Line morphology investigation of laser induced graphene from polyimide for 3D printed electronics

First demonstrated in 2014, Direct Laser Writing (DLW) of polyimide (PI) to form Laser Induced Graphene (LIG) is a versatile and simple method to fabricate arbitrary patterns of graphene on PI. LIG can be used to fabricate electrical sensors, biosensors and even energy storage devices that can be integrated in 3D printed circuits and devices. Key to the performance of LIG devices is control over the morphology of the LIG formed, which is still poorly understood. Therefore, this paper will present a preliminary investigation and analysis of the morphology of single LIG lines versus scanning speed and femtosecond (fs) pulse fluence. The results presented will be an important step towards high performance LIG devices.Published versio