Magnetic screen printing electrode based on steel shell magnetic shielding

Abstract

The utility model discloses a magnetic screen-printed electrode based on steel shell magnetic shielding. The magnetic screen-printed electrode comprises an electrode substrate, a reference electrode, a working electrode, a counter electrode and a steel shell, the reference electrode, the working electrode and the counter electrode are arranged on the surface of the electrode substrate; the steel shell is fixed to the back face of the electrode substrate, a magnetic material is arranged in the steel shell, steel provides a safety place for the magnet, meanwhile, magnetic shielding is provided, and the magnetic force is only concentrated on one face and enhanced. According to the utility model, the possibility that the magnets or ferromagnetic particles are exposed in the solution except for the contact with the surface of the printed electrode to adsorb impurities is avoided, so that the purity of the surface of the electrode is effectively guaranteed, and the printed electrode has obvious advantages in the aspects of improving the working efficiency and the test accuracy of the printed electrode.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical detection, in particular to a magnetic screen-printed electrode based on steel shell magnetic shielding. Background Art

[0002] Screen printed electrodes (SPEs) are electrode systems formed by printing conductive ink onto a substrate using screen printing technology. Screen printing is a long-standing printing technique, having been used in the manufacture of circuit boards in the electronics industry since the 1940s and 1950s. Using a screen printing plate as a mold, screen-printed electrodes offer excellent electrochemical properties and a relatively simple manufacturing process. The resulting electrodes can be sized flexibly, offering potential for miniaturization.

[0003] At present, magnetic screen-printed electrodes mainly use magnetic ink as the preparation material. However, magnetic ink may have problems with poor adhesion and the formation of pore structure during the deposition and curing process, resulting in uneven ink on the electrode surface and possibly affecting the mass transfer process, which in turn leads to weak electrode magnetism, making it difficult to sufficiently attract magnetic nanoparticles in the solution, affecting the electrochemical performance. Therefore, it is possible to consider using an external magnet instead of magnetic ink. However, since the magnetic field area generated by the external magnet is difficult to accurately control, there is a problem of causing some nanoparticles to be adsorbed to the outside of the electrode, resulting in the inability to effectively detect the signal, and thus causing the risk of measurement error. In addition, the method of using an external magnet also has the problem of uneven magnetic field, which may cause nanoparticles to be enriched on both the surface and back of the electrode, affecting the reliability of the detection results. Therefore, the above technical problems urgently need to be deeply resolved to improve the magnetic attraction accuracy of magnetic screen-printed electrodes and the repeatability of signal detection results. Utility Model Content

[0004] The technical problem to be solved by the utility model is to solve the problem that the magnetism of magnetic screen-printed electrodes is too weak due to the use of magnetic ink and the fixed position of nanoparticles cannot be controlled due to the use of external magnets or ferromagnetic particles, and to provide a magnetic screen-printed electrode based on steel shell magnetic shielding that is easy to detect and has stable performance.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A magnetic screen-printed electrode based on steel shell magnetic shielding, comprising:

[0007] A screen-printed electrode and a steel shell; the screen-printed electrode includes an electrode substrate, a reference electrode, a working electrode, and a counter electrode, all of which are disposed on the surface of the electrode substrate; the working electrode is disposed on the electrode substrate, the reference electrode is disposed on one side of the working electrode, and the counter electrode is disposed on the other side of the working electrode. The surface of the working electrode is modified with nanoparticles.

[0008] The steel shell is fixed to the back side of the electrode substrate, and the steel shell has magnetic material built in.

[0009] Furthermore, the counter electrode is symmetrically arranged with the reference electrode around the working electrode to ensure uniform current distribution.

[0010] Furthermore, the reference electrode, working electrode and counter electrode are adhered to the surface of the electrode substrate by conductive adhesive.

[0011] Furthermore, the reference electrode, working electrode and counter electrode are directly printed on the surface of the electrode substrate by screen printing technology.

[0012] Furthermore, the steel shell is made of steel and has magnets or ferromagnetic particles built into it; the steel shell is circular or rectangular and is fixed to the back of the electrode substrate by tape or glue.

[0013] Furthermore, the magnet is a ferrite permanent magnet or a metal alloy magnet.

[0014] Furthermore, the ferrite permanent magnet is neodymium.

[0015] Furthermore, the ferromagnetic particles are soft magnetic material particles or hard magnetic material particles.

[0016] Compared with the prior art, the above technical solution adopted by the present invention has the following technical effects:

[0017] This new magnetic screen-printed electrode utilizes a steel shell for magnetic shielding, securing the magnetism to one side of the magnet. This ensures that the magnetic field is evenly applied to the electrode on the substrate surface during use, avoiding defects such as uneven or weak magnetic fields that can lead to poor test results, and preventing ferromagnetic particles from being attracted to the back of the electrode. This ensures the purity of the electrode surface and improves the consistency and stability of test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front and back schematic diagram of the utility model.

[0019] Figure 2 It is a side view and a top view of the utility model.

[0020] Figure 3 It is a schematic diagram of the steel shell structure of the present utility model.

[0021] The reference numerals are: 1 - electrode substrate, 2 - reference electrode, 3 - working electrode, 4 - counter electrode and 5 - steel shell. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] To achieve the above purpose, the utility model proposes a magnetic screen-printed electrode based on steel shell magnetic shielding, such as Figure 1 、 Figure 2 、 Figure 3 As shown, it includes screen-printed electrodes and a steel shell 5.

[0024] Figure 1 (a) is a schematic diagram of the front view of the magnetic screen-printed electrode. Figure 1 (b) is a schematic diagram of the back side of the magnetic screen-printed electrode. Figure 2 (a) is a side view of the magnetic screen-printed electrode. Figure 2 (b) is a schematic top view of the magnetic screen-printed electrode.

[0025] The screen-printed electrode system includes an electrode substrate 1, a reference electrode 2, a working electrode 3, and a counter electrode 4. These electrodes are all positioned on the surface of the electrode substrate 1. The working electrode 3 is placed in the center of the electrode substrate 1 to ensure a uniform magnetic field around it, facilitating nanoparticle adsorption and electrochemical reactions. The counter electrode 4 is symmetrically positioned with the reference electrode 2, centered around the working electrode 3, to ensure uniform current distribution. The distance between the reference electrode 2 and the counter electrode 4 is kept moderate to provide a stable potential reference.

[0026] The steel shell 5 is fixed to the back of the electrode substrate 1. The steel shell 5 has built-in magnetic material, which can ensure that the magnet is fixed on one side of the magnet and ensure that the magnetic field is evenly applied to the electrode on the surface of the substrate, and can be used accurately and efficiently in the detection field.

[0027] The surface of the working electrode 3 is modified with nanoparticles as needed.

[0028] like Figure 3 As shown, the steel shell 5 is a hollow shell made of steel, which has a built-in magnet or magnetic particles; the steel shell 5 is circular or rectangular, and can provide a magnetic shielding function, so that the magnetic force is concentrated and enhanced on one surface, effectively ensuring the directionality of the magnetic attraction of the working electrode surface; the steel shell 5 is fixed to the back of the electrode substrate 1 by tape or glue.

[0029] The magnet is neodymium. The ferromagnetic particles are soft magnetic material particles or hard magnetic material particles.

[0030] In this printed electrode, when the electrode is in use, under the action of the magnetic field force of the external magnetic field and based on the magnetic shielding effect of the steel shell, the ferromagnetic particles are only evenly distributed in the electrode substrate 1 area below the working electrode, and the nanoparticles will be adsorbed and only adsorbed on the surface of the working electrode 3. The magnetism is highly concentrated and evenly distributed on its surface, so that related testing work can be carried out efficiently and accurately.

[0031] It can be seen that the utility model can attract magnetic nanoparticles without using magnetic ink, solving the problem that the magnetic ink may have weak electrode magnetism and is difficult to sufficiently attract magnetic nanoparticles in the solution, and can be better applied to the field of rapid detection.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A magnetic screen-printed electrode based on steel shell magnetic shielding, characterized in that: include: Screen-printed electrodes and steel shell (5); The screen-printed electrode comprises an electrode substrate (1), a reference electrode (2), a working electrode (3) and a counter electrode (4); the reference electrode (2), the working electrode (3) and the counter electrode (4) are all arranged on the surface of the electrode substrate (1); the working electrode (3) is arranged on the electrode substrate (1), the reference electrode (2) is arranged on one side of the working electrode (3), and the counter electrode (4) is arranged on the other side of the working electrode (3); and the surface of the working electrode (3) is modified with nanoparticles; The steel shell (5) is fixed to the back side of the electrode substrate (1), and magnetic material is arranged inside the steel shell (5).

2. The magnetic screen-printed electrode based on steel shell magnetic shielding according to claim 1, characterized in that: The counter electrode (4) is symmetrically arranged with the reference electrode (2) with the working electrode (3) as the center.

3. The magnetic screen-printed electrode based on steel shell magnetic shielding according to claim 1, characterized in that: The reference electrode (2), the working electrode (3) and the counter electrode (4) are adhered to the surface of the electrode substrate (1) by means of conductive adhesive.

4. The magnetic screen-printed electrode based on steel shell magnetic shielding according to claim 1, characterized in that: The reference electrode (2), the working electrode (3) and the counter electrode (4) are directly printed on the surface of the electrode substrate (1) by screen printing technology.

5. The magnetic screen-printed electrode based on steel shell magnetic shielding according to claim 1, characterized in that: The steel shell (5) is made of steel and has a built-in magnet or ferromagnetic particles; the steel shell (5) is circular or rectangular and is fixed to the back of the electrode substrate (1) by adhesive tape or glue.

6. The magnetic screen-printed electrode based on steel shell magnetic shielding according to claim 5, characterized in that: The magnet is a ferrite permanent magnet or a metal alloy magnet.

7. The magnetic screen-printed electrode based on steel shell magnetic shielding according to claim 6, characterized in that: The ferrite permanent magnet is neodymium.

8. The magnetic screen-printed electrode based on steel shell magnetic shielding according to claim 5, characterized in that: The ferromagnetic particles are soft magnetic material particles or hard magnetic material particles.

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