Antenna Sensors Prepared By Laser Direct Writing Based On Graphene Hybrid Materials

Formation of an antenna-type sensor by laser direct writing based on graphene hybrid materials for humidity and chemical sensing properties was studied. A meander line shaped dipole antenna was prepared by laser direct writing on a graphene oxide (GO)-CuO NRs hybrid film. Resonance peaks were observed at around 4.7 and 5.85 GHz showing the dependence on relative humidity (RH). The humidity increase from RH38 to RH100 caused a resonance peak shift from 5.89 to 5.85 GHz accompanying the increase of return loss from -17.76 to -34.07 GHz. A spiral antenna sensor consisting of GO-coated copper-carbon hybrid showed the resonance band shift depending on the dielectric constant of a chemical compound.