A perylene imide derivative nanofiber, a preparation method thereof, and application thereof in an ammonia gas detection sensor
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HENAN INST OF ENG
- Filing Date
- 2026-03-17
- Publication Date
- 2026-06-09
AI Technical Summary
Existing ammonia sensors have high detection limits, which are not conducive to the detection of low concentrations, and poor selectivity, which limits their practical applications.
Perylene imide derivative nanofibers were used as the sensing material. The nanofibers were prepared by molecular self-assembly and an electrode circuit was constructed on a high-temperature resistant thin film substrate to form a resistive ammonia gas sensor.
It achieves low detection limit and high selectivity, with a detection sensitivity of up to 28.58 nA/ppm for ammonia. The sensor is portable, easy to operate, and has good long-term stability.
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Figure CN122169248A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of organic compound gas detection technology, and relates to a perylene imide derivative nanofiber, its preparation method, and its application in an ammonia detection sensor. Specifically, it relates to a method for preparing a perylene imide derivative nanofiber with high selectivity and high response characteristics to ammonia and its application in an ammonia detection sensor. Background Technology
[0002] Ammonia is a harmful gas with a strong, pungent odor that poses certain health risks to humans. As people's living standards improve, the health risks associated with ammonia are receiving increasing attention. In recent years, its environmental damage has become immeasurable. Leaks can pollute air, water, and soil, severely impacting the ecological balance and contributing to the formation of PM2.5 and acid rain, further exacerbating environmental pollution. Regarding safety hazards, when ammonia mixes with air and reaches a certain concentration (15.7%-27.4%), it is prone to explosion upon contact with an open flame, posing safety risks in industrial sites (such as fertilizer plants and cold storage facilities). Therefore, the research and development of ammonia detection technology is becoming increasingly important. Currently, in the research of ammonia sensors, improving sensor sensitivity and long-term stability are key issues that need to be addressed.
[0003] To date, various analytical methods exist for detecting ammonia. Among these, electrical response sensors are a simple, inexpensive method with advantages such as wide linear detection range, low detection limit, high speed, and high sensitivity. Perylene imide derivatives are excellent semiconductor materials. Their molecules possess a large π-conjugated system, allowing for the controlled assembly of various nanomaterial forms. Furthermore, perylene imide derivatives exhibit electron-deficient structures, making them highly sensitive to electron-donating amine gases and suitable as sensors for these gases. For example, patent CN114324497A discloses a polyaniline nanocomposite material and its preparation and application methods. This method achieves a room-temperature response to ammonia by controlling the interaction between N,N'-di(carboxyethyl)-1,7-dinitro-3,4,9,10-perylene imide and polyaniline. However, this method suffers from complex preparation processes, high costs, and poor solubility of polyaniline. Despite significant progress in perylene imide derivative gas sensors over the years, they still suffer from the following shortcomings: ① high detection limits, which are unfavorable for detecting low concentrations; ② poor selectivity, which limits practical applications. Therefore, further development of sensors with low detection limits and high selectivity has become an urgent problem to be solved. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a perylene imide derivative nanofiber, its preparation method, and its application in an ammonia detection sensor, enabling efficient and accurate ammonia detection.
[0005] To achieve the above objectives, the first objective of this invention is to provide a method for preparing perylene imide derivative nanofibers, wherein PDI-S is assembled in a mixture of water and anhydrous ethanol to obtain perylene imide derivative nanofibers.
[0006] Preferably, the concentration of PDI-S in the mixture is 0.1-0.4 mg / mL, and the volume ratio of water to anhydrous ethanol is 1:1-4.
[0007] Preferably, the assembly temperature is between 25 and 50 °C.
[0008] Preferably, the preparation method of PDI-S is as follows: 3,4,9,10 perylenetetracarboxylic dianhydride and DMSO (dimethyl sulfoxide) are added to a 100 mL three-necked flask and placed in an oil bath. Separately, 3-aminopropanesulfonic acid and potassium hydroxide are dissolved in deionized water and stirred until dissolved. The solution is then added to a constant pressure dropping funnel. The three-necked flask is then refluxed and stirred at 90-110 °C. During the reaction, the mixture in the constant pressure dropping funnel is added dropwise to the apparatus. The sample is added completely in 0.5-1 h. After complete addition, the reaction is allowed to proceed for 5-10 h. After the reaction is complete, anhydrous ethanol is added, stirred, filtered, and purified to obtain PDI-S.
