[1] Research and Development Centre, Bharathiar University, Coimbatore,Tamilnadu, India
[2] Department of Physics, Government College of Engineering, Bargur,Tamilnadu,635104, India
[3] PG & Research Department of Physics, Government Arts College, Thiruvannamalai,Tamilnadu, India
[4] Department of Chemistry, College of Science and General Studies, Alfaisal University, Riyadh,11533, Saudi Arabia
[5] Department of Nano Science & Technology, Bharathiar University, Coimbatore,641 046, India