Abstract

Electromagnetic interference (EMI) shielding metamaterials have become indispensable in reducing electromagnetic (EM) wave radiation pollution. In this study, a flexible and tunable EM meta-atom was proposed and fabricated for EMI shielding metamaterials. The meta-atom was composed of a split ring resonator made with silver nanowire (AgNW) networks attached onto a biaxially pre-stretched poly(dimethylsiloxane) film. The structures and morphologies of samples prepared under different pre-stretching conditions showed that the AgNW networks on the biaxially pre-stretched samples are more stable than those on the unstretched and uniaxially pre-stretched samples. This endowed the meta-atoms with excellent electrical conductivity and reliability under various strain conditions. The tunable performance of the as-prepared materials with an AgNW area density of 600 mg/m2 was remarkable, covering as much as 90% of the entire X-band (8–12 GHz). This strategy could open new avenues toward the development of reconfigurable EMI shielding metamaterials, particularly for the wide-frequency range applications.

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