Electrochemical Activities of C/GNP Electrode for Ultrasensitive Immunosensors

Abstract

Graphene is well known for its electroanalytical activity due to the presence of enormous π-electrons in the structure. For this reason, it is believed that the graphene used for modification of the conventional electrodes have a great potential to become a good electrode. The drop-casting method is the most widely used approach due to simple observation in dispersion composition of the substrate and it is capable to tailor the detection limit and reproducibility of the samples. There are two main factors to ensure a good drop-casting material; the solvent used to disperse and the temperature during drying the substrate. Water has been used as vector to carry graphene in this study. Drying in an oven at 100 °C displayed a good electroanalytical activity compared to unmodified screen-printed carbon electrode. The sample with 100% graphene nanoplatlet (GnP) has been selected as an excellent candidate for producing a good analytical study and excellent current densities.