Barium ferrite decorated reduced graphene oxide nanocomposite for effective electromagnetic interference shielding. Issue 3 (1st December 2014)

• Record Type: Journal Article
• Authors: Verma, Meenakshi; Singh, Avanish Pratap; Sambyal, Pradeep; Singh, Bhanu Pratap; Dhawan, S. K.; Choudhary, Veena
• Is Part Of: Physical chemistry chemical physics. Volume 17:Issue 3(2015)
• Page Start: 1610
• Page End: 1618
• Publication Date: 2014-12-01
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c4cp04284k
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Barium ferrite decorated reduced graphene oxide nanocomposite has been synthesized for absorption dominated enhanced EMI 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 (BaFe12 O19 @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 (BaFe12 O19 ) 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 BaFe12 O19 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 BaFe12 O19 @RGO nanocomposite showed great potential as an effective candidate for a new type of microwave absorbing material.