Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Microwave sintered magnesium ferrite (MF) nanoparticles are synthesised by hydrothermal technique. X-ray diffraction revealed pure spinel phase but low crystallinity. Synthesised MF is observed to be in nanoscale under scanning electron and transmission electron microscopes. MF is characterised further by Fourier transform infrared and UV-visible spectrometers for vibrational bands and optical band gap information. Electric and magnetic characterizations revealed low conductivity, dielectric loss, magnetic loss and fairly good initial permeability. High coercivity and M-H loop area of MF indicate the hard magnetic nature. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.

VIT Unitversity

Department of Computational Intelligence

School of Computer Science and Engineering

Vellore Campus

Department of Physics

School of Advanced Sciences

Journal of Superconductivity and Novel Magnetism

Effect of Microwave Heat Treatment on Hydrothermal Synthesis of Nano-MgFe2O4

Nano-size photocatalysts exhibit multifunctional properties that opened the door for improved efficiency in energy, environment, and health care applications. Among the diversity of catalyst Quantum dots are a class of nanomaterials having a particle size between 2 and 10 nm, showing unique optoelectrical properties that are limited to some of the metal, metal oxide, metal chalcogenides, and carbon-based nanostructures. These unique characteristics arise from either pristine or binary/ternary composites where noble metal/metal oxide/metal chalcogenide/carbon quantum dots are anchored on the surface of semiconductor photocatalyst. It emphasized that properties, as well as performance of photocatalytic materials, are greatly influenced by the choice of synthesis methods and experimental conditions. Among the chemical methods, photo-deposition, precipitation, and chemical reduction, are the three most influential synthesis approaches. Further, two types of quantum dots namely metal based and carbon-based materials have been highlighted. Based on the optical, electrical and surface properties, quantum dots based photocatalysts have been divided into three categories namely (a) photocatalyst (b) co-catalyst and (c) photo-sensitizer. They showed enhanced photocatalytic performance for hydrogen production under visible/UV-visible light irradiation. Often, pristine metal chalcogenides as well as metal/metal oxide/carbon quantum dots attached to a semiconductor particle exhibit enhanced the photocatalytic activity for hydrogen production through absorption of visible light. Alternatively, noble metal quantum dots, which provide plenty of defects/active sites facilitate continuous hydrogen production. For instance, production of hydrogen in the presence of sacrificial agents using metal chalcogenides, metal oxides, and coinage metals based catalysts such as CdS/MoS2 (99,000 μmol h-1g-1) TiO2-Ni(OH)2 (47,195 μmol h-1g-1) and Cu/Ag-TiO2 nanotubes (56,167 μmol h-1g-1) have been reported. Among the carbon-based nanostructures, graphitic C3N4 and carbon quantum dots composites displayed enhanced hydrogen gas (116.1 μmol h-1) production via overall water splitting. This review accounts recent findings on various chemical approaches used for quantum dots synthesis and their improved materials properties leading to enhanced hydrogen production particularly under visible light irradiation. Finally, the avenue to improve quantum efficiency further is proposed.

World University root node

Department of Chemistry

VIT Business School

Chennai Campus

Journal of Environmental Management

Sustainable hydrogen production for the greener environment by quantum dots-based efficient photocatalysts: A review

Department of Bio-Medical Sciences

School of Bio Sciences and Technology

Journal of Histotechnology

A comparison of hepatoprotective activity of Bacoside to Silymarin treatment against a combined Isoniazid and Rifampin-induced hepatotoxicity in female Wistar rats

One-dimensional lead hexaferrite (PbFe12O19) nanofibers are produced using electrospinning technology combined with sol–gel followed by muffle furnace heating. PVP/DMF is used as reductant to form precursor solution for lead hexaferrite nanofiber. Polycrystalline nanofibers with an average diameter of 145 nm have been prepared by electrospinning method. The structural features of the sintered nanofibers are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and EDX. The obtained PbFe12O19 nanofibers showed a hexagonal structure after sintering. The SEM image clearly shows the fibrous morphology of PbFe12O19. Vibrating sample magnetometer (VSM) revealed very low coercivity and fairly high saturation magnetization. The fiber exhibited a ferromagnetic behaviour at room temperature, which is attributed to the nanometre-size of PbFe12O19 nanofibers. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

Applied Physics A

Evidence of magnetism in electrospun PbFe12O19 nanofibers

The adaptation of data and resource sharing in health care is more popular and maintaining of Electronic Health Records (EHR) is efficient to doctors and patients. Nowadays storing of health records in cloud environment is more popular and low cost with scalable of data to access. But the security of those data assurance will be less in current technology. Health care started using a storing of data in cloud with minimal level of security. We propose method to provide data security and access control to the constraints patients or doctors to access the data using encryption of unique identification. We introduce a multi-user encryption with authorization. © Springer Nature Singapore Pte Ltd. 2019.

