Indoor air quality monitor based on Solidly Mounted Resonators for the detection of VOCs

Farah-Helúe  Villa-López; Marina Cole; Sanju Thomas; Julian W Gardner

doi:10.1109/ICSENS.2017.8234321

Indoor air quality monitor based on Solidly Mounted Resonators for the detection of VOCs

Farah-Helúe Villa-López, Marina Cole, Sanju Thomas, Julian W Gardner

University of Warwick

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding › peer-review

5 Citations (Scopus)

69 Downloads (Pure)

Abstract

This work describes the development of an indoor air quality monitor based on high frequency solidly mounted resonators (SMR) for the detection of volatile organic compounds (V OC). The sensor system operates in a differential mode with two SMR devices driven by Pierce oscillators. The active resonator was spray-coated with a selective polymer compound, while the second one was used as a reference. The absorption of vapor molecules into the polymer layer causes a frequency shift in the resonator. A study of suitable polymer coatings and finite element simulations on the sensor response were performed. Experimental results demonstrated that the VOC monitor is capable of detecting toluene concentrations down to 5 ppm with a high sensitivity of 60 Hz/ppm for a 180 nm PDMS polymer coated SMR resonating at 900 MHz. We believe that the system could be used as a robust, low-cost and low power microsensor for the real-time and ubiquitous monitoring of VOCs, particularly in a personal air quality monitor.

Original language	English
Title of host publication	2017 IEEE SENSORS
Publisher	IEEE
Number of pages	3
ISBN (Electronic)	9781509010127
DOIs	https://doi.org/10.1109/ICSENS.2017.8234321
Publication status	Published - Dec 2017
Event	IEEE Sensors Conference - UK, Glasgow, United Kingdom Duration: 29 Oct 2017 → 1 Nov 2017

Conference

Conference	IEEE Sensors Conference
Country/Territory	United Kingdom
City	Glasgow
Period	29/10/17 → 1/11/17

Bibliographical note

© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

Keywords

Polymers
Monitoring
Resonators
Oscillators
Polymer films
Sensitivity
Air quality

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title = "Indoor air quality monitor based on Solidly Mounted Resonators for the detection of VOCs",

abstract = "This work describes the development of an indoor air quality monitor based on high frequency solidly mounted resonators (SMR) for the detection of volatile organic compounds (V OC). The sensor system operates in a differential mode with two SMR devices driven by Pierce oscillators. The active resonator was spray-coated with a selective polymer compound, while the second one was used as a reference. The absorption of vapor molecules into the polymer layer causes a frequency shift in the resonator. A study of suitable polymer coatings and finite element simulations on the sensor response were performed. Experimental results demonstrated that the VOC monitor is capable of detecting toluene concentrations down to 5 ppm with a high sensitivity of 60 Hz/ppm for a 180 nm PDMS polymer coated SMR resonating at 900 MHz. We believe that the system could be used as a robust, low-cost and low power microsensor for the real-time and ubiquitous monitoring of VOCs, particularly in a personal air quality monitor.",

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author = "Farah-Hel{\'u}e Villa-L{\'o}pez and Marina Cole and Sanju Thomas and Gardner, {Julian W}",

note = "{\textcopyright} 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Copyright {\textcopyright} and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. ; IEEE Sensors Conference ; Conference date: 29-10-2017 Through 01-11-2017",

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AU - Villa-López, Farah-Helúe

AU - Cole, Marina

AU - Thomas, Sanju

AU - Gardner, Julian W

N1 - © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

PY - 2017/12

Y1 - 2017/12

N2 - This work describes the development of an indoor air quality monitor based on high frequency solidly mounted resonators (SMR) for the detection of volatile organic compounds (V OC). The sensor system operates in a differential mode with two SMR devices driven by Pierce oscillators. The active resonator was spray-coated with a selective polymer compound, while the second one was used as a reference. The absorption of vapor molecules into the polymer layer causes a frequency shift in the resonator. A study of suitable polymer coatings and finite element simulations on the sensor response were performed. Experimental results demonstrated that the VOC monitor is capable of detecting toluene concentrations down to 5 ppm with a high sensitivity of 60 Hz/ppm for a 180 nm PDMS polymer coated SMR resonating at 900 MHz. We believe that the system could be used as a robust, low-cost and low power microsensor for the real-time and ubiquitous monitoring of VOCs, particularly in a personal air quality monitor.

AB - This work describes the development of an indoor air quality monitor based on high frequency solidly mounted resonators (SMR) for the detection of volatile organic compounds (V OC). The sensor system operates in a differential mode with two SMR devices driven by Pierce oscillators. The active resonator was spray-coated with a selective polymer compound, while the second one was used as a reference. The absorption of vapor molecules into the polymer layer causes a frequency shift in the resonator. A study of suitable polymer coatings and finite element simulations on the sensor response were performed. Experimental results demonstrated that the VOC monitor is capable of detecting toluene concentrations down to 5 ppm with a high sensitivity of 60 Hz/ppm for a 180 nm PDMS polymer coated SMR resonating at 900 MHz. We believe that the system could be used as a robust, low-cost and low power microsensor for the real-time and ubiquitous monitoring of VOCs, particularly in a personal air quality monitor.

KW - Polymers

KW - Monitoring

KW - Resonators

KW - Oscillators

KW - Polymer films

KW - Sensitivity

KW - Air quality

U2 - 10.1109/ICSENS.2017.8234321

DO - 10.1109/ICSENS.2017.8234321

M3 - Conference proceeding

BT - 2017 IEEE SENSORS

PB - IEEE

T2 - IEEE Sensors Conference

Y2 - 29 October 2017 through 1 November 2017

ER -

Indoor air quality monitor based on Solidly Mounted Resonators for the detection of VOCs

Abstract

Conference

Bibliographical note

Keywords

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