Estudio de la deformación a flexión de un prototipo de sensor obtenido a partir de grafeno inducido por láser.

Abstract

This study investigates the effect of power, focal length and number of engravings on graphene sensors fabricated using a 450 nm diode laser at the upper limit of the UV spectrum. The laser was irradiated over polyimide and the resulting sensors were subjected to deformation by bending at three points. The geometry that best met the requirements was selected to obtain the graphene sensors. These sensors were morphologically characterized by scanning electron microscopy. The material properties were evaluated by Raman spectroscopy and the samples were electrically characterized using the Van der Pauw method. The results showed that it was possible to obtain lowcost graphene whose properties varied according to the variables studied. It was concluded that the power of the laser was critical in the fabrication of graphene vending sensors. It was also highlighted that the focal length had a negligible effect on the laser production of graphene, while increasing the number of etchings reduced the quality of the material and the caliber factor of the sensor. This study shows that it is possible to obtain low-cost graphene by irradiating a commercial laser.