1. Low Dimensional Materials Research Centre (LDMRC) Department of Physics, Faculty of Science University of Malaya 50603 Kuala Lumpur Malaysia
2. Mushroom Research Centre, Faculty of Science University of Malaya 50603 Kuala Lumpur Malaysia
3. Institute of Biological Sciences Faculty of Science University of Malaya 50603 Kuala Lumpur Malaysia
4. Department of Chemistry Faculty of Science University of Malaya 50603 Kuala Lumpur Malaysia
5. Department of Physical Chemistry School of Chemistry Madurai Kamaraj University, Madurai- 625021 Tamil Nadu India