{"title":"Committees: National Conference on Physics and Chemistry of Materials (NCPCM 2020)","authors":"","doi":"10.1063/12.0005922","DOIUrl":"https://doi.org/10.1063/12.0005922","url":null,"abstract":"","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75937315","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}
Some thermodynamic properties of the high-Tc cuprates have been studied using t-J-U model at different doping () by an exact method on a tilted square cluster. Low temperature specific heat curves show single-peak structure where the peak-height decreases with increasing . The system becomes more disordered with decreasing hole occupancy. The extrapolation of all reciprocal susceptibility (χ-1) curves intercept at a negative temperature ΘN which suggests an antiferromagnetic correlation in the system.
{"title":"Thermodynamic properties of the t-J-U model in the context of high-Tc cuprates","authors":"C. Tarafdar, Krishanu Roy, N. K. Ghosh","doi":"10.1063/5.0061758","DOIUrl":"https://doi.org/10.1063/5.0061758","url":null,"abstract":"Some thermodynamic properties of the high-Tc cuprates have been studied using t-J-U model at different doping (<h>) by an exact method on a tilted square cluster. Low temperature specific heat curves show single-peak structure where the peak-height decreases with increasing <h>. The system becomes more disordered with decreasing hole occupancy. The extrapolation of all reciprocal susceptibility (χ-1) curves intercept at a negative temperature ΘN which suggests an antiferromagnetic correlation in the system.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76143832","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}
Meenal, S. Sanghi, A. Agarwal, E. Arya, A. Kumari, Vibha, Tanvi Bhasin, M. Yadav
Multiferroics composites (BaTiO3)x-(CoFe2O4)1-x (x=0.00 and 0.10) were synthesized via solid-state reaction. Structural properties of the samples were studied by using X-ray diffraction technique at room temperature. XRD patterns confirmed the existence of tetragonal phase with P4mm space group for BaTiO3 and cubic phase with Fd3m space group for CoFe2O4, respectively. By using Rietveld refinement of XRD data verified that both phases are present without any secondary peak. The variation of tangent loss (tanδ) and dielectric constant (εʹ) was studied as a function of frequency in the range of 100Hz to 7MHz at room temperature. The dispersive behavior of both εʹ and tanδ show at lower frequency region but at higher frequency region it remains constant. M-H loop was measured at room temperature that shows the magnetic behavior of composites. INTRODUCTION Multiferroics represent an interesting class of multifunctional materials that carry several ferroic orders simultaneously. Multiferroics composites are materials in which both ferroelectricity and ferromagnetism both exist and this result into a new phenomenon called “Magnetoelectric Effect”. The first multiferroic composite of barium titanate (BaTiO3) and cobalt ferrite (CoFe2O4) was studied by Boomgard et al. in 1974. Recently, these ME composite have become very interesting for their fundamental physics and attractive for various applications such as spintronics, multiple state memories, sensors etc. Above room temperature, single phase ME materials has limited applications because of weak ME effect. Alternatively, piezoelectric/ferrites composite have large ME effect because of their high magnetostriction and piezoelectric coefficient in composites. [1-4]. Recently, multiferroics composite of barium titanate (BaTiO3) and ferrite (like CoFe2O4, NiFe2O4) are found to exhibit large ME response. Barium titanate (BaTiO3) is well known fundamental lead-free perovskite having ABO3 structure. The first perovskite oxide found to exhibit ferroelectric behavior was BaTiO3 in the early 1940’s. BaTiO3 exist rhombohedral, orthorhombic, tetragonal and cubic phase transistions.BaTiO3(BT) has relatively high Curie temperature TC=130 ̊C, the value of piezoelectric constant (d33= 260pC/N) and the order of resistivity (⁓109Ωcm) [5]. On the other hand, cobalt ferrite (CoFe2O4) shows cubic spinal structure having (AB2O4) perovskite structure. CoFe2O4(CFO) has good chemical stability, high coercivity and remanence, moderate saturation magnetization. In this paper, CFO chooses as a ferrite phase and BT as a ferroelectric phase to prepare magnetoelectric composites. To study crystal structure, dielectric and magnetic properties of xBaTiO3-(1-x)CoFe2O4 (x=0.00, 0.10) composites systematically. DETAILS OF EXPERIMENT Polycrystalline composite xBaTiO3-(1-x) CoFe2O4 (x=0.00, 0.10) were synthesized by soild state reaction method. Initially, an appropriate proportion of high purity Sigma Aldrich grade Ba2Co3,TiO2, Co3O4, and
