MADHURI WUPPULLURI
Verified email at gmail.com
Assistant Professor Senior Grade, Centre for Crystal Growth, Department of Physics
VIT Vellore
EDUCATION
PhD in Physics
RESEARCH INTERESTS
Ferrites
ferroelectrics
piezoelectrics
multiferroics
ceramics
ceramic composites
electroceramics
magnetic materials
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
T. Avanish Babu and W. Madhuri
Chemical Physics Letters, ISSN: 00092614, Volume: 799, Published: 16 July 2022
Elsevier BV
Basil Chacko, Ashish Roy, A. Melbin Richard, J. Swathy, Babu T. Avanish, and W. Madhuri
Materials Chemistry and Physics, ISSN: 02540584, Volume: 276, Published: 15 January 2022
Elsevier BV
Ashish Roy, W Madhuri, and Basil Chacko
ECS Transactions, ISSN: 19386737, eISSN: 19385862, Volume: 107, Pages: 16199-16211, Published: 2022
The Electrochemical Society
The element carbon has been used as a source of energy for the past few hundred years, and now in this era of technology, carbon has played a significant and very prominent role in almost all fields of science and technology. The interesting characteristic of carbon is its ability to form many allotropes due to its valency. In recent decades, various allotropes and forms of carbon have been invented, including fullerenes, carbon nanotubes (CNTs), and graphene. So as an honor to this marvelous element, we humans should know about its various forms of existence. In this present work, we shed light on structural studies of commercially available and self-synthesized carbon nanoparticles. A brief introduction is given to the types, structures, and shapes of the allotropes of carbon for a better understanding. The crystallographic structure of the carbon nanomaterials (CNMs) is investigated by X-ray diffraction (XRD) peak profile analysis. The microstructure is characterized based on crystallite size, interplanar spacing, density, strain, and dislocation density. Raman spectroscopy is particularly well studied to characterize the molecular morphology of CNMs.
NOORMOHAMMAD SHAREEF S and W. Madhuri
Polymer Bulletin, ISSN: 01700839, eISSN: 14362449, Published: 2022
Springer Science and Business Media LLC
BaTiO3 (BT)-doped polyvinyl alcohol (PVA) and polyvinyl pyrrolidone (PVP) blend nanocomposites are prepared by a simple solution casting method. The PVA/PVP/BT polymer nanocomposites (PNCs) are characterized with Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), UV–Vis spectroscopy and universal testing machine. The dielectric behaviour of PVA/PVP/BT PNCs is studied from 50 to 5 MHz at a temperature ranging from 35 to 155 °C. The C–O, C=O stretching peaks obtained from FTIR results confirm strong miscibility between PVA/PVP and Ti–O bands. The peaks in XRD data disclose the crystalline nature of the filler in the PNCs. From SEM results, good miscibility is found between the polymers and the filler. AFM study reveals increased roughness in the PNCs with an increase in BT%. The absorption spectrum is noticed to have shifted towards higher wavelengths with BT concentration. The dielectric constant (ε′) is found to be maximum for 5 wt% of BT in the PNCs that also exhibited maximum toughness and Young’s modulus.
S. Prathap and W. Madhuri
Journal of Electronic Materials, ISSN: 03615235, eISSN: 1543186X, Pages: 7005-7016, Published: December 2021
Springer Science and Business Media LLC
Pb1-xCoxFe12O19 nano-crystallites with an average crystal diameter varying between 74 and 86 nm are prepared via sol-gel auto-combustion. The X-ray diffraction (XRD) studies confirmed the single-phase P63/mmc space group. The surface morphology of the samples carried out using a field emission scanning electron microscope (FESEM) revealed the long hexagonal structure of the ferrites. Dielectric characterization is studied from room temperature to 800 K and in the frequency range of 100 Hz to 5 MHz. The ferrites exhibited two transition peaks in this temperature region which are attributed to phase transitions between ferroelectric to anti-ferroelectric and anti-ferroelectric to paraelectric phase. The composition x = 0.75 is suitable for high definition television deflection yokes for it has exhibited the highest dielectric constant, low ac electrical conductivity.
Indian Journal of Pure and Applied Physics, ISSN: 00195596, eISSN: 09751041, Pages: 711-714, Published: October 2021
S. Prathap, W. Madhuri, and Sher Singh Meena
Materials Characterization, ISSN: 10445803, Volume: 177, Published: July 2021
Elsevier BV
D. Arthisree, W. Madhuri, N. Saravanan, B. Dinesh, S. Saikrithika, and Annamalai Senthil Kumar
Journal of Energy Storage, eISSN: 2352152X, Published: March 2021
Elsevier BV
C. Pavithra, W. Madhuri, and S. Roopas Kiran
Materials Chemistry and Physics, ISSN: 02540584, Volume: 258, Published: 15 January 2021
Elsevier BV
Indian Journal of Pure and Applied Physics, ISSN: 00195596, eISSN: 09751041, Pages: 775-778, Published: 2021
J. Gurusiddappa, W. Madhuri, K. Priya Dasan, and R. Padma Suvarna
AIP Conference Proceedings, ISSN: 0094243X, eISSN: 15517616, Volume: 2244, Published: 26 June 2020
AIP Publishing
Isha S. Kapte, Sucharit Niyogi, Parvez J. Qureshi, C. Pavithra, W. Madhuri, and D. Zarena
AIP Conference Proceedings, ISSN: 0094243X, eISSN: 15517616, Volume: 2220, Published: 4 May 2020
AIP Publishing
D. Arthisree and W. Madhuri
International Journal of Hydrogen Energy, ISSN: 03603199, Pages: 9317-9327, Published: 20 March 2020
Elsevier BV
Chandra Babu Naidu K., Prathap S., and Madhuri W.
