title: Barium ferrite decorated reduced graphene oxide nanocomposite for effective electromagnetic interference shielding.
abstract: There is an increased interest in the development of high performance microwave shielding materials against electromagnetic pollution in recent years. Barium ferrite decorated reduced graphene oxide (BaFe12O19@RGO) nanocomposite was synthesized by a high energy ball milling technique and its electromagnetic properties were investigated in the frequency range of 12.4-18 GHz (Ku band). The results showed that barium ferrite (BaFe12O19) nanoparticles with an average particle size of 20-30 nm were well distributed and firmly anchored onto the surface of the reduced graphene oxide sheets. The obtained nanocomposite exhibited a saturation magnetization of 18.1 emu g(-1) at room temperature. The presence of BaFe12O19 nanoparticles in the nanocomposite enhances the space charge polarization, natural resonance, multiple scattering and the effective anisotropy energy leading to a high electromagnetic interference shielding effectiveness of 32 dB (∼99.9% attenuation) at a critical thickness of 3 mm. The results suggested that the as-prepared BaFe12O19@RGO nanocomposite showed great potential as an effective candidate for a new type of microwave absorbing material.
authors.affiliation: Centre for Polymer Science & Engineering, Indian Institute of Technology, Hauz Khas, New Delhi, 110016, India. veenach@hotmail.com.
authors.forename: Meenakshi
authors.initials: M
authors.lastname: Verma
authors.forename: Avanish Pratap
authors.initials: AP
authors.lastname: Singh
authors.forename: Pradeep
authors.initials: P
authors.lastname: Sambyal
authors.forename: Bhanu Pratap
authors.initials: BP
authors.lastname: Singh
authors.forename: S K
authors.initials: SK
authors.lastname: Dhawan
authors.forename: Veena
authors.initials: V
authors.lastname: Choudhary