Surface acoustic wave gas phase sensor using self-assembled monolayer film

T. Nomura, Atsushi Saitoh, S. Furukawa

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A surface acoustic wave (SAW) sensor for measuring environment is presented. SAW devices respond to changes in the mass on its surface with a shift in frequency, and offer many attractive features for applications as a gas and liquid phase sensor. In the most gas phase sensor, the device surface is coated with a thin selective film. In this paper a SAW delay line coated with self-assembled (SA) film has been used as environment sensor. A dual delay line was fabricated on a single lithium niobate (128° Y cut X propagating LiNbO 3) substrate and the propagation path was coated with the selective polymer film deposited by SA transfer technique. The polystyrene sulfonic acid sodium was used as a gas sensing material. Due to sorption of molecules, the electrical conductivity of the SA film changes. The effects caused to reduce the velocity of the SAW. Experimental results showed that the SAW velocity change was quite linear in proportion to the concentration of organic gases. Rapid and totally reversible responses were obtained by using a SA monolayer film.

Original languageEnglish
Title of host publicationProceedings of the IEEE Ultrasonics Symposium
PublisherIEEE
Pages525-528
Number of pages4
Volume1
Publication statusPublished - 1998
EventProceedings of the 1998 International Ultrasonics Symposium - Sendai, Miyagi, Jpn
Duration: 1998 Oct 51998 Oct 8

Other

OtherProceedings of the 1998 International Ultrasonics Symposium
CitySendai, Miyagi, Jpn
Period98/10/598/10/8

Fingerprint

Self assembled monolayers
Surface waves
Acoustic waves
Sensors
Electric delay lines
Gases
Acoustic surface wave devices
Acoustic wave velocity
Polymer films
Sorption
Polystyrenes
Lithium
Sodium
Molecules
Acids
Liquids
Substrates

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Nomura, T., Saitoh, A., & Furukawa, S. (1998). Surface acoustic wave gas phase sensor using self-assembled monolayer film. In Proceedings of the IEEE Ultrasonics Symposium (Vol. 1, pp. 525-528). IEEE.

Surface acoustic wave gas phase sensor using self-assembled monolayer film. / Nomura, T.; Saitoh, Atsushi; Furukawa, S.

Proceedings of the IEEE Ultrasonics Symposium. Vol. 1 IEEE, 1998. p. 525-528.

Research output: Chapter in Book/Report/Conference proceedingChapter

Nomura, T, Saitoh, A & Furukawa, S 1998, Surface acoustic wave gas phase sensor using self-assembled monolayer film. in Proceedings of the IEEE Ultrasonics Symposium. vol. 1, IEEE, pp. 525-528, Proceedings of the 1998 International Ultrasonics Symposium, Sendai, Miyagi, Jpn, 98/10/5.
Nomura T, Saitoh A, Furukawa S. Surface acoustic wave gas phase sensor using self-assembled monolayer film. In Proceedings of the IEEE Ultrasonics Symposium. Vol. 1. IEEE. 1998. p. 525-528
Nomura, T. ; Saitoh, Atsushi ; Furukawa, S. / Surface acoustic wave gas phase sensor using self-assembled monolayer film. Proceedings of the IEEE Ultrasonics Symposium. Vol. 1 IEEE, 1998. pp. 525-528
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