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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hakeem, N. A. Abd El-Kader, F. H. Elashmawi, I. S. Menazea, A. A. |
| Description | Country affiliation: Egypt Author Affiliation: Abd El-Kader FH ( Physics Department, Faculty of Science, Cairo University, Giza, Egypt.); Hakeem NA ( Spectroscopy Department, Physics Division, National Research Centre, Giza, Egypt.); Elashmawi IS ( Spectroscopy Department, Physics Division, National Research Centre, Giza, Egypt); Menazea AA ( Spectroscopy Department, Physics Division, National Research Centre, Giza, Egypt.) |
| Abstract | Nanocomposites of Poly (n-vinylcarbazole) PVK/Ag nanoparticles were prepared by laser ablation of a silver plate in aqueous solution of chlorobenzene. The influences of laser parameters such as; time of irradiation, source power and wavelength (photon energy) on structural, morphological and optical properties have been investigated using X-ray diffraction (XRD), Transmission electron microscopy (TEM), Ultraviolet-visible (UV-Vis) and Photoluminescence (PL). A correlation between the investigated properties has been discussed. XRD, TEM and PL indicated that the complexation between AgNPs and PVK in the composite system is possible. Only the reflection peak at 2θ=38° of AgNPs appeared in the composite nanoparticles while the other reflection peaks were destroyed. The nanoparticles shape and size distribution were evaluated from TEM images. TEM analysis revealed a lower average particle size at long laser irradiation time 40min and short laser wavelength 532nm together with high laser power 570mW. From UV-Visible spectra the values of absorption coefficient, absorption edge and energy tail were calculated. The reduction of band tail value with increasing the laser ablation parameters confirms the decrease of the disorder in such composite system. The PL and UV-Vis. spectra confirm that nanocomposite samples showed quantum confinement effect. |
| ISSN | 13861425 |
| Volume Number | 138 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-03-05 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Metal Nanoparticles Chemistry Nanocomposites Chlorobenzenes Electrons Lasers Luminescence Microscopy, Electron, Transmission Nanotechnology Optics And Photonics Particle Size Photochemistry Polyvinyls Silver Spectrophotometry, Ultraviolet X-ray Diffraction Journal Article Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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