Sensor Elements for Aqueous Samples (SEAS)
Chemical sensor arrays are low cost, compact, robust and versatile alternatives to large analytical tools and hence drive the need to rapidly fabricate reusable chemical sensor arrays for simultaneous multi-analyte quantification.
This invention includes the rapid fabrication of reusable chemical sensor arrays for simultaneous multi-analyte quantification by machining a novel array of minature spherical sensor dots atop an LED. The array can be specifically tailored for any known class of a nalytes. LED's provide an inexpensive sensor light source, low power consumption, and automated, customizable fabrication procedure. LEDs have a very long lifetime (>10,000 hrs) are physically robust (solid state) and can be computer controlled f unattended operation. Novel porous chemical xerogels with recognition chemicals (luminophores sequestered within) form the dots. Additionally, this invention describes a detector array for analytes in aqueous media by growing a Galium Nitride LED array on a transparent Sapphire substrate and placing it behind the xerogel sensors (as opposed to in front of). CMOS detectors capture signals from the sensors from behind. Only the xerogel elements are exposed to the aqueous medium. Other values are:
a)Low cost compact geometry for aqueous media. b)Integrating wireless technology into the above will allow complete submergence. c)Ability to be reengineered for use with other kinds of optical sensors (although it is currently being developed f
Categories: Sensors, Instrumentation
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