1. Institute of Nano Electronic Engineering Universiti Malaysia Perlis Kangar 01000 Malaysia
2. Department of Fundamental and Applied Sciences Universiti Teknologi PETRONAS Seri Iskandar 32610 Malaysia
3. Nanotechnology and Catalysis Research Center (NANOCAT) Institute for Advanced Studies, Universiti of Malaya Kuala Lumpur 50630 Malaysia
4. Faculty of Chemical Engineering Technology Universiti Malaysia Perlis, UniCITI Alam, Sungai Chuchuh Padang Besar Perlis 02100 Malaysia
5. Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral, Kampus Kejuruteraan Universiti Sains Malaysia Nibong Tebal Pulau Pinang 14300 Malaysia