{"title":"Crystal structure, dielectric and magnetic properties of BaTiO3-CoFe2O4 multiferroic composites","authors":"Meenal, S. Sanghi, A. Agarwal, E. Arya, A. Kumari, Vibha, Tanvi Bhasin, M. Yadav","doi":"10.1063/5.0060825","DOIUrl":"https://doi.org/10.1063/5.0060825","url":null,"abstract":"Multiferroics composites (BaTiO3)x-(CoFe2O4)1-x (x=0.00 and 0.10) were synthesized via solid-state reaction. Structural properties of the samples were studied by using X-ray diffraction technique at room temperature. XRD patterns confirmed the existence of tetragonal phase with P4mm space group for BaTiO3 and cubic phase with Fd3m space group for CoFe2O4, respectively. By using Rietveld refinement of XRD data verified that both phases are present without any secondary peak. The variation of tangent loss (tanδ) and dielectric constant (εʹ) was studied as a function of frequency in the range of 100Hz to 7MHz at room temperature. The dispersive behavior of both εʹ and tanδ show at lower frequency region but at higher frequency region it remains constant. M-H loop was measured at room temperature that shows the magnetic behavior of composites. INTRODUCTION Multiferroics represent an interesting class of multifunctional materials that carry several ferroic orders simultaneously. Multiferroics composites are materials in which both ferroelectricity and ferromagnetism both exist and this result into a new phenomenon called “Magnetoelectric Effect”. The first multiferroic composite of barium titanate (BaTiO3) and cobalt ferrite (CoFe2O4) was studied by Boomgard et al. in 1974. Recently, these ME composite have become very interesting for their fundamental physics and attractive for various applications such as spintronics, multiple state memories, sensors etc. Above room temperature, single phase ME materials has limited applications because of weak ME effect. Alternatively, piezoelectric/ferrites composite have large ME effect because of their high magnetostriction and piezoelectric coefficient in composites. [1-4]. Recently, multiferroics composite of barium titanate (BaTiO3) and ferrite (like CoFe2O4, NiFe2O4) are found to exhibit large ME response. Barium titanate (BaTiO3) is well known fundamental lead-free perovskite having ABO3 structure. The first perovskite oxide found to exhibit ferroelectric behavior was BaTiO3 in the early 1940’s. BaTiO3 exist rhombohedral, orthorhombic, tetragonal and cubic phase transistions.BaTiO3(BT) has relatively high Curie temperature TC=130 ̊C, the value of piezoelectric constant (d33= 260pC/N) and the order of resistivity (⁓109Ωcm) [5]. On the other hand, cobalt ferrite (CoFe2O4) shows cubic spinal structure having (AB2O4) perovskite structure. CoFe2O4(CFO) has good chemical stability, high coercivity and remanence, moderate saturation magnetization. In this paper, CFO chooses as a ferrite phase and BT as a ferroelectric phase to prepare magnetoelectric composites. To study crystal structure, dielectric and magnetic properties of xBaTiO3-(1-x)CoFe2O4 (x=0.00, 0.10) composites systematically. DETAILS OF EXPERIMENT Polycrystalline composite xBaTiO3-(1-x) CoFe2O4 (x=0.00, 0.10) were synthesized by soild state reaction method. Initially, an appropriate proportion of high purity Sigma Aldrich grade Ba2Co3,TiO2, Co3O4, and","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81548044","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}
K. Mondal, S. Bera, Ajay Gupta, D. Kumar, A. Gome, V. Reddy
In the present paper, we report on the structural investigation of ferromagnetic metal/organic semiconductor bilayer thin films. Ferromagnetic Co thin films with thickness ~ 150 Å were deposited on organic semiconductor Tris-(8hydroxyquinoline)aluminum, Alq3 thin films with different thickness ranging from 250 Å to 900 Å. Alq3 thin films were deposited on Si(100) substrates by thermal evaporation prior to the deposition of Co thin films using electron beam evaporation technique. X-ray reflectivity measurements have been performed to determine the internal structure of the bilayer samples. Experimental reflectivity data were fitted using Parratt formalism to gain information about thickness, electron density, and roughness of the individual layer. X-ray reflectivity analysis confirms about 13 nm diffusion of Co into underneath Alq3 layer at the Co/ Alq3 interface. It is not possible to clarify whether diffused Co is in the form of atoms or as clusters from the x-ray reflectivity analysis.
