Eco-friendly synthesis of Bi–Cu–W nanocomposites for radiation barriers and photonic devices B.M. Chandrika, H.C. Manjunatha, Vishwalinga Prasad B., R. Munirathnam, L. Seenappa, K.N. Sridhar, A.J. Clement Lourduraj Nuclear Engineering and Technology, 2026 In this study, Bismuth Copper Tungsten (Bi–Cu–W) nanocomposite was synthesized using an eco-friendly combustion method with Aloe vera gel as a green surfactant and reducing agent. The synthesized nanocomposite was thoroughly characterized using PXRD, Morphological analysis, FTIR, UV-visible spectroscopy, and photoluminescence techniques to assess its structural, morphological, optical, and emission properties. PXRD results confirmed the formation of Bi 4 O 7 (triclinic), CuO 2 (orthorhombic), and W 5 O 14 (tetragonal) phases with an average crystallite size of 40.7 nm. Morphological analysis revealed agglomerated nanoparticles with irregular morphology, while EDS confirmed the elemental purity of Bi, Cu, W, and O. The optical bandgap was estimated to be 3.06 eV, making the material suitable for UV optoelectronic applications. FTIR spectra verified the presence of metal-oxygen vibrations associated with Bi–O, W–O, and Cu–O bonds. Radiation shielding analysis indicated that the Bi–Cu–W nanocomposite demonstrates high radiation protection efficiency (RPE), particularly at low photon energies, rivaling that of lead. Additionally, photoluminescence studies revealed a strong emission peak at 499 nm upon 272 nm excitation, with the calculated CIE coordinates placing the emission in the blue–green region. The composite’s neutron shielding parameters were also superior to conventional materials such as concrete. These results suggest that the Bi–Cu–W nanocomposite holds great potential for dual applications in radiation shielding and photonic devices.
Display and energy storage applications of copper doped nanoceria R. Munirathnam, Y.S. Vidya, H.C. Manjunatha, L. Seenappa, K.N. Sridhar, S. Manjunatha, M. Shivanna, S. Veera Rethina Murugan, B. Sadashivamurthy, Suman Kumar, K. Manjunatha, Sheng Yun Wu Inorganic Chemistry Communications, 2024
Heavy particle radioactivity of superheavy nuclei Nagaraja A Munishamappa, Rajachari Munirathnam, Holaly C S Manjunatha, Nagarajan Sowmya, Krishnachari N Sridhar, Lakshmaiah Seenappa Radiation Protection Dosimetry, 2023
Decay Times of Compound Nuclei in Heavy Ion Fusion Reactions Narayanaswamy Manjunatha, Holaly Chandrashekara Shastry Manjunatha, Nagaraj Sowmya, Krishnachari Nagarathnamma Sridhar, Thiyagarajan Ganesh, Pachipulusu Seetharamaiah Setty Damodara Gupta Journal of the Physical Society of Japan, 2023
Investigation of decay modes of superheavy nuclei H. C. Manjunatha, N. Sowmya, P. S. Damodara Gupta, K. N. Sridhar, A. M. Nagaraja, L. Seenappa, S. Alfred Cecil Raj Nuclear Science and Techniques, 2021
