A device and its application for improving the measurement signal of two-dimensional materials on a diamond anvil cell.

Abstract

This invention provides an apparatus and its application for improving the measurement signal of two-dimensional materials on a diamond anvil cell. It includes an upper anvil, a lower anvil, a metal spacer, and a gold plating. The material to be measured (TMT), which is a two-dimensional material or a heterojunction, is arranged at the center of the surface of the upper or lower anvil. Both the surface of the diamond anvil with the TMT and the surface of the TMT are coated with gold. The surfaces of the upper and lower anvils are perfectly aligned. The metal spacer is clamped between the upper and lower anvils. A through-hole is located at the center of the lower and upper anvils. The through-hole is filled with a pressure-transmitting medium and a constant-pressure medium. In summary, this invention provides an apparatus and its application for improving the measurement signal of two-dimensional materials on a diamond anvil cell, which can solve the problems of weak measurement signals and interference fringes in existing measurement techniques.

Description

Technical Field

[0001] This invention relates to the field of signal testing technology for two-dimensional semiconductor materials on substrates, and more specifically to an apparatus and application for improving the measurement signal of two-dimensional materials on a diamond anvil cell. Background Technology

[0002] As outstanding representatives of new materials, two-dimensional materials have excellent physical properties in terms of electrical, optical, thermal, and mechanical properties. Since the discovery of graphene, the types of two-dimensional materials have been continuously developed and studied, from semi-metallic graphene to narrow-bandgap semiconductors such as black phosphorus and transition metal chalcogenides, and then to wide-bandgap insulators, the variety is rich. These two-dimensional materials have unique advantages: (1) They have very small size, generally at the micrometer level, which is very beneficial for the preparation of miniaturized and integrated electronic and optoelectronic devices; (2) Two-dimensional materials are very thin, reaching the atomic layer thickness, making them very easy to control and very sensitive to force, heat, light, electricity, and magnetism; (3) There are van der Waals forces between two-dimensional materials, which can stack the same or different two-dimensional materials together to form homojunctions or heterojunctions, and complement each other in terms of performance.

[0003] The novel physical properties of two-dimensional materials are essentially determined by their crystal and electronic structures. Therefore, controlling the crystal and electronic structures of two-dimensional materials is of great significance for achieving novel physical effects. In recent years, research on the control of lattice matching and interlayer coupling in two-dimensional materials has been very rapid. Among them, a representative example is the van der Waals heterostructure, which is formed by directly stacking different two-dimensional materials or stacking and rotating two-dimensional materials at different angles. The application of high-pressure methods, which can efficiently, continuously, and reversibly control the structure of materials, in two-dimensional materials has also attracted much attention.

[0004] Diamond anvil cells (DACs) are important devices for generating high pressure. Piston-cylinder DACs are commonly used due to their convenience, compact size, and high stability. As the diameter of the anvil face decreases, the pressure that a DAC can generate increases, reaching over one million atmospheres (100 GPa). Such high pressures can cause significant changes in the volume and thickness of the studied material system, leading to atomic rearrangement, increased overlap of electron orbitals, and ultimately alteration of the material's crystal and electronic structures.

[0005] When studying two-dimensional materials using diamond anvil cells (DACs), the first step is to transfer the two-dimensional material or heterojunction onto the surface of the anvil. Then, a metal gasket, a pressure-transmitting medium, a pressure-regulating medium, and a pressure screw are sequentially assembled, followed by high-pressure testing. Several challenges arise in this process. First, there's the two-dimensional material transfer. Because the diameter of the diamond anvil cell is only a few hundred micrometers or even tens of micrometers (50µm-500µm), transferring two-dimensional materials of similar micrometer size onto an anvil is experimentally difficult. Therefore, there has been considerable research on this step. Currently, a dry transfer method using a two-dimensional material transfer platform has been successfully implemented to transfer two-dimensional materials onto the diamond anvil cell surface, ensuring a certain success rate. Second, there's the assembly process. The metal gasket used in the assembly process has a circular hole (called the sample cavity) with a diameter smaller than that of the anvil. During assembly, the pressure-transmitting medium (silicone oil, alcohol, etc.) needs to be sequentially applied. The installation of the pressure-conserving medium (ruby) in the sample chamber presents significant challenges to experimental operation. Furthermore, the assembly of the metal gasket can easily scratch the two-dimensional material on the diamond anvil cell surface, severely impacting subsequent measurement quality. Then there's the signal measurement process. Because the diamond on the anvil is completely pure and transparent, and the thin layer of two-dimensional material is also nearly transparent, when using lasers to measure the Raman, fluorescence, and absorption signals of the material, the laser signal completely passes through the diamond, only recovering a weak reflected signal. In cases where the material is thin and has few layers, there may be no reflected signal at all. Moreover, the pressure-transmitting medium between the two diamonds creates a narrow gap that easily generates light wave interference, greatly affecting signal collection and leading to experimental failure. Therefore, developing a method to reduce the assembly difficulty of the diamond anvil cell and improve the measurement signal of two-dimensional materials on a diamond anvil cell, along with a suitable sample, is particularly important and urgent. Summary of the Invention