[0009] Preferably, the chemical name of the PDI-S is N,N-bis(3-sulfonopropyl)-3,4,9,10-perylenediimide, and its chemical structural formula is as follows:
[0010] .
[0011] Preferably, the PDI-S nanofibers are collected and dispersed in anhydrous ethanol (1-3 mg / mL) for later use.
[0012] By employing the above technical solution, nanofibers can be prepared through self-assembly between molecules. This allows for the effective utilization of intermolecular and intramolecular interactions to regulate the molecular arrangement within the nanofibers, thereby enabling the control of electron transport capabilities.
[0013] A second objective of this invention is to provide perylene imide derivative nanofibers prepared by the above method.
[0014] A third objective of this invention is to provide the application of the above-mentioned perylene imide derivative nanofibers in an ammonia detection sensor, wherein the sensor comprises a high-temperature resistant thin film substrate having circuitry and a sensitive material, the high-temperature resistant thin film substrate containing electrode circuitry, and the sensitive material being perylene imide derivative nanofibers deposited on the electrode circuitry.
[0015] Preferably, the method for manufacturing the sensor includes the following steps:
[0016] S1: Using a mask, gold circuits are fabricated on a high-temperature resistant thin film substrate by magnetron sputtering to obtain electrode circuits;
[0017] S2: Disperse perylene imide derivative nanofibers in an ethanol solution to obtain a suspension with a mass fraction of 1-3 mg / mL;
[0018] S3: Drop 5-10 μL of the suspension prepared in step S2 onto the surface of the electrode circuit and let it dry for later use.
[0019] Preferably, the high-temperature resistant film substrate is polyethylene naphthalate or polyimide film.
[0020] Preferably, the electrode circuit is an interdigitated circuit with a wire width of 100-200 μm and a wire spacing of 50-100 μm.
[0021] The beneficial effects of this invention are:
[0022] (1) This invention constructs a resistive ammonia sensor using perylene imide-derived bio-nanofibers, an organic electron-deficient material. The sensor prepared by this invention has advantages such as low detection limit, high response, and portability.
[0023] (2) Nanofiber sensors are prepared by controlling the morphology of nanofibers through weak intermolecular interactions, which makes it easier to expose more specific surface area and improves the performance of the sensor. The detection sensitivity of ammonia is as high as 28.58 nA / ppm.
[0024] (3) The flexible ammonia sensor provided by the present invention is controllable in operation, small in size and easy to carry, highly sensitive and outstanding in comprehensive performance, and can achieve stable detection for a long time. Attached Figure Description
[0025] Figure 1 The image shows the NMR spectrum of the PDI-S obtained in Example 1 of this invention.
[0026] Figure 2 This is a scanning electron microscope image of the PDI-S nanofibers prepared in Example 1 of the present invention.
[0027] Figure 3 This is a schematic diagram of the electrode circuit obtained in Embodiment 1 of the present invention.
[0028] Figure 4 The left figure shows the response curve of the sensor to different concentrations of ammonia in Embodiment 1 of the present invention, and the right figure shows the standard curve.
[0029] Figure 5 This is a scanning electron microscope image of the PDI-S nanofibers prepared in Example 2 of the present invention.
[0030] Figure 6The left figure shows the response curve of the sensor to different concentrations of ammonia in Embodiment 2 of the present invention, and the right figure shows the standard curve.
[0031] Figure 7 This is a comparison of the response current of the sensor in Example 5 of the present invention and the sensor in Example 1 to 25 ppm ammonia.
[0032] Figure 8 This is a comparison of the response current of the sensor in Example 6 of the present invention and the sensor in Example 1 to 25 ppm ammonia. Detailed Implementation
[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0034] Unless otherwise specified, the experimental methods used in the following experimental examples are conventional methods; the materials and reagents used are commercially available unless otherwise specified.
