Integrated sensor based on acoustics-electricity-mechanics coupling effect for wireless passive gas detection

Licheng Zhou, Bohui Zhai, Zhixiang Hu, Mingqi Zhang, Long Li, Xiangxin Wang, Guangzu Zhang, Jingting Luo, Honglang Li, Bingbing Chen, Shenglin Jiang, Hua Yao Li, Huan Liu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Integrated sensor combines multiple sensor functions into a single unit, which has the advantages of miniaturization and better application potential. However, limited by the sensing platforms of the sensor and the selectivity of the sensitive film, there are still challenges to realize multi-component gas detection in one unit. Herein, a principle integration method is proposed to achieve the multi-component gas detection based on the acoustics-electricity-mechanics coupling effect. The electrical and mechanical properties of the Bi2S3 nanobelts materials in different atmospheres indicate the possibility of realizing the principle integration. At the same time, the surface acoustic wave (SAW) sensor as a multivariable physical transducer can sense both electrical and mechanical properties. Upon exposure to 10 ppm NO2, NH3, and their mixtures, the integrated SAW gas sensor shows a 4.5 kHz positive frequency shift (acoustoelectric effect), an 11 kHz negative frequency shift (mechanics effects), and a reduced 4 kHz negative frequency shift (acoustics-electricity-mechanics coupling effect), respectively. Moreover, we realize wireless passive detection of NO2 and NH3 based on the SAW sensor. Our work provides valuable insights that can serve as a guide to the design and fabrication of single sensors offering multi-component gas detection via different gas sensing mechanisms. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)3130-3141
Number of pages12
JournalNano Research
Volume16
Issue number2
DOIs
StatePublished - Feb 2023

Keywords

  • bismuth sulfide
  • coupling effect
  • integrated gas sensor
  • surface acoustic wave
  • wireless passive

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