Device for preparing molybdenum oxide nanosheet surface enhanced Raman scattering substrate

Abstract

The invention discloses a device for preparing a molybdenum oxide nanosheet surface enhanced Raman scattering substrate, and relates to the technical field of molecular detection. The device comprises a quartz tube, a crucible and a substrate are arranged in the quartz tube, a rotating mechanism is arranged in the quartz tube and used for controlling the crucible and the substrate to move, connecting pieces are arranged at the two ends of the quartz tube, clamping mechanisms are arranged at the two ends of the quartz tube and used for fixing the connecting pieces, and a movable heating ring is arranged outside the quartz tube. And the movable heating ring is provided with a power supply connecting piece connected with an external power supply. Through the rotating mechanism, the crucible and the substrate can easily move in the quartz tube. The molybdenum oxide powder can be conveniently placed and taken out, the working efficiency is remarkably improved, time and energy consumption in the operation process is reduced, the bevel gear is driven by the handle to rotate, then the two-way threaded rod is controlled, and accurate control over the positions of the crucible and the substrate is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of molecular detection, and in particular, relates to a device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets. Background Art

[0002] Surface Raman enhanced scattering (SERS) can be used for highly sensitive molecular detection, while the traditional enhancement substrate is a nanomaterial represented by precious metals such as Au and Ag, which has excellent enhancement performance, but the material is expensive, greatly increasing the cost. On the other hand, to achieve high-sensitivity enhancement, it is necessary to introduce "hot spots", and it is difficult to prepare "hot spots" in precious metal materials, and it is difficult to ensure uniformity and stability, so there are huge difficulties in application.

[0003] After searching, Chinese patent number CN210322798U discloses a device for preparing surface enhanced Raman scattering substrate of molybdenum oxide nanosheets, including a quartz tube, a mobile heating ring movably mounted on the outer wall of the quartz tube, a crucible placed inside the quartz tube for carrying molybdenum oxide powder, and a substrate placed inside the quartz tube, and a shielding sheet is provided on the top of the crucible; an air inlet connector is provided at one end of the quartz tube, and an air outlet connector is provided at the other end. The vapor deposition device of this patent has a novel structure and is easy to operate and use. It adopts a vapor deposition method, and heats the position of the quartz tube corresponding to the crucible by moving the heating ring to sublime the molybdenum oxide powder, and then removes the mobile heating ring and evacuates the heat source, so that the sublimated molybdenum oxide forms a large area of ​​molybdenum oxide nano-thin layer on the surface of the substrate at a relatively low temperature, and can make the prepared molybdenum oxide nano-thin layer have a high detection limit, good uniformity, and excellent stability;

[0004] However, in actual use of the above patent, when it is necessary to place the molybdenum oxide powder inside the crucible and take out the substrate of the molybdenum oxide nano-thin layer, the staff needs to reach into the inside of the quartz tube to take it out, which is very inconvenient. At the same time, when sealing the two ends of the quartz tube, it is installed only by the cooperation of the internal thread and the external thread, and the sealing is poor. Summary of the invention

[0005] In view of the problems in the related art, the present invention proposes a device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets to overcome the above-mentioned technical problems existing in the existing related art.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention discloses a device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets, comprising a quartz tube, wherein a crucible and a substrate are arranged inside the quartz tube, wherein a rotating mechanism is arranged inside the quartz tube, wherein the rotating mechanism is used to control the movement of the crucible and the substrate, wherein connecting pieces are arranged at both ends of the quartz tube, wherein a clamping mechanism is arranged at both ends of the quartz tube, wherein the clamping mechanism is used to fix the connecting piece, wherein a movable heating ring is arranged outside the quartz tube, wherein the movable heating ring is provided with a power supply connector connected to an external power supply, and wherein a shielding plate is movably installed above the crucible.

[0008] Furthermore, the crucible and the substrate are both slidably connected inside the quartz tube, and the rotating mechanism includes a bidirectional threaded rod arranged inside the quartz tube.