本文报道了铁磁性金属/有机半导体双层薄膜的结构研究。在厚度为250 Å ~ 900 Å的有机半导体Tris-(8羟基喹啉)aluminum, Alq3薄膜上沉积了厚度为~ 150 Å的铁磁Co薄膜。在用电子束蒸发技术沉积Co薄膜之前，先用热蒸发技术在Si(100)衬底上沉积Alq3薄膜。x射线反射率测量已被执行，以确定双层样品的内部结构。利用Parratt形式拟合实验反射率数据，获得各层的厚度、电子密度和粗糙度等信息。x射线反射率分析证实Co在Co/ Alq3界面处向Alq3层下方扩散约13 nm。从x射线反射率分析中不可能明确扩散的Co是原子形式还是团簇形式。
{"title":"Structure of Co/Alq3 bilayers: X-ray reflectivity study","authors":"K. Mondal, S. Bera, Ajay Gupta, D. Kumar, A. Gome, V. Reddy","doi":"10.1063/5.0061522","DOIUrl":"https://doi.org/10.1063/5.0061522","url":null,"abstract":"In the present paper, we report on the structural investigation of ferromagnetic metal/organic semiconductor bilayer thin films. Ferromagnetic Co thin films with thickness ~ 150 Å were deposited on organic semiconductor Tris-(8hydroxyquinoline)aluminum, Alq3 thin films with different thickness ranging from 250 Å to 900 Å. Alq3 thin films were deposited on Si(100) substrates by thermal evaporation prior to the deposition of Co thin films using electron beam evaporation technique. X-ray reflectivity measurements have been performed to determine the internal structure of the bilayer samples. Experimental reflectivity data were fitted using Parratt formalism to gain information about thickness, electron density, and roughness of the individual layer. X-ray reflectivity analysis confirms about 13 nm diffusion of Co into underneath Alq3 layer at the Co/ Alq3 interface. It is not possible to clarify whether diffused Co is in the form of atoms or as clusters from the x-ray reflectivity analysis.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85465076","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}
Anil . Kumar, Basappa, N. Hanumanthraju, C. Renuka
At room temperature rotational reorientation dynamics of 3,3'-NBC-Onehas been studied in polar protic solvents using picosecond time resolved spectroscopy.Experimental rotational reorientationtime shows 3,3'-NBC-Onerotates slower when viscosity of solvent increases. Qualitative analysis using Stokes-Einstein-Debye (SED), Geirer-Wirtz (GW) and DoteKivelson-Schwartz (DKS)mechanical frictions theories has been performed. The measured reorientation times of 3,3'-NBCOne is in close agreement with slip boundary condition as predicted by SED theory.
{"title":"Fluorescence relaxation and rotational dynamics of 3,3’-NBC-one in polar protic solvents","authors":"Anil . Kumar, Basappa, N. Hanumanthraju, C. Renuka","doi":"10.1063/5.0060852","DOIUrl":"https://doi.org/10.1063/5.0060852","url":null,"abstract":"At room temperature rotational reorientation dynamics of 3,3'-NBC-Onehas been studied in polar protic solvents using picosecond time resolved spectroscopy.Experimental rotational reorientationtime shows 3,3'-NBC-Onerotates slower when viscosity of solvent increases. Qualitative analysis using Stokes-Einstein-Debye (SED), Geirer-Wirtz (GW) and DoteKivelson-Schwartz (DKS)mechanical frictions theories has been performed. The measured reorientation times of 3,3'-NBCOne is in close agreement with slip boundary condition as predicted by SED theory.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85937806","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}
The size-dependent electrical resistivity (T) of Bi2Te3 nanoparticles is theoretically analyzed. Temperature-dependent resistivity of Bi2Te3 nanoparticles is very sensitive to particle size, it shows clearly semiconducting phase for 22nm particle size, whereas, for 150nm particle size, it shows metallic behaviour dominated by electron-phonon interaction. The resistivity in metallic phase is estimated considering electronphonon scattering mechanism using Bloch-Gruneisen [BG] model of resistivity. Whereas, resistivity in Semiconducting phase has been estimated by small polaron conduction (SPC) mechanism. The theoretically calculated resistivity for various particle sizes in semiconducting and metallic phase of Bi2Te3 nanoparticles shows good agreement with experimental results in wide temperature range.
