Praveen Chenna

ORCID: 0009-0005-0160-3852
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About
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Research Areas
  • Electromagnetic wave absorption materials
  • Advanced Antenna and Metasurface Technologies
  • Microwave Dielectric Ceramics Synthesis
  • Transition Metal Oxide Nanomaterials
  • Luminescence Properties of Advanced Materials
  • Perovskite Materials and Applications
  • Conducting polymers and applications
  • Organic Light-Emitting Diodes Research

National Institute of Technology Goa
2023-2024

In this work, we used a simple sol-gel synthesis technique to prepare hexagonal Ba 3 (VO 4 ) 2 . X-ray diffraction (XRD), Fourier transform infrared (FTIR), and Raman spectroscopy were performed, confirming that has structure. To investigate the influence of interfacial interactions at grain boundaries on microwave absorption, AFM studies performed. UV–vis show direct indirect optical energy band gaps determined as 3.81 eV 3.25 eV, respectively. The dielectric reveal constant ( ε ׳) ranges...

10.1149/2162-8777/ad1ed0 article EN ECS Journal of Solid State Science and Technology 2024-01-01

The current study explores the influence of Zinc (Zn) doping on crystallography, optical behavior, dielectric properties, and microwave absorption characteristics hexagonal Barium Vanadate (Ba 3 (VO 4 ) 2 ). Samples were systematically synthesized with Zn concentrations x = 0, 0.05, 0.1, 0.15, 0.2 mol%, resulting in Ba 3–x . Employing various characterization techniques, alterations structural, optical, electrical responses due to incremental incorporation are reported. UV–VIS DRS spectra...

10.1149/2162-8777/ad4f13 article EN publisher-specific-oa ECS Journal of Solid State Science and Technology 2024-05-22

This study investigates the structural, optical, dielectric, and electromagnetic absorption properties of spinel‐structured Mg–ZnAl 2 O 4 synthesized through a sol–gel technique. The structural analysis confirmed presence various phases, including MgO, ZnO, ZnAl , MgAl with an average crystallite size approximately 88 nm. material demonstrated reflection loss −71 dB at 14.02 GHz, indicating its potential for effective microwave absorption, bandwidth 3.66 GHz thickness 5 mm. optical band gap...

10.1155/nax2/7361645 article EN cc-by Nanomaterials and Nanotechnology 2025-01-01
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