1. Department of Mining, Metallurgical, and Materials Engineering, College of Engineering, University of the Philippines, Diliman, Quezon City 1101, Philippines
2. Natural Sciences Research Institute, College of Science, University of the Philippines, Diliman, Quezon City 1101, Philippines
3. Synchrotron Light Research Institute, Nakhon Ratchasima 3000, Thailand
4. Institute of Chemistry, College of Science, University of the Philippines, Diliman, Quezon City 1101, Philippines