An Efficient Electrochemical Sensor Driven by Hierarchical Hetero-Nanostructures Consisting of RuO₂ Nanorods on WO₃ Nanofibers for Detecting Biologically Relevant Molecules

Abstract

By means of electrospinning with the thermal annealing process, we investigate a highly efficient sensing platform driven by a hierarchical hetero-nanostructure for the sensitive detection of biologically relevant molecules, consisting of single crystalline ruthenium dioxide nanorods (RuO2 NRs) directly grown on the surface of electrospun tungsten trioxide nanofibers (WO3 NFs). Electrochemical measurements reveal the enhanced electron transfer kinetics at the prepared RuO2 NRs-WO3 NFs hetero-nanostructures due to the incorporation of conductive RuO2 NRs nanostructures with a high surface area, resulting in improved relevant electrochemical sensing performances for detecting H2O2 and L-ascorbic acid with high sensitivity.

Keywords

• ruthenium dioxide
• tungsten trioxide
• nanofibers
• nanorods
• electrochemical sensors