Journal of Superconductivity and Novel Magnetism, ISSN: 15571939, eISSN: 15571947, Pages: 417-425, Published: 1 February 2020
Springer Science and Business Media LLC
Pavithra C. and Madhuri W.
Journal of Materials Research and Technology, ISSN: 22387854, Pages: 3097-3101, Published: May 2019
Elsevier BV
S. Prathap and W. Madhuri
Applied Physics A: Materials Science and Processing, ISSN: 09478396, eISSN: 14320630, Volume: 125, Published: 1 May 2019
Springer Science and Business Media LLC
K. Nivetha and W. Madhuri
Optics and Laser Technology, ISSN: 00303992, Volume: 109, Pages: 496-503, Published: January 2019
Elsevier BV
S. Prathap, W. Madhuri, and Sher Singh Meena
Materials Chemistry and Physics, ISSN: 02540584, Volume: 220, Pages: 137-148, Published: 1 December 2018
Elsevier BV
C. Pavithra and W. Madhuri
Journal of Non-Crystalline Solids, ISSN: 00223093, Volume: 500, Pages: 49-60, Published: 15 November 2018
Elsevier BV
K. Chandra Babu Naidu and Madhuri Wuppulluri
IEEE Transactions on Magnetics, ISSN: 00189464, Published: September 2018
Institute of Electrical and Electronics Engineers (IEEE)
Ni1−xMgxFe2O4 (x = 0.2–0.8) nanoparticles are prepared by hydrothermal synthesis followed by microwave processing. The effect of microwave processing in reducing the required heat treatment is discussed. The samples are characterized by powder X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometer, and LCR bridge. Microwave processing has enhanced the chemical reaction to form ferrites without any stray ferric oxide phases. Microscopic images have confirmed that the particles still retain nanoscale after microwave processing. An appreciably high magnetic moment is noticed. The experimental magnetic moment is used to estimate the cation distribution in tetrahedral and octahedral sites. Temperature and frequency dependence of initial permeability is discussed in the light of magnetic spin canting.
Snehajyoti Saha, Madhuri Wuppulluri, Maria Krautz, Juliane Thielsch, Jayanta Das, Anja Waske, Joachim Seifert, and Lars Schinke
AIP Conference Proceedings, ISSN: 0094243X, eISSN: 15517616, Volume: 1992, Published: 3 August 2018
Author(s)
C. Pavithra and W. Madhuri
Materials Chemistry and Physics, ISSN: 02540584, Volume: 211, Pages: 144-149, Published: 1 June 2018
Elsevier BV
C. Pavithra and W. Madhuri
Journal of Sol-Gel Science and Technology, ISSN: 09280707, eISSN: 15734846, Pages: 437-445, Published: 1 February 2018
Springer Science and Business Media LLC
Pavithra Chitrarasan and Madhuri Wuppulluri
Journal of Materials Science: Materials in Electronics, ISSN: 09574522, eISSN: 1573482X, Pages: 2259-2266, Published: 1 February 2018
Springer Science and Business Media LLC
The series of Li(4−2x)NixTi2O6 (where x = 0, 0.25, 0.50 and 0.75) is synthesized by sol–gel method and further microwave processed. The X-ray diffraction confirmed the single phase formation of monoclinic crystal structure and the average crystal size is calculated to be between 35 and 44 nm. The Fourier transformation infra-red analysis confirmed the vibrational bond frequency of the sample. The high-resolution scanning electron microscope revealed uniform morphology and the average particle size is found to be 15–30 nm. The temperature dependent dielectric constant is measured in the temperature range 30–560 °C. A drastic change in the dielectric is noticed after 370 °C in all the compositions. The complex impedance spectrum confirms the electron hopping conduction and non-Debye type behaviour at all the recorded temperatures. The Cole–Cole plots suggested grain conduction for all the compositions except for x = 0.75, where other contributions are suspected.
Chandra Babu Naidu Kadiyala and Madhuri Wuppulluri
Phase Transitions, ISSN: 01411594, eISSN: 10290338, Pages: 847-862, Published: 2 September 2017
Informa UK Limited
ABSTRACT The present work mainly focuses on the preparation of magnesium-doped nickel ferrite nanoparticles via hydrothermal technique. Diffraction pattern attributes the formation of pure cubic spinel phases after microwave heating the samples at 500 °C for 10 min. In addition to the diffraction study, the removal of lepidocrocite (γ-FeO (OH)) signal in an infrared spectrum also confirms the phase purity due to microwave heating. Larger optical band gap (Eg) values are acquired for nanostructures varying between 1.73 and 1.86 eV. The surface morphology is analyzed using transmission electron microscope. The obtained particle sizes are in the range of ∼50–85 nm. The M-H loop analysis shows that 50% of Mg-dopant in Ni-ferrite system exhibits the highest saturation magnetization ∼191 emu/g. The behavior of complex dielectric modulus is illustrated in the specific frequency range of 100 Hz to 5 MHz for investigating the space charge polarization mechanism.