Green Synthesis of Silver Nanoparticles Using Pineapple Peel Extract as Bioreductant for Latent Fingerprint Visualization

Muhammad Rafif (Department of Chemistry Education, Faculty of Teacher Training and Education, Tanjungpura University, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak 78124, West Kalimantan, Indonesia)
Aldi Tobing (Department of Chemistry Education, Faculty of Teacher Training and Education, Tanjungpura University, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak 78124, West Kalimantan, Indonesia)
Tery Mardasela (Department of Chemistry Education, Faculty of Teacher Training and Education, Tanjungpura University, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak 78124, West Kalimantan, Indonesia)
Stefany Therisia (Department of Chemistry Education, Faculty of Teacher Training and Education, Tanjungpura University, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak 78124, West Kalimantan, Indonesia)
Riyan (Department of Chemistry Education, Faculty of Teacher Training and Education, Tanjungpura University, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak 78124, West Kalimantan, Indonesia)
Rosiana Pitri (Department of Chemistry Education, Faculty of Teacher Training and Education, Tanjungpura University, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak 78124, West Kalimantan, Indonesia)
Masriani Masriani (Department of Chemistry Education, Faculty of Teacher Training and Education, Tanjungpura University, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak 78124, West Kalimantan, Indonesia)

Jurnal Kimia Riset
Vol. 11 No. 1 (2026): June

This study aimed to identify the optimal conditions for synthesizing silver nanoparticles from pineapple peel (AC-AgNPs), characterize their physicochemical properties, and assess their efficacy as latent fingerprint detectors. The synthesis process involved varying the pH, extract concentration, AgNO₃ concentration, and heating duration. Characterization was conducted using UV-Vis spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, scanning electronic microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX), particle size analysis (PSA), and zeta potential analyses. Optimal conditions were established at pH 11, 0.08% extract concentration, 1 mM AgNO₃, and heating for 60 min. The synthesis of AgNPs was verified using UV–visible spectroscopy at a wavelength of 400-450 nm, as evidenced by a color change attributable to surface plasmon resonance. FTIR analysis revealed the involvement of –OH and C=O groups in the reduction and capping processes, while SEM-EDX results indicated slightly agglomerated particles with a silver content of 4.91% and an evenly dispersed particle morphology on the sample surface. PSA analysis determined an average particle size of 59.5 nm, and the Zeta Potential was -16.4 mV. The AC-AgNP powder effectively visualized latent fingerprints with clear and high-contrast ridge patterns on glass and paper surfaces without compromising the ridge structures. These findings suggest that AC-AgNPs have the potential to serve as environmentally friendly latent fingerprint detectors, in accordance with the principles of green chemistry.