{"title":"Analysis of size dependent electrical resistivity of Bi2Te3 nanoparticles","authors":"V. Rathore, R. Dixit, R. Kinge, K. Choudhary","doi":"10.1063/5.0062273","DOIUrl":"https://doi.org/10.1063/5.0062273","url":null,"abstract":"The size-dependent electrical resistivity (T) of Bi2Te3 nanoparticles is theoretically analyzed. Temperature-dependent resistivity of Bi2Te3 nanoparticles is very sensitive to particle size, it shows clearly semiconducting phase for 22nm particle size, whereas, for 150nm particle size, it shows metallic behaviour dominated by electron-phonon interaction. The resistivity in metallic phase is estimated considering electronphonon scattering mechanism using Bloch-Gruneisen [BG] model of resistivity. Whereas, resistivity in Semiconducting phase has been estimated by small polaron conduction (SPC) mechanism. The theoretically calculated resistivity for various particle sizes in semiconducting and metallic phase of Bi2Te3 nanoparticles shows good agreement with experimental results in wide temperature range.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"217 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77008556","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}
R. Parlikar, R. Chilwar, A. P. Keche, R. Dudhal, A. V. Raut, K. M. Jadhav
In this work, we tried to investigate the structural properties of cobalt ferrite (CoFe2O4) nanoparticles synthesized via the sol-gel auto-combustion method. The synthesis of cobalt ferrite was carried out by glycine assisted auto-ignition in the sol-gel method. The preparation conditions and sintering temperature during the synthesis creates additional phases in the respective materials, which may play an important role in several applications because of their controlled physical properties. Therefore, CoFe2O4 nanoparticles were considered as a good candidate for high-frequency applications. The X-ray diffraction study of CoFe2O4 nanoparticles was carried out for phase purity. XRD pattern revealed the presence of Bragg’s reflections which belong to the cubic spinel structure. The Miller indices (hkl) were identified using the standard method and the FWHM of the most intense peak (311) was used for the calculation of crystallite size. The crystallite size (t) was estimated using Debye-Scherrer’s formula and found to be 32.16 nm which is following our expectations.
{"title":"Glycine assisted sol-gel synthesis and structural analysis of CoFe2O4 nanoparticles","authors":"R. Parlikar, R. Chilwar, A. P. Keche, R. Dudhal, A. V. Raut, K. M. Jadhav","doi":"10.1063/5.0061127","DOIUrl":"https://doi.org/10.1063/5.0061127","url":null,"abstract":"In this work, we tried to investigate the structural properties of cobalt ferrite (CoFe2O4) nanoparticles synthesized via the sol-gel auto-combustion method. The synthesis of cobalt ferrite was carried out by glycine assisted auto-ignition in the sol-gel method. The preparation conditions and sintering temperature during the synthesis creates additional phases in the respective materials, which may play an important role in several applications because of their controlled physical properties. Therefore, CoFe2O4 nanoparticles were considered as a good candidate for high-frequency applications. The X-ray diffraction study of CoFe2O4 nanoparticles was carried out for phase purity. XRD pattern revealed the presence of Bragg’s reflections which belong to the cubic spinel structure. The Miller indices (hkl) were identified using the standard method and the FWHM of the most intense peak (311) was used for the calculation of crystallite size. The crystallite size (t) was estimated using Debye-Scherrer’s formula and found to be 32.16 nm which is following our expectations.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"92 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80926249","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}
Presently the Nanoscience is the principle topic among the Researcher due to drastic properties and size effective advanced applications of nano scale materials in various field of technology. In present paper nanostructured material of Sn1-xFexO2(where x=0.05, 0.1, 0.15) sample have been prepared successfully by using micro-wave-assisted co-precipitation technique followed by sintering at 6000c for six hours and formation of powder sample in agate motar. The structure and morphology of as-synthesized samples and calcined samples have been examined by diffraction through X-Rays, UV-Vis spectroscopy, FTIR spectra and Scanning of samples by electron microscope techniques respectively. The analysis of X-Ray diffraction snapshots proving that the samples are crystalline in nature and calculated grain size estimated by Debye Scherrer’s formulation is 16.2 nm and analyzed structure is tetragonal rutile structure .The Uv visible absorption spectrograph is used to analyze the optical band gap and shows that the red shifting from 4.1 to 3.64 eV in samples with increment of doping concentration .The FTIR transmission spectra of various samples reveals that the incorporation of Fe ion with various oxidation state by replacing position of Sn ion in SnO2 rutile structure with mainly metal oxide peaks at 562cm-1 for SnO2 and 480 cm-1 for Fe2O3.The SEM images shows that the particles are polycrystalline in nature and truncated in shapes.
