1. Center for Materials Science, Islamia College University , Peshawar 25120 , Pakistan , Tel.: +92-91-9216766, Fax: +91-9216671
2. Center for Materials Science, Islamia College University , Peshawar 25120 , Pakistan
3. Polymers Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar , Peshawar 25120 , Pakistan
4. Department of Chemistry , University of Swat , Peshawar , Pakistan
5. Biomimetic Materials and Tissue Engineering Laboratory, Department of Chemical Engineering , University of South Carolina , Columbia, SC 29208 , USA