Table 1.

Magnetic nanoparticles/PR nanocomposites.

PR Nanocomposites	Synthesis	Properties	References
PR/GO/Fe3O4	Fe3O4 by coprecipitation approach, GO by modified Hummer's method, PR was the coating for the structure by chemical oxidative polymerisation using KMnO4 as oxidant.	The core/shell structure improved the functional groups, increased the magnetization of the polymeric platform, and reduced the toxicity of the inorganic particles.	[4,5]
CoFe2O4/PR	Cobalt ferrite (CoFe2O4) was the first core material used for the oxidative polymerisation for PR using the oxidant FeCl3.	As the quantity of polymerised rhodanine monomers increased, the size of the nanocomposite also grew, ranging from approximately 40 nm–150 nm. The particles had a spherical shape.	[3]
NiFe2O4/PR	Nickel Ferrite (NiFe2O4) was initially prepared via a coprecipitation method and later employed in the oxidative polymerisation of rhodanine monomers using KMnO4.	Having a polygonal shape, the particles had a significant surface area to volume ratio, which is a crucial factor in biological applications, as it can contribute even at low concentrations. The size of NiFe2O4/PR was roughly 15 nm, and the distribution of particle sizes was satisfactory.	[15]
MnFe2O4/PR	The resulting Manganese ferrites (MnFe2O4) stock suspension was further used to prepare MnFe2O4/PR composites via an oxidation polymerisation process using FeCl3.	The polymer layer provided effective coverage, as evidenced by a noticeable weight loss. The presence of MnFe2O4 had an impact on the thermal stability of the composite compared to pure polymer. The particles were small and had uneven shapes, occasionally appearing spherical, indicating a relatively random particle growth pattern with an average size of around 8.5 nm.	[30]
MnFe2O4/PR	The process of oxidation polymerisation was employed to manufacture binary hybrids of MnFe2O4/PR, with FeCl3 serving as the oxidising agent.	With an average particle size of 8.3 nm and a narrow distribution, the product had an irregular morphology. The selected synthetic method permits the production of hydrophilic particles with moderate aggregation resistance, providing an accessible surface for future functionalisation	[23]