1. Scientific Equipment Center, Faculty of Science and Technology, Suan Dusit Rajabhat University, Bangkok 10300, Thailand
2. Institute of Advanced Photonics Science, Nanotech Research Alliance, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
3. Nanoscale Science and Engineering Research Alliance (N'SERA), Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand