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Flexible electrode array and preparation method and application thereof

A flexible electrode and array technology, applied in the field of flexible electrode array and its preparation, can solve the problems of poor repeatability, stability, sensitivity and anti-interference, inability to detect multiple heavy metal ions at the same time, increase production costs, etc., to improve sensitivity , Improve the electrochemical performance and promote the effect of transfer speed

Active Publication Date: 2021-10-22
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite some progress in electrochemical sensors and microfluidic devices, there are still some limitations in the design of three-electrode systems and complex chip assemblies, which complicate operations and increase production costs
Moreover, it is impossible to detect multiple heavy metal ions in human serum at the same time, and the repeatability, stability, sensitivity and anti-interference of the detection are poor

Method used

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  • Flexible electrode array and preparation method and application thereof
  • Flexible electrode array and preparation method and application thereof
  • Flexible electrode array and preparation method and application thereof

Examples

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preparation example Construction

[0033] In one embodiment of the present disclosure, a method for preparing a flexible electrode array includes: including: using chronoamperometry to deposit a bismuth film on the surface of a CNT-PDMS substrate, and then dropping the prepared GLT-CNT-GTA onto the deposited On the CNT-PDMS electrode with bismuth film.

[0034] Further, the preparation method of the CNT-PDMS includes: uniformly dispersing the CNT and PDMS by a dry mixing method, and then performing vacuum treatment; adding PDMS and a curing agent to the CNT-PDMS in a weight ratio of 7-13:0.5-2 In the composite material, mixing and stirring; the cavity mold is prepared by 3D printing technology, and then the mold is fixed on the glass, and the CNT-PDMS composite material is filled into the cavity of the mold.

[0035] Further, the process of depositing bismuth film includes:

[0036] The CNT-PDMS flexible electrode was transferred to the mixed solution of bismuth nitrate and hydrochloric acid, and the CNT-PDMS / ...

Embodiment 1

[0048] A microfluidic electrochemical sensor, the specific preparation method is as follows:

[0049] Firstly, 10 wt.% CNT and PDMS were dispersed by dry mixing at a speed of 150 r / min for 24 hours. The CNT-PDMS composite was vacuum-treated in a vacuum pressure chamber (>40Pa) for 30 min. Subsequently, PDMS and curing agent were added to the CNT-PDMS composite material at a weight ratio of 10:1, and mixed and stirred for 2 min to prepare for use. In order to obtain CNT-PDMS electrodes with the same radius of 1.5 mm and the same thickness of 500 μm, 3D printing was used to manufacture cavity molds. Fix the mold to the glass, and then fill the above-mentioned CNT-PDMS composite into the cavity of the mold. Before the CNT-PDMS is cured, carbon fibers are inserted as wires, which will be used to connect the electrochemical workstation during the measurement. Finally, use an oven to cure the mixed CNT-PDMS composite at 70 °C for 1 hour to obtain a CNT-PDMS electrode; transfer th...

experiment example 1

[0053] Based on embodiment 1, the electrochemical behavior test is carried out, and the specific measurement conditions are as follows:

[0054] To evaluate the electrochemical performance of the CNT-PDMS / BiNPs / GLT-CNT-GTA electrode, the [Fe(CN) 6 ] 3- The electrochemical response was compared with CNT-PDMS electrode and CNT-PDMS / BiNPs electrode in 0.1M KCl.

[0055] In the presence of 5mM [Fe(CN) 6 ] 3- and 0.1M KCl solution to characterize the CNT-PDMS / BiNPs / GLT-CNT-GTA electrode. CV measurements were performed at a scan rate of 50 mV / s over a potential range of -0.65V-0.65V. EIS testing is performed at a frequency of 1Hz-100kHz at open circuit voltage. DPV measurements were made with an amplitude of 25mV, a pulse of 50ms, an interval of 500ms, and a quiet time of 5s.

[0056] Analysis of test results:

[0057] CV and EIS were also used to study the electron transfer capabilities of CNT-PDMS electrodes, CNT-PDMS / BiNPs electrodes and CNT-PDMS / BiNPs / GLT-CNT-GTA electrod...

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Abstract

The invention belongs to the technical field of microfluidic setting, and particularly relates to a flexible electrode array and a preparation method and application thereof, the flexible electrode array comprises a CNT-PDMS substrate, and the surface of a substrate electrode is provided with a bismuth film and a hydrogel film. The electrode array is integrated in a micro-fluidic chip, and Cd < 2 + >, Pb < 2 + > and Hg < 2 + > in human serum can be detected at the same time. Due to the advantages of simple structure, simplicity in operation, practicability, reliability and low cost, the microfluid device has a potential application prospect in detection of human serum.

Description

technical field [0001] The invention belongs to the technical field of microfluidic devices, and in particular relates to a flexible electrode array and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Heavy metal pollution is increasing day by day, including Pb, Cd, Cu, Hg, As, Ni, Cr and other heavy metal ions, which are posing a serious threat to human health. [0004] So far, many researchers have made a lot of efforts to develop the detection of toxic heavy metal ions, including liquid chromatography, ultraviolet / visible spectroscopy, X-ray fluorescence spectroscopy (XFS), capillary electrophoresis (CE), microprobe (MP) , Atomi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30
CPCG01N27/26G01N27/30Y02A20/20
Inventor 王力陈俊张文贤苏伟光刘鹏博李安庆
Owner QILU UNIV OF TECH
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