1. Assistant Professor, Dept. of Materials Science, Faculty of Science, Chulalongkorn Univ., Bangkok 10330, Thailand (corresponding author).
2. Researcher, Dept. of Science Service, Ministry of Science and Technology, Bangkok 10400, Thailand.
3. Lecturer, Faculty of Industrial Technology, Thepsatri Rajabhat Univ., Lopburi 15000, Thailand.
4. Associate Professor, Dept. of Materials Science, Faculty of Science, Chulalongkorn Univ., Bangkok 10330, Thailand.