Synthesis of Millimeter-Long Tungsten Oxide Nanowires for Flexible Molecule Sensor

Abstract

As one of the crucially important oxide 1D nanostructures, tungsten oxide (WO3) nanowire holds great promise for diverse applications range from the electrochromic to high performance of catalysis, sensors, photoelectric catalyst for water splitting, etc. However, although great efforts have been made to elongate the WO3 nanowire, the length of the as-grown nanowire is still limited at several tens of micrometers, which impedes its extensively applications in the flexible and wearable electronics. Here, we firstly realize the millimeter-level WO3 nanowire growth and demonstrate the feasibility of such ultra-long WO3 nanowire integrated with the flexible substrate for the molecule sensing application. It is found that the ultra-long WO3 nanowire constructed flexible sensor presents a superior sensing performance and mechanical robustness to the lung cancer biomarker molecules. The detail synthesis method, nanowire growth mechanism and performance of the flexible WO3 nanowire sensor will be presented at the meeting.