Surface acoustic wave NO2 sensors utilizing colloidal SnS quantum dot thin films

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Hui Li
  • Min Li
  • Hao Kan
  • Chong Li
  • Aojie Quan
  • Chen Fu
  • Jingting Luo
  • Xueli Liu
  • Wen Wang
  • Qiuping Wei
  • Yongqing Fu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)78-83
Journal / PublicationSurface and Coatings Technology
Volume362
Early online date28 Jan 2019
Publication statusPublished - 25 Mar 2019

Abstract

Colloidal quantum dots (CQDs) have shown their advantages in gas-sensing applications due to their extremely small particle size and facile solution based processes. In this study, a high sensitivity of surface acoustic wave (SAW) NO2 sensor was demonstrated using SnS CQDs as the sensing layer. The delay line based SAW device with a resonant frequency of 200 MHz were fabricated on ST-cut quartz substrate. The SnS CQDs with average sizes of 5.0 nm were synthesized and deposited onto SAW sensors using a spin-coating method. The fabricated SAW sensor was capable of detecting a low concentration of NO2 gas at room temperature with a good efficiency and selectivity e.g., with a 1.8 kHz decrease of center frequency of the SAW delay line when exposed to 10 ppm NO2 at room temperature.

Research Area(s)

  • Colloidal quantum dots, Gas sensor, Nitrogen oxide, Surface acoustic wave, Tin sulfide

Citation Format(s)

Surface acoustic wave NO2 sensors utilizing colloidal SnS quantum dot thin films. / Li, Hui; Li, Min; Kan, Hao; Li, Chong; Quan, Aojie; Fu, Chen; Luo, Jingting; Liu, Xueli; Wang, Wen; Yang, Zhengbao; Wei, Qiuping; Fu, Yongqing.

In: Surface and Coatings Technology, Vol. 362, 25.03.2019, p. 78-83.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review