Department of Software Systems

Department of Analytics

Smart Intelligent Computing and Applications Smart Innovation, Systems and Technologies

Design of EHR in Cloud with Security

The effect of iron deficiency on the structural, electrical and magnetic properties of the nano PbFe12-xO19-δ (where x = 0.0, 0.25, 0.50, 0.75 and 1.0) hexaferrites prepared by sol-gel auto combustion and further processed by microwaves is presented. The structure studied using transmission electron microscope (TEM) showed hexagonal cylindrical particles with an average size of ∼20 nm. Selected area electron diffraction (SAED) reflected highly crystalline nature of these nanoparticles. From the dielectric characterizations ac-conductivity, dielectric constant and loss tangent are analysed for pure and modified PbFe12-xO19-δ hexaferrites. The magnetic analysis revealed the formation of single-domain structure. Saturation magnetization (MS) decreases from 63.2 (x = 0) to 38.2 (x = 1.0) emu/g with increasing the Fe ions deficiency. Room temperature Mössbauer spectra show five sextets for all compositions confirmed the single phase formation. The relative area of 12k (↑) site decreases and 4f2 (↓) increases drastically with increasing the Fe ions deficiency in Pb-hexaferrites. © 2018 Elsevier B.V.

Materials Chemistry and Physics

Effect of non-stoichiometry in lead hexaferrites on magnetic and dielectric properties

In smart healthcare environments, healthcare providers are a lot of enthusiasm to move their electronic anamnesis organizations to clouds. Rather than building and preserving committed information storing servers, this paradigm permits toward realize inferior operative price besides higher capability with different care suppliers. Nevertheless, the implementation of cloud imagining in healthcare organizations might correspondingly nurture numerous safety encounters related to authentication, identity management, access management, trust management, and so on. The advent of the cloud supervision and its accompanying encounters, constructing a protected automated health record in a cloud processing surroundings has fascinated lots of consideration in each healthcare commercial and speculative private. Cloud computing construct is turning into preferred information technology (IT) organization for assisting EHR association and incorporation. During this study, we tend to discuss security ideas associated with electronic health records sharing and combination in healthcare clouds and analyze the arising safety and confidentiality problems in contact and controlling of electronic health records. This documents objective is the present-day come transversely that arise with the consumption of the cloud for EHR dedications. © 2018 American Scientific Publishers.

Journal of Computational and Theoretical Nanoscience

Electronic Health Records (EHR) and Cloud Protection: The Present Problems

The effect of iron deficiency on the structural, electrical, ferroelectric and magnetic properties of nano PbFe12-xO19-δ (where x=0.0, 0.25, 0.50, 0.75, 1.0) hexaferrites prepared by sol-gel auto combustion and processed by microwaves are investigated. X-ray analysis confirms single phase magneto-plumbite phase formation. The surface morphology is studied from Field Emission Scanning Electron Microscope. Further, optical properties are investigated using Fourier Transform Infrared spectra and UV–visible spectra. AC electrical conductivity is estimated as a function of temperature and frequency in the range of room temperature (RT) to 500 °C and 100 Hz to 5MHz. AC electrical conduction analysis shows that conduction is mainly due to small polaron hopping mechanism. The variation of polarization with applied electric field exhibits hysteresis loop confirming the ferroelectric nature. The initial permeability studies with varying temperature reveals that the Curie transition temperature for the present series is around 400 °C. Variation of initial permeability with frequency ranging from 100 to 5 MHz shows a constant value (except for x=0.0) opening avenues for high frequency applications. © 2017 Elsevier B.V.

Journal of Magnetism and Magnetic Materials

Multiferroic properties of microwave sintered PbFe 12−x O 19−δ

Research Journal of Pharmacy and Technology

Isolation, Screening and partial identification of indigenous biosurfactant bacteria from oil contaminated soil

PbFe12-xO19-δ (x= 0, 0.25, 0.50, 0.75 &amp; 0.1) ceramics are synthesized via sol-gel auto-combustion technique and sintered at a temperature of 900°C for 45 min. using microwave furnace. The XRD confirms the M-type hexagonal phase and the crystallite size arefound to be varying between 11-45 nm. High dielectric constant (ϵr) of 140.09 and low loss (tan δ) of 0.057 are noticed at 5 MHz which makes these hexaferrites suitable for high capacity condenser and low electric noise device manufacturing applications. © 2016 Author(s).