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Multiple uses for morphologically unique plant-derived CNF are being envisaged [40–44]. Sharon’s group [28, 45] has shown that these carbon structures have great impact as a radiation absorber. In the present-day scenario of the advancement of wireless communications and microwave communication technology in telecommunication there is a demand to allow the coexistence of various systems and instruments without harmful electromagnetic interferences. Studies have shown that the materials with specific morphology of the plant-derived CNFs will act as microwave absorbing and shielding materials in GHz frequency range, due to their many unique properties. Oil of Linum usitatissimum synthesized by CVD method has yielded CNF (Figure 2.10), which has shown an absorption efficiency in the range of ~85–93% and absorption bandwidth of 2.8 GHz in the frequency range of 8–10.8 GHz. This suggests that CNF from L. usitatissimum seed oil would be very promising for applications as thinner and lighter absorber as well as SE material in X-band of microwave [46].

Figure 2.10 CNF synthesized from oil of Linum usitatissimum by CVD method.