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Sensors 2018, 18(4), 1234; doi:10.3390/s18041234

A Novel Nanowire Assembly Process for the Fabrication of CO Sensor

State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China
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Received: 23 March 2018 / Revised: 12 April 2018 / Accepted: 13 April 2018 / Published: 17 April 2018
(This article belongs to the Special Issue Novel Sensors Based on Metal Oxide Films and Structures)
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Abstract

Nanowires have been widely studied due to their outstanding mechanical and electrical properties; however, their practical applications are limited to the lack of an effective technique for controlled assembly. In the present work, zinc oxide (ZnO) nanowire arrays were assembled via a combing process using a makeup brush and the nanodevice was fabricated. The current–voltage (I–V) and ultraviolet (UV) characteristics of the device indicate stable and repeatable electrical properties. The carbon monoxide (CO) sensing properties were tested at operating temperatures of 200, 300 and 400 °C. It was found that ZnO based sensor exhibited the highest sensitivity to CO at 300 °C due to the change of dominant oxygen species. Comparing with others result, the sensitivity of the fabricated sensor exhibits higher sensing performance. The sensing mechanism of the CO sensor is also discussed. View Full-Text
Keywords: nanowire assembly; combing process; ZnO; CO sensor nanowire assembly; combing process; ZnO; CO sensor
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Cheng, B.; Yang, S.; Liu, T.; Vazinishayan, A. A Novel Nanowire Assembly Process for the Fabrication of CO Sensor. Sensors 2018, 18, 1234.

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