Surface Plasmon Resonance Sensor Based on Polypyrrole–Chitosan–BaFe2O4 Nanocomposite Layer to Detect the Sugar

Abstract

The surface plasmon resonance sensor was used to detect and measure low concentrations of sugar. A polypyrrole–chitosan–BaFe2O4 nanocomposite layer was prepared to improve the surface of the gold layer for the detection of glucose, fructose, and sucrose using the surface plasmon resonance technique. The polypyrrole–chitosan–BaFe2O4 was synthesized using the electrodeposition method in different thicknesses. The functional group, crystal structure, and morphology of the layer were investigated with Fourier transform infrared spectroscopy, X-ray diffraction technique, and field emission electron microscopy. Consequently, the BaFe2O4 was scattered on the surface of the polymer, and the affinity of polypyrrole–chitosan–BaFe2O4 to bond with glucose is higher than that for the other sugars. The sensor limit was 0.005 ppm.

Angular surface plasmon resonance-based sensor with a silver nanocomposite layer for effective water pollution detection

“…The metal (silver) material has a higher sensitivity for SPR sensing, as was already indicated, but due to its weak chemical stability, it cannot be developed further. The biosensor's sensitivity has recently been enhanced using several methods, such as transforming the silver layer into silver nanoparticles embedded in the host dielectric materials 21 , 35 , 36 .…”