[0006] The technical problem that this invention needs to solve is:

[0007] The assembly process of diamond anvil cells is quite difficult, and the two-dimensional material is easily damaged when assembling the metal gasket. During the signal measurement process, the laser signal passes through the completely transparent diamond, and only a weak reflected signal can be recovered, or even no reflected signal when the material is thin. Moreover, when the laser passes through the pressure transmission medium gap between the two diamonds, light wave interference is easily generated, which affects the measurement results and causes the experiment to fail.

[0008] The technical problem of this invention is solved by the following solution:

[0009] The present invention provides a method for solving the above-mentioned technical problems by attaching a diamond anvil cell containing two-dimensional material to a gold-plated plate, placing it upside down in a vacuum evaporation coating apparatus, and depositing a nano-gold layer of 800-1200 nm, preferably 1000 nm, on the surface of the diamond anvil cell. A double-sided measurement method is used for signal measurement: the material measurement signal is collected on the side with the nano-gold layer, while the signal of the constant-pressure medium is measured on the other side to determine the pressure magnitude. This method enables total reflection of the laser when passing through a completely transparent diamond, greatly improving the intensity of the reflected signal and solving the problem of no or weak reflection signal of two-dimensional materials on a transparent diamond substrate. Furthermore, the nano-gold layer adheres tightly to the material, and the laser does not pass through the gap in the pressure-transmitting medium, thus solving the problem of light wave interference. Simultaneously, the nano-gold layer also protects the two-dimensional material, solving the problem of the two-dimensional material being easily scratched by metal gaskets during the assembly of the diamond anvil cell, greatly reducing the assembly difficulty and improving the success rate of high-pressure experiments.

[0010] This invention relates to a device and its application for improving the measurement signal of two-dimensional materials on a diamond anvil cell, comprising an upper anvil, a lower anvil, a metal pad, and a gold plating layer. The material to be measured (TMT), which is a two-dimensional material or a heterojunction, is arranged at the center of the surface of the upper or lower anvil. Both the surface of the diamond anvil with the TMT and the surface of the TMT are coated with gold. The surfaces of the upper and lower anvils are perfectly aligned. The metal pad is clamped between the upper and lower anvils. A through-hole is formed in the center of the metal pad, located at the center of the lower and upper anvils. The through-hole is filled with a pressure-transmitting medium and a constant-pressure medium. The constant-pressure medium and the TMT are located on opposite sides of the gold plating layer.

[0011] In a preferred embodiment, the thickness of the gold plating layer is 800-1200 nm, preferably 1000 nm. Controlling the thickness of the gold plating layer in this invention is to optimize the improvement effect. Too thick a gold plating layer will lead to insensitive and inaccurate pressure transmission, with the actual value being less than the measured value. Too thin a gold plating layer will prevent total reflection of the laser, significantly reducing the signal improvement effect. The two-dimensional material described in this invention can be a single layer, multiple layers, a thick layer, or a bulk material, and the heterojunction is formed by stacking a single type of two-dimensional material.

[0012] In a preferred embodiment, the pressure transmitting medium is silicone oil or an ethanol-alcohol mixture, and the constant pressure medium is ruby.

[0013] In a preferred embodiment, the diamond anvil is a piston-cylinder type diamond anvil, which also includes an upper piston cylinder, a lower piston cylinder and a pressure screw. The upper and lower anvils are respectively fixed to the center of the upper and lower piston cylinders by screws, and the upper and lower piston cylinders are fixed together by the pressure screw.

[0014] This invention relates to an apparatus and application for improving the measurement signal of two-dimensional materials on a diamond anvil cell, comprising the following steps: S1, transferring two-dimensional materials or heterojunctions to the surface of the upper or lower anvil cell of a diamond anvil cell;

[0015] S2, fix the diamond anvil cell base with the material to be tested on the gold plate and place it upside down in the high vacuum evaporation coating instrument;

[0016] S3, turn on the high vacuum evaporation coating instrument and deposit a gold layer with a thickness of 800-1200nm on the diamond anvil cell containing the material to be tested.

