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Open AccessArticle

Inexpensive Graphene Oxide Heaters Lithographed by Laser

Pervasive Electronics Advanced Research Laboratory, University of Granada, 18071 Granada, Spain
Department of Electronics and Computer Technology, University of Granada, 18071 Granada, Spain
Department of Analytical Chemistry, University of Granada, 18071 Granada, Spain
Biochemistry and Electronics as Sensing Technologies Group, University of Granada, 18071 Granada, Spain
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(9), 1184;
Received: 23 July 2019 / Revised: 14 August 2019 / Accepted: 18 August 2019 / Published: 21 August 2019
(This article belongs to the Special Issue Laser Induced Nanomaterials)
In this paper, we present a simple and inexpensive method for the fabrication of high-performance graphene-based heaters on different large-scale substrates through the laser photothermal reduction of graphene oxide (laser-reduced graphene-oxide, LrGO). This method allows an efficient and localized high level of reduction and therefore a good electrical conductivity of the treated films. The performance of the heaters is studied in terms of steady-state temperature, power consumption, and time response for different substrates and sizes. The results show that the LrGO heaters can achieve stable steady-state temperatures higher than 200 °C when a voltage of 15 V is applied, featuring a time constant of around 4 s and a heat transfer coefficient of ~200 °C cm2/W. These characteristics are compared with other technologies in this field, demonstrating that the fabrication approach described in this work is competitive and promising to fabricate large-scale flexible heaters with a very fast response and high steady-state temperatures in a cost-effective way. This technology can be easily combined with other fabrication methods, such as screen printing or spray-deposition, for the manufacturing of complete sensing systems where the temperature control is required to adjust functionalities or to tune sensitivity or selectivity. View Full-Text
Keywords: flexible electronics; graphene oxide; heater; laser-scribing; thermal response flexible electronics; graphene oxide; heater; laser-scribing; thermal response
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Romero, F.J.; Rivadeneyra, A.; Ortiz-Gomez, I.; Salinas, A.; Godoy, A.; Morales, D.P.; Rodriguez, N. Inexpensive Graphene Oxide Heaters Lithographed by Laser. Nanomaterials 2019, 9, 1184.

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