Analysis of the heterogeneous structure of iron oxide/gold nanoparticles and their application in a nanosensor

•A heterogenous nanoparticles, IONPs-AuNPs using electrostatic- self- assembly technique is proposed.•This technique manipulates the positive (IONPs) and negative (AuNPs) surface charge.•Modification of carboxylate-IONPs-AuNPs for glucose oxidase immobilisation.•Application of immobilised glucose ox...

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