[0017] S4, assemble diamond anvil cells; the upper and lower anvil cells are respectively fixed to the center of the upper and lower piston cylinders by screws, the metal gasket is clamped between the upper and lower anvil cells, the metal gasket has a through hole in the center, the through hole is located in the center of the lower anvil and the upper anvil, the through hole is filled with a pressure transmission medium, and a constant pressure medium is assembled in the through hole.

[0018] S5 employs a double-sided measurement method to measure signals. Signal measurement is performed on the side with the pressure-transmitting medium to determine the pressure level of the device. The diamond anvil cell is then flipped over to measure the sample property signals. Due to the presence of the gold plating and the use of the double-sided measurement method, complete isolation is achieved when the laser irradiates the ruby ​​and the test material. This means there is no material signal interference when measuring pressure signals, and no ruby ​​signal interference when measuring material property signals. The resulting signals are pure, accurate, and of high intensity.

[0019] In a preferred embodiment, in S1, a two-dimensional material or heterojunction is transferred to the surface of a diamond anvil cell using a two-dimensional material transfer platform, employing either a wet transfer method or a dry transfer method. The two-dimensional material or heterojunction should be transferred to the center of the diamond anvil cell.

[0020] In a preferred embodiment, in S2, a diamond anvil cell base with the material to be tested is attached to a gold-plated plate using high-temperature resistant double-sided adhesive.

[0021] In a preferred embodiment, in step S3, the vacuum level of the high-vacuum evaporation coating apparatus should be less than 1*10. -5 For gold plating, the plating rate should be maintained between 0.1 nm / s and 0.2 nm / s. The amount of gold in the vapor deposition boat should be no less than 0.5 g. After gold plating, the diamond anvil cell should be left to stand for at least 12 hours. The amount of gold in the vapor deposition boat should be no less than 0.5 g to prevent insufficient gold content; the diamond anvil cell should be left to stand for at least 12 hours to ensure the gold plating layer cures.

[0022] In a preferred embodiment, in S5, the sample property signal measurement includes Raman signal measurement, fluorescence signal measurement, and reflection signal measurement.

[0023] In a preferred embodiment, in step S5, a Raman spectrometer is used to test the Raman spectral signal and fluorescence spectral signal of the material region to be tested.

[0024] In summary, the method provided in this invention for depositing a gold nanolayer of 800-1200 nm, preferably 1000 nm, on the surface of a diamond anvil cell enables total internal reflection of the laser when passing through a completely transparent diamond substrate, greatly improving the signal reflection intensity and solving the problem of no or weak reflection signals of two-dimensional materials on transparent diamond substrates. Moreover, because the gold nanolayer is tightly bonded to the two-dimensional material, the laser does not pass through the gap of the pressure transmission medium, solving the problems of weak test signals and interference fringes in existing measurement techniques.

[0025] Meanwhile, the vapor-deposited nano-gold layer provided in the method of the present invention can also play a certain protective role for the two-dimensional material on the surface of the diamond anvil, solving the problem that the two-dimensional material is easily scratched by the metal gasket during the assembly process of the diamond anvil, greatly reducing the assembly difficulty and improving the success rate of the experiment.

[0026] The principle and operation method of this invention are simple and feasible, and the experimental instruments and materials are also relatively easy to obtain. Attached Figure Description

[0027] Figure 1 This is a photograph of a diamond anvil cell.

[0028] Figure 2 This is a schematic diagram illustrating the working principle of a diamond anvil cell.

[0029] Figure 3 Optical photographs and measurement results of the two-dimensional material WSe2 on a diamond anvil cell. Figure 3 (a) shows an optical micrograph of WSe2 before it was transferred to a diamond anvil cell for gold plating. Figure 3 (b) An optical micrograph of WSe2 after it has been transferred to a diamond anvil cell and plated with gold; Figure 3 (c) shows a comparison of WSe2 Raman signals before and after gold plating; Figure 3 (d) shows a comparison of WSe2 fluorescence signals before and after gold plating; Figure 3 (e) shows a comparison of WSe2 fluorescence signals before and after gold plating under pressure.

