Electrodes having at least one sensing structure and methods for making and using the same
First Claim
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1. An electrode comprising:
- a non-conductive material;
a conductive layer disposed on the non-conductive material, the conductive layer comprising a conductive material; and
two or more sensing structures on the conductive layer, forming an array thereof, wherein a removed portion of conductive material forms a fluid barrier perimeter surrounding each of the two or more sensing structures; and
reagent comprising analyte responsive enzyme positioned within the sensing structure.
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Abstract
Embodiments of the present disclosure relate to electrochemical analyte sensor electrodes that have one or more sensing structures, each structure has a respective perimeter at least partially around it to define the structure so that each of the structures have a liquid limiting barrier around their perimeters. The liquid limiting perimeter may completely or partially encompass the perimeter of each sensing structure of the electrode. Also provided are methods for fabricating the electrodes, analyte sensors employing the subject electrodes, and methods of using the analyte sensors in analyte monitoring.
55 Citations
18 Claims
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1. An electrode comprising:
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a non-conductive material; a conductive layer disposed on the non-conductive material, the conductive layer comprising a conductive material; and two or more sensing structures on the conductive layer, forming an array thereof, wherein a removed portion of conductive material forms a fluid barrier perimeter surrounding each of the two or more sensing structures; and reagent comprising analyte responsive enzyme positioned within the sensing structure. - View Dependent Claims (2, 3, 4, 5)
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6. A method comprising:
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determining a level of an in vivo analyte over a period of time from signals generated by an analyte sensor, wherein the analyte sensor comprises; a working electrode; and a counter electrode, wherein the working electrode comprises; a non-conductive material; a conductive layer disposed on the non-conductive material, the conductive layer comprising a conductive material; and two or more sensing structures on the conductive layer, wherein a removed portion of conductive material forms a fluid barrier perimeter surrounding each of the two or more sensing structures; and a reagent comprising analyte responsive enzyme positioned within the sensing structure; and wherein the determining over a period of time provides for monitoring the level of the analyte. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method of fabricating an electrode, the method comprising:
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applying a conductive material to a surface of a second material to form a conductive layer; removing a first portion of the conductive material to define an electrode on the surface of the second material; removing a second portion of the conductive material within the electrode to form two or more sensing structure, forming an array thereof, having a removed portion of conductive material forming a fluid barrier perimeter surrounding each of the two or more sensing structures; and depositing a reagent comprising an analyte responsive enzyme within the two or more sensing structures of the electrode. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification