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<p>This study presents the first comprehensive optical characterization of drop-casted <i>Zea mays</i> pigment-protein complex (PPC) films for bio-based optoelectronic applications. Absorbance spectroscopy revealed the retention of strong chlorophyll <i>a</i> and <i>b</i> peaks, essential for efficient light harvesting. Photoluminescence analysis via Voigt fitting showed asymmetric emission with an 8–10&#xa0;nm red-shifted primary chlorophyll <i>a</i> peak and a secondary far-red peak at 733–743&#xa0;nm, indicating pigment aggregation and reorganized excitonic states after low-temperature storage. Fourier-transform infrared (FTIR) spectroscopy confirmed preservation of key molecular structures and functional groups, supporting the films’ stability and integrity. Qualitative adhesion and stability tests demonstrated robust film formation with promising durability. These results demonstrate that <i>Zea mays</i> PPC films retain functional photoactivity and structural stability in solid form, advancing their potential use in sustainable bio-optoelectronic materials and devices.</p>

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Optical Characterization of Zea mays Pigment-Protein Complex Films for Sustainable Optoelectronic Biomaterials

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Leithold Alexis Ronquillo,
  • Van Kaizer Ibañez,
  • Ziron John Valaquio,
  • Aris C. Larroder,
  • Bernice Mae Yu Jeco-Espaldon,
  • Dan Michael Asequia,
  • Stephen Sabinay

摘要

This study presents the first comprehensive optical characterization of drop-casted Zea mays pigment-protein complex (PPC) films for bio-based optoelectronic applications. Absorbance spectroscopy revealed the retention of strong chlorophyll a and b peaks, essential for efficient light harvesting. Photoluminescence analysis via Voigt fitting showed asymmetric emission with an 8–10 nm red-shifted primary chlorophyll a peak and a secondary far-red peak at 733–743 nm, indicating pigment aggregation and reorganized excitonic states after low-temperature storage. Fourier-transform infrared (FTIR) spectroscopy confirmed preservation of key molecular structures and functional groups, supporting the films’ stability and integrity. Qualitative adhesion and stability tests demonstrated robust film formation with promising durability. These results demonstrate that Zea mays PPC films retain functional photoactivity and structural stability in solid form, advancing their potential use in sustainable bio-optoelectronic materials and devices.