[0009] Furthermore, the bidirectional threaded rod is threadedly connected with a first sliding block and a second sliding block, two first sliding blocks are provided and fixedly installed on both sides of the crucible, and two second sliding blocks are provided and fixedly installed on both sides of the substrate.

[0010] Furthermore, one of the first sliding blocks is threadedly connected to a bidirectional threaded rod, and another of the first sliding blocks is slidably connected to a guide rod, and one of the second sliding blocks is threadedly connected to a bidirectional threaded rod, and another of the second sliding blocks is slidably connected to a guide rod.

[0011] Furthermore, the guide rod is fixedly installed inside the quartz tube, the bidirectional threaded rod is fixedly installed with a first bevel gear, the first bevel gear is rotatably installed inside the quartz tube, the first bevel gear is meshed with a second bevel gear, the second bevel gear is rotatably installed inside the quartz tube, and the second bevel gear is fixedly installed with a handle.

[0012] Furthermore, the clamping mechanism comprises a clamping block arranged inside the quartz tube, and protruding blocks are fixedly installed at both ends of the clamping block, and the protruding blocks are slidably connected to the inside of the quartz tube.

[0013] Furthermore, one end of a return spring is fixedly mounted on the two protruding blocks, the other end of the return spring is fixedly mounted inside the quartz tube, and the clamping block is clamped inside the clamping hole.

[0014] Furthermore, the clamping hole is formed on the sealing plug, the sealing plug is fixedly mounted on the connecting piece, and the connecting piece is fixedly mounted with a fixing piece.

[0015] Furthermore, the sealing plug, the connecting piece and the fixing piece are all provided with air holes and are interconnected, the air holes are connected to the air intake pipe, and the air intake pipe is fixedly mounted on the fixing piece.

[0016] Furthermore, the power connection piece is fixedly mounted on the mobile heating coil, and insulating rubber handles are fixedly mounted on both ends of the mobile heating coil.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention uses a rotating mechanism to enable the crucible and substrate to be easily moved inside the quartz tube. This not only facilitates the placement and removal of molybdenum oxide powder, but also significantly improves work efficiency and reduces time and energy consumption during operation. At the same time, the handle drives the bevel gear to rotate, thereby controlling the bidirectional threaded rod, thereby achieving precise control of the position of the crucible and substrate, and enhancing the convenience and accuracy of operation.

[0019] 2. The present invention achieves effective fixation of the connector through the clever coordination of the block and the hole, as well as the elastic deformation of the reset spring, thereby ensuring a sealed environment inside the quartz tube. This design not only ensures the stability and safety of the reaction process, but also allows operators to easily disassemble the connector when necessary, thereby enhancing the flexibility and maintainability of the device.

[0020] 3. The present invention can precisely heat the crucible by moving the heating ring, and at the same time, introduce gas into the quartz tube through the air inlet pipe, which effectively improves the sublimation speed and reaction efficiency of the molybdenum oxide powder. In addition, the design of the power connector allows the heating ring to be easily connected to an external power source, while the insulating rubber handle ensures safety during operation, making the entire heating process both efficient and controllable. These designs jointly promote the high-quality preparation of molybdenum oxide nanosheets and improve the performance and application value of the product.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on the following drawings without creative work.

[0023] Figure 1 The three-dimensional structure of the present invention Figure 1 ;

[0024] Figure 2 The three-dimensional structure of the present invention Figure 2 ;

[0025] Figure 3 It is an enlarged view of point A of the present invention;

[0026] Figure 4 The three-dimensional structure of the present invention Figure 3 ;

[0027] Figure 5 The three-dimensional structure of the present invention Figure 4 ;

[0028] Figure 6 The three-dimensional structure of the present invention Figure 5 .

