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Sensing Materials for the Detection of Chlorine Gas in Embedded Piezoresistive Microcantilever Sensors

  • Timothy L. Porter (a1), Tim Vail (a2), Amanda Wooley (a3) and Richard Venedam (a4)

Abstract

Embedded piezoresistive microcantilever (EPM) sensors provide a small, simple and robust platform for the detection of many different types of analytes. These inexpensive sensors may be deployed in battery-powered handheld units, or interfaced to small, battery-powered radio transmitter-receivers (motes), for deployment in mesh networks of many sensors. Previously, we have demonstrated the use of EPM sensors in the detection of hydrogen fluoride gas, organophosphate nerve agents, volatile organic compounds (VOC’s), chlorinated hydrocarbons in water, and others. Here, we report on the design of EPM sensors functionalized for the detection of chlorine gas, or Cl2. We have constructed EPM sensors using composite materials consisting of a polymer or hydrogel matrix loaded with agents specific for the detection of Cl2 such as NaI. These materials were tested in both controlled laboratory conditions and in outdoor releases. Stability of the sensing materials under conditions of high temperature were also studied. Results are presented for gas exposures ranging from 1000 ppm to 20 ppm.

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References

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[1] Porter, T. L. and Delinger, W., “LabView based piezoresistive microcantilever sensor system,” Sensors and Transducers, vol. 68, pp. 568574, 2006.
[2] Porter, T. L., Eastman, M. P., Macomber, C., Delinger, W. G., and Zhine, R., “An embedded polymer piezoresistive microcantilever sensor,” Ultramicroscopy, vol. 97, pp. 365369, 2003.10.1016/S0304-3991(03)00062-7
[3] Porter, T. L., Eastman, M. P., Pace, D. L., and Bradley, M., “Polymer based materials to be used as the active element in microsensors: a scanning force microscopy study,” Scanning, vol. 22, pp. 15, 2000.10.1002/sca.4950220101
[4] Porter, T. L., Eastman, M. P., Pace, D. L., and Bradley, M., “Sensor based on piezoresistive microcantilever technology,” Sensors and Actuators, vol. A88, pp. 4751, 2001.10.1016/S0924-4247(00)00498-2
[5] Porter, T. L., Vail, T., Reed, J., and Stewart, R., “Detection of Hydrogen Fluoride Gas Using Piezoresistive Microcantilever Sensors,” Sensors and Materials, vol. 20(2), pp. 103110, 2008.
[6] Porter, T. L., Vail, T., and Venedam, R., “Detection of Organophosphate Gases and Biological Molecules using Embedded Piezoresistive Microcantilever Sensors,” Proc. Mater. Res. Soc., vol. 1086E, pp. 1086–u08, 2008.
[7] Porter, T. L., Dillingham, T. R., and Venedam, R. J., “A microcantilever sensor array for the detection and inventory of desert tortoises,” Applied Herpetology, vol. 5(3), pp. 293301, 2008.
[8] Gunter, R. L., Delinger, W., Porter, T. L., Stewart, R., and Reed, J., “Hydration level monitoring using embedded piezoresistive microcantilever sensors,” Medical Engineering and Physics, vol. 27, pp. 215220, 2005.10.1016/j.medengphy.2004.10.005
[9] Gunter, R. L., Delinger, W. G., Manygoats, K., Kooser, A., and Porter, T. L., “Viral detection using an embedded piezoresistive microcantilever sensor,” Sensors and Actuators (A), vol. A107, pp. 219224, 2003.10.1016/S0924-4247(03)00379-0
[10] Kooser, A., Gunter, R. L., Delinger, W. G., Porter, T. L., and Eastman, M. P., “Gas sensing using embedded pezoresistive microcantilever sensors,” Sensors and Actuators, vol. 99(2-3), pp. 430433, 2004.
[11] Porter, T. L., Delinger, W., and Venedam, R., “Gas Detection Using Embedded Piezoresistive Microcantilever Sensors in a Wireless Network,” Sensors and Transducers, vol. 94(7), pp. 133138, 2008.
[12] Porter, T. L., Delinger, W., Kooser, A., Manygoats, K., and Gunter, R., “Viral Detection Using an Embedded Piezoresistive Microcantilever Sensor,” Sensors and Actuators (A), vol. 107(3), pp. 219224, 2003.

Keywords

Sensing Materials for the Detection of Chlorine Gas in Embedded Piezoresistive Microcantilever Sensors

  • Timothy L. Porter (a1), Tim Vail (a2), Amanda Wooley (a3) and Richard Venedam (a4)

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