Synthesis, Characterisation, and Conductive Superparamagnetism Studies of γ-Fe₂O₃/Polyaniline-Levodopa Composites

Abstract

γ-Fe2O3/polyaniline–levodopa (γ-Fe2O3/PANI–levodopa) composites were prepared using γ-Fe2O3 and levodopa as dopants and ammonium persulfate as oxidant. The composites were characterised by Fourier transform infrared spectra and confirmed that the γ-Fe2O3 and levodopa were doped into the PANI chain. A transmission electron microscopy study revealed that the size of the γ-Fe2O3 was of the order of 10 nm, whereas the composite size was of the order of 25 nm; furthermore, it was observed that the PANI–levodopa chain was intercalated to form a core shell of γ-Fe2O3. Cyclic voltammetry and magnetisation studies showed that the γ-Fe2O3/PANI–levodopa composites had both electrochemical activity and conductive superparamagnetism, so these composites may be well suited for chemotherapy drugs.

Preparation and Characteristics of γ-Fe2O3/Polyaniline-Curcumin Composites

“…The γ-Fe2O3 nanoparticles were prepared according to published procedures [23][24][25][26][27] with some modifications. For a typical example, 5.4 g of FeCl3· 6H2O (20 mmol) and 2.8 g of FeSO4· 7H2O (10 mmol) were dissolved in 20 and 10 mL of water, respectively.…”