Surface Plasmon Resonance (SPR) Phenomenon of the Oxidizing and Reducing Polypyrrole
Abstract: Surface Plasmon
Resonance (SPR) phenomenon of the oxidizing and reducing polypyrrole (PPy) have
been observed using a modified Au/PPy Kretschmann configuration. The
observation was carried out through simulation Winspall 3.02 software and
compared with some experimental data refractive index (n), absorbance index (), and thickness (τ) reported in other literatures with spectroscopy
ellipsometry. This simulation assumed that the SPR system use BK-7 halfcylinder
prism (n= 1,515) and the laser beam was generated by HeNe (λ= 632,8 nm). The result showed that the optimum layer thickness
of polypyrrole with neutral electrolyte solution in the reduction state is of
about 20 nm. The polypyrrole with an acid solution in the oxidation state
showed that the reflectivity curve is sharper and the width of the curve
is smaller than the neutral electrolyte solution in the reduction state with
the SPR angle of about 46,810 and the reflectivity value of about 0,217.
Polypyrrole in a state of oxidation and reduction, related to the absorption,
film thickness, and dielectric constant of materials, affected to the SPR angle
shift and dip curve
Penulis: Nurlaila Rajabiah
Kode Jurnal: jptmesindd160650
