Munasprianto Ramli, Imam Sujoko, Nurul Adhha, Dicky Annas, Muhamad Nikmatullah, Harits Atika Ariyanta, Dewangga Oky Bagus Apriandanu, Iwan Syahjoko Saputra, Khairurrijal Khairurrijal
This work studies a green method for synthesizing gold nanoparticles (AuNPs) using Elaeis Guineensis Jacq. (oil palm) leaf extract (EGE) using a precursor of chloroauric acid (HAuCl4). The influence of various HAuCl4 concentrations on the formation of AuNPs by the green method was investigated. Characterization methods were employed to analyze the optical properties, size, shape, structure, and SERS applicability of the AuNPs. The findings suggest that EGE contains biomolecules like flavonoids and phenols, which fulfil the roles of reducing and capping agents during the synthesis of AuNPs. The AuNPs were fabricated spectroscopically at around 525 nm and validated by UV–Vis spectrophotometer. FT-IR result presents that the stretching vibrations of the hydroxyl (O–H) molecule are indicated by the large peak absorption at 3336 cm−1, demonstrating the O–H functional groups in the derivatives of phenols. The carbonyl (C[dbnd]O) stretching vibrations, generated by the carboxylic acid in flavonoids and phenols, exhibited a robust absorption at 1602 cm−1. An optimal HAuCl4 concentration of 0.69 mM resulted in AuNPs with uniform spherical morphology and a 10–30 nm size range confirmed by TEM analysis. This concentration also led to the strongest Raman intensity, indicating the potential of these biogenic AuNPs for SERS applications. Overall, the study demonstrates a sustainable and efficient method for AuNP synthesis using a readily available plant extract, paving the way for their use in advanced sensing technologies. © 2024 The Authors
Faculty of Education and Teacher Training, Universitas Islam Negeri Syarif Hidayatullah, Banten, South Tangerang, 15412, Indonesia; Faculty of Dirasat Islamiyah, Universitas Islam Negeri Syarif Hidayatullah, Banten, South Tangerang, 15412, Indonesia; Department of Biology, Faculty of Science, Institut Teknologi Sumatera, South Lampung, 35365, Indonesia; Research Center for Chemistry, National Research and Innovation Agency (BRIN), B. J. Habibie Science and Technology Area, South Tangerang, 15314, Indonesia; Research Center for Ecology and Ethnobiology, National Research and Innovation Agency (BRIN), Jl. Raya Jakarta Bogor Km. 46, West Java, Bogor, 16911, Indonesia; Research Center for Biomass and Bioproducts, National Research and Innovation Agency (BRIN), Kawasan KST Soekarno, Jl Raya Bogor KM 46, Cibinong, Bogor, 16911, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, 16424, Indonesia; Department of Cosmetic Engineering, Faculty of Industrial Technology, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Hui, Jati Agung, Lampung Selatan, 35365, Indonesia; Pusat Halal Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Hui, Jati Agung, Lampung Selatan, 35365, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia; Department of Physics, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Hui, Jati Agung, Lampung Selatan, 35365, Indonesia; Center for Green and Sustainable Materials, Institut Teknologi Sumatera, Jl. Terusan Ryacudu, Way Hui, Jati Agung, Lampung Selatan, 35365, Indonesia; Graduate Program of Natural Resources and Environmental Management, IPB University (Bogor Agricultural University), Bogor, 16114, Indonesia
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