Author/Authors :
Qayyum, Somia Department of Chemistry - Mirpur University of Science and Technology (MUST), Mirpur, AJ&K-10250, PAKISTAN , Mehmood, Mazhar Department of Metallurgy and Materials Engineering - Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, PAKISTAN , Mirza, Muhammad A Department of Chemistry - Mirpur University of Science and Technology (MUST), Mirpur, PAKISTAN , Ashraf, Sumaira Department of Metallurgy and Materials Engineering - Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, PAKISTAN , Ahmed, Zahoor Department of Chemistry - Mirpur University of Science and Technology (MUST), Mirpur, AJ&K-10250, PAKISTAN , Tanvir, Tauseef Department of Metallurgy and Materials Engineering - Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, PAKISTAN , Choudhary, Muhammad A Department of Chemistry - Mirpur University of Science and Technology (MUST), Mirpur, PAKISTAN , Iqbal, Massod Department of Chemistry - Mirpur University of Science and Technology (MUST), Mirpur, PAKISTAN , Nisar, Faria Department of Chemistry - Mirpur University of Science and Technology (MUST), Mirpur, PAKISTAN , Nisa, Zaib un Department of Chemistry - Mirpur University of Science and Technology (MUST), Mirpur, PAKISTAN
Abstract :
This study was designed to probe the fabrication of unique silver and gold nano-structures engaging a self-designed chitosan-porous anodic alumina nano-composite as template. Porous anodic alumina have been manufactured by di-step aluminum anodization in oxalic acid electrolytic bath. The surface properties of porous anodic alumina were reinforced by chitosan neutralized in sodium hydroxide. Multifarious nano-morphologies of silver as well as gold nano-structures were observed. Furthermore, the long chitosan biopolymer chains were degraded by γ-irradiations and the same procedure was employed for modification of porous anodic alumina with γ-degraded chitosan. The morphologies of fabricated silver and gold nano-structures were investigated by scanning electron microscopy, while their composition was evaluated with the help of energy dispersive X-ray spectroscopy. X-ray diffraction study exposed face centered cubic phase for both silver and gold nano-structures. Reflection mode UV-Vis spectroscopy was used to ascertain reflection grooves in the absorption range of silver and gold nano-structures respectively. The technique does not involve any harmful reagent and show different selectivity than methods in general practice. The achieved results apprised that the fabricated nano-structures offer the advantages of biocompatibility and eco-friendliness for numerous biomedical uses.
Keywords :
Gold and silver nano-structures , Nano-composite , Chitosan , Di-step aluminum anodization , Porous anodic alumina
