Preparation method of flexible biological memristor for neurosynaptic bionics

A neural synapse and memristor technology, which is applied in the field of preparation of flexible biological memristors, can solve the problems such as the number of times of erasing and writing and the switching ratio need to be further improved, the time of data retention is short, the number of times of writing and erasing is small, etc. Achieve the effect of reducing leakage paths and invalid defects, long data retention time, and low operating voltage

Active Publication Date: 2020-02-04
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to expand its application in information storage and other fields, the number of rewritable times and switching ratio still need to be further improved
[0009] To sum up, in the prior art, pure silk memristor devices have disadvantages such as less rewritable times, shorter data retention time, and single performance. Although silk fibroin composite memristors have improved performance, they There are still disadvantages such as small switch ratio, complicated operation, and high price. Compared with inorganic material memristors, there is still a lot of room for improvement.

Method used

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  • Preparation method of flexible biological memristor for neurosynaptic bionics

Examples

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Embodiment 1

[0037] A method for preparing a flexible biomemristor for synaptic bionics, the specific steps of which are:

[0038] (1) Preparation of mixed solution: degumming, dissolving, dialysis and concentration of silkworm cocoons were performed sequentially to obtain silk fibroin aqueous solution; adding AgNO to the silk fibroin aqueous solution 3 , making silk fibroin and AgNO 3 The concentration is the mixed solution of 3wt% and 2mmol / L respectively;

[0039] (2) Preparation of composite silk fibroin film: Utilize a spin coater to coat the mixed solution prepared in step (1) on the ITO conductive layer with a thickness of 100nm at a speed of 2800rpm, and the coating time is 40s to obtain a thickness of 190nm composite silk fibroin film, wherein the conductive layer is supported by a PET substrate with a thickness of 1mm;

[0040] (3) Preparation of flexible bio-memristor: Soak the composite silk fibroin film in an ethanol aqueous solution with a volume concentration of 85% for 13...

Embodiment 2

[0048] A method for preparing a flexible biomemristor for synaptic bionics, the specific steps of which are:

[0049] (1) Preparation of mixed solution: degumming, dissolving, dialysis and concentration of silkworm cocoons in sequence to obtain silk fibroin aqueous solution; adding CaCl to the silk fibroin aqueous solution 2 , making silk fibroin and CaCl 2 The concentration is the mixed solution of 3wt% and 2mmol / L respectively;

[0050] (2) Preparation of composite silk fibroin film: Utilize a spin coater to coat the mixed solution prepared in step (1) on the Ag conductive layer with a thickness of 95nm at a speed of 2800rpm, and the film coating time is 40s to obtain a thickness of 185nm composite silk fibroin film, wherein the conductive layer is supported by a PET substrate with a thickness of 1mm;

[0051] (3) Preparation of flexible biomemristor: Soak the composite silk fibroin film in an ethanol aqueous solution with a volume concentration of 85% for 130 minutes, and...

Embodiment 3

[0053] A method for preparing a flexible biomemristor for synaptic bionics, the specific steps of which are:

[0054] (1) Preparation of mixed solution: degumming, dissolving, dialysis and concentration of silkworm cocoons in turn to obtain silk fibroin aqueous solution; adding FeSO to the silk fibroin aqueous solution 4 , making silk fibroin and FeSO 4 The concentration is the mixed solution of 3wt% and 2mmol / L respectively;

[0055] (2) Preparation of composite silk fibroin film: Utilize a spin coater to coat the mixed solution prepared in step (1) on the Au conductive layer with a thickness of 103nm at a speed of 2800rpm, and the coating time is 40s to obtain a thickness of 185nm composite silk fibroin film, wherein the conductive layer is supported by a PET substrate with a thickness of 1mm;

[0056](3) Preparation of flexible bio-memristor: Soak the composite silk fibroin film in an ethanol aqueous solution with a volume concentration of 85% for 130 minutes, and then pr...

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Abstract

The invention relates to a preparation method of a flexible biological memristor for neurosynaptic bionics. The preparation method comprises the following steps: coating a mixed solution on a conductive layer to obtain a composite silk fibroin membrane, treating the composite silk fibroin membrane with ethanol or methanol, and preparing an electrode layer on the composite silk fibroin membrane toobtain the flexible biological memristor, wherein the mixed solution mainly consists of silk fibroin, metal ions and water, and the metal ions are Ag<+>, Ca<2+>, Fe<2+>, Fe<3+> or Li<+>. The preparation method of the flexible biological memristor for neurosynaptic bionics disclosed by the invention is simple and easy to operate, is capable of effectively preparing the biological memristor which ishigh in sensitivity, low in working voltage, relatively large in switch ratio, stable in signal transmission and long in data retention time, and has the characteristics of neurosynaptic bionics, thestability, durability and consistency of device can be remarkably improved, and the flexible biological memristor is low in power consumption, wide in application range and good application prospectand is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of a flexible biological memristor used for synaptic bionics. Background technique [0002] Memristor is a non-linear resistance device with memory function composed of electronic conductor / insulator / electronic conductor. Its resistance value changes with the amount of charge flowing through the device, and it can maintain the existing resistance. The above structural features and memristive properties are very similar to the structure of the synapse and its working mechanism of using the conductance changes of potassium and sodium ion channels to generate excitement and transmit information, and it is an ideal device for bionic construction of synapses. However, the key to using memristors to bionically simulate neural synapses is to develop a memristive functional layer with low power consumption, high sensitivity, and stable signal transmission,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L45/00
CPCH10N70/881H10N70/011
Inventor 范苏娜张艺张耀鹏刘伟周广东邵惠丽王文波
Owner DONGHUA UNIV
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