Flexible and robust laser-induced graphene heaters photothermally scribed on bare polyimide substrates

Bobinger, Marco; Romero Maldonado, Francisco Javier; Salinas Castillo, Alfonso; Becherer, Markus; Lugli, Paolo; Morales Santos, Diego Pedro; Rodríguez Santiago, Noel; Rivadeneyra Torres, Almudena

doi:https://doi.org/10.1016/j.carbon.2018.12.010

Bob2018_graphite_film_heater_R1_nr.pdf (3.305Mb)

Identificadores

URI: http://hdl.handle.net/10481/71980

DOI: https://doi.org/10.1016/j.carbon.2018.12.010

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Materia

CNC laser

Flexible

Graphene film heater

Laser-induced graphene

Laser ablation

Micro-hotplate

Polyimide

Date

2018-12-02

Abstract

We demonstrate the feasibility of fabricating cost-effective and robust laser-induced graphene (LIG) flexible heaters with an innovative technique based on the photothermal production of graphene with a foam-like morphology. The produced devices are precisely defined on a bare polyimide substrate without the need of photomasks by employing a computer numerical control (CNC) driven laser diode. The electrical properties of the LIG-based heaters can be tailored by adjusting the laser power. The resulting conductive material exhibits electrical and chemical properties which are similar to the ones for graphene such as a negative temperature coefficient of −0.46 m°C−1 and a maximum operating temperature of around 400 °C. The developed heaters can outperform the existing emerging technologies showing a very rapid and stable response up to 225 °C with the extra features of flexibility, biocompatibility, and environmental friendliness.