標題: Synthesis and shielding properties of PVP-stabilized-AgNPs-based graphene nanohybrid in the Ku band
作者: Bansala, Taruna
Mukhopadhyay, Samrat
Joshi, Mangala
Doong, Ruey-an
Chaudhary, Manchal
環境工程研究所
Institute of Environmental Engineering
關鍵字: Graphene;Metal nanoparticles;Surface-enhanced Raman scattering and electromagnetic wave Absorption properties
公開日期: Nov-2016
摘要: PVP-stabilized silver nanoparticles (AgNP)-based graphene nanohybrid (Ag-PVP-CRG) have been synthesized and high performance shields for electromagnetic interference (EMI) in the microwave region have been developed. Morphological characterization of Ag-PVP-CRG nanohybrid by scanning electron microscopy, X-ray diffraction and high resolution transmission electron microscopy revealed PVP-stabilized AgNPs (diameter: 15-30 nm) decorated graphene sheets. The Ag-PVP-CRG nanohybrid showed excellent shielding response in the Ku band frequency region, which is majorly governed by absorption losses. The results show that the total EMI shielding effectiveness (SE) value is 58 dB for Ag-PVP-CRG at 2.0 mm thickness in the Ku-band region, dominated by absorption mechanism, which overpowered the 10 dB value of graphene oxide. The presence of AgNPs on graphene sheets enhances space charge polarization, multiple scattering and effective anisotropy energies of the nanohybrid, resulting in high electromagnetic shielding effectiveness. The dielectric behavior was evaluated to correlate with the EMI shielding mechanism. (C) 2016 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.synthmet.2016.07.034
http://hdl.handle.net/11536/132859
ISSN: 0379-6779
DOI: 10.1016/j.synthmet.2016.07.034
期刊: SYNTHETIC METALS
Volume: 221
起始頁: 86
結束頁: 94
Appears in Collections:Articles