positive nonlinear refraction in closed aperture (CA) configuration. The retrieved NLO coefficients evidently demonstrate the studied glasses are competing materials for photonic applications under fs regime.Optical glasses with enhanced third order nonlinear attributes are promsing materials for photonic applications, particularly for optical limiting and switching devices. With the aim of obtaining enhanced nonlinear optical (NLO) properties, Eu3+ doped borate glasses have been prepared through method of melt quench. NLO properties of fabricated glasses were investigated using Z‒scan techinique as a function of Eu2O3 concentration at near-infrared (NIR) wavelength (800 nm) by utilising 150 femtosecond (fs) laser pulses generated at a repetetion rate of 80 MHz from sapphire laser. The investigated glasses demonstrated a reverse saturable absorption (RSA) type of behaviour in open aperture (OA) configuration and positive nonlinear refraction in closed aperture (CA) configuration. The retrieved NLO coefficients evidently demonstrate the studied glasses are competing materials for photonic applications under fs regime.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81793471","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}

{"title":"Mercerization effect on bio-waste eggshell reinforced polymer composite for energy saving application","authors":"C. Dash, A. Das, S. Behera, D. Bisoyi","doi":"10.1063/1.5122394","DOIUrl":"https://doi.org/10.1063/1.5122394","url":null,"abstract":"Polymer composite from biowaste material have gained enough interest by its unique light weight, high strength, high corrosion resistance, affordability, pollution free, renewability and ecofriendly natures. These important factors are relevant to form an energy efficient domain which will boost the fuel economy in many engineering and industrial sectors. In present study, composite material has developed from waste chicken eggshells (CES). Existing hydrophilic semipermeable membrane in eggshell create trouble during the development of composite with hydrophobic matrix. So (CES)/matrix interface was modified by treating CES with sodium hydroxide chemical which better known as “Mercerization”. Structural, morphological, vibrational and mechanical properties were investigated both for untreated and treated CES particle as well as composites. Structural result showed an increase in crystallite size of ESP which indicated the additional crystal growth in crystalline region. A smooth surface with porous membrane were spotted from morphological study. Combinely, porous membrane and crystallite size increment facilitated the interfacial bonding between ESP/matrix which may cause the improvement in mechanical properties of composites.Polymer composite from biowaste material have gained enough interest by its unique light weight, high strength, high corrosion resistance, affordability, pollution free, renewability and ecofriendly natures. These important factors are relevant to form an energy efficient domain which will boost the fuel economy in many engineering and industrial sectors. In present study, composite material has developed from waste chicken eggshells (CES). Existing hydrophilic semipermeable membrane in eggshell create trouble during the development of composite with hydrophobic matrix. So (CES)/matrix interface was modified by treating CES with sodium hydroxide chemical which better known as “Mercerization”. Structural, morphological, vibrational and mechanical properties were investigated both for untreated and treated CES particle as well as composites. Structural result showed an increase in crystallite size of ESP which indicated the additional crystal growth in crystalline region. A smooth surface with porous membra...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89482046","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}

{"title":"Photoluminescence study in Gd2O3: Er3+/Yb3+ nanocrystal as a promising sensing probe","authors":"S. K. Maurya, K. Krishna, M. Upadhaya, K. Kumar","doi":"10.1063/1.5122625","DOIUrl":"https://doi.org/10.1063/1.5122625","url":null,"abstract":"The Er3+/Yb3+ codoped Gd2O3nanocrystal (NC) is synthesized by combustion route using rare earths nitrates as precursors with urea as reducing agent. The prepared samples further calcined at 800 °C for better emission intensities. The FESEM image of calcined NChas used to analyse for the shape and size of particles. The agglomerated particles are investigated. The comparatives study of down conversion and up conversion behaviour of calcined NC are monitored, consequently, the red band dominated over the green band assigned at 656, 548 and 523 nm corresponding to 4F9/2 → 4I15/2, 4S3/2→4I15/2 and 2H11/2→4I15/2 transition, respectively. The Fluorescence intensity ratio is investigated with laser pump power. The color CIE coordinates of the calcinedsample at different wavelength (380 and 976 nm) are calculated which shows almostinvariant and applicable as display device.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89579466","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}

{"title":"Effect of iron ion implantation dose on optical and structural properties of CdS nanowires","authors":"J. Kaur, Ravinder Singh","doi":"10.1063/1.5122358","DOIUrl":"https://doi.org/10.1063/1.5122358","url":null,"abstract":"CdS being a member of II-VI group, having a wide optical band gap of 2.42 eV makes it suitable for use in the area of photovoltaic and laser devices. It is normally an n-type semiconductor and by d...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"128 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91461903","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}