Scalable Monolithic Suspended Carbon Nanowire Array Systems as Ultrasensitive Electrochemical Sensing Platforms

Abstract

This paper presents on the development of novel monolithic suspended carbon nanowire array systems for electrochemical sensor applications. Suspended carbon nanowires were fabricated through conventional simple photolithography and py-rolysis process. Currently a 300 nm wide, 600 nm thick, and 90 μm long carbon nanowire can be fabricated with 1μmover the substrate. The single carbon nanowire system was used as a hydrogen gas sensor to test the feasibility of the system as an electrochemical sensor platform. The simulation of the electrochemical current from a stacked nanoelectrode array demonstrated 100 times redox cycling based electrochemical signal amplification because of enhanced mass transfer.