Immobilization of Tetrabutyl Thiuram Disulfide in Chitosan Thin Film for Sensing Zinc Ion Using Surface Plasmon Resonance Spectroscopy

Abstract

Tetrabutyl thiuram disulfide (TBTDS) immobilized in chitosan thin film has been studied as a sensor element for zinc ion, Zn 2+ , using surface plasmon resonance (SPR). The TBTDS-immobilized chitosan thin film, which acts as an active layer, was coated on a gold film by spin coating. Zn 2+ can be detected by measuring the SPR signal when TBTDS-immobilized chitosan thin film contacts with Zn 2+ in solution. The sensor produced a linear response for Zn 2+ ranging from 0.1 to 1 ppm with a sensitivity of 0.0317° ppm −1 . Using immobilized TBTDS as an active layer, the Zn 2+ can also be selectively detected when present in mixtures of heavy metal ions.

Optical Studies of Graphene Oxide/Poly(amidoamine) Dendrimer Composite Thin Film and Its Potential for Sensing Hg2+ Using Surface Plasmon Resonance Spectroscopy

“…(20,21,23) Previous research studies mainly focused on modifying gold films, which are required for the SPR phenomenon, to increase the sensitivity of the SPR sensor. (25)(26)(27)(28) However, to the best of our knowledge, SPR is yet to be applied with gold-GO/PAMAM composite thin films for heavy metal ion detection.…”