Department of Physics
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Item Plasmon Assisted Quantum Cutting in Rare Earth Doped Glasses(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2023) Ahmad Wadood; CIIT/SP22-RPH-016/LHR; Dr. Junaid Amjad; LHR TP 8780Borophosphate based glass materials having rare earth, shows promising optical photonic and biomedical applications. Here in the current report, Ce3+ ions and AgCl are co-doped in Borophosphate glass and new hybrid glasses with different properties were prepared by using melt-quenching method. The intensities of 4f intrabands transitions of rare earth ions changed by the addition of metallic Ag nanopartciles (NPs). Photoluminescence spectroscopy of Borophosphate glass co doped with Ce3+ ions and Ag nanoparticles revealed the dynamic decay of Ce3+ ions due to the influence of Ag plasmonic nanoparticles. The optical properties of these glasses were characterized by different methods such as UV-Vis, Raman, PL (photoluminescence), FTIR and XRD. The results show the absorption and luminescence spectroscopy and the excited state lifetime that gives the optical properties of the glass.Item Copper mediated optical properties of rare earth doped amorphous materials(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2021) RABIA KHALID; CIIT/FA19-RPH-025/LHR; Dr. Junaid Amjad; LHR TP 7274Borophosphate based glass materials having rare earth, shows promising optical photonic and biomedical applications. Here in the current report, Dy3+ ions and CuO is co-doped in Borophosphate glass and new hybrid glasses with different properties were prepared by using melt-quenching method. The intensities of 4f intrabands transitions of rare earth ions changed by the addition of metallic Cu nanopartciles (NPs). Photoluminescence spectroscopy of Borophosphate glass co-doped with Dy3+ ions and Cu nanoparticles revealed the dynamic decay of Dy3+ ions due to the influence of Cu plasmonic nanoparticles. The optical properties of these glasses were characterized by different methods as UV-Vis, Raman, PL (photoluminescence), FTIR and XRD. The results show the absorption and luminescence spectroscopy also the excited state lifetime that gives the optical properties of the glass.Item Synthesis of Co0.7Ni0.3Fe2O4/GO Composite Through Hydrothermal Method and Insight into the Physical Properties(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2025) Anam Munir; CIIT/FA23-RPH-005/LHR; Dr. Mukhtar Ahmad; LHR TP 9840Hydrothermal method was used for the preparation of Cobalt-Nickel Ferrites/Graphene Oxide (Co0.7Ni0.3Fe2O4/GO) to study the physical properties. The goal of adding GO to the ferrite matrix was to improve the composite's optical, morphological, and structural properties. X-ray diffraction, Scanning Electron microscopy, UV-VIS Spectroscopy and RAMAN Spectroscopy was used to characterize the samples. A single-phase spinal structure was confirmed by XRD diffraction and lattice parameter was reduced from 8.40 Å to 8.25 Å.SEM micrographs showed nanoparticles are agglomerated and are non-uniform in size. The optical bandgap changed significantly increasing GO content, according to UV-Vis analysis, indicating increased optical absorption. The effective integration of the GO and ferrite phases was further confirmed by Raman spectra. These results demonstrate the promise of Co0.7Ni0.3Fe2O4/GO nanocomposites for innovative uses in water purification. However, there will be the study of the physiology fibrillation of the fluoride ions in the contaminated water with help to chemo sorption by the application of first order (PFO) and second order (PSO) model. This project’s findings also improved the experimental studies of Co0.7Ni0.3Fe2O4/GO composite