US 12,584,878 B2 · Carbon nanotube electrochemical set as lab-on-a-chip

Abstract

The present disclosure concerns open-end carbon nanotubes assembled as a microelectrode array in electrode sets/micro-electrode sets (ES/micro-ES). The ES/micro-ES includes three electrodes that are made of highly densified multi-walled carbon nanotubes fibers (HD-CNTfs) sectioned into rods embedded in an inert polymer film with exposed open ends of CNTs at the electrode-electrolyte interface. The ES/micro-ES provide miniature electrochemical sensing devices in which all electrodes are based on carbon nanomaterials. The combination of dimensions and orientation provides for highly sensitive electrochemical determination (picomolar) of different electroactive analytes in different electrolyte mediums, where even a single drop of desired analyte solution will be enough for electrochemical characterization.

Claims20

Dependent claims

A micro electrode set (μ-ES) comprising:

a working electrode (WE),
a counter electrode (CE),
a reference electrode (RE), and
an insulating substrate in a plate shape having a first side, a second side, and a thickness, wherein:
the WE, CE, and RE each comprise a carbon nanotube fiber (CNTf) of a cylindrical length, an open circular distal end, and a closed circular proximal end;
and
the WE, CE, RE are arranged in parallel along a thickness direction of the insulating substrate, and are embedded in the insulating substrate with the open circular distal ends exposed at the first side of the insulating substrate, and the closed circular proximal ends sealed at the second side of the insulating substrate such that a solution in contact with the μ-ES does not substantially contact the cylindrical length and the closed circular distal ends of the CNTfs.

4 more elements

Dependencies are inferred from the claim text.

Carbon nanotube electrochemical set as lab-on-a-chip

Life of this patent

Carbon nanotube electrochemical set as lab-on-a-chip

Life of this patent

Abstract

Claims20