Shyamkant Wasudeorao Anwane
@sscnagpur.ac.in
Professor & Head, Department of Physics
Shri Shivaji Education Society Amravati's SCIENCE COLLEGE, Congress Nagar, NAGPUR 440012 (Maharashtra) INDIA
Dr Shyamkant Anwane, Professor and Head, Department of Physics, Shri Shivaji Science College, Nagpur has been involved in teaching and research Physics for the past 25 years. During doctoral research, he was awarded the prestigious Senior Research Fellowship by the Council of Scientific & Industrial Research, New Delhi. He has completed a minor research project funded by University Grants Commission, New Delhi. He is nominated on the Board of MAPLE Ambassador for the SAARC region.
EDUCATION
Educational qualification:
• B.Sc. (Physics, Mathematics and Electronics) from Amravati University, Amravati in 1990 with 68.4% marks.
• M.Sc. in Physics (specialization in Electronics) from Amravati University, Amravati in 1992 with 68.7 % marks.
• Ph.D. in Physics from Nagpur University, Nagpur in May 2000 for the thesis entitled Development of Silver Sulphate Based Solid Electrolytes from Electrochemical Gas Sensor Point of View.
RESEARCH INTERESTS
Materials Science, Nano-technology, General Relativity, Special Relativity
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Shahin Sayyad, S. A. Acharya, S. A. Pande, Tanveer Quazi, and S. W. Anwane
Informa UK Limited
Abstract The polymer composite Bismuth Titanate based lead-free binary system Nylon-11/0.75Bi0.5Na0.5TiO3-0.25SrTiO3 (N11/BNTST) has been developed using the solution casting method in different ratio for advanced energy system. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) were used to confirm the structure. XRD pattern of all samples shows the N11 and rhombohedral phase of BNT-ST with the presence of both phases for the composite. The surface microstructure of a nanocomposites film with a 70:30 N11:BNT-ST composition reveals homogenous BNT-ST nanoparticle dispersion in Nylon-11 matrix with negligible holes. However, compositions with a larger percentage of BNT-ST show agglomeration with a large number of pores, which lowers the dielectric constant and increases dielectric loss. At room temperature, the electrical characteristics of the produced N11/BNT-ST composite are examined periodically. The dielectric behavior of the materials exhibit a decrease in dielectric constant as well as loss with increasing frequency. The experimental data of the N11/BNTST, comparing the pure N11 polymer film to composite, the dielectric characteristics have significantly improved. The maximum dielectric response has been observed for 70N11-30BNTST composition. So, N11/BNTST composite has been shown to be a viable option for applications requiring electronic capacitive energy storage.
Ruhi Naz Nayyer, Shyamkant Anwane, Vishwajit Gaikwad, Vasant Sathe, and Smita Acharya
Royal Society of Chemistry (RSC)
Dy, W co-doped La2Mo2O9 (LMX) system is explored to understand the order–disorder phase transition, dynamical disorder state and their influence on the oxy-ion diffusion mechanism.
C. Ruchir Kumar, Y. M. Nimje, and S. W. Anwane
IOP Publishing
Abstract The pure green and turquoise green-emitting organometallic complex of strontium(II) with 8-Hydroxyquinoline and 2-methyl-8-hydroxyquinoline were synthesized by using Co-precipitation method. The structure of Sr(8-Hq)2 and Sr(2-Me-8Hq)2 was studied with Fourier transform infrared spectroscopy, and the vibrational peak of the Sr-O bond was found at 503 cm−1 and 499 cm−1 respectively. The X-Ray diffraction spectra are taken and compared with XRD data of raw materials to confirm the formation of the complex. Further UV-Absorption was studied, and the optical band gap is 2.813eV and 2.852eV, respectively, by using Taucs plot method. The photoluminescent study carried out in solution medium, and the emission wavelength found at 526nm and 509nm, and the color is confirmed using the CIE plot method, and the emission color is pure green and turquoise green. The complex may have significant applications as emitters in organic optoelectronic devices.
Chaitali N. Pangul, Shyamkant W. Anwane, and Subhash B. Kondawar
Springer Singapore
S. W. Anwane and Y. S. Anwane
Springer Science and Business Media LLC
Chaitali N. Pangul, Shyamkant W. Anwane, and Subhash B. Kondawar
Elsevier BV
Chaitali Niranjan Pangul, Shyamkant Wasudeorao Anwane, and Subhash Baburao Kondawar
Wiley
Dy3+ -doped ZnO nanofibres with diameters from 200 to 500 nm were made using an electrospinning technique. The as-fabricated amorphous nanofibres resulted in good crystalline continuous nanofibres through calcination. Dy3+ -doped ZnO nanofibres were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), ultraviolet-visible (UV-vis) light spectroscopy, Fourier transform infrared spectroscopy (FTIR), and photoluminescence (PL). XRD showed the well defined peaks of ZnO. UV-vis spectra showed a good absorption band at 360 nm. FTIR spectra showed a Zn-O stretching vibration confirming the presence of ZnO. Photoluminescence spectra of Dy3+ -doped ZnO nanofibres showed an emission peak in the visible region that was free from any ZnO defect emission. Emissions at 480 nm and 575 nm in the Dy3+ -doped ZnO nanofibres were the characteristic peaks of dopant Dy3+ and implied efficient energy transfer from host to dopant. Luminescence intensity was found to be increased with increasing doping concentration and reduction in nanofibre diameter. Colour coordinates were calculated from photometric characterizations, which resembled the properties for warm white lighting devices.