[0035] This invention provides a method for preparing an electrochemical sensor, the specific steps of which are as follows:
[0036] (1) Preparation of PDI-S
[0037] 3,4,9,10 perylenetetracarboxylic acid dianhydride was added to a DMSO (dimethyl sulfoxide) solution, followed by the addition of a potassium hydroxide solution containing 3-aminopropanesulfonic acid. After the reaction, anhydrous ethanol was added and the mixture was filtered to obtain compound PDI-S, the molecular formula of which is shown in the figure below.
[0038] ;
[0039] (2) Preparation of PDI-S nanofibers
[0040] The PDI-S obtained in step (1) is prepared into an aqueous solution. A certain amount of the aqueous solution is mixed with ethanol and allowed to stand to obtain PDI-S nanofibers. This method realizes the preparation of nanofibers through the self-assembly between molecules. It can effectively utilize the interactions between molecules and within molecules to regulate the molecular arrangement within the nanofibers, thereby achieving the regulation of electron transport capacity.
[0041] Take 0.5 mL of 0.5 mg / mL PDI-S aqueous solution and place it in a brown opaque glass bottle. Add 0.5 mL of deionized water and 4 mL of anhydrous ethanol, shake for 1 min to make the ratio of water to ethanol 1:4. Then place it in a constant temperature oven at 25 ℃ and let it stand to obtain reddish-brown flocculent precipitate PDI-S nanofibers.
[0042] (3) Sensor fabrication
[0043] Gold circuits were fabricated on a polyethylene naphthalate film by magnetron sputtering using a mask to obtain electrode circuits, and PDI-S nanofibers were dropped onto the electrodes to obtain a sensor.
[0044] In step (1), 3-aminopropanesulfonic acid and potassium hydroxide are added at a time of 0.5 h, the reaction temperature is 100 ℃, and the reaction time is 10 h.
[0045] In step (2), the PDI-S aqueous solution is 0.5 mg / mL. Take 0.5 mL of 0.5 mg / mL PDI-S aqueous solution and place it in a brown opaque glass bottle. Add 0.5 mL of deionized water and 4 mL of anhydrous ethanol. Shake for 1 min to make the ratio of water to ethanol 1:4. Then place it in a 25 ℃ constant temperature oven and let it stand to obtain reddish-brown flocculent precipitate PDI-S nanofibers. Centrifuge the nanofibers and enrich them in the ethanol solution to obtain a suspension with a mass fraction of 1 mg / mL.
[0046] In step (3), the electrode circuit is an interdigitated circuit with a wire width of 100-200 μm and a wire distance of 50-100 μm. 10 μL of the suspension prepared in step (2) is drop-coated onto the surface of the electrode circuit and dried for later use.
[0047] Example 1
[0048] A method for synthesizing perylene imide derivative nanofibers and preparing an ammonia sensor, the specific steps of which are as follows:
[0049] (1) Synthesis of PDI-S
[0050] 3,4,9,10 perylenetetracarboxylic acid dianhydride (0.506 g) and DMSO (dimethyl sulfoxide, 25 mL) were mixed and added to a 100 mL three-necked flask and placed in an oil bath. Separately, 3-aminopropanesulfonic acid (4.517 g) and potassium hydroxide (1.832 g) were dissolved in 10 mL of deionized water and stirred until dissolved. The solution was then added to a constant pressure dropping funnel. The three-necked flask was then refluxed and heated to 100 °C. After the temperature stabilized at 100 °C, the mixture in the constant pressure dropping funnel was added dropwise to the apparatus. The sample was added completely over 0.5 h. After complete addition, the reaction was allowed to proceed for 10 h. After the reaction was complete and allowed to stand for 3 h, 30 mL of anhydrous ethanol was added, and the mixture was filtered. The filter cake was dried, dissolved in 10 mL of deionized water, and filtered again. The filtrate was then mixed with 30 mL of hydrochloric acid (1 mol / L), stirred, filtered, and dried to obtain N,N-bis(3-sulfonopropyl)-3,4,9,10-perylene diimide (PDI-S) in 47.6% yield. The NMR spectrum of PDI-S is shown below. Figure 1 As shown, this indicates the synthesized compound is essentially free of impurities.
