Obtención y caracterización de estructuras de carbono sobre láminas de poliimida por inducción láser.

Abstract

The aim of this project was to obtain and to characterize carbon nanostructures by laser engraving patterns on polyimide sheets. This process was carried out with the use of a 3D printer in which a 450 nm wavelength laser head was adapted. This type of laser is normally used for engraving or cutting materials such as wood, cardboard, leather or polymers. This project was performed in order to establish an alternative, simple and economical method to obtain carbon-based materials. The samples obtained were characterized by Raman Spectroscopy, Scanning Electron Microscopy (SEM), Electrical Characterization by the Van der Pauw Method, and Contact Angle Measurement. In general, the samples presented sheets with disordered graphene structure and amorphous carbon, with morphology similar to that presented in materials such as graphene oxide and reduced graphene oxide. Additionally, it was determined that the material presents a hydrophobic behavior and an electrical behavior similar to semiconductors. Although the obtained samples don’t have characteristics comparable to high quality carbon nanostructures such as graphene or carbon nanotubes, they have a great potential to be used in applications such as the elaboration of electronic devices, like sensors, antennas and micro-supercapacitors.