[0030] Figure 4 Optical photographs and measurement results of the two-dimensional WSe2 / MoS2 heterojunction on a diamond anvil cell. Figure 4 (a) shows an optical micrograph of the WSe2 / MoS2 heterojunction before it was transferred to a diamond anvil cell before gold plating. Figure 4 (b) An optical micrograph of the WSe2 / MoS2 heterojunction after it has been transferred to a diamond anvil cell and plated with gold. Figure 4 (c) shows a comparison of the Raman signals of the WSe2 / MoS2 heterojunction before and after gold plating; Figure 4 (d) shows a comparison of the fluorescence signals of the WSe2 / MoS2 heterojunction before and after gold plating.

[0031] Figure 5 The diagram shows the working operation of a gold-plated diamond anvil cell.

[0032] Figure 6 This is a cross-sectional view of a diamond anvil cell in operation without gold plating.

[0033] Figure 7 This is a cross-sectional view of a gold-plated diamond anvil cell in operation.

[0034] Figure Labels

[0035] 1. Upper anvil; 2. Lower anvil; 3. Metal gasket; 4. Gold plating layer; 5. Pressure transmitting medium; 6. Constant pressure medium; 7. Material to be tested. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] The diamond anvil cell used in the embodiments was manufactured by Beijing Zhongyan Huanke Co., Ltd., model: SI piston cylindrical diamond anvil cell; the high vacuum resistance evaporation coating machine used in the embodiments was manufactured by Beijing Taikeno Technology Co., Ltd., model: ZHD-300; the high temperature resistant double-sided adhesive used in the embodiments was manufactured by Shenzhen Xinshi Packaging Materials Co., Ltd., model: 3J-7400; the signal measuring instrument used in the embodiments was a confocal Raman spectrometer manufactured by WITec GmbH, Germany, model: Alpha-300 R.

[0038] Example 1

[0039] Combined with appendix Figure 3 The method for improving the signal of two-dimensional material WSe2 on the surface of a diamond anvil cell according to embodiments of the present invention includes the following steps:

[0040] Step 1: Transfer the monolayer two-dimensional material WSe2 onto the surface of the diamond anvil cell using a dry transfer method;

[0041] Step 2: Attach the diamond anvil cell base with the material to be tested onto the gold-plated plate and place it upside down in the high vacuum evaporation coating instrument;

[0042] Step 3: Turn on the high-vacuum evaporation coating instrument. Evaporate a 1000nm thick gold coating layer onto the surface of the material to be tested and the diamond anvil cell containing the material. The vacuum level should be maintained at 1*10⁻⁶ throughout the gold coating process. -5Pa, gold plating rate of 2nm / s, and stand for 12 hours after gold plating;

[0043] Step 4: Assemble the gold-plated diamond anvil cells. Fix the upper and lower anvil cells to the center of the upper and lower piston cylinders respectively with screws. Under a microscope, adjust the direction of the anvil fixing screws to ensure the surfaces of the upper and lower anvil cells are completely aligned. Then, assemble a metal gasket on the surface of the diamond anvil cell containing the material to be tested. The metal gasket has a through hole in its center, located at the center of the lower and upper anvil cells. The through hole is filled with a pressure-transmitting medium, which is silicone oil. A pressure-regulating medium, which is ruby, is also assembled inside the through hole. The ruby ​​particles are immersed in the silicone oil. Then, assemble the pressure screws, clamping the metal gasket between the upper and lower anvil cells.

[0044] Step 5: Signal Measurement. A double-sided measurement method is used, with signal measurement performed on the side containing the pressure-transmitting medium to determine the pressure magnitude of the device. The diamond anvil cell is then flipped, and Raman spectrometry is used to test the Raman and fluorescence spectra in the WSe2 region. The results are as follows: Figure 3 (c) and Figure 3 As shown in (d); when the pressure was increased to a certain level (5.2 GPa), the fluorescence spectral signal in the WSe2 region was measured, and the results were as follows: Figure 3 As shown in (e), no interference fringes appear in the measurement signal graph.

[0045] By comparison Figure 3 (c) and Figure 3 (d) The Raman and fluorescence spectra of the materials before and after gold plating show that the Raman and fluorescence signals of the materials after gold plating are significantly stronger than those before gold plating, and more measurement signal details can be displayed. This proves that the method of the present invention can effectively solve the problem of no reflection signal or weak signal of two-dimensional materials on transparent diamond substrates, and the effect is significant.

