Electrochemical sensor with interdigitated microelectrodes and conductive polymer

A conductive polymer, microelectrode technology, applied in scientific instruments, electrical solid devices, instruments, etc., can solve the problems of difficult to obtain data reproducibility, high dependence, increased difficulty and cost, etc.

Inactive Publication Date: 2009-08-26
AGENCY FOR SCI TECH & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, known procedures for electropolymerization and / or detection often require large volumes of monomer and / or analyte solutions and large surface areas, which can increase difficulty and cost in developing new sensor materials
Furthermore, data reproducibility is difficult to obtain and is often highly dependent on the electrochemical cell configuration employed in different experimental setups

Method used

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  • Electrochemical sensor with interdigitated microelectrodes and conductive polymer
  • Electrochemical sensor with interdigitated microelectrodes and conductive polymer
  • Electrochemical sensor with interdigitated microelectrodes and conductive polymer

Examples

Experimental program
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Effect test

Embodiment 1

[0059]sensor manufacturing

[0060] Fabrication of electronic devices with circular geometry components for droplet based electropolymerization and sensor applications, symmetrical reference and counter electrodes for electric field uniformity, and confinement of aqueous and organic based droplets The perfluorocarbon-based hydrophobic material formed by the two. image 3 A photograph showing a device containing four independent electronic sensors, each capable of confining a sample volume of 4 microliters within a 3 mm diameter hydrophilic region. The device can be applied to the development of new conductive materials and resistivity-based sensors.

[0061] A Pyrex 7740 wafer with a diameter of 4" was used as the substrate. After cleaning in piranha solution, a 10 nm thick layer of chromium and a 500 nm thick layer of silver were deposited by electron beam evaporation. A 1 μm thick low-stress silicon nitride film deposited by chemical vapor deposition (PECVD) was used to co...

Embodiment 2

[0064] sensor test

[0065] The sensor device design has two functions: (1) Electropolymerization and material deposition from one droplet (e.g. <10 μL) of a monomer solution of a conjugated compound, including pyrrole, aniline, Thiophene, nathiophene, ethylenedioxythiophene and their derivatives, and (2) as electrochemical cells for the characterization, testing and application of materials as-deposited from one solution droplet (eg <10 μL). Devices with perfluorocarbon surface coatings can be used for both aqueous and non-aqueous droplets.

[0066] First, the cyclic voltammograms of ferrocene (in organic solution) and ferricyanide (in aqueous solution) were measured to test the system. Figure 5 nBu shown at 0.1 M 4 NPF 6 Cyclic voltammogram of a droplet (5 μL) of ferrocene solution in propylene carbonate in the presence of It is observed that at 0.2V there is a half-wave potential (E 1 / 2 ) reversible wave. The device uses an Ag wire as a reference electrode and is the...

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Abstract

The present invention generally relates to electronic devices and methods. In some cases, the invention provides a sensor device including a pair of interdigitated microelectrodes (60) coating with conductive polymer material (70). The microelectrode (60) may be enclosed by a first electrode (22), a second electrode (40) and a drainage wall (50).

Description

technical field [0001] The present invention relates to electronic devices and related methods including polymerization methods and sensing methods. Background technique [0002] Electronic devices employing organic conductive materials, including conductive polymers, such as side-chain and / or backbone-functionalized polythiophenes, have been investigated. In some cases, such devices have been used as sensors. For example, previous work involved modulating the leakage current between two sets of interdigitated electrodes by changing the oxidation state of a conducting polymer in contact with the electrodes. When exposed to a target analyte solution, an amperometric response based on the difference in resistivity is observed. [0003] Fabrication of such sensors typically involves depositing organic conductive materials onto electrodes by electropolymerization of monomeric species to form conductive polymer films. However, known procedures for electropolymerization and / or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/403
CPCH01L51/0006G01N27/403H01L51/0035H01L51/0036H10K71/125H10K85/111H10K85/113
Inventor 帕维尔·纽齐尔尤啸华应仪如
Owner AGENCY FOR SCI TECH & RES
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