Biogenic Silver Nanoparticles for Trace Colorimetric Sensing of Enzyme Disrupter Fungicide Vinclozolin

Abstract

We report a novel, simple, efficient, and green protocol for biogenic synthesis of silver nanoparticles (AgNPs) in aqueous solution using clove (Syzygium aromaticum) extract as a reducing and protecting agent. Ultraviolet-visible (UV-Vis) spectroscopy was employed to monitor the localized surface plasmon resonance (LSPR) band of clove extract-derived AgNPs prepared under various conditions. Fourier-transform infrared (FTIR) spectroscopy analysis provided information about the surface interaction of the clove extract with the AgNPs. Ultrahigh-resolution transmission electron microscopy (UHRTEM) results confirmed the formation of spherical, uniformly distributed clove extract-capped AgNPs with sizes in the range of 2–20 nm (average size: 14.4 ± 2 nm). Powder X-ray diffractometry analysis (PXRD) illustrated the formation of pure crystalline AgNPs. These AgNPs were tested as a colorimetric sensor to detect trace amounts of vinclozolin (VIN) by UV-Vis spectroscopy for the first time. The AgNP-based sensor demonstrated very sensitive and selective colorimetric detection of VIN, in the range of 2–16 µM (R2 = 0.997). The developed sensor was green, simple, sensitive, selective, economical, and novel, and could detect trace amounts of VIN with limit of detection (LOD) = 21 nM. Importantly, the sensor was successfully employed for the determination of VIN in real water samples collected from various areas in Turkey.

Enhancement of PCL/PLA Electrospun Nanocomposite Fibers Comprising Silver Nanoparticles Encapsulated withThymus VulgarisL. Molecules for Antibacterial and Anticancer Activities

“…Then, this mixture was kept for 24 h to activate the phytochemicals in the plant. The reaction time selection was followed with regard to optimized time values found in previous research . After this period, it was filtered using filter paper to obtain the aqueous thyme extract.…”

“…The reaction time selection was followed with regard to optimized time values found in previous research. 21 After this period, it was filtered using filter paper to obtain the aqueous thyme extract. The resulting obvious filtrate was stored at a low temperature to be used for the green synthesis.…”

Green Synthesized Nanomaterial‐based Colorimetric Sensors for Detection of Environmental Toxicants

“…The nanoparticles were of spherical shaped as determined with powder XRD.These nanoparticles were used for the colorimetric determination of Vinclozolin, a fungicide from real water samples. The color changed observed was from yellowish to dark brown with linearity range 2–16 μM and detection limit of 21 nM [110] …”

Application of Zero-Dimensional Nanomaterials in Biosensing

“…AgNPs are one of the most widely used antibacterial nanomaterials. Apart from their use as antimicrobial agents, AgNPs are also broadly used in the construction of electrical analysis platforms due to their unique functions such as enhanced electron transfer and controlled electrode microenvironment (Zheng et al, 2018;Hussain et al, 2019). Yang et al prepared vancomycin-functionalized AgNPs/3D-ZnO nanorod arrays for the detection and clearance of pathogenic bacteria.…”