[0046] By comparison Figure 3 (e) The fluorescence spectra of the materials before and after gold plating reveal that when the pressure of the diamond anvil cell is increased to a certain level, obvious interference fringes appear in the WSe2 fluorescence spectrum measurement signal without gold plating, while no interference fringes appear in the WSe2 fluorescence spectrum measurement signal after gold plating. This is because the presence of the nano-gold layer prevents the laser from passing through the gap between the material and the pressure-transmitting medium, causing the interference fringes to disappear. This demonstrates that the method of the present invention can effectively solve the problem of light wave interference that occurs during the measurement process of the diamond anvil cell, and the effect is significant.

[0047] Comparative Example 1

[0048] Step 1: Transfer the monolayer two-dimensional material WSe2 onto the surface of the diamond anvil cell using a dry transfer method;

[0049] Step 2: Assemble the diamond anvil cells. Fix the upper and lower anvil cells to the center of the upper and lower piston cylinders respectively using screws. Under a microscope, adjust the direction of the anvil fixing screws to ensure complete alignment of the surfaces of the upper and lower anvil cells. Then, assemble a metal gasket onto the surface of the diamond anvil cells containing the material to be tested. The metal gasket has a through hole in its center, located at the center of the lower and upper anvil cells. The through hole is filled with a pressure-transmitting medium, which is silicone oil. A pressure-regulating medium, which is ruby, is also assembled into the through hole. The ruby ​​particles are immersed in the silicone oil. Then, assemble the pressure screws, clamping the metal gasket between the upper and lower anvil cells.

[0050] Step 3: Measure the signal.

[0051] Optical images such as Figure 3 As shown in (a); Raman spectrometry was used to test the Raman and fluorescence spectroscopic signals in the WSe2 region, and the signal results are in... Figure 3 (c) and Figure 3 As shown in (d); when the pressure is increased to a certain level (5.2 GPa), the fluorescence spectral signal in the WSe2 region is measured, and the results are as follows: Figure 3 As shown in (e), obvious interference fringes appear in the measurement signal graph.

[0052] Example 2

[0053] Combined with appendix Figure 4 The method for improving the signal of two-dimensional material WSe2 / MoS2 heterojunction on the surface of diamond anvil cell according to embodiments of the present invention includes the following steps:

[0054] Step 1: A two-dimensional monolayer WSe2 / MoS2 heterojunction was transferred to the surface of a diamond anvil cell using a dry transfer method. Optical images are shown below. Figure 4 As shown in (a), the Raman and fluorescence spectra of the WSe2 / MoS2 heterojunction region were measured using a Raman spectrometer, and the results are as follows. Figure 4 (c) and Figure 4 As shown in (d);

[0055] Step 2: Attach the diamond anvil cell base with the material to be tested onto the gold-plated plate and place it upside down in the high vacuum evaporation coating instrument;

[0056] Step 3: Turn on the high-vacuum evaporation coating instrument. Evaporate a 1000nm thick gold coating layer onto the surface of the material to be tested and the diamond anvil cell containing the material. Maintain a vacuum level of 1*10⁻⁶ throughout the gold coating process. -5 Pa, gold plating rate of 2nm / s, and stand for 12 hours after gold plating;

[0057] Step 4: Assemble the gold-plated diamond anvil cells. Fix the upper and lower anvil cells to the center of the upper and lower piston cylinders respectively with screws. Under a microscope, adjust the direction of the anvil fixing screws to ensure the surfaces of the upper and lower anvil cells are completely aligned. Then, assemble a metal gasket on the surface of the diamond anvil cell containing the material to be tested. The metal gasket has a through hole in its center, located at the center of the lower and upper anvil cells. The through hole is filled with a pressure-transmitting medium, which is silicone oil. A pressure-regulating medium, which is ruby, is also assembled inside the through hole. The ruby ​​particles are immersed in the silicone oil. Then, assemble the pressure screws, clamping the metal gasket between the upper and lower anvil cells.

[0058] Step 5: Signal Measurement. A double-sided measurement method was used, with signal measurement performed on the side containing the pressure-transmitting medium to determine the pressure of the device. The diamond anvil cell was then flipped over, and Raman spectroscopy was used to test the Raman and fluorescence spectra of the WSe2 / MoS2 heterojunction region. The results are as follows: Figure 4 (c) and Figure 4 As shown in (d);

[0059] By comparison Figure 4 (c) and Figure 4 (d) The Raman and fluorescence spectra of the materials before and after gold plating show that the Raman and fluorescence signal in the heterojunction region of the two-dimensional material after gold plating is significantly stronger than that before gold plating, and more measurement signal details can be displayed. This proves that the method of the present invention can effectively solve the problem of no reflection signal or weak signal of two-dimensional materials on transparent diamond substrates, and the effect is significant.

