Physics of the Solid State
Volumes and Issues
The effect of line-by-line laser scanning on the properties of laser-induced graphene
Mikheev K. G. 1, Zonov R. G. 1, Syugaev A. V. 1, Bulatov D. L.1, Mikheev G. M. 1
1Udmurt Federal Research Center, Ural Branch Russian Academy of Sciences, Izhevsk, Russia
Email: k.mikheev@udman.ru, znv@udman.ru, syual@udman.ru, dlbulatov@udman.ru, mikheev@udman.ru

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Technology of polyimide (PI) film carbonization by direct laser treatment attracts much attention due to the versatility and ease of obtaining the carbon material, laser-induced graphene (LIG), used in the creation of various sensors and functional devices. In this work LIG film structures are obtained by line-by-line scanning of a cw CO2 laser beam over the surface of the PI film. The synthesized carbon film material is studied by optical and scanning electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy. It is shown that the Raman spectra of a single LIG line and a set of overlapping LIG lines significantly differ from each other. It is found that multiple laser scanning of the PI film leads to a marked decrease in the number of defects in the LIG structure as well as to a significant decrease in the specific surface resistance of the synthesized film material. The results obtained can be used in the synthesis of LIG film structures with improved characteristics. Keywords: laser-induced graphene, polyimide film, line-by-line laser scanning.
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