Detection of Lead Contamination of Water and VOC Contamination of Air Using SOI Micro-Optical Devices

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Date
2016-03-17
Authors
Saunders, J.
Dreher, Marian
Crudden, M. Cathleen
Du, J.
Loock, Hans-Peter
Xu, D.X
Densmore, A.
Ma, R.
Janz, S.
Vachon, M.
Keyword
Chemical Sensor , Environmental Monitoring , Interferometer , Refractive Index , Solid-Phase Microextraction
Abstract
Micro-photonic SOI Mach-Zehnder interferometers were coated with solid-phase micro-extraction materials derived from polydimethylsiloxane to enable sensing of volatile organic compounds of the BTEX class in air. A different coating based on functionalized mesoporous silicates is used to detect lead Pb(II) with a detection limit of <;; 100 ppb in water.
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