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Quartz tube; 2. Crucible; 3. Substrate; 4. Power supply connector; 5. Connector; 6. Mobile heating coil; 7. Insulating rubber handle; 8. Bidirectional threaded rod; 9. First sliding block; 10. Second sliding block; 11. Guide rod; 12. First bevel gear; 13. Second bevel gear; 14. Handle; 15. Block; 16. Protrusion; 17. Reset spring; 18. Block hole; 19. Sealing plug; 20. Fixing piece; 21. Air hole; 22. Inlet pipe; 23. Shielding plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0032] In the description of the present invention, it is necessary to understand that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention.

[0033] See also Figure 1-Figure 6 As shown, the present invention is a device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets, comprising a quartz tube 1, a crucible 2 and a substrate 3 are arranged inside the quartz tube 1, a rotating mechanism is arranged inside the quartz tube 1, the rotating mechanism is used to control the movement of the crucible 2 and the substrate 3, connecting pieces 5 are arranged at both ends of the quartz tube 1, a clamping mechanism is arranged at both ends of the quartz tube 1, the clamping mechanism is used to fix the connecting piece 5, a movable heating ring 6 is arranged outside the quartz tube 1, the movable heating ring 6 is provided with a power supply connector 4 connected to an external power supply, and a shielding plate 23 is movably installed above the crucible 2.

[0034] The working principle of the device for preparing the surface enhanced Raman scattering substrate of molybdenum oxide nanosheets proposed in the present invention is to first rotate the rotating mechanism to move the crucible 2 and the substrate 3 to the two ends of the quartz tube 1, then place the molybdenum oxide powder inside the crucible 2, and place the shielding plate 23 on the top of the crucible 2, and finally rotate the rotating mechanism in the opposite direction to move the crucible 2 and the substrate 3 to the middle position of the quartz tube 1, at which time the substrate 3 is located next to the crucible 2.

[0035] It is worth noting that the substrate 3 is one of Si wafer, SiO2 wafer, mica wafer or quartz wafer. The present invention adopts the above-mentioned type of substrate 3, which has high stability and high strength, and can be stably bonded with molybdenum oxide to form a stable base material; more preferably, the substrate 3 is a SiO2 wafer.

[0036] After completing the above operations, the connector 5 is fixedly installed at both ends of the quartz tube 1 through the clamping mechanism, so that the interior of the quartz tube 1 forms a closed environment, and then the mobile heating coil 6 is moved to the outer wall position of the quartz tube 1 corresponding to the crucible 2, and the mobile heating coil 6 is turned on to heat the position of the quartz tube 1 corresponding to the crucible 2, so that the crucible 2 with molybdenum oxide powder placed in the quartz tube 1 is heated to reach the sublimation temperature of the molybdenum oxide powder, so that the molybdenum oxide powder is sublimated into a vapor state, and then the mobile heating coil 6 is moved away, and the crucible 2 position is quickly cooled down, so that the sublimated molybdenum oxide forms a large area and uniform molybdenum oxide nano-thin layer on the surface of the substrate 3 in a relatively low temperature area. After the device is cooled to room temperature, the substrate 3 with the molybdenum oxide nano-thin layer grown on the surface is taken out, and the molybdenum oxide nano-sheet surface enhanced Raman scattering substrate is obtained.

[0037] In one embodiment, for the above-mentioned crucible 2 , the crucible 2 and the substrate 3 are both slidably connected inside the quartz tube 1 , and the rotating mechanism includes a bidirectional threaded rod 8 disposed inside the quartz tube 1 .

[0038] In one embodiment, for the above-mentioned bidirectional threaded rod 8, the bidirectional threaded rod 8 is threadedly connected with a first sliding block 9 and a second sliding block 10, two first sliding blocks 9 are provided and fixedly installed on both sides of the crucible 2, and two second sliding blocks 10 are provided and fixedly installed on both sides of the substrate 3.

[0039] In one embodiment, for the above-mentioned first sliding blocks 9, one of the first sliding blocks 9 is threadedly connected to the bidirectional threaded rod 8, and the other first sliding block 9 is slidably connected to the guide rod 11, and one of the second sliding blocks 10 is threadedly connected to the bidirectional threaded rod 8, and the other second sliding block 10 is slidably connected to the guide rod 11.

