One step formation of laser reduced graphene oxide fabrication and characterization on novel flexible PET based sensitive sensor

In this paper, a novel sensor is fabricated by drop-casting graphene oxide onto the Polyethylene Terephthalate (PET) substrate with continuous laser process. Scan electron microscopy (SEM), Ultra violet spectroscopy (UV) and Raman spectroscopy techniques are used for the characterization of highly sonicated graphene oxide and laser reduced graphene oxide. In addition, resistance measurement is used to investigate the nitrogen gas sensing behavior and resistivity of the laser reduced graphene oxide based sensor. The laser reduced graphene oxide shows that the surface sensitivity increase with increasing the nitrogen gas pressure without any significant structural changes. There are two types of investigation has been done in this research. This fabrication method of gas sensor is cost effect and highly stable.