Akrajas Ali Umar*, Mohd Yusri Abd Rahman*, Rika Taslim, Muhamad Mat Salleh and Munetaka Oyama
* Corresponding authors: Akrajas Ali Umar akrajas@ukm.my - Mohd Yusri Abd Rahman Yusri@uniten.edu.my
Nanoscale Research Letters 2011, 6:564 doi:10.1186/1556-276X-6-564