Biosensor calibration structure containing different sensing surface area

Patent metadata

Field	Value
Publication number	US-11045141-B2
Application number	US-201916685579-A
Country	US
Kind code	B2
Filing date	Nov 15, 2019
Priority date	Mar 1, 2017
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A biosensor calibration structure is provided that includes at least two electrode structures in which at least one of the electrode structures has a non-random nanopattern on the sensing surface which provides a different sensing surface area than at least one other electrode structure. The at least one other electrode structure may be non-patterned (i.e., flat) or have another non-random nanopattern on the sensing surface. A biological functionalization material such as, for example, glucose oxidase or glucose dehydrogenase, can be located on at least the sensing surface of each electrode structure. The biosensor calibration structure can be used within a biosensor calibration method.

First claim

What is claimed is:

1. A biosensor calibration structure comprising:
an array of electrode structures each having a sensing surface, wherein at least one of the electrode structures of the array of electrode structures has a non-random nanopattern comprising an electrode base structure having a topography and in a first sensing surface which provides a different sensing surface area than at least one other electrode structure in the array of electrode structures, wherein the at least one other electrode structure of the array of electrode structures is an entirely non-patterned sensing surface located outside of the first sensing surface.

2. The biosensor calibration structure of claim 1 , wherein each electrode structure of the array of electrode structures comprises an electrically conductive material.

3. The biosensor calibration structure of claim 1 , wherein the electrode base structure and the topography are of uniform construction and comprise a same electrically conductive material.

4. The biosensor calibration structure of claim 1 , wherein the topography comprises rods, cones, or annular structures.

5. The biosensor calibration structure of claim 1 , further comprising a biological functionalization material located on at least the sensing surface of each electrode structure of the array of electrode structures.

6. The biosensor calibration structure of claim 5 , wherein the biological functionalization material is composed of an oligonucleotide, a nucleic acid, a peptide, a ligand, a protein, an enzyme, or any other material apt to bind with a complementary target biomolecule.

7. The biosensor calibration structure of claim 6 , wherein the biological functionalization material is composed of glucose oxidase or glucose dehydrogenase.

8. The biosensor calibration structure of claim 1 , wherein the non-random nanopattern consists of repeating feature elements having a critical feature size of less than one micron in dimension.

9. A biosensor calibration structure comprising:
an array of electrode structures each having a sensing surface, wherein at least one of the electrode structures of the array of electrode structures has a non-random nanopattern comprising an electrode base structure having a first topography and in a first sensing surface which provides a different sensing surface area than at least one other electrode structure in the array of electrode structures, wherein the at least one other electrode structure of the array of electrode structures has another non-random nanopattern comprising the electrode base structure having the first topography in a second sensing surface, and the at least one other electrode structure of the array of electrode structures has one of the following: (i) a different density than the non-random nanopattern of the at least one of the electrode structures of the array of electrode structures (ii) a different cross sectional size than the non-random nanopattern of the at least one of the electrode structures of the array of electrode structures, or (iii) a different aspect ratio than the non-random nanopattern of the at least one of the electrode structures of the array of electrode structures.

10. The biosensor calibration structure of claim 9 , further comprising a biological functionalization material located on at least the sensing surface of each electrode structure of the array of electrode structures.

Assignees

• IBM

Inventors

• Kinser Emily R

Classifications

• G01N33/5438

  Electrodes · CPC title

• A61B5/14532 Primary

  for measuring glucose, e.g. by tissue impedance measurement · CPC title

• A61B5/14865

  invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors · CPC title

• A61B2562/125

  characterised by the manufacture of electrodes · CPC title

• A61B5/6846 Primary

  specially adapted to be brought in contact with an internal body part, i.e. invasive · CPC title