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Title: Ag induced electromagnetic interference shielding of Ag-graphite/PVDF flexible nanocomposites thinfilms

We report Ag nanoparticle induced Electromagnetic Interference (EMI) shielding in a flexible composite films of Ag nanoparticles incorporated graphite/poly-vinylidene difluoride (PVDF). PVDF nanocomposite thin-films were synthesized by intercalating Ag in Graphite (GIC) followed by dispersing GIC in PVDF. The X-ray diffraction analysis and the high-resolution transmission electron microscope clearly dictate the microstructure of silver nanoparticles in graphite intercalated composite of PVDF matrix. The conductivity values of nanocomposites are increased upto 2.5 times when compared to neat PVDF having a value of 2.70 S/cm at 1 MHz. The presence of Ag broadly enhanced the dielectric constant and lowers the dielectric loss of PVDF matrix proportional to Ag content. The EMI shielding effectiveness of the composites is 29.1 dB at 12.4 GHz for the sample having 5 wt. % Ag and 10 wt. % graphite in PVDF.
Authors:
;  [1] ; ;  [2] ;  [3]
  1. Polymer Composite Laboratory, Department of Chemical Engineering, Anna University, Chennai 600 025 (India)
  2. Microwave Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036 (India)
  3. Department of Chemistry, Thiruvalluvar University, Serkkadu, Vellore 632115 (India)
Publication Date:
OSTI Identifier:
22482096
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CLATHRATES; DIELECTRIC MATERIALS; GHZ RANGE 01-100; GRAPHITE; INTERFERENCE; MHZ RANGE 01-100; MICROSTRUCTURE; NANOCOMPOSITES; NANOPARTICLES; ORGANIC FLUORINE COMPOUNDS; PERMITTIVITY; POLYVINYLS; RESOLUTION; SHIELDING; SILVER; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION