Tengku Sarah Tengku Amran, Md Roslan Hashim, Nihad K Ali Al-Obaidi*, Hanani Yazid and Rohana Adnan
* Corresponding author: Nihad K Ali Al-Obaidi nihad@fke.utm.my
Nanoscale Research Letters 2013, 8:35 doi:10.1186/1556-276X-8-35