Executive Summary : | Increased use of electronic gadgets and communication devices catapulted the electromagnetic pollution leading to signal loss, distortion and crosstalks. Therefore, it is necessary that all electronic equipments or systems must be protected from electromagnetic interferences. The equipment or system design need to meet the EMI shield compatibility levels specified in the National / International Standards. Thus testing, evaluation and calibration of the composites for EMI shielding to sustain the reliability of the devices in EM environment. Polymer-matrix composites containing conductive fillers are attractive structures for various applications due to the low density and greater surface area provided by the filler. Various covalent modification of graphene using surfactants like 3-aminopropyltriethoxysilane (APTS), N,N-dicyclohexyl carbodiimide, polyetheramine and non-covalent modification of graphene with surfactants like polyvinylpyrrolidone, Polyvinyl alcohol, Triton X-100, pluronic yields greater exfoliation, thereby yielding more surface area for reduction of graphene and further development of graphene quantum dots. Graphene Quantum Dots coupled with metal ferrite will be a good material in EMI shielding applications which couples the properties of GQD like tuning the non zero band gap and also the high hysteresis of metal ferrites thus can be employed in a wide band gap electromagnetic wave attenuation. Better anchorage of ferrites on the surface of GQD can be ensured with various surfactants. Graphene quantum dots (GQDs) is a single-layer of graphene with an approximate size of 30 nm. Due to versatile nature of GQDs like microwave absorption, low toxicity, stable photoluminescence, chemical stability and pronounced quantum confinement effect, these are potential material for EMI shielding as well as RADAR absorption applications. |