METHOD FOR MANUFACTURING OF OPTICAL FILTER BASED ON GRAPHENE Russian patent published in 2020 - IPC C23C16/26 C23C16/448 B82Y30/00 

FIELD: nanotechnologies.

SUBSTANCE: invention relates to nanotechnology and specifically to use of novel materials, such as polymer-graphene-gold and polymer-graphene-silver composites, obtained using chemical vapor deposition (CVD) method. Disclosed is a method of producing an optical filter based on graphene, which is a three-layer composite comprising a layer of polymer, a layer of monolayer graphene, synthesized by chemical vapor deposition (CVD) on a copper catalyst substrate and deposited on a transparent polymer surface, and a layer of metal nanoparticles. Layer of monolayer graphene is synthesized in a mixture of gases Ar/H₂/CH₄ at atmospheric pressure and transferred onto a polymer surface using a mechanical transfer method based on a thermo-pressing process to obtain a polymer-graphene composite. Layer of metal nanoparticles is sputtered onto the obtained polymer-graphene composite by laser ablation using laser pulses. Thickness of the coating of the polymer-graphene composite by metal nanoparticles is directly proportional to the number of laser pulses and is determined by the desired optical absorption coefficient in accordance with the relationship: K=0.0001776×x+0.4944, wherein K is absorption coefficient, and x is number of laser pulses. Polymer-graphene composite coating structure is configured by metal nanoparticles with provision of electromagnetic radiation absorption due to the plasmon resonance effect.

EFFECT: obtaining an optical filter based on graphene, which enables to absorb up to 95 % of electromagnetic radiation by using the plasmon resonance effect.

5 cl, 4 dwg