[0040] In one embodiment, for the above-mentioned guide rod 11, the guide rod 11 is fixedly installed inside the quartz tube 1, the bidirectional threaded rod 8 is fixedly installed with a first bevel gear 12, the first bevel gear 12 is rotatably installed inside the quartz tube 1, the first bevel gear 12 is meshed with a second bevel gear 13, the second bevel gear 13 is rotatably installed inside the quartz tube 1, and the second bevel gear 13 is fixedly installed with a handle 14.

[0041] The working principle of the device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets proposed in the present invention is that by rotating the handle 14, the second bevel gear 13 is driven to rotate, and then the first bevel gear 12 is driven to rotate, thereby driving the bidirectional threaded rod 8 to rotate, and then driving the first sliding block 9 and the second sliding block 10 to move toward the two ends of the quartz tube 1 respectively, thereby driving the crucible 2 and the substrate 3 to move toward the two ends of the quartz tube 1 respectively, thereby facilitating the placement of molybdenum oxide powder inside the crucible 2, and also facilitating the removal of the substrate 3 of the molybdenum oxide nano-thin layer, thereby improving work efficiency.

[0042] In one embodiment, for the above-mentioned clamping mechanism, the clamping mechanism includes a clamping block 15 disposed inside the quartz tube 1 , and protruding blocks 16 are fixedly installed at both ends of the clamping block 15 , and the protruding blocks 16 are slidably connected inside the quartz tube 1 .

[0043] In one embodiment, for the protruding blocks 16 , one end of a return spring 17 is fixedly mounted on the two protruding blocks 16 , the other end of the return spring 17 is fixedly mounted inside the quartz tube 1 , and the clamping block 15 is clamped inside the clamping hole 18 .

[0044] In one embodiment, for the above-mentioned clamping hole 18 , the clamping hole 18 is opened on the sealing plug 19 , the sealing plug 19 is fixedly installed on the connecting member 5 , and the connecting member 5 is fixedly installed with a fixing member 20 .

[0045] The working principle of the device for preparing the surface enhanced Raman scattering substrate of molybdenum oxide nanosheets proposed by the present invention is that the connecting piece 5 and the sealing plug 19 are moved toward the inside of the quartz tube 1. At this time, the clamping block 15 is subjected to the extrusion force of the sealing plug 19, thereby moving toward the outside of the quartz tube 1, and the reset spring 17 undergoes elastic deformation and maintains a certain tension. When the clamping block 15 overlaps with the clamping hole 18, the reaction force of the reset spring 17 is used to drive the clamping block 15 to be clamped into the inside of the clamping hole 18, thereby completing the fixation of the connecting piece 5, and then forming a sealed environment inside the quartz tube 1.

[0046] When the connecting member 5 needs to be disassembled, the operator only needs to pull the clamping block 15 to release the clamping connection between the clamping block 15 and the clamping hole 18, and then the connecting member 5 can be removed.

[0047] In one embodiment, for the sealing plug 19 , the sealing plug 19 , the connecting member 5 and the fixing member 20 are all provided with air holes 21 and are interconnected. The air holes 21 are connected to the air inlet pipe 22 , and the air inlet pipe 22 is fixedly mounted on the fixing member 20 .

[0048] The working principle of the device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets proposed in the present invention is to heat the position of the quartz tube 1 corresponding to the crucible 2 by turning on the mobile heating ring 6, and at the same time, gas is introduced into the quartz tube 1 through the air inlet pipe 22, so that the crucible 2 with molybdenum oxide powder placed in the quartz tube 1 is heated to reach the sublimation temperature of the molybdenum oxide powder, so that the molybdenum oxide powder is sublimated into a vapor state, thereby accelerating the reaction speed.

