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Electro-chemical sensors, sensor arrays and circuits

United States Patent

July 8, 2014
View the Complete Patent at the US Patent & Trademark Office
An electro-chemical sensor includes a first electrode, a second electrode spaced apart from the first electrode, and a semiconductor channel in electrical contact with the first and second electrodes. The semiconductor channel includes a trapping material. The trapping material reduces an ability of the semiconductor channel to conduct a current of charge carriers by trapping at least some of the charge carriers to localized regions within the semiconductor channel. The semiconductor channel includes at least a portion configured to be exposed to an analyte to be detected, and the trapping material, when exposed to the analyte, interacts with the analyte so as to at least partially restore the ability of the semiconductor channel to conduct the current of charge carriers.
Katz; Howard E. (Owings Mill, MD), Kong; Hoyoul (Timonium, MD)
The Johns Hopkins University (Baltimore, MD)
13/ 725,630
December 21, 2012
This invention was made with Government support of Grant No. DE-FG02-07ER46465, awarded by the Department of Energy, Office of Basic Energy Sciences. The U.S. Government has certain rights in this invention.