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The complex permittivity at 5.8 GHz of the composites of epoxy resin with multi-walled carbon nanotubes (MWCNTs) with their 20-70 nm diameters and 10-20 mum lengths at the concentration of 0.1-0.5% in weight was measured using a waveguide in order to develop the electromagnetic wave absorber (EMA) in the GHz frequency region. The EM absorbing efficiency was the highest at the MWCNT concentration of...
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