Multi-quantum-dot substrate structure

Abstract

The utility model relates to a multi-quantum-dot substrate structure. The light emitting diode comprises a substrate; the hexagonal close-packed structure layer is arranged on the surface of the substrate and comprises a plurality of PS micro-cone structures which extend to the surface of the substrate, and the heads of the PS micro-cone structures are in sharp convex shapes; and the molecular polymer layer is arranged on the hexagonal close-packed structure layer. By adopting the multi-quantum dot substrate structure, the detection sensitivity of the sensor is effectively improved, and the sensor can more sensitively respond to the change of external pressure through the combination of the hexagonal close-packed structure layer and the molecular polymer layer. Besides, due to the sharp convex shape of the PS micro-cone structure, the surface area of the sensor can be remarkably increased, the structure is beneficial to enhancing the surface effect, the sensor is more sensitive to response of external pressure and deformation, and the detection sensitivity of the sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible sensors, in particular to a multi-quantum dot substrate structure. Background Art

[0002] Flexible sensors have attracted much attention in the field of health monitoring due to their diverse shapes and ability to closely adhere to the human body. Sensors that can accurately monitor the motion state are crucial for the real-time monitoring of patients. Flexible pressure sensors can monitor and identify various human motion signals, including walking, pulse / heart rate, voice, hand movements, and knee movements, and convert these physiological information into visual real-time pulse signals. Mechanical durability, super-conformability, and sensitivity flexibility are key monitoring factors for health electronic skin applications. To improve the sensitivity of flexible pressure sensors, various strategies have been adopted, such as optimizing device and material structures and sensor unit integration. Despite continuous progress in these aspects, the biocompatibility, health, and safety of flexible pressure sensors are often overlooked, which undoubtedly limits the application of electronic skin in actual medical monitoring.

[0003] Although the flexible sensors on the current market have a certain sensitivity, their detection lower limit is still not ideal. This shortcoming limits the application of sensors in more refined and demanding detection tasks. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the utility model is to improve the detection sensitivity of existing flexible sensors.

[0005] To solve the above technical problem, the utility model provides a multi-quantum dot substrate structure, including:

[0006] A substrate;

[0007] A hexagonal close-packed structure layer, disposed on the surface of the substrate, including a plurality of PS microcone structures extending on the surface of the substrate and having a pointed convex head;

[0008] A molecular polymer layer, disposed on the hexagonal close-packed structure layer.

[0009] In an embodiment of the utility model, the substrate adopts a PDMS polymer substrate.

[0010] In an embodiment of the utility model, the thickness of the hexagonal close-packed structure layer is 500 - 1500 μm.

[0011] In an embodiment of the utility model, the arrangement density of the PS microcone structures in the hexagonal close-packed structure layer is 20 - 40 per mm 2 .

[0012] In an embodiment of the present utility model, the thickness of the molecular polymer layer is 50 - 100 nm.

[0013] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0014] For a multi - quantum dot substrate structure of the present utility model, by adopting the multi - quantum dot substrate structure, the detection sensitivity of the sensor is effectively improved. The combination of the hexagonal close - packed structure layer and the molecular polymer layer enables the sensor to respond more acutely to external pressure changes. In addition, due to its convex shape, the PS micro - cone structure can significantly increase the quantum dot density. This structure is beneficial to enhancing the surface effect, making the sensor more sensitive to external pressure and deformation, and improving the detection sensitivity of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model in conjunction with the accompanying drawings.

[0016] Figure 1 is a cross - sectional view of the multi - quantum dot substrate structure of the present utility model.

[0017] Figure 2 is a top - view of the multi - quantum dot substrate structure of the present utility model.

[0018] Description of the reference numerals in the drawings:

[0019] 1. Substrate;

[0020] 2. Hexagonal close - packed structure layer;

[0021] 3. PS micro - cone structure;

[0022] 4. Molecular polymer layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further illustrates the present utility model in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and implement it, but the embodiments given are not intended to limit the present utility model.

[0024] In the present utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of the present utility model, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0025] In the present utility model, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present utility model, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0027] Reference Figure 1 As shown, a multi-quantum dot substrate structure of the utility model includes:

[0028] Substrate 1;

[0029] A hexagonal close-packed structure layer 2 is disposed on the surface of the substrate 1 and includes a plurality of PS micro-cone structures 3 (PS, polystyrene) extending from the surface of the substrate and having pointed convex heads;

[0030] The molecular polymer layer 4 is disposed on the hexagonal close-packed structure layer 2 .

[0031] The hexagonal close-packed structure is an efficient way of utilizing space, which can accommodate more PS micro-cone structures 3 on a limited surface area. The design of the hexagonal close-packed structure layer 2 enables the PS micro-cone structures 3 to be evenly distributed on the sensor surface, which helps to evenly transmit and disperse the force and improve the overall performance and stability of the sensor.

[0032] In addition, the PS microcone structure 3 can significantly increase the density of quantum dots due to its pointed shape. This structure is conducive to enhancing the surface effect and the excitation energy, making the sensor more sensitive to external pressure and deformation. The microcone structure can produce significant changes in electrical signals under slight pressure changes, thereby improving the detection sensitivity of the sensor.

[0033] In one embodiment, the substrate 1 is a PDMS polymer (PDMS, dimethylsiloxane) substrate 1. PDMS polymer has excellent flexibility and biocompatibility, can fit closely to human skin, and is suitable for long-term health monitoring.

[0034] In one embodiment, the thickness of the hexagonal close-packed structure layer 2 is between 500 and 1500 μm.

[0035] In one embodiment, the arrangement density of the PS microcone structures 3 in the hexagonal close-packed structure layer 2 is between 20 and 40 per mm 2 .

[0036] In one embodiment, the thickness of the molecular polymer layer 4 is between 50 and 100 nm.

[0037] The molecular polymer layer 4 can be obtained by reacting a 4-ATP (4-aminothiophenol) solution with a concentration of 5 to 20 μM (micromoles per liter) with a gold coupling agent under acidic conditions. After the reaction, the 4-ATP molecules are adsorbed on the Au surface through Au-S bonds (the 4-ATP molecules form Au-S bonds with the Au surface through their thiol groups (-SH)), forming the molecular polymer layer 4.

[0038] By adopting the multi-quantum dot substrate structure, the detection sensitivity of the sensor is effectively improved. The combination of the hexagonal close-packed structure layer 2 and the molecular polymer layer 4 enables the sensor to respond more sensitively to external pressure changes.

[0039] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A multi-quantum dot substrate structure, characterized in that: include: Substrate (1); A hexagonal close-packed structure layer (2) is arranged on the surface of the substrate (1), comprising a plurality of PS micro-cone structures (3) extending from the surface of the substrate and having pointed convex heads; The molecular polymer layer (4) is arranged on the hexagonal close-packed structure layer (2).

2. A multi-quantum dot substrate structure according to claim 1, characterized in that: The substrate (1) is a PDMS polymer substrate (1).

3. A multi-quantum dot substrate structure according to claim 1, characterized in that: The thickness of the hexagonal close-packed structure layer (2) is between 500 and 1500 μm.

4. A multi-quantum dot substrate structure according to claim 1, characterized in that: The PS micro-cone structure (3) of the hexagonal close-packed structure layer (2) has an arrangement density of 20 to 40 per mm 2 .

5. The multi-quantum dot substrate structure according to claim 1, characterized in that: The thickness of the molecular polymer layer (4) is between 50 and 100 nm.

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