Abstract
A kind of pollution known as electromagnetic interference (EMI), which results from ubiquitous usage of various electronic communication and military radar equipment, has been receiving increasing attention recently. However, large-area EMI shielding on transparent and/or curved surfaces, including building windows, curved glass wall, and special requirements spaces (SRSs), remains hard to achieve. In this paper, a silver nanofiber (AgNF) based flexible and transparent EMI shielding film was successfully assembled via a room-temperature roll-to-roll production method. For transparent application scenario, AgNF with 89% transmittance in visible range and 1 μm thickness shows ~20 dB shielding efficiency (EMI SE). On the other hand, total shielding (>50 dB) is obtained when the thickness of AgNF increases to 10 μm, while its transmittance in visible range remains higher than 75%. Considering the facile and scale-free production technology, this material can be readily applied in large-scale, transparent, and/or SRSs EMI shielding.
Highlights
While various modern electronic equipment in many fields are improving people’s daily life, a kind of pollution known as electromagnetic radiation or electromagnetic interference (EMI)emerged
For the protection of precision instruments and portable devices, we designed an EMI shielding demo consisting of a grounded metal salver and different cover films
EMI shielding efficiency (EMI SE) was discussed in the range of 8–12 GHz
Summary
While various modern electronic equipment in many fields are improving people’s daily life, a kind of pollution known as electromagnetic radiation or electromagnetic interference (EMI). The challenge mainly consist in the annealing process for the reduction of silver ion, or the spattering technology for directly depositing of metallic silver, which are usually performed in a confined space such as a tube furnace or a sputtering apparatus Such confined equipments will directly limit the scale of the final products.[48] Anothoer key issues to be resolved is that room-temperature junction-fusing between crossing 1D silver network during fabrication process, which can greatly enhance material conductivity. High transmittance in visible range and diameter larger than silver’s skin depth was obtained by finely adjusting other technological parameters such as spinning time, polymer concentration and needle type
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