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CO2 and UV Laser-Induced Graphene Based on Polymer Transformation: Advanced Characterizations by 2D Raman Mapping
Sabina Botti1, Francesca Bonfigli1, Alessio Bruttomesso2
1ENEA C.R. Frascati, Photonics Micro- and Nano-Structures Laboratory, Physical Technologies and Security Division, Nuclear Department, Via E. Fermi 45, 00044 Frascati, Italy.
Abstract:
Since its discovery, laser-induced graphene (LIG) has attracted much interest because this technique, having all the advantages of a laser processing technology, is more convenient and cost-effective than other graphene production methods. This work offers a detailed analysis of LIG structures produced by UV and CO2 laser irradiation from polyimide performed with surface scanning Raman spectroscopy combined with microscopy techniques. Although UV LIG has a less ordered structure than that obtained by CO2 laser irradiation, our study indicates that UV LIG can be patterned with a resolution higher than that obtained with CO2 laser irradiation and a much smaller penetration depth into the substrate.
