1. Centre for Functional Materials and Nanotechnology, Institute of Science, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia
2. School of Physics and Material Studies, Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia
3. NANO-Electronic Centre, College of Engineering, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia