Freeze-thaw enhanced low-energy consumption PEDOT: PSS composite fiber-based artificial synaptic transistor and application thereof

Abstract

The invention provides a freeze-thaw enhanced low-energy PEDOT: PSS composite fiber-based artificial synapse transistor and application thereof.The fiber-based artificial synapse transistor is composed of a source-drain fiber electrode, a grid fiber electrode and an ionic gel electrolyte, the source-drain fiber electrode and the grid fiber electrode are prepared from PEDOT: PSS composite fibers, PEDOT: PSS, an anti-freezing agent and a polymer serve as base materials, and the ionic gel electrolyte is prepared from PEDOT: PSS composite fibers. The anisotropic composite fiber electrode which is high in strength, short in energy dissipation path and stretchable is prepared through freeze-thaw pretreatment and a wet spinning technology. The freeze-thaw enhanced low-energy consumption PEDOT: PSS composite fiber-based artificial synapse transistor provided by the invention is high in switching ratio, high in response rate, low in energy consumption, excellent in synapse plasticity and good in pulse cycle stability, and has a huge application prospect in the fields of brain-computer interfaces, human-computer interaction, smart medical treatment, intelligent electronic fabrics and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial synaptic transistors, and in particular to a freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor and applications thereof. Background Art

[0002] Artificial synaptic transistor devices are a new type of electronic device that can simulate bionic neural synapses to realize the processing and transmission of neural signals and have broad application prospects. At present, the preparation methods of artificial synaptic transistor devices mainly include chemical synthesis, electrochemical deposition and ion implantation. However, traditional preparation methods have problems such as long preparation cycle, high cost, complex equipment and poor stability, which limit their promotion and application in practical applications.

[0003] Organic semiconductor polymer PEDOT:PSS (poly (3,4-ethylenedioxythiophene) / polystyrene sulfonate) is widely used in the field of smart wearable electronic devices and implantable electronic devices due to its excellent biocompatibility and electrical properties. However, the high conductivity of PEDOT:PSS will lead to increased device energy consumption, making it difficult to meet the needs of high-performance synaptic transistors. In addition, the PEDOT:PSS composite fiber electrodes prepared by traditional methods such as immersion and spin coating have poor interface interaction, are easy to peel off, and have poor device electrical stability. Therefore, how to design the composition and structure of PEDOT:PSS composite fibers and prepare fiber-based artificial synaptic transistors with excellent synaptic plasticity, stability and low energy consumption is a current research hotspot and difficulty.

[0004] In view of this, it is necessary to design an improved freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor and its application to solve the above problems. Summary of the invention

[0005] In view of the defects of the above-mentioned prior art, the purpose of the present invention is to provide a freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor and its application, using PEDOT:PSS, antifreeze and polymer as the substrate, and preparing anisotropic composite fiber electrodes with high strength and stretchability through freeze-thaw pretreatment and wet spinning technology. The above-mentioned fiber-based artificial synaptic transistor has high switching ratio, fast response rate, low energy consumption, excellent synaptic plasticity, and good pulse cycle stability, and has great application prospects in the fields of brain-computer interface, human-computer interaction, smart medical care and smart electronic fabrics.

[0006] To achieve the above object, the present invention provides a freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor, which is composed of a source-drain fiber electrode, a gate fiber electrode and an ion gel electrolyte. The source-drain fiber electrode and the gate fiber electrode are prepared from PEDOT:PSS composite fibers. The preparation method of the PEDOT:PSS composite fibers comprises the following steps:

[0007] S1. PEDOT:PSS is fully blended with an antifreeze agent and a polymer to obtain a uniform PEDOT:PSS mixed solution; the mass ratio of the antifreeze agent in the PEDOT:PSS mixed solution is 0.2% to 20%; the mass ratio of the polymer in the PEDOT:PSS mixed solution is 0.2% to 20%;

[0008] S2. The PEDOT:PSS mixed solution obtained in step S1 is subjected to freeze-thaw cycle pretreatment to obtain a wet spinning solution; the freeze-thaw cycle pretreatment is: freezing the PEDOT:PSS mixed solution at -80°C to -30°C for 6 to 48 hours, thawing at room temperature for 2 to 6 hours, and repeating the above freezing cycle process 1 to 5 times;

[0009] S3. The wet spinning solution described in step S2 is spun into fibers using wet spinning technology, and PEDOT:PSS composite fibers are obtained by natural drying or freeze drying.

[0010] As a further improvement of the present invention, in step S1, the antifreeze agent is one or more of ethylene glycol, propylene glycol, glycerol, thiol, vinyl acetate and calcium chloride.

[0011] As a further improvement of the present invention, the polymer is one or more of polyvinyl alcohol, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, polyoxymethylene, polyethylene glycol and ultra-high molecular weight polyethylene.

[0012] As a further improvement of the present invention, in step S3, the coagulation bath in the wet spinning technology is one or more of deionized water, methanol, ethanol, isopropanol, acetone, dimethyl sulfoxide, and N,N-dimethylformamide; the spinning needle thickness is 14G~26G, the spinning needle length is 4mm~25mm, the spinning extrusion speed is 0.2mm / min~2.0mm / min, the spinning winding speed is 0.2mm / min~4.0mm / min, and the winding method is winding in the coagulation bath.

[0013] The present invention also provides an application of the above-mentioned freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor, and the freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor is applied to the detection of neurotransmitters, brain-computer interface, human-computer interaction, smart medical care and smart electronic fabrics.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor and an application thereof. The fiber-based artificial synaptic transistor consists of a source-drain fiber electrode, a gate fiber electrode and an ion gel electrolyte, wherein the source-drain fiber electrode and the gate fiber electrode are prepared from PEDOT:PSS composite fibers. PEDOT:PSS, an antifreeze agent and a polymer are used as a substrate. An anisotropic composite fiber electrode with high strength and stretchability is prepared through freeze-thaw pretreatment and wet spinning technology. The anisotropic composite fiber electrode can meet the requirements of devices of different shapes and sizes, and can also avoid problems such as breakage or failure of the electrode during operation.

[0016] The freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor of the present invention has a high switching ratio, fast response rate, low energy consumption, excellent synaptic plasticity, and good pulse cycle stability. It can achieve high-precision and high-efficiency signal transmission and data processing, and has broad application prospects in the fields of brain-computer interface, human-computer interaction, smart medical care, and smart electronic fabrics. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart and actual picture of the wet spinning process of PEDOT:PSS composite fibers provided in Example 1 of the present invention.

[0018] Figure 2 Scanning electron microscope images of the PEDOT:PSS composite fibers provided in Example 1 and Comparative Example 5 of the present invention.

[0019] Figure 3 This is a diagram of the postsynaptic response current and energy consumption of the freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor provided in Example 1 of the present invention.

[0020] Figure 4 The freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor pulse cycling stability provided in Example 1 of the present invention.

[0021] Figure 5 This is a stress-strain curve diagram of the PEDOT:PSS composite fiber provided in Examples 1-3 of the present invention and Comparative Example 1.

[0022] Figure 6The dopamine-mediated plasticity of the freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0025] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0026] The invention provides a freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor, which consists of a source-drain fiber electrode, a gate fiber electrode and an ion gel electrolyte. The source-drain fiber electrode and the gate fiber electrode are prepared from PEDOT:PSS composite fibers; the ion gel electrolyte is prepared from P(VDF-HFP) (poly(vinylidene fluoride-hexafluoropropylene)), EMIM (1-ethyl-3-methylimidazole): TFSI (bis(trifluoromethanesulfonyl)imide) and acetone (acetone).

[0027] As electrode materials, PEDOT:PSS composite fibers have good electrical conductivity and electrochemical stability, and can effectively simulate the functions of biological synapses, such as signal transmission and storage. Composite fiber-based electrodes have good flexibility and stretchability, making them suitable for wearable electronics and flexible electronic devices. The combination of ion gel electrolyte and PEDOT:PSS composite fibers improves environmental stability and can maintain performance under different environmental conditions.

[0028] The preparation method of PEDOT:PSS composite fiber comprises the following steps:

[0029] S1. PEDOT:PSS is fully blended with an antifreeze agent and a polymer to obtain a uniform PEDOT:PSS mixed solution, wherein the mass ratio of the antifreeze agent in the PEDOT:PSS mixed solution is preferably 0.2% to 20%, and the mass ratio of the polymer in the PEDOT:PSS mixed solution is preferably 0.2% to 20%.

[0030] Specifically, the antifreeze is preferably one or more of ethylene glycol, propylene glycol, glycerol, thiol, vinyl acetate and calcium chloride; an appropriate amount of antifreeze can improve the stability and processability of PEDOT:PSS at low temperatures, prevent phase separation or structural damage of PEDOT:PSS in the solution during freeze-thaw cycles, and maintain the stability of the solution.

[0031] The polymer is preferably one or more of polyvinyl alcohol, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, polyoxymethylene, polyethylene glycol and ultra-high molecular weight polyethylene; the polymer helps to enhance the mechanical properties and stability of the PEDOT:PSS fiber. An appropriate amount of polymer can interact with PEDOT:PSS to improve the structure of its conductive network, thereby improving the conductivity of the final composite fiber. The polymer can form a cross-linked structure in the PEDOT:PSS fiber, enhance the mechanical strength and toughness of the fiber, and make it more resistant to wear and stretching.

[0032] By adjusting the mass ratio of antifreeze agent and polymer, the mechanical properties and environmental stability of PEDOT:PSS composite fibers can be optimized while maintaining their conductivity.

[0033] S2. The PEDOT:PSS mixed solution obtained in step S1 is subjected to freeze-thaw cycle pretreatment to obtain a wet spinning solution. The freeze-thaw cycle pretreatment is as follows: the PEDOT:PSS mixed solution is frozen in a -80°C to -30°C refrigerator for 6 to 48 hours, thawed at room temperature for 2 to 6 hours, and the above freezing cycle process is repeated 1 to 5 times.

[0034] Pretreatment by freeze-thaw cycles can promote uniform mixing of the components in the solution, help eliminate bubbles and impurities in the solution, and improve the uniformity of the solution. The microstructure and electrical properties of PEDOT:PSS composite fibers can be improved by freeze-thaw cycles, giving them better conductivity and mechanical strength. This is because the freeze-thaw process helps rearrange the PEDOT:PSS chains, reducing the insulating effect of PSS and thus improving conductivity. The pretreated solution is easier to process into fibers through wet spinning technology, reducing broken fibers and defects during the spinning process.

[0035] S3. The wet spinning solution in step S2 is spun into fibers using wet spinning technology, and PEDOT:PSS composite fibers are obtained by natural drying or freeze drying.

[0036] Specifically, in the wet spinning technology, the coagulation bath is preferably one or more of deionized water, methanol, ethanol, isopropanol, acetone, dimethyl sulfoxide, and N,N-dimethylformamide; the spinning needle thickness is preferably 14G to 26G, the spinning needle length is preferably 4mm to 25mm, the spinning extrusion speed is preferably 0.2mm / min to 2.0mm / min, the spinning winding speed is preferably 0.2mm / min to 4.0mm / min, and the winding method is winding in the coagulation bath. The obtained PEDOT:PSS composite fiber has good mechanical properties and conductive properties. The diameter and morphology of the fiber can be controlled by adjusting the spinning parameters to meet the needs of specific applications. The winding method in the coagulation bath helps to reduce damage and contamination of the fiber during the collection process.

[0037] The prepared freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor is used in the fields of neurotransmitter detection, brain-computer interface, human-computer interaction, smart medical care and smart electronic fabrics.

[0038] Due to the good flexibility and stretchability of PEDOT:PSS composite fibers, they are suitable for integration into wearable devices; the low energy consumption characteristics make these transistors more energy-efficient when running for a long time, suitable for battery-powered devices; PEDOT:PSS materials have good biocompatibility and are suitable for applications in the medical field.

[0039] The freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor provided by the present invention is described below in conjunction with specific embodiments.

[0040] Example 1

[0041] Example 1 provides a freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor, which is composed of a source-drain fiber electrode, a gate fiber electrode and an ion gel electrolyte, wherein the source-drain fiber electrode and the gate fiber electrode are prepared from PEDOT:PSS composite fibers. The preparation method of the ion gel electrolyte is to continuously stir the raw materials in a 60°C water bath at a mass ratio of P(VDF-HFP):(EMIM:TFSI):acetone=1:4:7 until the particles are completely dissolved, and then the ion gel electrolyte is obtained after cooling.

[0042] The preparation method of PEDOT:PSS composite fiber comprises the following steps:

[0043] S1. PEDOT:PSS is fully blended with ethylene glycol and polyvinyl alcohol to obtain a uniform PEDOT:PSS mixed solution; wherein the mass ratio of ethylene glycol in the PEDOT:PSS mixed solution is 10%, and the mass ratio of polyvinyl alcohol in the PEDOT:PSS mixed solution is 5%.

[0044] S2. The PEDOT:PSS mixed solution was subjected to freeze-thaw cycle pretreatment, specifically, freezing in a -30°C refrigerator for 12 hours, thawing at room temperature for 4 hours, and then repeating the above freezing cycle process 3 times, and obtaining a wet spinning solution by natural drying.

[0045] S3. The wet spinning solution was spun into PEDOT:PSS composite fibers using wet spinning technology. The coagulation bath was deionized water. The spinning needle was 16G in thickness and 10mm in length. The spinning extrusion speed was 1.0mm / min. The spinning winding speed was 2.0mm / min. The winding method was winding in the coagulation bath.

[0046] Embodiment 2-5

[0047] Examples 2-5 respectively provide a freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor. Compared with Example 1, the only difference is that in the preparation method of the PEDOT:PSS composite fiber, the mass ratio of polyvinyl alcohol in the PEDOT:PSS mixed solution is different, namely 10%, 15%, 20% and 0.2%, respectively. The other experimental parameters and conditions are basically the same as those in Example 1 and will not be repeated here.

[0048] Embodiment 6-7

[0049] Examples 6-7 respectively provide a freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor. Compared with Example 1, the only difference is that in the preparation method of the PEDOT:PSS composite fiber, the mass ratio of ethylene glycol in the PEDOT:PSS mixed solution is different, which are 0.2% and 20% respectively. The other experimental parameters and conditions are basically the same as those in Example 1 and will not be repeated here.

[0050] Comparative Example 1-2

[0051] Comparative Examples 1-2 respectively provide a freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor. Compared with Example 1, the only difference is that in the preparation method of the PEDOT:PSS composite fiber, Comparative Example 1 does not add polyvinyl alcohol, and Comparative Example 2 adds 25% polyvinyl alcohol. The other experimental parameters and conditions are basically the same as those in Example 1 and will not be repeated here.

[0052] Comparative Examples 3-4

[0053] Comparative Examples 3-4 respectively provide a freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor. Compared with Example 1, the only difference is that in the preparation method of the PEDOT:PSS composite fiber, Comparative Example 3 does not add ethylene glycol, and Comparative Example 4 adds 25% ethylene glycol. The other experimental parameters and conditions are basically the same as those in Example 1 and will not be repeated here.

[0054] Comparative Example 5

[0055] Comparative Example 5 provides a freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor. Compared with Example 1, the only difference is that in the preparation method of the PEDOT:PSS composite fiber, the PEDOT:PSS mixed solution is not subjected to freeze-thaw cycle pretreatment. Other experimental parameters and conditions are basically the same as those in Example 1 and will not be repeated here.

[0056] See also Figure 1 As shown, it is the PEDOT:PSS composite fiber wet spinning process flow chart and physical picture provided in Example 1; Figure 2 The scanning electron microscope images of the PEDOT:PSS composite fibers provided in Example 1 and Comparative Example 5 are the plan view and cross-sectional view of the PEDOT:PSS fibers of Comparative Example 5 without freeze-thaw treatment, and the second row is the plan view and cross-sectional view of the PEDOT:PSS composite fibers after freeze-thaw treatment of Example 1. It can be seen that the PEDOT:PSS composite fibers prepared by freeze-thaw technology are fuller and have a more obvious orientation than the PEDOT:PSS fibers without freeze-thaw treatment.

[0057] See also Figure 3 As shown in the figure, the postsynaptic response current and energy consumption diagram of the freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor provided in Example 1, it can be seen that when an excitatory pulse stimulation (V g <0V) devices exhibited good excitatory postsynaptic currents, and the postsynaptic response current increased with the increase of pulse stimulation; the energy consumption of the fiber-based artificial synaptic transistor was as low as 43.4pJ.

[0058] See also Figure 4 As shown, the pulse cycling stability of the freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor provided in Example 1 can be seen. It can be seen that the transistor maintains good repeatability under 4000 alternating cycles of applied voltage.

[0059] See also Figure 5As shown, it is a stress-strain curve diagram of the PEDOT:PSS composite fiber provided in Examples 1-3 and Comparative Example 1. It can be seen that with the increase of the concentration of polyvinyl alcohol, the strength of the fiber is improved, indicating that the addition of polyvinyl alcohol enhances the strength of the fiber; and compared with the PEDOT:PSS fiber without adding polyvinyl alcohol, the elongation at break of the PEDOT:PSS composite fiber is significantly improved.

