A flexible l-phenylalanine electrochemical sensor based on dendritic silver nanostructures

A phenylalanine and electrochemical technology, applied in the direction of electrochemical variables of materials, can solve the problems of difficult bending or extension of electronic devices, damage to electronic devices, etc., and achieve the effect of simple preparation process and excellent electrical conductivity.

Active Publication Date: 2020-06-02
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Common amino acid electrochemical sensors are made of rigid conductive electrodes such as glassy carbon electrodes and gold electrodes. Their hard and brittle nature makes it difficult for electronic devices to bend or stretch. Once there is a large deformation, the electronic devices will be damaged.

Method used

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  • A flexible l-phenylalanine electrochemical sensor based on dendritic silver nanostructures
  • A flexible l-phenylalanine electrochemical sensor based on dendritic silver nanostructures
  • A flexible l-phenylalanine electrochemical sensor based on dendritic silver nanostructures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The ITO glass is self-assembled in 6 layers, and the ITO glass needs to be cleaned before assembly. The cleaning process is to ultrasonically clean the ITO glass with deionized water, acetone and ethanol for 30 minutes, respectively. After cleaning, put it into an ozone cleaner for surface hydroxylation. Then the ITO glass was self-assembled layer by layer in PDDA (polydiallyl dimethyl ammonium chloride) and PSS (polystyrene sodium sulfonate) solutions.

[0026] Deposit dendritic nano-silver on the assembled ITO glass, the method adopted is chronoamperometry, the reference electrode is a saturated mercurous sulfate electrode, the counter electrode is a platinum wire, the working electrode is an assembled ITO glass, and the electrolyte is AgNO 3 and NaNO 3 Mixed solution, deposition time 400s, AgNO 3 The concentration is 0.008mol / L, NaNO 3 The concentration is 0.1mol / L, and the set potential is -0.3V. Through electrochemical deposition, a white nano-silver conducti...

Embodiment 2

[0029] 6-layer self-assembly of ITO glass. ITO glass needs to be cleaned before assembly. The cleaning process is to ultrasonically clean the ITO glass with deionized water, acetone and ethanol for 30 minutes, respectively. After cleaning, put it into an ozone cleaner for surface hydroxylation. Then the ITO glass was self-assembled layer by layer in PDDA and PSS solution.

[0030] Deposit dendritic nano-silver on the assembled ITO glass, the method adopted is chronoamperometry, the reference electrode is a saturated mercurous sulfate electrode, the counter electrode is a platinum wire, the working electrode is an assembled ITO glass, and the electrolyte is AgNO 3 and NaNO 3 Mixed solution, deposition time 700s, AgNO 3 The concentration is 0.008mol / L, NaNO 3 The concentration is 0.1mol / L, and the set potential is -0.3V.

[0031] Put the silver-deposited ITO glass into the PDMS solution and put it into an oven for curing. The curing temperature is 70° C. and the curing ti...

Embodiment 3

[0033] 6-layer self-assembly of ITO glass. ITO glass needs to be cleaned before assembly. The cleaning process is to ultrasonically clean the ITO glass with deionized water, acetone and ethanol for 30 minutes, respectively. After cleaning, put it into an ozone cleaner for surface hydroxylation. Then the ITO glass was self-assembled layer by layer in PDDA and PSS solution.

[0034]Deposit dendritic nano-silver on the assembled ITO glass, the method adopted is chronoamperometry, the reference electrode is a saturated mercurous sulfate electrode, the counter electrode is a platinum wire, the working electrode is the previously assembled ITO glass, and the electrolyte is AgNO 3 and NaNO 3 Mixed solution, deposition time 800s, AgNO 3 The concentration is 0.008mol / L, NaNO 3 The concentration is 0.1mol / L, and the set potential is -0.3V.

[0035] Put the silver-deposited ITO glass into the PDMS solution and put it into an oven for curing. The curing temperature is 70° C. and th...

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Abstract

The invention discloses a flexible L-phenylalanine electrochemical sensor based on a dendritic nanometer silver structure, and belongs to the technical field of electrochemical sensors. A flexible electrode substrate is PDMS, and a layer of nanometer conducting layer with a dendritic structure is on the PDMS substrate. The preparation method comprises the following steps: self-assembly of ITO glass is carried out; electrochemical deposition of the nanometer silver film with a dendritic structure is carried out on the ITO glass; the ITO glass with the nanometer silver conducting layer is placed in a PDMS solution for solidification; after solidification, the PDMS film is uncovered from the ITO glass, and the flexible L-phenylalanine electrochemical sensor based on the dendritic nanometer silver structure is obtained. The flexible L-phenylalanine electrochemical sensor based on the dendritic nanometer silver structure has good response and simple preparation method, quantitative production is easy to carry out, and the product is hopeful to be widely applied to the fields of industrial and agricultural production, bioscience research, especially wearable medical equipment.

Description

technical field [0001] The invention relates to the field of electrochemical sensors, in particular to a flexible L-phenylalanine electrochemical sensor based on a dendritic nano-silver structure. Background technique [0002] L-phenylalanine (L-Phe) is one of the eight essential amino acids that cannot be synthesized by the human body. It is an important biochemical product and has a wide range of applications in many industries. L-phenylalanine can be added to food to strengthen its nutritional function and supplement amino acids in the body. L-phenylalanine is an important synthetic raw material for the sweetener aspartame. The sweetness of aspartame is higher than that of sucrose, but its calorific value is less than 1 / 200. It is an ideal sweetener for people with high blood pressure and diabetes. In human metabolism, L-phenylalanine generates L-tyrosine (L-Tyr) under the catalysis of phenylalanine hydroxylase. If phenylalanine hydroxylase is congenitally defective, L-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
CPCG01N27/48
Inventor 孙晶李秀平郎明非王迪周文慧罗才辉罗来福马龙飞
Owner DALIAN UNIV
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