Tamm plasmon-based dopamine detection by using a chitosan-polyaniline-gold nanostructure

Dopamine is a biomolecule that plays an important role in controlling brain function. The concentration of dopamine is a critical parameter in biotechnology. In the present research, a novel methodology for synthesis of a chitosan/polyaniline-gold-nanoparticle nanostructure layer by using the laser ablation technique is developed. The novel polyaniline nanostructure composite layer was coated on the surface of the photonic crystal with 28 alternating layers of SiO2 and TiO2 by an electron gun deposition machine. By implementing the reflectance set-up, a photonic crystal/chitosan/polyaniline-gold-nanoparticle was used to measure the low concentration of dopamine by the lowest concentration of dopamine set to 1 ppm. The results propose a new approach and future directions in sensor-based techniques.(c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement