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Title: Electromagnetic absorption properties of graphene/Fe nanocomposites

Graphical abstract: - Highlights: • Graphene/Fe nanocomposites were prepared by a facile and green method. • 10 nm Fe nanoparticles were uniformly dispersed over the surface of the graphene sheets. • The nanocomposites exhibited strong electromagnetic wave absorption properties. - Abstract: Graphene (G)/Fe nanocomposites with ferromagnetic properties at room temperature were fabricated by a facile and green method. Transmission electron microscope (TEM) and atomic force microscopy (AFM) amylases reveal that the α-Fe nanoparticles with a diameter of only about 10 nm were uniformly dispersed over the surface of the graphene sheets. Compared with other magnetic materials and the graphene, the nanocomposites exhibited significantly enhanced electromagnetic absorption properties. The maximum reflection loss to electromagnetic wave was up to −31.5 dB at a frequency of 14.2 GHz for G/Fe nanocomposites with a thickness of 2.5 mm. Importantly, the addition of the nanocomposites is only about 20 wt.% in the matrix. The enhanced mechanism is discussed and it is related to high surface areas of G/Fe nanocomposites, interfacial polarizations between graphene and iron, synergetic effect and efficient dispersity of magnetic NPs.
Authors:
 [1] ; ;  [1] ;  [2] ;  [2] ; ;  [1] ;  [3]
  1. Key Laboratory of In-Fiber Integrated Optics, Ministry Education of China, College of Science, Harbin Engineering University, Harbin 150001 (China)
  2. College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 (China)
  3. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 (China)
Publication Date:
OSTI Identifier:
22341780
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 9; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; AMYLASE; ATOMIC FORCE MICROSCOPY; DIELECTRIC PROPERTIES; GRAPHENE; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; NANOCOMPOSITES; NANOPARTICLES; POLARIZATION; SURFACE AREA; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY