In recent years many researchers have focused on

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Composite materials; Reduced Graphene Oxide; Fe3O4; Electrical properties
1. Introduction
Recently, graphene has attracted great interest in the development of advanced nanomaterials due to its excellent mechanical, electrical, 'tsa thermal, and optical properties. Graphene has seen applications in the fabrication of electrochemical sensors, capacitors and biosensors [1], [2] and [3] due to gene therapy exceptional features.