Authors: Zhang, N; Ma, XH; Ruan, SP; Yin, YY; Li, CN; Zhang, HF; Chen, Y

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY

Volume: 19 Issue: 11 Pages: 7083-7088 Published: NOV 2019 Language: English

Document type: Article

DOI: 10.1166/jnn.2019.16720

Abstract:

In this study, CdS nanowires (NWs)/Ag nanoparticle materials (CdS@Ag) with Schottky junction were

synthesized by a simple process. The Ag nanoparticles with a diameter of 3-10 nm were uniformly

scattered on the surface of CdS NWs with an average diameter of 30 nm. The gas sensing properties and

the effect of Ag content and relative humidity on the ethanol sensing properties of CdS NWs were

investigated in detail. When the relative humidity was below 60% RH, the sensor, especially the one

based on CdS@Ag0.1, exhibited an enhanced ethanol sensing response and selectivity compared with that of

pristine CdS NWs, which was believed that Ag catalyzed the reaction between ionized oxygen species and

ethanol. However, excessive Ag content does not mean a higher response and even decreased the response.

Also, the stability of CdS NWs and CdS@Ag NWs was also investigated, which were almost stable for four

months.

Full Text:

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