ABSTRACT
Nanowires, known as one-dimensional nanostructures with high aspect ratio and versatile properties, have exhibited salient characteristics in flexible and stretchable sensors, owing to the extraordinary mechanical and optoelectronic properties in tensile strength and flexibility, electric conductivity, charger carrier mobility, and capacity. As one type of attractive nanowire structure, carbon nanofiber-based networks, have exhibited excellent merits in integrating performance with abundant functionalities. Additionally, well-aligned electrospun carbon nanofibers (WA-ECNFs) are very noteworthy materials, in virtue of favorable charge transportation from the aligned arrangement and interconnected network. Transition metal oxides wired on those conductive carbon nanofibers render multiple valence states as electrocatalysts, which may offer more reactive sites with larger surface area to facilitate electro-catalyzed sensing of small biomolecules. This chapter describes the sensors and insights into the defect engineering in the surface chemistry of Co3O4 and/or MnO2 wired on WA-ECNFs by tuning the morphology and geometric structures in the fabrication process. The physicochemical properties of the hybrid materials as a wire-based flexible sensor play critical roles in the performance of electrochemical detection of two biomolecular targets.
