Anantharaman, M R; Rajesh Kumar, Srivastava; Narayanan, T N; Reena Mary, A P; Anchal, Srivastava; Robert, Vajtai; Pulickel, Ajayan M(AIP Publishing, September 16, 2011)
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Abstract:
In this letter, we report flexible, non corrosive, and light weight nickel nanoparticle@multi-walled
carbon nanotube–polystyrene (Ni@MWCNT/PS) composite films as microwave absorbing
material in the frequency range of S band (2-4 GHz). Dielectric permittivity and magnetic
permeability of composites having 0.5 and 1.5 wt. % filler amount were measured using the cavity
perturbation technique. Reflection loss maxima of 33 dB (at 2.7 GHz) and 24 dB (at 2.7 GHz)
were achieved for 0.5 and 1.5 wt. % Ni@MWCNT/PS composite films of 6 and 4 mm thickness,
respectively, suggesting that low concentrations of filler provide significant electromagnetic
interference shielding