Silver Ion Polyelectrolyte Container as a Sensitive Quartz Crystal Microbalance Gas Detector

Yosuke Tsuge, Yukari Moriyama, Yuki Tokura, Seimei Shiratori

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A polyelectrolyte film containing metastable silver ions was applied as a quartz crystal microbalance (QCM) gas detector. The polyelectrolyte film was obtained by immersing a polyelectrolyte with numerous amine groups in a metal ion solution. The QCM detector with silver ions responded to a very low methylmercaptan gas concentration (20 ppb) but did not respond to ammonia, volatile amines, aromatic compounds, or alcohols. The response speed of the QCM detector increased gradually with increasing methylmercaptan concentrations. The highly sensitive and selective response is promoted by a ligand substitution reaction caused by the formation of coordinative bonds between a metastable silver ion and amine groups in the polyelectrolyte film. To the best of our knowledge, this system has the highest sensitivity among reported QCM gas detectors. Such high-sensitivity among reported QCM gas detectors. Such high-sensitivity gas detectors for volatile sulfur compounds have wide ranging applications in areas such as volcanic eruption prediction, food inspection, environmental analysis, and medical diagnostics.

Original languageEnglish
Pages (from-to)10744-10750
Number of pages7
JournalAnalytical Chemistry
Volume88
Issue number21
DOIs
Publication statusPublished - 2016 Nov 1

ASJC Scopus subject areas

  • Analytical Chemistry

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