Optochemical fluorescence sensor and method for measuring the concentration of at least one analyte in a sample
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United States of America Patent
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Feb 2, 1999
Grant Date -
N/A
app pub date -
Mar 14, 1996
filing date -
Mar 17, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optochemical fluorescence sensor with a biorecognitive layer for measuring the concentration of one or more analytes in a sample is provided with at least one island layer which is applied on a sensor substrate. The islands of the island layer are in the form of electrically-conductive material and have a diameter of less than 300 nm, the biorecognitive layer being directly applied on the island layer or bound via a spacer film. In addition, an analyte-specific fluorescent compound is provided which may be added to the sample or is provided in the sensor itself. The biorecognitive layer can bind the analyte to be measured directly or by means of analyte-binding molecules, the originally low quantum yield of the fluorescent compound increasing strongly in the vicinity of the island layer.
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