Silver Nanowires Coated Nitrocellulose Paper for High-Efficiency Electromagnetic Interference Shielding.

Area of Science:

• Materials Science
• Nanotechnology
• Electrical Engineering

Background:

• Thin, conductive coatings are essential for protecting sensitive electronics.
• Environmentally friendly polymers are increasingly sought after for device applications.

Purpose of the Study:

• To fabricate and analyze silver nanowire (AgNWs) coated nitrocellulose (NC) paper for electromagnetic interference (EMI) shielding.
• To investigate the structural and EMI shielding performance of AgNWs/NC composite materials.

Main Methods:

• Vacuum-assisted filtration was employed to create AgNWs coated NC papers.
• Filtrate volume was varied to optimize the coating.
• Structural analysis and EMI shielding effectiveness measurements were performed.

Main Results:

• A submicron thick, lightweight paper with a 2D in-planar AgNW structure on a rough NC surface was achieved.
• Exceptional electrical conductivity of 8603 S/m was observed due to a strongly interconnected AgNW network.
• Ultrahigh EMI shielding effectiveness of 69.4 dB across the X-band (8-12 GHz) was obtained with minimal AgNW coating.

Conclusions:

• AgNWs coated NC paper exhibits promising EMI shielding properties due to interconnected current loops and magnetic losses.
• The simple fabrication process makes these materials suitable for emerging electronic devices.
• This eco-friendly composite offers a viable solution for EMI shielding challenges.