{"title":"To study the synthesis mechanism and effect of dopant concentration of Fe ion incorporate in SnO2 nanostructured materials","authors":"Saneh Lata, Rajesh Kumar","doi":"10.1063/5.0061862","DOIUrl":"https://doi.org/10.1063/5.0061862","url":null,"abstract":"Presently the Nanoscience is the principle topic among the Researcher due to drastic properties and size effective advanced applications of nano scale materials in various field of technology. In present paper nanostructured material of Sn1-xFexO2(where x=0.05, 0.1, 0.15) sample have been prepared successfully by using micro-wave-assisted co-precipitation technique followed by sintering at 6000c for six hours and formation of powder sample in agate motar. The structure and morphology of as-synthesized samples and calcined samples have been examined by diffraction through X-Rays, UV-Vis spectroscopy, FTIR spectra and Scanning of samples by electron microscope techniques respectively. The analysis of X-Ray diffraction snapshots proving that the samples are crystalline in nature and calculated grain size estimated by Debye Scherrer’s formulation is 16.2 nm and analyzed structure is tetragonal rutile structure .The Uv visible absorption spectrograph is used to analyze the optical band gap and shows that the red shifting from 4.1 to 3.64 eV in samples with increment of doping concentration .The FTIR transmission spectra of various samples reveals that the incorporation of Fe ion with various oxidation state by replacing position of Sn ion in SnO2 rutile structure with mainly metal oxide peaks at 562cm-1 for SnO2 and 480 cm-1 for Fe2O3.The SEM images shows that the particles are polycrystalline in nature and truncated in shapes.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81234706","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}
Through dip coating method monodisperse nickel nanoparticles assisted carbon membrane was prepared on porous alumina disc support. The coating solution was prepared by blending of thermally stable polymer polyphenylene oxide (PPO) and thermally labile polymer polyvinylpyrrolidone (PVP) followed by addition of nickel nanoparticles. Size of nanoparticles, surface porosity, average pore size, element composition and optical properties of the membrane were investigated by means of different techniques such as XRD, FE-SEM, EDS and UV-Visible spectrometer Incorporation of nano-sized nickel in polymer matrix causes increase in pore size from 0.022 μm to 0.076 μm as well as porosity and decrease in optical band gap from 5.44 eV to 5.09 eV of membrane.
{"title":"Preparation and optical properties of nickel nanoparticles implanted carbon membranes","authors":"Disha Harinkhere, K. Choudhary, N. Kaurav","doi":"10.1063/5.0061269","DOIUrl":"https://doi.org/10.1063/5.0061269","url":null,"abstract":"Through dip coating method monodisperse nickel nanoparticles assisted carbon membrane was prepared on porous alumina disc support. The coating solution was prepared by blending of thermally stable polymer polyphenylene oxide (PPO) and thermally labile polymer polyvinylpyrrolidone (PVP) followed by addition of nickel nanoparticles. Size of nanoparticles, surface porosity, average pore size, element composition and optical properties of the membrane were investigated by means of different techniques such as XRD, FE-SEM, EDS and UV-Visible spectrometer Incorporation of nano-sized nickel in polymer matrix causes increase in pore size from 0.022 μm to 0.076 μm as well as porosity and decrease in optical band gap from 5.44 eV to 5.09 eV of membrane.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"78 7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85412386","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}
The study of recent literature reveals that the discovery of high Tc (Tc = 39 K) superconductivity (SC) in MgB2 has generated considerable interest in this binary system. A Most Unusual Superconductor and How It Works Firstprinciples calculation explains the strange behavior of magnesium diboride. The phonon mediated BCS type mechanism has been acknowledged to be a good tool for its theoretical study via McMillan formalism. Recent studies are the milestones in this direction. In this paper, we report the Harrison’s First Principle Pseudopotential (HFPP) study of this system so as to bring out the effectiveness of this technique which has not been explored as yet. We have studied the impact of core energy eigenvalues on the superconducting (SC) parameters of MgB2.
{"title":"Ab initio studies of binary alloy clusters","authors":"A.Suresh Kumar, Rakesh Sharma","doi":"10.1063/5.0062235","DOIUrl":"https://doi.org/10.1063/5.0062235","url":null,"abstract":"The study of recent literature reveals that the discovery of high Tc (Tc = 39 K) superconductivity (SC) in MgB2 has generated considerable interest in this binary system. A Most Unusual Superconductor and How It Works Firstprinciples calculation explains the strange behavior of magnesium diboride. The phonon mediated BCS type mechanism has been acknowledged to be a good tool for its theoretical study via McMillan formalism. Recent studies are the milestones in this direction. In this paper, we report the Harrison’s First Principle Pseudopotential (HFPP) study of this system so as to bring out the effectiveness of this technique which has not been explored as yet. We have studied the impact of core energy eigenvalues on the superconducting (SC) parameters of MgB2.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80117543","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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