[0051] (2) Preparation of PDI-S nanofibers
[0052] Take 0.5 mL of 1 mg / mL PDI-S aqueous solution and place it in a brown opaque glass bottle. Add 0.5 mL of deionized water and 4 mL of anhydrous ethanol, shake for 1 min, and then place it in a 25 ℃ incubator. After standing for 48 h, a reddish-brown flocculent precipitate (PDI-S nanofibers) is obtained. Its scanning electron microscope image is shown below. Figure 2 As shown. PDI-S nanofibers were collected and dispersed in anhydrous ethanol (1 mg / mL) for later use. The diameter of the PDI-S nanofibers is about 300 nm and the length is about tens of micrometers.
[0053] (3) Sensor fabrication
[0054] Magnetron sputtering was performed on a cleaned polyethylene naphthalate (PEG) film using a mask. First, a 20 nm thick layer of Cr metal was sputtered, followed by a 100 nm thick layer of gold as the conductive lines. The electrode circuit was an interdigitated circuit with a conductor width of 100 μm and a conductor spacing of 100 μm. The electrode circuit is as follows: Figure 3 As shown. 5 μL of 1 mg / mL PDI-S nanofibers was dropped onto the electrode surface and dried to obtain the sensor. The sensor detection results are shown below. Figure 4 As shown. The sensor responds to ammonia concentrations of 5 ppm, 10 ppm, 15 ppm, 20 ppm, and 25 ppm, with response currents as follows. Figure 4 As shown, the sensitivity reaches 28.58 nA / ppm.
[0055] Example 2
[0056] 3,4,9,10 perylenetetracarboxylic acid dianhydride (0.506 g) and DMSO (dimethyl sulfoxide, 25 mL) were mixed and added to a 100 mL three-necked flask and placed in an oil bath. Separately, 3-aminopropanesulfonic acid (4.517 g) and potassium hydroxide (1.832 g) were dissolved in 10 mL of deionized water and stirred until dissolved. The solution was then added to a constant pressure dropping funnel. The three-necked flask was then refluxed and heated to 100 °C. After the temperature stabilized at 100 °C, the mixture in the constant pressure dropping funnel was added dropwise to the apparatus. The sample was added completely over 0.5 h. After complete addition, the reaction was allowed to proceed for 10 h. After the reaction was completed and allowed to stand for 3 h, 30 mL of anhydrous ethanol was added, and the mixture was filtered. The filter cake was dried and dissolved in 10 mL of deionized water and filtered. The filtrate was then mixed with 30 mL of hydrochloric acid (1 mol / L), stirred, filtered, and dried to obtain N,N-bis(3-sulfonylpropyl)-3,4,9,10-perylene diimide (PDI-S) with a yield of 47.6%.
[0057] (2) Preparation of PDI-S nanofibers
[0058] Take 0.5 mL of 1 mg / mL PDI-S aqueous solution and place it in a brown opaque glass bottle. Add 2 mL of deionized water and 2.5 mL of anhydrous ethanol, shake for 1 min, and then place in a 25 ℃ incubator. After standing for 48 h, a small amount of reddish-brown flocculent precipitate (PDI-S nanofibers) is obtained. The scanning electron microscope image is shown below. Figure 5 As shown. PDI-S nanofibers were collected and dispersed in anhydrous ethanol (1 mg / mL) for later use. The diameter of the PDI-S nanofibers is about 700 nm and the length is about ten micrometers.
[0059] (3) Sensor fabrication
[0060] Magnetron sputtering was performed on a cleaned polyethylene naphthalate (PEG) film using a mask. First, a 20 nm thick layer of Cr metal was sputtered, followed by a 100 nm thick layer of gold as the conductive lines. The electrode circuit was an interdigitated circuit with a conductor width of 100 μm and a conductor spacing of 100 μm. The electrode circuit is as follows: Figure 3 As shown. 5 μL of 1 mg / mL PDI-S nanofibers was dropped onto the electrode surface and dried to obtain the sensor. The sensor detection results are shown below. Figure 6 As shown. The sensor responds to ammonia concentrations of 5 ppm, 10 ppm, 15 ppm, 20 ppm, and 35 ppm, with response currents as follows. Figure 6 As shown, the sensitivity reaches 18.33 nA / ppm.