[0060] See also Figure 6 As shown in FIG. 1 , the dopamine-mediated plasticity of the freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor provided in Example 1. It can be seen that when 5 identical excitatory pulse stimuli (V gs =-200mV, pulse width 0.13s), when the detection substance is PBS buffer, the change in the device's postsynaptic response current (ΔI) is much smaller than the change in the device's current when the detection substance is 100nM dopamine neurotransmitter. The reason is that the Faraday induced electric field generated by the redox of dopamine on the gate surface causes the channel conductive polymer to increase its doping degree, and the device current becomes larger, showing good dopamine response performance. Secondly, when pulse stimulation is applied continuously in a short period of time, the postsynaptic response current gradually increases, indicating that the fiber-based artificial synaptic transistor has good memory function.

[0061] In Comparative Example 2, due to the excessive addition of polyvinyl alcohol, the viscosity of the PEDOT:PSS mixed solution was too high, and the bubbles generated during the mixing process were difficult to remove. Therefore, the PEDOT:PSS mixed solution was difficult to continuously form fibers during the wet spinning process.

[0062] In Comparative Example 3, since no antifreeze was added, the ice crystals formed during the freeze-thaw process destroyed the molecular chain structure in the PEDOT:PSS mixed solution, resulting in an increase in the volume of the solution. In Comparative Example 4, excessive antifreeze was added, which was not conducive to the preparation of fibers by wet spinning of the PEDOT:PSS mixed solution, and had a significant impact on the conductive properties of the PEDOT:PSS composite fibers.

[0063] In summary, the freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor provided by the present invention is composed of a source-drain fiber electrode, a gate fiber electrode and an ion gel electrolyte, wherein the source-drain fiber electrode and the gate fiber electrode are prepared from PEDOT:PSS composite fibers, and PEDOT:PSS, antifreeze and polymer are used as substrates, and an anisotropic composite fiber electrode with high strength and stretchability is prepared by freeze-thaw pretreatment and wet spinning technology. The above-mentioned fiber-based artificial synaptic transistor has a high switching ratio, fast response rate, low energy consumption, excellent synaptic plasticity, and good pulse cycle stability, and has great application prospects in the fields of brain-computer interface, human-computer interaction, smart medical care and smart electronic fabrics.

[0064] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor, characterized in that: It consists of a source-drain fiber electrode, a grid fiber electrode and an ion gel electrolyte, wherein the source-drain fiber electrode and the grid fiber electrode are made of PEDOT:PSS composite fibers; The preparation method of the PEDOT:PSS composite fiber comprises the following steps: S1. PEDOT:PSS is fully mixed with an antifreeze agent and a polymer to obtain a uniform PEDOT:PSS mixed solution; The mass ratio of the antifreeze agent in the PEDOT:PSS mixed solution is 0.2% to 20%; the mass ratio of the polymer in the PEDOT:PSS mixed solution is 0.2% to 20%; S2. performing freeze-thaw cycle pretreatment on the PEDOT:PSS mixed solution obtained in step S1 to obtain a wet spinning solution; The freeze-thaw cycle pretreatment is as follows: freezing the PEDOT:PSS mixed solution at -80°C to -30°C for 6 to 48 hours, thawing at room temperature for 2 to 6 hours, and repeating the freezing cycle process 1 to 5 times; S3. The wet spinning solution described in step S2 is spun into fibers using wet spinning technology, and PEDOT:PSS composite fibers are obtained by natural drying or freeze drying.

2. The freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor according to claim 1, characterized in that: In step S1, the antifreeze agent is one or more of ethylene glycol, propylene glycol, glycerol, mercaptan, vinyl acetate and calcium chloride.

3. The freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor according to claim 2, characterized in that: The polymer is one or more of polyvinyl alcohol, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, polyoxymethylene, polyethylene glycol and ultra-high molecular weight polyethylene.

4. The freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor according to claim 1, characterized in that: In step S3, the coagulation bath in the wet spinning technology is one or more of deionized water, methanol, ethanol, isopropanol, acetone, dimethyl sulfoxide, and N,N-dimethylformamide.

5. The freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor according to claim 4, characterized in that: In the wet spinning technology, the spinning needle has a thickness of 14G to 26G, a length of 4mm to 25mm, a spinning extrusion speed of 0.2mm / min to 2.0mm / min, a spinning winding speed of 0.2mm / min to 4.0mm / min, and a winding method of winding in a coagulation bath.

6. An application of the freeze-thaw enhanced low energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor according to any one of claims 1 to 5, characterized in that: The freeze-thaw enhanced low-energy consumption PEDOT:PSS composite fiber-based artificial synaptic transistor is used in the fields of neurotransmitter detection, brain-computer interface, human-computer interaction, smart medical care and smart electronic fabrics.

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