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Construction of organic gate electrochemical transistor biosensor

A technology of biosensors and transistors, applied in sensors, electric solid-state devices, semiconductor devices, etc., can solve problems such as excessive working voltage, achieve high accuracy, low detection limit, and increase the effect of amplified signals

Active Publication Date: 2021-05-28
JIANGXI SCI & TECH NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it requires the voltage of the power supply to be between 1 and 10V, and the required working voltage is too large

Method used

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  • Construction of organic gate electrochemical transistor biosensor
  • Construction of organic gate electrochemical transistor biosensor
  • Construction of organic gate electrochemical transistor biosensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of PEDOT / PSS thin film organic electrochemical transistor biosensor comprises the following steps:

[0043] 1) Add the original PEDOT / PSS aqueous solution into the dispersion liquid DMSO and sonicate for 30 minutes. Then, PEDOT / PSS films were prepared by vacuum filtering the solution onto a porous PVDF membrane. The film was then transferred to a glass substrate, and the prepared film was dried at 120° C. for 15 minutes. In the final step, all PEDOT / PSS films were annealed at 185 °C for 1 h.

[0044] 2) PEDOT / PSS thin film OECT device structure such as figure 1shown. Prepare two pieces of the PEDOT / PSS film obtained in step (1), cut into a rectangle), one as the source and drain material (channel material), and the other as the gate material, and transfer them to a transparent PET flexible substrate (no need to use adhesive binder, the PEDOT / PSS film can be well bonded to the flexible substrate after annealing). Use two insulated copper wires...

Embodiment 2

[0046] The preparation method of PEDOT / PSS thin film organic electrochemical transistor biosensor comprises the following steps:

[0047] 1) Add the original PEDOT / PSS aqueous solution into the dispersion EtOH and sonicate for 30 minutes. Then, PEDOT / PSS films were prepared by vacuum filtering the solution onto a porous PVDF membrane. The film was then transferred to a glass substrate, and the prepared film was dried at 120° C. for 15 minutes. In the final step, all PEDOT / PSS films were annealed at 185 °C for 1 h.

[0048] 2) PEDOT / PSS thin film OECT device structure such as figure 1 shown. Prepare two pieces of the PEDOT / PSS film obtained in step (1), cut into a rectangle), one as the source and drain material (channel material), and the other as the gate material, and transfer them to a transparent PET flexible substrate (no need to use adhesive binder, the PEDOT / PSS film can be well bonded to the flexible substrate after annealing). Use two insulated copper wires to co...

Embodiment 3

[0050] The preparation method of PP thin film organic electrochemical transistor biosensor comprises the following steps:

[0051] 1) Add the original PEDOT / PSS aqueous solution into the dispersion EG and sonicate for 30 minutes. Then, PEDOT / PSS films were prepared by vacuum filtering the solution onto a porous PVDF membrane. The film was then transferred to a glass substrate, and the prepared film was dried at 120° C. for 15 minutes. In the final step, all PEDOT / PSS films were annealed at 185 °C for 1 h.

[0052] 2) PEDOT / PSS thin film OECT device structure such as figure 1 shown. Prepare two PEDOT / PSS films obtained in step (1), cut into rectangles), one as the source and drain material (channel material), and the other as the gate material, and transfer them to a transparent polyacrylamide flexible substrate (no need Using a binder, the PEDOT / PSS film is well bonded to the flexible substrate after annealing). Use two insulated copper wires to connect the two ends of th...

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Abstract

The invention discloses construction of an organic gate electrochemical transistor biosensor. The organic gate electrochemical transistor biosensor comprises a flexible substrate; two PEDOT / PSS films are arranged on the flexible substrate, one film is used as a channel material, and the other film is used as a gate electrode; one end of a channel material is a source electrode, and the other end is a drain electrode. The source electrode and the drain electrode are connected with one digital source meter, the source electrode and the gate electrode are connected with the other digital source meter, and then the sensor connected with the circuit is used for detecting the glucose concentration. The PEDOT / PSS film is obtained by adding a PEDOT / PSS aqueous solution into the dispersion liquid, filtering the PEDOT / PSS aqueous solution on the porous PVDF film in vacuum, drying and annealing. The PEDOT / PSS film is adopted as the gate electrode and the source-drain layer at the same time, the prepared organic electrochemical transistor shows high transconductance and high switch ratio, signal amplification is facilitated, and detection sensitivity is improved. The sensor disclosed by the invention is high in glucose concentration monitoring accuracy and good in sensitivity.

Description

technical field [0001] The invention relates to the fields of biosensing and transistors, in particular to the construction of organic gate electrochemical transistor biosensors. Background technique [0002] Continuous monitoring of small biomolecules currently has a wide range of applications, but the number of wearable sensing devices reported in the literature is limited. Electrochemical conduction has been widely used, and optical and magnetic sensors have also been attempted. Glucose sensors are commercially available today, but there are challenges in miniaturization, mass production, and compatibility with established microfluidic platforms as well as emerging products due to the need for electrode implantation or relatively bulky readout electronics. big difficulty. On the other hand, running the device in different liquid matrices (such as tissue fluid, breath, sweat, saliva and tears) has the problem of unstable and irreproducible test results; The concentratio...

Claims

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Application Information

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IPC IPC(8): H01L51/10H01L51/30H01L51/40H01L51/05C08L65/00C08L25/18C08J5/18A61B5/145A61B5/1477
CPCC08J5/18A61B5/14532A61B5/1477C08J2365/00C08J2425/18H10K85/1135H10K85/141H10K10/46H10K77/111H10K10/84Y02E10/549
Inventor 蒋丰兴刘小芳杜玉扣卢丽敏徐景坤段学民蓝小琪
Owner JIANGXI SCI & TECH NORMAL UNIV
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