Novel Synthesis and Application of FePt/CuInS2 Magneto-Optical Core-Shell Nanostructures in Copper Ions Sensing

In this study, the FePt core, CuInS2 shell and FePt/CuInS2 core-shell nanostructures were successfully synthesized using Polyol process. Temperature and field dependence magnetization behavior of as synthesized FePt and FePt/CuInS2 showed super paramagnetic and ferromagnetic behavior at 300K, respectively. The blocking temperature (TB) estimating by the peak in ZFC curve was about 26K for FePt and this peak was absences for FePt/CuInS2 NSs, which indicates ferromagnetic regime. To design novel sensor for Cu+2 ions, a glassy carbon electrode was fabricated with FePt/CuInS2 core shell NSs and multi walled carbon nanotubes (MWCNT). Using cyclic voltammetry, the electrochemical behavior of Cu+2 ions was studied at FePt/CuInS2 core-shell/MWCNT@GCE and compared with responses on bare GCE and MWCNT@GCE. Finally, this electrode was used for construction of the calibration curve in linear range from 12.5-575.0 nmol L-1 Cu+2 with a detection limit of 0.14 nmol L-1. (C) 2017 Elsevier B.V. All rights reserved.