1 Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
2 Department of Analytical Science and Technology Transfer, Novugen Pharma Malaysia) Sdn. Bhd., No 3, Jalan Jururancang U1/21, Hicom Glenmarie, 40150 Shah Alam, Selangor, Malaysia.