[0061] Example 3
[0062] This embodiment provides a method for synthesizing the perylene imide derivative PDI-S, which is prepared according to the following steps:
[0063] 3,4,9,10 perylenetetracarboxylic acid dianhydride (0.506 g) and DMSO (dimethyl sulfoxide, 25 mL) were mixed and added to a 100 mL three-necked flask and placed in an oil bath. Separately, 3-aminopropanesulfonic acid (4.517 g) and potassium hydroxide (1.832 g) were dissolved in 10 mL of deionized water and stirred until dissolved. The solution was then added to a constant pressure dropping funnel. The three-necked flask was then refluxed and heated to 100 °C. After the temperature stabilized at 100 °C, the mixture in the constant pressure dropping funnel was added dropwise to the apparatus. The sample was added completely in 0.5 h. After complete addition, the reaction was allowed to proceed for 5 h. After the reaction was completed and allowed to stand for 3 h, 30 mL of anhydrous ethanol was added, and the mixture was filtered. The filter cake was dried and dissolved in 10 mL of deionized water and filtered. The filtrate was then mixed with 30 mL of hydrochloric acid (1 mol / L), stirred, filtered, and dried to obtain N,N-bis(3-sulfonylpropyl)-3,4,9,10-perylene diimide (PDI-S) with a yield of 30.12%.
[0064] Example 4
[0065] This embodiment provides a method for synthesizing the perylene imide derivative PDI-S, which is prepared according to the following steps:
[0066] 3,4,9,10 perylenetetracarboxylic acid dianhydride (0.506 g) and DMSO (dimethyl sulfoxide, 25 mL) were mixed and added to a 100 mL three-necked flask and placed in an oil bath. Separately, 3-aminopropanesulfonic acid (4.517 g) and potassium hydroxide (1.832 g) were dissolved in 10 mL of deionized water and stirred until dissolved. The solution was then added to a constant pressure dropping funnel. The three-necked flask was then refluxed and heated to 90 °C. After the temperature stabilized at 90 °C, the mixture in the constant pressure dropping funnel was added dropwise to the apparatus. The sample was added completely in 0.5 h. After the addition was complete, the reaction was allowed to proceed for 5 h. After the reaction was completed and allowed to stand for 3 h, 30 mL of anhydrous ethanol was added, and the mixture was filtered. The filter cake was dried and dissolved in 10 mL of deionized water and filtered. The filtrate was then mixed with 30 mL of hydrochloric acid (1 mol / L), stirred, filtered, and dried to obtain N,N-bis(3-sulfonylpropyl)-3,4,9,10-perylene diimide (PDI-S) with a yield of 29.76%.
[0067] Example 5
[0068] This embodiment provides a method for preparing PDI-S nanofibers and an ammonia sensor. The specific steps are as follows:
[0069] (1) Preparation of PDI-S nanofibers
[0070] Take 0.5 mL of 1 mg / mL PDI-S aqueous solution and place it in a brown opaque glass bottle. Add 0.5 mL of deionized water and 4 mL of anhydrous ethanol, shake for 1 min, and then place it in a 25 ℃ incubator. After standing for 48 h, a reddish-brown flocculent precipitate (PDI-S nanofibers) is obtained. Collect and disperse the PDI-S nanofibers in anhydrous ethanol (1 mg / mL) for later use.
[0071] (2) Sensor fabrication
[0072] Magnetron sputtering was performed on a cleaned polyethylene naphthalate (PEG) film using a mask. First, a 20 nm thick layer of Cr metal was sputtered, followed by a 100 nm thick layer of gold as the conductive lines. The electrode circuit was an interdigitated circuit with a conductor width of 100 μm and a conductor spacing of 100 μm. The electrode circuit is as follows: Figure 3 As shown. 5 μL of 3 mg / mL PDI-S nanofibers was dropped onto the electrode surface and dried to obtain the sensor. The sensor's detection results for 25 ppm ammonia are shown below. Figure 7 As shown, there was no significant change in detection performance compared to Example 1, indicating that increasing the mass concentration of nanofibers had no significant effect on performance improvement.
