A rapid electrochemical sensor fabricated using silver ions and graphene oxide

Electrode surface modification is a common method for designing sensitive electrochemical sensors. However, a long time fabrication process is a key issue for their practical applications. In this work, we proposed a simple in situ electroless dipping deposition process for commercial electrode surface modification. Graphene and Ag NPs have been used as examples and stepwise fabricated on a glassy carbon electrode (GCE) surface. Each fabrication cycle only takes 1 min. Besides the fast fabrication process, the performance of the electrode can be easily adjusted by changing dipping cycle numbers. Based on the proposed procedure, a H2O2 electrochemical sensor was fabricated as an example with excellent performance. We believe the proposed approach could be extended for further nanomaterial-modified electrode design.