Spectroscopic and thermal properties of PVK/AgNPs
composites prepared by laser ablation
F. H. Abd El-kader(1), N. A. Hakeem(2), I. S. Elashmawi(2, 3) and A. A. Menazea (2)
1 Physics Department, Faculty of Science, Cairo University, Giza, Egypt.
2 Spectroscopy Department, Physics Division, National Research Centre, Giza, Egypt.
3 Physics Department, Faculty of Science, Taibah University, Al-Ula, Madina, Saudi Arabia.
Poly (n-vinylcarbazole) (PVK) / silver nanoparticles (AgNPs) composites were prepared by nanosecond laser ablation technique at different parameters such as: time of irradiation, source power and wavelength. The effect of laser parameters on spectroscopic and thermal properties has been investigated using Fourier Transform Infrared Analysis (FT-IR), Scanning Electron Microscopy (SEM) and Thermogravimetric Analysis (TGA), respectively. IR data indicated that there should occur a chemical interaction forming a complexation between AgNPs and PVK matrix. SEM reveals that the presence of AgNPs leads to changes in the surface morphology. Kinetic thermodynamic parameters such as activation energy, enthalpy, entropy and Gibb’s free energy are evaluated from TG data using Coat’s – Redfern model.