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- Title
Laser-Induced Graphene Formation on Polyimide Using UV to Mid-Infrared Laser Radiation.
- Authors
Fiodorov, Vitalij; Trusovas, Romualdas; Mockus, Zenius; Ratautas, Karolis; Račiukaitis, Gediminas
- Abstract
Our study presents laser-assisted methods to produce conductive graphene layers on the polymer surface. Specimens were treated using two different lasers at ambient and nitrogen atmospheres. A solid-state picosecond laser generating 355 nm, 532 nm, or 1064 nm wavelengths and a CO2 laser generating mid-infrared 10.6 µm wavelength radiation operating in a pulsed regime were used in experiments. Sheet resistance measurements and microscopic analysis of treated sample surfaces were made. The chemical structure of laser-treated surfaces was investigated using Raman spectroscopy, and it showed the formation of high-quality few-layer graphene structures on the PI surface. The intensity ratios I(2D)/I(G) and I(D)/I(G) of samples treated with 1064 nm wavelength in nitrogen atmosphere were 0.81 and 0.46, respectively. After laser treatment, a conductive laser-induced graphene layer with a sheet resistance as low as 5 Ω was formed. Further, copper layers with a thickness of 3–10 µm were deposited on laser-formed graphene using a galvanic plating. The techniques of forming a conductive graphene layer on a polymer surface have a great perspective in many fields, especially in advanced electronic applications to fabricate copper tracks on 3D materials.
- Subjects
MID-infrared lasers; ULTRAVIOLET lasers; LASER beams; GRAPHENE; MICROSCOPY; NITROGEN plasmas
- Publication
Polymers (20734360), 2023, Vol 15, Issue 21, p4229
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym15214229