Test strip and biosensor incorporating with nanometer metal particles
First Claim
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1. A test strip, which comprises:
- an electrically insulating substrate;
a conducting film coated on one side of said insulating substrate to form an isolated and disconnected anode, and an isolated and disconnected cathode wherein said anode is disposed on the substrate, the anode being formed with, on both ends of the anode, a working electrode and an anode connector respectively; and
said cathode is disposed on the substrate, the cathode being formed with, on both ends of the cathode, a reference electrode and a cathode connector respectively;
a reaction layer wherein said layer is formed by coating the working electrode and the reference electrode with a slurry comprising a fiber, metal particles having a size in nanometer, and a bioactive substance, potassium ferricyanide as electrical mediator, a polymer and a surfactant; and
an electrically insulating layer disposed on the substrate and having an opening for receiving the sample on the reaction layer.
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Abstract
The present invention relates to a test strip and a biosensor having an increased conductivity and a slurry comprising a fiber, meal particles having a size in nanometer and a bioactive substance. The invention is characterized by incorporating metal particles having size in nanometer into the reaction layer of test strip and biosensor to increase the conductivity between the reaction layer and the electrodes so that the redox reaction can be readily completed and the measurement time can thus be shortened.
107 Citations
17 Claims
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1. A test strip, which comprises:
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an electrically insulating substrate;
a conducting film coated on one side of said insulating substrate to form an isolated and disconnected anode, and an isolated and disconnected cathode wherein said anode is disposed on the substrate, the anode being formed with, on both ends of the anode, a working electrode and an anode connector respectively; and
said cathode is disposed on the substrate, the cathode being formed with, on both ends of the cathode, a reference electrode and a cathode connector respectively;
a reaction layer wherein said layer is formed by coating the working electrode and the reference electrode with a slurry comprising a fiber, metal particles having a size in nanometer, and a bioactive substance, potassium ferricyanide as electrical mediator, a polymer and a surfactant; and
an electrically insulating layer disposed on the substrate and having an opening for receiving the sample on the reaction layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
(a) coating a conducting film on one side of an electric insulating substrate and forming isolated and disconnected an anode and a cathode;
(b) coating an electric insulating film on a part of the conducting film, wherein one end of an uncovered anode of the conducting film is at least a reference electrode and the other end an anode connector, and one end of an uncovered cathode of the conducting fit is at least a working electrode and the other end a cathode connector; and
(c) coating a region containing at least the working electrode, with a the slurry comprising a fiber, metal particles having a size in nanometer and a bioactive substance, and the reference electrode to form a reaction film so as to connect the working electrode and the reference electrode individually.
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16. A biosensor, which comprises the test strip of claim 1 and a detection device.
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17. The biosensor of claim 16, wherein the detection device is an amperometric sensor.
Specification