Govindasamy Balakrishnan*, Parasuraman Kuppusami, Dillibabu Sastikumar and Jung Il Song*
* Corresponding authors: Govindasamy Balakrishnan bala_physics76@yahoo.co.uk - Jung Il Song jisong@changwon.ac.kr
Nanoscale Research Letters 2013, 8:82 doi:10.1186/1556-276X-8-82