Weavable all-carbon memory memory, its preparation method and application

A memory and memory technology, applied in the field of new electronic devices and preparations, can solve the problems of low device switching and cannot meet the multiple reading and writing requirements of wearable memory storage devices, and achieve long switch life, good flexibility, and high switching ratio Effect

Active Publication Date: 2018-05-29
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Description
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Problems solved by technology

[0003] Recently, Sun et al. wrapped graphene oxide on the surface of carbon nanotube fibers and woven the obtained fibers with each other to obtain a non-volatile memory device that can only be written once (write-once-read-many-times) , but the switching of the device is relatively low, about 10 3 -10 4 , which cannot meet the requirement that the data in the wearable memory storage device should be able to read and write multiple times

Method used

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  • Weavable all-carbon memory memory, its preparation method and application
  • Weavable all-carbon memory memory, its preparation method and application
  • Weavable all-carbon memory memory, its preparation method and application

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[0040] Another aspect of the present invention provides a preparation method for preparing the woven all-carbon fiber memory storage device. In a typical embodiment, the preparation method includes: using graphene oxide powder as raw material, forming Acidic graphene oxide aqueous solution, wrap graphene oxide on the surface of flexible carbon nanotube fibers by solution impregnation, reduce graphene oxide by heat treatment, and finally cross weave the obtained functionalized carbon fiber tube fibers and connect them Electrodes, get weavable full carbon memory storage.

[0041] The memory storage device involved in the invention has high switching ratio, fast switching speed, long switching life, good device reproducibility, simple preparation process and less requirements on preparation equipment.

[0042] Further, see figure 1 , as a preferred embodiment of the present invention, it can use commercial graphene oxide powder (A) as raw material, add water (B), inorganic acid ...

Embodiment 1

[0054] Example 1 Preparation of acidic graphene oxide: Add 3.2 mg of commercial graphene oxide as a starting material to 4 ml of deionized water, and add 50 ul of 97% concentrated HNO 3 The pH value of the solution was adjusted to 1, and then the obtained solution was placed in an ultrasonic pool with a power of 300W for 30 minutes to obtain acidic graphene oxide with a concentration of 0.8 mg / ml at pH=1. then follow figure 1 The method in the technical route obtains a woven all-carbon memory storage device, and the morphology of graphene wrapped in carbon nanofibers is as follows: Figure 4 The switching ratio and threshold voltage of the device are shown in Table 1.

[0055] Table 1: Properties of memory devices prepared with 0.8 mg / ml starting material in Example 1

[0056] Sample serial number

Embodiment 2

[0057] Example 2 Preparation of acidic graphene oxide: Add 1.6 mg of commercial graphene oxide as a starting material to 4 ml of deionized water, and add 50 ul of 97% concentrated HNO 3 The pH value of the solution was adjusted to 1, and then the obtained solution was placed in an ultrasonic pool with a power of 300W for 30 minutes to obtain acidic graphene oxide with a concentration of 0.4 mg / ml at pH=1. then follow figure 1 The method in the technical route obtains a woven all-carbon memory storage device, and the switching ratio and threshold voltage of the device are shown in Table 2.

[0058] Table 2: Memory device properties prepared with 0.4mg / ml starting material in Example 2

[0059] Sample serial number

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Abstract

The invention discloses a weavable all-carbon memory storage, its preparation method and application. The woven all-carbon memory memory includes acidic heat-reduced graphene-wrapped carbon nanotube fibers and electrodes; its preparation method includes: using graphene oxide powder as a raw material, forming an acidic graphene oxide aqueous solution by adjusting the pH value, and The method of solution impregnation wraps graphene oxide on the surface of flexible carbon nanotube fibers, reduces graphene oxide by heat treatment, and finally interweaves the obtained functionalized carbon nanotube fibers with each other, and connects the upper electrodes to form the all-carbon memory memory . The braidable all-carbon memory memory of the present invention has high switch ratio, fast switch speed, long switch life, good flexibility, and is easy to process to form various forms of braids, especially suitable for use as wearable electronic devices. Moreover, the preparation process is simple, the raw materials are easily obtained, the equipment is simple, the cost is low, and the method is suitable for large-scale production.

Description

technical field [0001] The invention relates to a memory storage, in particular to a weavable full-carbon memory storage, a preparation method and application thereof, and belongs to the field of new electronic devices and preparations. Background technique [0002] At present, wearable electronic equipment has become an important development direction in the field of consumer electronics, for example, the "Moto 360 Smart Watch" recently released by Motorola Inc., the "Apple Watch Smart Watch" developed by Apple Inc. Watches”, “smart bracelets” launched by Xiaomi Inc., etc. In future life, flexible and weavable fiber-like smart devices can be combined with the clothes people usually wear, which has great application prospects. For these flexible and weavable smart devices, flexible fiber devices with memory storage function are one of the important components to realize this kind of wearable smart devices similar to clothes. In recent years, due to its unique physical, che...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L45/00H01L27/24
Inventor 李清文李儒
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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