Á. L. Álvarez, F. Borrás, J. S. Moreno, M. García-Vélez, C. Coya, E. Climent, C. Munuera, A. de Andrés
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The use of electrical machining for patterning and oxidation of graphene in low cost manufacturing
Graphene patterning and local oxidation of graphene are performed at high speed over large areas by means of controlled electrical micro-discharges, using a home-made instrument. The optimum operating voltage is determined to obtain high quality straight lines of removed graphene in a dry environment. By properly adjusting the working voltage and humidity conditions, large spots of graphene oxide are obtained with high uniformity, which paves the way to achieve large single-layer graphene oxide substrates for different applications.