Soft lithography fabrication of chitosan-based bioplastic diffraction gratings extracted from crab shell wastes

Authors

  • Efren Gumayan Natural Science Department, Iloilo Science and Technology University

Abstract

Chitosan-based bioplastic diffraction gratings extracted from crab shell wastes are fabricated through a soft lithography replication process. Diffraction experiments with the chitosan grating replicas indicate the successful copying of periodic nanoscale groove structures with 600 and 1200 lines/mm. The first-order efficiency of bioplastic gratings and power efficiency is comparable to the output of elastomeric grating replicas. Distinct diffraction patterns are generated by the bioplastic replicas and are in good agreement with the grating equation for normal incidence. These results verify the viability of soft lithography for imprinting periodic nanoscale structures onto chitosan from seafood waste.

Author Biography

  • Efren Gumayan, Natural Science Department, Iloilo Science and Technology University

    Efren Gumayan is a faculty member at the Natural Science Department of Iloilo Science and Technology University in La Paz, Iloilo City. He completed his Bachelor of Science in Physics for Teachers at the Philippine Normal University in Manila through the DOST-SEI Project 8102 Scholarship program. He then pursued a Master of Arts in Education in Physics at West Visayas State University in La Paz, Iloilo City, supported by the DOST-ASTHRDP Consortium Scholarship program. He obtained his Ph.D. in Physics from Ateneo de Manila University in Quezon City in 2023 under the CHED-FDP II Scholarship program. His research interests include biopolymer applications, nanotechnology, optics, and photonics.

SPP2024 Proceedings Cover

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Published

2024-07-02

Issue

2024: Proceedings of the 42nd Samahang Pisika ng Pilipinas Physics Conference

Section

Invited Presentations

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How to Cite

[1]
“Soft lithography fabrication of chitosan-based bioplastic diffraction gratings extracted from crab shell wastes”, Proc. SPP, vol. 42, no. 1, p. SPP-2024-INV-1C-01, Jul. 2024, Accessed: Mar. 27, 2026. [Online]. Available: https://proceedings.spp-online.org/article/view/SPP-2024-INV-1C-01