Aluminium Mesh Transparent Conductor with Irregular Structure as Effective EMI Shielding Material

Using a self-organized template made by cracking a thin film of egg white, effective irregular aluminum mesh transparent conductor (Al MTC) is obtained. The resulting Al MTCs are characterized by a sheet resistance of 12.26 Ω/sq, while the transmittance in the visible region is 83.15%. Transmission and reflection coefficients for Al MTC in the microwave range, 0.7-14 GHz, were measured using an antenna stand with horn antennas. It is shown that irregular Al MTC has an excellent combination of optical transparency, more than 83%, and shielding efficiency (SE) of more than 25 dB in the range of 0.7-14 GHz. At the same time, it is resistant to bending and compression deformations, in contrast to standard ITO coatings on flexible substrates.