**Author Contributions**

Gil Nonato C. Santos is in charge of consolidation of the results and writing of the paper while Eduardo B. Tibayan and Gwen Castillon edited, synthesized and performed the antimicrobial tests. Elmer Estacio edited the paper regarding the optical characterization of the samples while Takashi Furuya, Atsushi Iwamae, and Kohji Yamamoto made the set up and performed the experiment of the samples using the FTIR and UV-VIS equipment. Masahiko Tani analyzed the UV blocking property of the samples.
