Abstract
Flexible photoelectronic devices are in demand right now. In this work, a new family of biopolymer-based photodetectors is described. Chitosan (CS) was utilized as a safe, biodegradable host biopolymer, and nanostructured barium tungstate (BaWO4) particles were used as the nanofiller of the biopolymer matrix to prepare flexible optical sensors. The co-precipitation process was used to produce the filler powders, which were then dried at room temperature without using any surfactants or hazardous solvents. The fabricated sensor showed high flexibility and sensitivity to UV/proton/alpha and laser irradiation. X-ray diffraction (XRD), XPS, FTIR, EDX-map analysis also confirmed the successful synthesis, related chemical binding, and elements in the nanocomposite structure. According to the TEM images, the average particle size of synthesized BaWO4 NPs was obtained at about 110 nm. A considerable luminescence emission was observed in the constructed sensor's blue/green and ultraviolet spectral regions under various excitation sources. The developed sensor was nontoxic to the cells and provided soft, thin, antibacterial activity, flexible, and comfortable contact with skin, and promising ionizing ray detection applications in flexible optical sensors.
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