Claims

1. An improved measurement signal device for two-dimensional materials on a diamond anvil cell, comprising an upper anvil (1), a lower anvil (2), a metal pad (3), and a gold plating layer (4), wherein a material to be measured (7) is arranged in the center of the surface of the upper anvil (1) or the lower anvil (2), the material to be measured (7) being a two-dimensional material or a heterojunction, and a gold plating film is provided on the surface of the diamond anvil cell on which the material to be measured (7) is arranged and on the surface of the material to be measured (7); the surfaces of the upper and lower anvil cells are completely aligned, the metal pad (3) is clamped between the upper and lower anvil cells, a through hole is opened in the center of the metal pad (3), the through hole is located in the center of the lower anvil (2) and the upper anvil (1), the through hole is filled with a pressure transmitting medium (5), and a constant pressure medium (6) is assembled in the through hole, characterized in that: The specific application includes the following steps. S1, transfer two-dimensional material or heterojunction to the surface of the upper anvil (1) or lower anvil (2) of a diamond anvil cell; S2, fix the diamond anvil base with the material to be tested (7) on the gold plate and place it upside down in the high vacuum evaporation coating instrument; S3, turn on the high vacuum evaporation coating instrument and deposit a gold layer (4) with a thickness of 800-1200nm on the diamond anvil surface with the test material (7). S4, assemble diamond anvils; the upper and lower anvils are respectively fixed to the center of the upper and lower piston cylinders by screws, the metal gasket (3) is clamped between the upper and lower anvils, the metal gasket (3) has a through hole in the center, the through hole is located in the center of the lower anvil (2) and the upper anvil (1), the through hole is filled with pressure transmission medium (5), and the through hole is equipped with constant pressure medium (6). S5, the double-sided measurement method is used to measure the signal; the signal is measured on the side with the pressure transmission medium (5) to determine the pressure of the device; the diamond anvil is flipped over to measure the sample property signal.

2. The application of the improved two-dimensional material measurement signal device on a diamond anvil cell as described in claim 1, characterized in that: In S1, two-dimensional materials or heterojunctions are transferred to the surface of a diamond anvil cell using a two-dimensional material transfer platform, and the transfer is performed using either a wet transfer method or a dry transfer method.

3. The application of the improved two-dimensional material measurement signal device on a diamond anvil cell as described in claim 1, characterized in that: In S2, the diamond anvil cell base with the test material (7) is attached to the gold plate using high-temperature resistant double-sided adhesive.

4. The application of the improved two-dimensional material measurement signal device on a diamond anvil cell as described in claim 1, characterized in that: In step S3, the vacuum degree of the high vacuum evaporation coating instrument should be less than 1*10^-5 Pa, the gold plating rate should be maintained at 0.1nm / s~0.2nm / s, the amount of gold in the evaporation boat should be not less than 0.5g, and the diamond anvil should be left to stand for more than 12 hours after the gold plating is completed.

5. The application of the improved two-dimensional material measurement signal device on a diamond anvil cell as described in claim 1, characterized in that: In S5, the measurement of sample property signals includes Raman signal measurement, fluorescence signal measurement, and reflection signal measurement.

6. The application of the improved two-dimensional material measurement signal device on a diamond anvil cell as described in claim 5, characterized in that: In S5, a Raman spectrometer is used to test the Raman spectral signal and fluorescence spectral signal of the region of the material to be tested (7).

7. The application of the improved two-dimensional material measurement signal device on a diamond anvil cell as described in claim 1, characterized in that: The thickness of the gold plating layer is 1000 nm.

8. The application of the improved two-dimensional material measurement signal device on a diamond anvil cell as described in claim 1, characterized in that: The pressure transmission medium (5) is a mixture of silicone oil and ethanol, and the constant pressure medium (6) is ruby.

9. The application of an improved two-dimensional material measurement signal device on a diamond anvil cell as described in any one of claims 1, 7, or 8, characterized in that: The diamond anvil is a piston-cylinder type diamond anvil, which also includes an upper piston cylinder, a lower piston cylinder and a pressure screw. The upper and lower anvils are respectively fixed to the center of the upper and lower piston cylinders by screws, and the upper and lower piston cylinders are fixed together by the pressure screw.

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