1. Department
of Chemistry, Indian Institute of Technology Guwahati, Kamrup, Guwahati, Assam 781039, India
2. Biomaterial
and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781035, India
3. Department
of Chemistry, N N Saikia College, Titabar, Jorhat, Assam 785630, India