Abstract
Silver nanoparticles (AgNPs) were synthesized via a biosynthetic method involving Zingiber montanum (Z. montanum) flower extracts. Various concentrations of silver nitrate (AgNO3) ranging from 2 to 4 mM were tested to determine the optimum concentration for AgNP production. The formation of AgNPs was visually confirmed by observing the colour of the solution, which changed from light brown to dark brown. The tests performed included UV‒Visible spectroscopy (UV‒Vis), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), zeta potential analyses, X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analyses (TGA), and cyclic voltammetry. The UV‒Vis spectrum showed absorption peaks at 445, 442, and 447 nm. The FTIR spectrum showed that the constitutive functional groups were good reducing agents. A TEM analysis of the AgNPs revealed that they were spherical. The zeta potentials of the AgNPs were − 31.6, − 30.4, and − 32.3 mV. XRD revealed the face-centred cubic (FCC) crystal structure for the AgNPs. EDS showed that the elemental composition of the AgNPs peaked at 3 keV, with the weight percentages of Ag of 16.62, 54.46, and 17.15% at 2, 3, and 4 mM, respectively. TGA showed good thermal stability upon heating, with final weights of 49.03, 51.18, and 63.05%. In addition, compared with that of the unmodified electrode, the conductivity of the modified electrode was higher at 100 mV. Moreover, the modified electrodes showed results proportional to the scan rates of 50, 100, 200, and 400 mV/s.
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The datasets generated during and/or analysed during the current study are not publicly available but are available from the corresponding author upon reasonable request.
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Funding
This work was supported by the Department of Material and Textile Technology, Faculty of Science and Technology, Thammasat University. This work was funded by the Chulabhorn International College of Medicine Research Fund for giving the “General Research Fund Innovation and invention development category of the year 2019” (F1/2562). This work was supported by the Thailand Science Research and Innovation Fundamental Fund fiscal year 2023 (TUFF 27/2566).
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All the authors contributed to the study’s conception and design. Conception and design, or analysis and interpretation of the data were by CP and SN. All the authors drafted the article or revised it critically with important intellectual content. Approval of the final version was obtained from CP, ST, and SN.
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Pechyen, C., Paenmao, P., Insit, M. et al. Green biosynthesis of silver nanoparticles from aqueous Zingiber montanum flower extract for enhanced application in medical diagnostic biosensors. J Mater Sci: Mater Electron 35, 507 (2024). https://doi.org/10.1007/s10854-024-12147-w
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DOI: https://doi.org/10.1007/s10854-024-12147-w