Freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor and its applications

Abstract

This invention provides a freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor and its applications. The fiber-based artificial synaptic transistor consists of source / drain fiber electrodes, a gate fiber electrode, and an ion gel electrolyte. The source / drain and gate fiber electrodes are prepared from PEDOT:PSS composite fibers. Using PEDOT:PSS, antifreeze, and polymers as substrates, the anisotropic composite fiber electrodes with high strength, short energy dissipation paths, and stretchability are prepared through freeze-thaw pretreatment and wet spinning technology. The freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor provided by this invention exhibits a high on / off ratio, fast response rate, low energy consumption, excellent synaptic plasticity, and good pulse cycle stability, showing great application potential in brain-computer interfaces, human-computer interaction, smart healthcare, and smart electronic fabrics.

Description

Technical Field

[0001] This invention relates to the field of artificial synaptic transistor technology, and in particular to a freeze-thaw enhanced low-power PEDOT:PSS composite fiber-based artificial synaptic transistor and its applications. Background Technology

[0002] Artificial synaptic transistors (ASTTs) are a novel type of electronic device that can mimic biomimetic neural synapses to process and transmit neural signals, showing great promise for applications. Currently, the main methods for fabricating artificial synaptic transistors include chemical synthesis, electrochemical deposition, and ion implantation. However, traditional methods suffer from problems such as long fabrication cycles, high costs, complex equipment, and poor stability, limiting their widespread adoption and application in practice.

[0003] The organic semiconductor polymer PEDOT:PSS (poly-3,4-ethylenedioxythiophene / polystyrene sulfonate) is widely used in smart wearable and implantable electronic devices due to its excellent biocompatibility and electrical properties. However, the high conductivity of PEDOT:PSS leads to increased device power consumption, making it difficult to meet the requirements of high-performance synaptic transistors. Furthermore, PEDOT:PSS composite fiber electrodes prepared by traditional methods such as soaking and spin coating exhibit poor interfacial interactions, are easily peeled off, and suffer from poor electrical stability. Therefore, designing the composition and structure of PEDOT:PSS composite fibers to fabricate fiber-based artificial synaptic transistors with excellent synaptic plasticity, stability, and low power consumption is a current research hotspot and challenge.

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

[0005] To address the shortcomings of the existing technology, the present invention aims to provide a freeze-thaw enhanced, low-energy-consumption PEDOT:PSS composite fiber-based artificial synaptic transistor and its applications. Using PEDOT:PSS, antifreeze, and polymer as substrates, an anisotropic composite fiber electrode with high strength and stretchability is prepared through freeze-thaw pretreatment and wet spinning technology. This fiber-based artificial synaptic transistor exhibits high on / off ratio, fast response rate, low energy consumption, excellent synaptic plasticity, and good pulse cycle stability, showing great application potential in fields such as brain-computer interfaces, human-computer interaction, smart healthcare, and smart electronic fabrics.

[0006] To achieve the above objectives, this invention provides a freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor, comprising source / drain fiber electrodes, a gate fiber electrode, and an ion gel electrolyte. The source / drain fiber electrodes and the gate fiber electrode are prepared from PEDOT:PSS composite fibers. The preparation method of the PEDOT:PSS composite fibers includes the following steps:

[0007] S1. PEDOT:PSS is thoroughly mixed with antifreeze and polymer to obtain a homogeneous PEDOT:PSS mixed solution; the antifreeze in the PEDOT:PSS mixed solution has a mass ratio of 0.2% to 20%; the polymer in the PEDOT:PSS mixed solution has a mass ratio of 0.2% to 20%.

[0008] S2. Perform freeze-thaw cycle pretreatment on the PEDOT:PSS mixed solution obtained in step S1 to obtain wet spinning solution; the freeze-thaw cycle pretreatment is as follows: freeze the PEDOT:PSS mixed solution at -80℃ to -30℃ for 6 to 48 hours, thaw it at room temperature for 2 to 6 hours, and repeat the above freezing cycle process 1 to 5 times.

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

[0010] As a further improvement of the present invention, in step S1, the antifreeze is one or more of ethylene glycol, propylene glycol, glycerin, 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 diameter is 14G to 26G, the spinning needle length is 4mm to 25mm, the spinning extrusion speed is 0.2mm / min to 2.0mm / min, the spinning winding speed is 0.2mm / min to 4.0mm / min, and the winding method is winding inside the coagulation bath.

[0013] This invention also provides applications of the aforementioned freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor, which is applied to the fields of neurotransmitter detection, brain-computer interfaces, human-computer interaction, smart healthcare, and smart electronic fabrics.

[0014] The beneficial effects of this invention are:

[0015] This invention provides a freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor and its application. The fiber-based artificial synaptic transistor is composed of source / drain fiber electrodes, gate fiber electrodes, and ion gel electrolyte. The source / drain fiber electrodes and gate fiber electrodes are prepared from PEDOT:PSS composite fibers. Using PEDOT:PSS, antifreeze, and polymer as substrates, anisotropic composite fiber electrodes with high strength and stretchability are prepared through freeze-thaw pretreatment and wet spinning technology. This can adapt to the needs of devices with different shapes and sizes, and can also avoid problems such as electrode breakage or failure during operation.

[0016] The freeze-thaw reinforced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor of this invention has a high on / off 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 healthcare, and smart electronic fabrics. Attached Figure Description

[0017] Figure 1 The flowchart and physical image of the wet spinning process of PEDOT:PSS composite fiber provided in Embodiment 1 of the present invention are shown.

[0018] Figure 2 The images shown are scanning electron microscope (SEM) images of the PEDOT:PSS composite fibers provided in Embodiment 1 and Comparative Example 5 of the present invention.

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

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

[0021] Figure 5 The stress-strain curves of PEDOT:PSS composite fibers provided in Examples 1-3 and Comparative Example 1 of this invention are shown.

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

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be 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 with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0025] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] This invention provides a freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor, which consists of source / drain fiber electrodes, gate fiber electrodes, and an ion gel electrolyte. The source / drain fiber electrodes and the gate fiber electrodes 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-methylimidazolium):TFSI (bis(trifluoromethanesulfonyl)imide) and acetone (acetone).

[0027] PEDOT:PSS composite fibers, as electrode materials, possess excellent electrical conductivity and electrochemical stability, effectively mimicking the functions of biological synapses, such as signal transmission and storage. The composite fiber-based electrodes exhibit 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 enhances environmental stability, enabling performance to be maintained under diverse environmental conditions.

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

[0029] S1. PEDOT:PSS is thoroughly mixed with antifreeze and polymer to obtain a homogeneous PEDOT:PSS mixed solution. The mass ratio of antifreeze in the PEDOT:PSS mixed solution is preferably 0.2% to 20%, and the mass ratio of 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, glycerin, 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 PEDOT:PSS fibers. An appropriate amount of polymer can interact with PEDOT:PSS, improving the structure of its conductive network, thereby increasing the electrical conductivity of the final composite fiber. The polymer can form a cross-linked structure in PEDOT:PSS fibers, enhancing the fiber's mechanical strength and toughness, making it more resistant to wear and tension.

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

[0033] S2. Perform freeze-thaw cycle pretreatment on the PEDOT:PSS mixed solution obtained in step S1 to obtain wet spinning solution. The freeze-thaw cycle pretreatment is as follows: freeze the PEDOT:PSS mixed solution in a freezer at -80℃ to -30℃ for 6 to 48 hours, thaw it at room temperature for 2 to 6 hours, and then repeat the above freezing cycle process 1 to 5 times.