[0049] In one embodiment, for the power connector 4 , the power connector 4 is fixedly mounted on the movable heating coil 6 , and insulating rubber handles 7 are fixedly mounted on both ends of the movable heating coil 6 .

[0050] The working principle of the device for preparing the surface enhanced Raman scattering substrate of molybdenum oxide nanosheets proposed by the present invention is that the mobile heating ring 6 can be heated by an external power supply through the power connector 4, and the mobile heating ring 6 can be moved through the insulating rubber handle 7.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The preferred embodiments of the invention disclosed above are only used to help illustrate the invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made based on the content of this specification. This specification selects and specifically describes the embodiments in order to better explain the principles and practical applications of the invention, so that those skilled in the art can better understand and use the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets, comprising a quartz tube (1), characterized in that: A crucible (2) and a substrate (3) are arranged inside the quartz tube (1); a rotating mechanism is arranged inside the quartz tube (1); the rotating mechanism is used to control the movement of the crucible (2) and the substrate (3); connecting pieces (5) are arranged at both ends of the quartz tube (1); a clamping mechanism is arranged at both ends of the quartz tube (1); the clamping mechanism is used to fix the connecting piece (5); a movable heating coil (6) is arranged outside the quartz tube (1); the movable heating coil (6) is provided with a power supply connection piece (4) connected to an external power supply; and a shielding plate (23) is movably installed above the crucible (2).

2. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 1, characterized in that: The crucible (2) and the substrate (3) are both slidably connected inside the quartz tube (1), and the rotating mechanism comprises a bidirectional threaded rod (8) arranged inside the quartz tube (1).

3. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 2, characterized in that: The bidirectional threaded rod (8) is threadedly connected with a first sliding block (9) and a second sliding block (10); two first sliding blocks (9) are provided and fixedly mounted on both sides of the crucible (2); and two second sliding blocks (10) are provided and fixedly mounted on both sides of the substrate (3).

4. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 3, characterized in that: One of the first sliding blocks (9) is threadedly connected to a bidirectional threaded rod (8), and another of the first sliding blocks (9) is slidably connected to a guide rod (11); one of the second sliding blocks (10) is threadedly connected to a bidirectional threaded rod (8), and another of the second sliding blocks (10) is slidably connected to a guide rod (11).

5. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 4, characterized in that: The guide rod (11) is fixedly mounted inside the quartz tube (1); the bidirectional threaded rod (8) is fixedly mounted with a first bevel gear (12); the first bevel gear (12) is rotatably mounted inside the quartz tube (1); the first bevel gear (12) is meshed with a second bevel gear (13); the second bevel gear (13) is rotatably mounted inside the quartz tube (1); and the second bevel gear (13) is fixedly mounted with a handle (14).

6. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 1, characterized in that: The clamping mechanism comprises a clamping block (15) arranged inside the quartz tube (1), protruding blocks (16) are fixedly mounted at both ends of the clamping block (15), and the protruding blocks (16) are slidably connected inside the quartz tube (1).

7. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 6, characterized in that: One end of a return spring (17) is fixedly mounted on the two protruding blocks (16), the other end of the return spring (17) is fixedly mounted inside the quartz tube (1), and the clamping block (15) is clamped inside the clamping hole (18).

8. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 7, characterized in that: The clamping hole (18) is formed on a sealing plug (19), the sealing plug (19) is fixedly mounted on a connecting member (5), and a fixing member (20) is fixedly mounted on the connecting member (5).

9. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 8, characterized in that: The sealing plug (19), the connecting piece (5) and the fixing piece (20) are all provided with air holes (21) and are in communication with each other. The air holes (21) are in communication with an air intake pipe (22), and the air intake pipe (22) is fixedly mounted on the fixing piece (20).

10. The device for preparing a surface enhanced Raman scattering substrate of molybdenum oxide nanosheets according to claim 1, characterized in that: The power connection piece (4) is fixedly mounted on the mobile heating coil (6), and insulating rubber handles (7) are fixedly mounted on both ends of the mobile heating coil (6).

Images