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Novel synthesis and applications of FePt/CuInS2 magneto-optical core-shell nanostructures in copper ions sensing
Authors: H. Akbari, M. Sardar, M. Motaghedifard, M.B.F.O. Costa, H. Zeynali
Ref.: Sens. Atuadores B Chem. 254, 448-456 (2018)
Abstract: 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 300 K, respectively. The blocking temperature (TB) estimating by the peak in ZFC curve was about 26 K 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.