[0034] Freeze-thaw cycle pretreatment promotes uniform mixing of components in the solution, helps eliminate air bubbles and impurities, and improves solution homogeneity. Freeze-thaw cycles also improve the microstructure and electrical properties of PEDOT:PSS composite fibers, resulting in better conductivity and mechanical strength. This is because the freeze-thaw process facilitates the rearrangement of PEDOT:PSS chains, reducing the insulating effect of PSS and thus improving conductivity. The pretreated solution is also easier to process into fibers using wet spinning technology, reducing fiber breakage and defects during the spinning process.

[0035] S3. The wet spinning solution in step S2 is spun into filaments using wet spinning technology, and PEDOT:PSS composite fibers are obtained by natural air 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 diameter is preferably 14G–26G, the spinning needle length is preferably 4mm–25mm, the spinning extrusion speed is preferably 0.2mm / min–2.0mm / min, the spinning winding speed is preferably 0.2mm / min–4.0mm / min, and the winding method is in-coagulation bath winding. The resulting PEDOT:PSS composite fiber has good mechanical and electrical properties. The fiber diameter and morphology can be controlled by adjusting the spinning parameters to meet the needs of specific applications. In-coagulation bath winding helps reduce fiber damage and contamination during collection.

[0037] The freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistors prepared are applied to the fields of neurotransmitter detection, brain-computer interface, human-computer interaction, smart healthcare, and smart electronic fabrics.

[0038] Due to its excellent flexibility and stretchability, PEDOT:PSS composite fiber is suitable for integration into wearable devices; its low energy consumption characteristics make these transistors more energy-efficient during long-term operation, making them suitable for battery-powered devices; and PEDOT:PSS material has good biocompatibility, making it suitable for applications in the medical field.

[0039] The freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor provided by the present invention will be described below with reference to specific embodiments.

[0040] Example 1

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

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

[0043] S1. PEDOT:PSS is thoroughly mixed with ethylene glycol and polyvinyl alcohol to obtain a homogeneous 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 is subjected to freeze-thaw cycle pretreatment, specifically by freezing in a -30℃ freezer for 12 hours, thawing at room temperature for 4 hours, and repeating the above freeze-thaw cycle process 3 times. The wet spinning solution is obtained by air drying.

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

[0046] Examples 2-5

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

[0048] Examples 6-7

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

[0050] Comparative Examples 1-2

[0051] Comparative Examples 1 and 2 respectively provide a freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor. Compared with Example 1, the only difference is that in the preparation method of PEDOT:PSS composite fiber, Comparative Example 1 did not add polyvinyl alcohol, while Comparative Example 2 added 25% polyvinyl alcohol. 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 and 4 respectively provide a freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor. Compared with Example 1, the only difference is that in the preparation method of PEDOT:PSS composite fiber, ethylene glycol was not added in Comparative Example 3, while 25% ethylene glycol was added in Comparative Example 4. 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 PEDOT:PSS composite fiber-based artificial synaptic transistor. The only difference from Example 1 is that the PEDOT:PSS mixed solution was not subjected to freeze-thaw cycle pretreatment in the preparation method of PEDOT:PSS composite fiber. Other experimental parameters and conditions are basically the same as those in Example 1, and will not be repeated here.

[0056] Please see Figure 1 The diagram shown is a flow chart and a photograph of the wet spinning process of the PEDOT:PSS composite fiber provided in Example 1. Figure 2 The images shown are scanning electron microscope (SEM) images of the PEDOT:PSS composite fibers provided in Example 1 and Comparative Example 5. The first row shows the planar and cross-sectional views of the PEDOT:PSS fibers of Comparative Example 5 without freeze-thaw treatment, and the second row shows the planar and cross-sectional views of the PEDOT:PSS composite fibers of Example 1 after freeze-thaw treatment. It can be seen that the PEDOT:PSS composite fibers prepared by freeze-thaw technology are fuller and have a more pronounced orientation than the PEDOT:PSS fibers without freeze-thaw treatment.

[0057] Please see Figure 3 The figure shows the postsynaptic response current and energy consumption of the freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor provided in Example 1. It can be seen that when an excitatory pulse stimulation (V) is applied to the gate electrode... g The <0V) device exhibits good excitatory postsynaptic current, and the postsynaptic response current increases with the intensity of the pulse stimulation; the energy consumption of this fiber-based artificial synaptic transistor is as low as 43.4pJ.

[0058] Please see Figure 4 As shown, the pulse cycle stability of the freeze-thaw enhanced low-energy 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 voltage cycles.

[0059] Please see Figure 5As shown, the stress-strain curves of PEDOT:PSS composite fibers provided in Examples 1-3 and Comparative Example 1 are shown. It can be seen that the strength of the fiber increases with the increase of polyvinyl alcohol concentration, indicating that the addition of polyvinyl alcohol enhances the strength of the fiber. Moreover, compared with PEDOT:PSS fibers without polyvinyl alcohol, the elongation at break of PEDOT:PSS composite fibers is significantly improved.

[0060] Please see Figure 6 As shown, this illustrates the dopamine-mediated plasticity of the freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor provided in Example 1. It can be seen that when five identical excitatory pulses (V) are continuously applied to the gate and source of the fiber-based synaptic transistor... gs =-200mV, pulse width 0.13s). When the detection substance is PBS buffer, the change in postsynaptic response current (ΔI) is much smaller than the change in current when the detection substance is 100nM dopamine neurotransmitter. This is because the Faraday-induced electric field generated by the redox reaction of dopamine on the gate surface increases the doping degree of the conductive polymer in the channel, resulting in a larger device current and exhibiting good dopamine response performance. Secondly, the postsynaptic response current gradually increases when pulse stimulation is applied continuously over a short period of time, indicating that the fiber-based artificial synaptic transistor has good memory function.

[0061] In Comparative Example 2, the excessive addition of polyvinyl alcohol resulted in an excessively high viscosity of the PEDOT:PSS mixed solution, making it difficult to remove the bubbles generated during the mixing process. Consequently, the PEDOT:PSS mixed solution was difficult to continuously spin into filaments during wet spinning.

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

[0063] In summary, the freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor provided by this invention consists of source / drain fiber electrodes, a gate fiber electrode, and an ion gel electrolyte. The source / drain and gate fiber electrodes are prepared from PEDOT:PSS composite fibers. Using PEDOT:PSS, antifreeze, and polymers as substrates, high-strength, stretchable, anisotropic composite fiber electrodes are prepared through freeze-thaw pretreatment and wet spinning technology. The aforementioned fiber-based artificial synaptic transistor exhibits high on / off ratio, fast response rate, low energy consumption, excellent synaptic plasticity, and good pulse cycle stability, showing great application potential in brain-computer interfaces, human-computer interaction, smart healthcare, and intelligent electronic fabrics.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A freeze-thaw enhanced low-energy PEDOT:PSS composite fiber-based artificial synaptic transistor, characterized in that, It consists of source / drain fiber electrodes, a grid fiber electrode, and an ion gel electrolyte, wherein the source / drain fiber electrodes and the grid fiber electrode are made of PEDOT:PSS composite fibers; The preparation method of the PEDOT:PSS composite fiber includes the following steps: S1. Thoroughly blend PEDOT:PSS with antifreeze and polymer to obtain a homogeneous PEDOT:PSS mixed solution; The antifreeze is present in the PEDOT:PSS mixed solution at a mass ratio of 0.2% to 20%; the polymer is present in the PEDOT:PSS mixed solution at a mass ratio of 0.2% to 20%. S2. The PEDOT:PSS mixed solution obtained in step S1 is subjected to freeze-thaw cycle pretreatment to obtain wet spinning solution; The freeze-thaw cycle pretreatment is as follows: the PEDOT:PSS mixed solution is frozen at -80℃ to -30℃ 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. S3. The wet spinning solution described in step S2 is spun into filaments using wet spinning technology, and PEDOT:PSS composite fibers are obtained by natural air drying or freeze drying.

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

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

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

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