Wearable Ring-Based Sensing Platform for Detecting Chemical Threats

Juliane R. Sempionatto, Rupesh K. Mishra, Aida Martín, Guangda Tang, Tatsuo Nakagawa, Xiaolong Lu, Alan S. Campbell, Kay Mengjia Lyu, Joseph Wang*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

89 Citations (Scopus)
252 Downloads (Pure)


This work describes a wireless wearable ring-based multiplexed chemical sensor platform for rapid electrochemical monitoring of explosive and nerve-agent threats in vapor and liquid phases. The ring-based sensor system consists of two parts: a set of printed electrochemical sensors and a miniaturized electronic interface, based on a battery-powered stamp-size potentiostat, for signal processing and wireless transmission of data. A wide range of electrochemical capabilities have thus been fully integrated into a 3D printed compact ring structure, toward performing fast square-wave voltammetry and chronoamperometric analyses, along with interchangeable screen-printed sensing electrodes for the rapid detection of different chemical threats. High analytical performance is demonstrated despite the remarkable miniaturization and integration of the ring system. The attractive capabilities of the wearable sensor ring system have been demonstrated for sensitive and rapid voltammetric and amperometric monitoring of nitroaromatic and peroxide explosives, respectively, along with amperometric biosensing of organophosphate (OP) nerve agents. Such ability of the miniaturized wearable sensor ring platform to simultaneously detect multiple chemical threats in both liquid and vapor phases and alert the wearer of such hazards offers considerable promise for meeting the demands of diverse defense and security scenarios.

Original languageEnglish
Pages (from-to)1531-1538
Number of pages8
JournalACS sensors
Issue number10
Publication statusPublished - 27 Oct 2017
Externally publishedYes


  • electronic board
  • explosives
  • organophosphates
  • ring
  • wearable sensor
  • wireless


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