1. Nano-fabrication and Functional Materials Research Group, School of Mechanical Engineering, Engineering Campus Universiti Sains Malaysia 14300 Nibong Tebal, Pulau Pinang Malaysia
2. Engineering Section Universiti Kuala Lumpur Malaysian Spanish Institute, Kulim Hi-Tech Park 09000 Kulim Kedah Malaysia.
3. Department of Mechanical Engineering The University of Western Australia Perth WA 6009 Australia