Fabrication of interdigitated electrodes (IDEs) modified with sensitive layers of ZnO nanorods and nanoflowers

Abstract

The novel nano structures of the sensitive layer with interdigitated electrodes (IDEs) platforms have a significant interest in miniaturized electrochemical sensor applications. Herein, we report the design fabrication and characterization of IDEs decorated with hydrothermal growth of ZnO nanorods (NRs) and nanoflowers (NFs) active layers. The IDEs patterns designed and tested using CIRCAD software tool with the dimension of 10 mm long, 0.5 mm wide and the 0.5 mm interspace between the adjacent fingers. A four-step deposition of ZnO seed layer followed by a hydrothermal treatment lead to produce the heavily ordered ZnO NFs and NRs patterns on the screen printed IDEs. The structural and chemical compositional of the NFs and NRs were examined by using field emission scanning electron microscopy (FeSEM), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), X-ray diffractometer (XRD). The screen printed IDEs decorated with NFs and NRs can be used in the design of future electrochemical sensor applications.