S.W. Anwane
John Wiley & Sons, Inc.
S. W. Anwane
International Association of Advanced Materials
Composite materials which are heterogeneous mixtures of two or more solid phases offer value added properties for device applications. When ion conducting Ag2SO4 is dispersed with insulating BaTiO3, enhanced electrical properties are observed along with improved surface morphology. The electrical properties have been derived from the Complex Impedance Spectroscopic studies. Arrhenius Plot, Concentration and Temperature dependent conductivity and activation energy have also been studied. The ionic transference number of the composite system remains unchanged on dispersion thereby retaining its category as Solid Ionic Conductor (SIC). Moreover, 30 Wt% BaTiO3 dispersed in Ag2SO4 offers promisingly enhanced ionic conductivity and reduced activation energy of ion migration. This material has further scope for its utilization as a silver ion conductor in electrochemical applications like solid state batteries, gas sensors etc. The results obtained fit well in the established theories of composites.
S. B. Kondawar, S. W. Anwane, D. V. Nandanwar, and S. R. Dhakate
International Association of Advanced Materials
Conducting polymer nanocomposites (PANI-CNT and POAS-CNT) have been synthesized by polymerization of aniline (ANI)/ o-anisidine (OAS) in the presence of functionalized multiwall carbon nanotubes (MWCNTs). These nanocomposites have been characterized by UV-VIS, FTIR and SEM to study the effect of incorporation of MWCNTs on the morphology, structure and crystalline of the conducting polyaniline and its substitute derivate poly(o-anisidine). UV-VIS spectra shows that polaron-π* and π-π* transition bands of the PANI/POAS chain shifted to longer wavelengths, indicating the interaction between quinoid rings and MWCNTs. FTIR spectra shows that the interaction between the MWCNTs and PANI/POAS may result in ‘charge transfer’, whereby the sp 2 carbons of the MWCNTs compete with dopant ions [Cl – ] and perturb the H-bond, resulting an increase in the N-H stretching intensity. Electron microscopy reveals that the interaction between the quinoid ring of PANI/POAS and the MWCNTs causes PANI and POAS polymer chains to be adsorbed at the surface of MWCNTs, thus forming a tubular core surrounding the MWCNTs. The nanocomposites showed high electrical conductivity compared to pure PANI/POAS. Further, PANI-CNT showed high electrical conductivity compared to that of POAS-CNT. Copyright © 2013 VBRI Press.
S. W. Anwane
International Association of Advanced Materials
Detailed impedance spectroscopic studies are carried out by incorporating various guest iso-valent cations within the solid solubility limit having different ionic radii in Ag2SO4. The solid solubility limits up to x = 3 mole% cation doped Ag2SO4 are set with XRD, SEM, IR and DSC techniques. A major dependence of conductivity on the ionic size of the doped iso-valent cations is observed. The ionic conductivity is found to increase with the incorporation of a guest cation that creates appropriate distortion factor in iso-valent cation doped Ag2SO4. The conductivity of Ag2SO4 is found to be dependent on the ionic size of the guest cation, particularly in the low-temperature modification of Ag2SO4 (β-phase). These results could throw light on the fundamental conduction mechanism in Ag2SO4 and also on the criterion of selecting the impurity cation in the classical doping method. The optimized solid electrolytes can then be utilized for their technological applications in electrochemical devices such as SOx sensors and thermal batteries. Copyright © 2012 VBRI Press.
S.W. Anwane and R.S. Anwane
International Association of Advanced Materials
Optimum alio-valent doping with yttrium sulphate creating 7% vacancy concentration provided promising features from sensor application view. This provides a better option over green Silver Sulphate. The sensors fabricated with the modified sulphate based silver ion conducting solid electrolyte, silver-silver sulphate reference electrode and test gas (Pt) electrodes has been tested over the range of 50-1000 ppm SO2 blended in constant oxygen-partial pressure and argon at 400 o C. A promising sensor characteristic behaviour is exhibited by the modified electrolyte - solid solution of silver sulphate with yttrium. Copyright © 2012 VBRI Press.
K. Singh, S.M. Pande, S.W. Anwane, and S.S. Bhoga
Springer Science and Business Media LLC
K. Singh, S.W. Anwane, and S.S. Bhoga
Elsevier BV