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

By Marco R. Bobinger, F. J. Romero, A. Salinas-Castillo, M. Becherer, P. Lugli, D. Morales, Noel Rodríguez, A. Rivadeneyra. Carbon, 2019

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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.

Subfields: Biomedical Engineering, Civil and Structural Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/40de15567a6694ac2a1ebd735bf0a029b55713e2