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Sensors 2009, 9(7), 5655-5663; doi:10.3390/s90705655
Article

Real-Time Ozone Detection Based on a Microfabricated Quartz Crystal Tuning Fork Sensor

1,2, 1,2, 3, 2, 1,2, 3, †,* , 3, †,*, 3,4,*  and 1,2,*
1 Biodesign Institute, Arizona State University, Tempe, AZ, 85287-5801 USA 2 Department of Electrical Engineering, Arizona State University, Tempe, AZ, 85287-5801 USA 3 School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-5801 USA 4 Indoor Environment Department, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Current address: Georgia Institute of Technology, School of Civil and Environmental Engineering.
* Authors to whom correspondence should be addressed.
Received: 5 June 2009 / Revised: 8 July 2009 / Accepted: 14 July 2009 / Published: 15 July 2009
(This article belongs to the Special Issue Gas Sensors 2009)
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Abstract

A chemical sensor for ozone based on an array of microfabricated tuning forks is described. The tuning forks are highly sensitive and stable, with low power consumption and cost. The selective detection is based on the specific reaction of the polymer with ozone. With a mass detection limit of ~2 pg/mm2 and response time of 1 second, the sensor coated with a polymer sensing material can detect ppb-level ozone in air. The sensor is integrated into a miniaturized wearable device containing a detection circuit, filtration, battery and wireless communication chip, which is ideal for personal and microenvironmental chemical exposure monitoring.
Keywords: ozone; environmental; epidemiological; population; real-time; selective; sensitive; sensor; wearable; wireless ozone; environmental; epidemiological; population; real-time; selective; sensitive; sensor; wearable; wireless
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Wang, R.; Tsow, F.; Zhang, X.; Peng, J.-H.; Forzani, E.S.; Chen, Y.; Crittenden, J.C.; Destaillats, H.; Tao, N. Real-Time Ozone Detection Based on a Microfabricated Quartz Crystal Tuning Fork Sensor. Sensors 2009, 9, 5655-5663.

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