[0073] Example 6
[0074] This embodiment provides a method for preparing PDI-S nanofibers and an ammonia sensor. The specific steps are as follows:
[0075] (1) Preparation of PDI-S nanofibers
[0076] Take 0.5 mL of 1 mg / mL PDI-S aqueous solution and place it in a brown opaque glass bottle. Add 0.5 mL of deionized water and 4 mL of anhydrous ethanol, shake for 1 min, and then place it in a 25 ℃ incubator. After standing for 48 h, a reddish-brown flocculent precipitate (PDI-S nanofibers) is obtained. Collect and disperse the PDI-S nanofibers in anhydrous ethanol (1 mg / mL) for later use.
[0077] (2) Sensor fabrication
[0078] Magnetron sputtering was performed on a cleaned polyethylene naphthalate (PEG) film using a mask. First, a 20 nm thick layer of Cr metal was sputtered, followed by a 100 nm thick layer of gold as the conductive lines. The electrode circuit was an interdigitated circuit with a conductor width of 100 μm and a conductor spacing of 100 μm. The electrode circuit is as follows: Figure 3 As shown. 10 μL of 1 mg / mL PDI-S nanofibers was dropped onto the electrode surface and dried to obtain the sensor. The sensor's detection results for 25 ppm ammonia are as follows. Figure 8As shown, there was no significant change in detection performance compared to Example 1, indicating that increasing the amount of nanofibers had no significant effect on performance improvement.
[0079] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.
[0080] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A method for preparing perylene imide derivative nanofibers, characterized in that, PDI-S was assembled in a mixture of water and anhydrous ethanol to obtain perylene imide derivative nanofibers.
2. The method for preparing perylene imide derivative nanofibers as described in claim 1, characterized in that, The concentration of PDI-S in the mixture is 0.1-0.4 mg / mL, and the volume ratio of water to anhydrous ethanol is 1:1-4.
3. The method for preparing perylene imide derivative nanofibers as described in claim 2, characterized in that, The assembly temperature is between 25 and 50 °C.
4. The method for preparing perylene imide derivative nanofibers as described in claim 3, characterized in that, The specific preparation method of PDI-S is as follows: 3,4,9,10 perylenetetracarboxylic dianhydride and DMSO are added to a 100 mL three-necked flask and placed in an oil bath. Separately, 3-aminopropanesulfonic acid and potassium hydroxide are dissolved in deionized water and stirred until dissolved. The solution is then added to a constant pressure dropping funnel. The three-necked flask is then refluxed and stirred at 90-110 °C. During the reaction, the mixture in the constant pressure dropping funnel is added dropwise to the apparatus. The sample is added completely in 0.5-1 h. After complete addition, the reaction is allowed to proceed for 5-10 h. After the reaction is complete, anhydrous ethanol is added, stirred, filtered, and purified to obtain PDI-S.
5. The method for preparing perylene imide derivative nanofibers as described in claim 4, characterized in that, The chemical name of the PDI-S is N,N-bis(3-sulfonopropyl)-3,4,9,10-perylene diimide, and its chemical structural formula is as follows: 。 6. Perylene imide derivative nanofibers prepared by the method according to any one of claims 1-5.
7. The application of perylene imide derivative nanofibers as described in claim 6 in an ammonia detection sensor, characterized in that, The sensor includes a high-temperature resistant thin film substrate with circuitry and a sensitive material. The high-temperature resistant thin film substrate contains electrode circuitry, and the sensitive material is perylene imide derivative nanofibers deposited on the electrode circuitry.
8. The application of the perylene imide derivative nanofiber as described in claim 7 in an ammonia detection sensor, characterized in that, The method for preparing the sensor includes the following steps: S1: Using a mask, gold circuits are fabricated on a high-temperature resistant thin film substrate by magnetron sputtering to obtain electrode circuits; S2: Disperse perylene imide derivative nanofibers in an ethanol solution to obtain a suspension with a mass fraction of 1-3 mg / mL; S3: Drop 5-10 μL of the suspension prepared in step S2 onto the surface of the electrode circuit and let it dry for later use.
9. The application of perylene imide derivative nanofibers as described in claim 8 in an ammonia detection sensor, characterized in that, The high-temperature resistant film substrate is polyethylene naphthalate or polyimide film.
10. The application of perylene imide derivative nanofibers as described in claim 9 in an ammonia detection sensor, characterized in that, The electrode circuit is an interdigitated circuit with a wire width of 100-200 μm and a wire spacing of 50-100 μm.